Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (202 commits)
  [POWERPC] Fix compile breakage for 64-bit UP configs
  [POWERPC] Define copy_siginfo_from_user32
  [POWERPC] Add compat handler for PTRACE_GETSIGINFO
  [POWERPC] i2c: Fix build breakage introduced by OF helpers
  [POWERPC] Optimize fls64() on 64-bit processors
  [POWERPC] irqtrace support for 64-bit powerpc
  [POWERPC] Stacktrace support for lockdep
  [POWERPC] Move stackframe definitions to common header
  [POWERPC] Fix device-tree locking vs. interrupts
  [POWERPC] Make pci_bus_to_host()'s struct pci_bus * argument const
  [POWERPC] Remove unused __max_memory variable
  [POWERPC] Simplify xics direct/lpar irq_host setup
  [POWERPC] Use pseries_setup_i8259_cascade() in pseries_mpic_init_IRQ()
  [POWERPC] Turn xics_setup_8259_cascade() into a generic pseries_setup_i8259_cascade()
  [POWERPC] Move xics_setup_8259_cascade() into platforms/pseries/setup.c
  [POWERPC] Use asm-generic/bitops/find.h in bitops.h
  [POWERPC] 83xx: mpc8315 - fix USB UTMI Host setup
  [POWERPC] 85xx: Fix the size of qe muram for MPC8568E
  [POWERPC] 86xx: mpc86xx_hpcn - Temporarily accept old dts node identifier.
  [POWERPC] 86xx: mark functions static, other minor cleanups
  ...

39 files changed, 531 insertions, 243 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index b9dbfff9afe..ce1e8d24e74 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
 obj-$(CONFIG_SMP)		+= smp.o
 obj-$(CONFIG_KPROBES)		+= kprobes.o
 obj-$(CONFIG_PPC_UDBG_16550)	+= legacy_serial.o udbg_16550.o
+obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
 
 pci64-$(CONFIG_PPC64)		+= pci_dn.o isa-bridge.o
 obj-$(CONFIG_PCI)		+= pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 4b749c41646..292c6d8db0e 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -26,8 +26,6 @@
 #ifdef CONFIG_PPC64
 #include <linux/time.h>
 #include <linux/hardirq.h>
-#else
-#include <linux/ptrace.h>
 #endif
 
 #include <asm/io.h>
@@ -46,6 +44,9 @@
 #include <asm/mmu.h>
 #include <asm/hvcall.h>
 #endif
+#ifdef CONFIG_PPC_ISERIES
+#include <asm/iseries/alpaca.h>
+#endif
 
 #define DEFINE(sym, val) \
 	asm volatile("\n->" #sym " %0 " #val : : "i" (val))
@@ -60,7 +61,6 @@ int main(void)
 	DEFINE(AUDITCONTEXT, offsetof(struct task_struct, audit_context));
 #else
 	DEFINE(THREAD_INFO, offsetof(struct task_struct, stack));
-	DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
 #endif /* CONFIG_PPC64 */
 
 	DEFINE(KSP, offsetof(struct thread_struct, ksp));
@@ -80,7 +80,6 @@ int main(void)
 	DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
 	DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));
-	DEFINE(PT_PTRACED, PT_PTRACED);
 #endif
 #ifdef CONFIG_SPE
 	DEFINE(THREAD_EVR0, offsetof(struct thread_struct, evr[0]));
@@ -325,6 +324,9 @@ int main(void)
 	DEFINE(PAGE_OFFSET_VSID, KERNEL_VSID(PAGE_OFFSET));
 	DEFINE(VMALLOC_START_ESID, GET_ESID(VMALLOC_START));
 	DEFINE(VMALLOC_START_VSID, KERNEL_VSID(VMALLOC_START));
+
+	/* alpaca */
+	DEFINE(ALPACA_SIZE, sizeof(struct alpaca));
 #endif
 
 	DEFINE(PGD_TABLE_SIZE, PGD_TABLE_SIZE);
diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index 80e2eef05b2..9f937774549 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -7,6 +7,7 @@
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/lmb.h>
 
 #include <asm/sections.h>
 #include <asm/prom.h>
@@ -15,7 +16,7 @@
 #include <asm/mmu.h>
 #include <asm/pgtable.h>
 #include <asm/io.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/processor.h>
 #include <asm/udbg.h>
 
diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S
index 6250443ab9c..5465e8de0e6 100644
--- a/arch/powerpc/kernel/cpu_setup_44x.S
+++ b/arch/powerpc/kernel/cpu_setup_44x.S
@@ -3,7 +3,7 @@
  * Valentine Barshak <vbarshak@ru.mvista.com>
  * MontaVista Software, Inc (c) 2007
  *
- * Based on cpu_setup_6xx code by 
+ * Based on cpu_setup_6xx code by
  * Benjamin Herrenschmidt <benh@kernel.crashing.org>
  *
  * This program is free software; you can redistribute it and/or
@@ -32,6 +32,9 @@ _GLOBAL(__setup_cpu_440grx)
 	bl	__fixup_440A_mcheck
 	mtlr	r4
 	blr
+_GLOBAL(__setup_cpu_460ex)
+_GLOBAL(__setup_cpu_460gt)
+	b	__init_fpu_44x
 _GLOBAL(__setup_cpu_440gx)
 _GLOBAL(__setup_cpu_440spe)
 	b	__fixup_440A_mcheck
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 2a8f5cc5184..26ffb44e270 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -36,6 +36,8 @@ extern void __setup_cpu_440epx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440gx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440grx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440spe(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_460ex(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_460gt(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec);
@@ -1397,6 +1399,30 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.machine_check		= machine_check_440A,
 		.platform		= "ppc440",
 	},
+	{ /* 460EX */
+		.pvr_mask		= 0xffff0002,
+		.pvr_value		= 0x13020002,
+		.cpu_name		= "460EX",
+		.cpu_features		= CPU_FTRS_44X,
+		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
+		.icache_bsize		= 32,
+		.dcache_bsize		= 32,
+		.cpu_setup		= __setup_cpu_460ex,
+		.machine_check		= machine_check_440A,
+		.platform		= "ppc440",
+	},
+	{ /* 460GT */
+		.pvr_mask		= 0xffff0002,
+		.pvr_value		= 0x13020000,
+		.cpu_name		= "460GT",
+		.cpu_features		= CPU_FTRS_44X,
+		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
+		.icache_bsize		= 32,
+		.dcache_bsize		= 32,
+		.cpu_setup		= __setup_cpu_460gt,
+		.machine_check		= machine_check_440A,
+		.platform		= "ppc440",
+	},
 #endif /* CONFIG_44x */
 #ifdef CONFIG_FSL_BOOKE
 #ifdef CONFIG_E200
@@ -1512,7 +1538,7 @@ struct cpu_spec * __init identify_cpu(unsigned long offset, unsigned int pvr)
 				*t = *s;
 			*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
 #if defined(CONFIG_PPC64) || defined(CONFIG_BOOKE)
-			/* ppc64 and booke expect identify_cpu to also call 
+			/* ppc64 and booke expect identify_cpu to also call
 			 * setup_cpu for that processor. I will consolidate
 			 * that at a later time, for now, just use #ifdef.
 			 * we also don't need to PTRRELOC the function pointer
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 571132ed12c..eae401de3f7 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -24,12 +24,13 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/types.h>
+#include <linux/lmb.h>
 
 #include <asm/processor.h>
 #include <asm/machdep.h>
 #include <asm/kexec.h>
 #include <asm/kdump.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/firmware.h>
 #include <asm/smp.h>
 #include <asm/system.h>
diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c
index 29ff77c468a..9ee3c5278db 100644
--- a/arch/powerpc/kernel/crash_dump.c
+++ b/arch/powerpc/kernel/crash_dump.c
@@ -13,8 +13,9 @@
 
 #include <linux/crash_dump.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <asm/kdump.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/firmware.h>
 #include <asm/uaccess.h>
 
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 69a91bd4611..84c86863306 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -110,9 +110,9 @@ transfer_to_handler:
 	stw	r11,PT_REGS(r12)
 #if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
 	/* Check to see if the dbcr0 register is set up to debug.  Use the
-	   single-step bit to do this. */
+	   internal debug mode bit to do this. */
 	lwz	r12,THREAD_DBCR0(r12)
-	andis.	r12,r12,DBCR0_IC@h
+	andis.	r12,r12,DBCR0_IDM@h
 	beq+	3f
 	/* From user and task is ptraced - load up global dbcr0 */
 	li	r12,-1			/* clear all pending debug events */
@@ -120,6 +120,12 @@ transfer_to_handler:
 	lis	r11,global_dbcr0@ha
 	tophys(r11,r11)
 	addi	r11,r11,global_dbcr0@l
+#ifdef CONFIG_SMP
+	rlwinm	r9,r1,0,0,(31-THREAD_SHIFT)
+	lwz	r9,TI_CPU(r9)
+	slwi	r9,r9,3
+	add	r11,r11,r9
+#endif
 	lwz	r12,0(r11)
 	mtspr	SPRN_DBCR0,r12
 	lwz	r12,4(r11)
@@ -238,10 +244,10 @@ ret_from_syscall:
 	stw	r11,_CCR(r1)
 syscall_exit_cont:
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-	/* If the process has its own DBCR0 value, load it up.  The single
-	   step bit tells us that dbcr0 should be loaded. */
+	/* If the process has its own DBCR0 value, load it up.  The internal
+	   debug mode bit tells us that dbcr0 should be loaded. */
 	lwz	r0,THREAD+THREAD_DBCR0(r2)
-	andis.	r10,r0,DBCR0_IC@h
+	andis.	r10,r0,DBCR0_IDM@h
 	bnel-	load_dbcr0
 #endif
 #ifdef CONFIG_44x
@@ -666,10 +672,10 @@ user_exc_return:		/* r10 contains MSR_KERNEL here */
 
 restore_user:
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-	/* Check whether this process has its own DBCR0 value.  The single
-	   step bit tells us that dbcr0 should be loaded. */
+	/* Check whether this process has its own DBCR0 value.  The internal
+	   debug mode bit tells us that dbcr0 should be loaded. */
 	lwz	r0,THREAD+THREAD_DBCR0(r2)
-	andis.	r10,r0,DBCR0_IC@h
+	andis.	r10,r0,DBCR0_IDM@h
 	bnel-	load_dbcr0
 #endif
 
@@ -879,6 +885,12 @@ load_dbcr0:
 	mfspr	r10,SPRN_DBCR0
 	lis	r11,global_dbcr0@ha
 	addi	r11,r11,global_dbcr0@l
+#ifdef CONFIG_SMP
+	rlwinm	r9,r1,0,0,(31-THREAD_SHIFT)
+	lwz	r9,TI_CPU(r9)
+	slwi	r9,r9,3
+	add	r11,r11,r9
+#endif
 	stw	r10,0(r11)
 	mtspr	SPRN_DBCR0,r0
 	lwz	r10,4(r11)
@@ -891,7 +903,7 @@ load_dbcr0:
 	.section .bss
 	.align	4
 global_dbcr0:
-	.space	8
+	.space	8*NR_CPUS
 	.previous
 #endif /* !(CONFIG_4xx || CONFIG_BOOKE) */
 
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 148a3547c9a..c0db5b769e5 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -29,6 +29,8 @@
 #include <asm/cputable.h>
 #include <asm/firmware.h>
 #include <asm/bug.h>
+#include <asm/ptrace.h>
+#include <asm/irqflags.h>
 
 /*
  * System calls.
@@ -39,7 +41,7 @@
 
 /* This value is used to mark exception frames on the stack. */
 exception_marker:
-	.tc	ID_72656773_68657265[TC],0x7265677368657265
+	.tc	ID_EXC_MARKER[TC],STACK_FRAME_REGS_MARKER
 
 	.section	".text"
 	.align 7
@@ -88,6 +90,14 @@ system_call_common:
 	addi	r9,r1,STACK_FRAME_OVERHEAD
 	ld	r11,exception_marker@toc(r2)
 	std	r11,-16(r9)		/* "regshere" marker */
+#ifdef CONFIG_TRACE_IRQFLAGS
+	bl	.trace_hardirqs_on
+	REST_GPR(0,r1)
+	REST_4GPRS(3,r1)
+	REST_2GPRS(7,r1)
+	addi	r9,r1,STACK_FRAME_OVERHEAD
+	ld	r12,_MSR(r1)
+#endif /* CONFIG_TRACE_IRQFLAGS */
 	li	r10,1
 	stb	r10,PACASOFTIRQEN(r13)
 	stb	r10,PACAHARDIRQEN(r13)
@@ -102,7 +112,7 @@ BEGIN_FW_FTR_SECTION
 	b	hardware_interrupt_entry
 2:
 END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
-#endif
+#endif /* CONFIG_PPC_ISERIES */
 	mfmsr	r11
 	ori	r11,r11,MSR_EE
 	mtmsrd	r11,1
@@ -504,6 +514,10 @@ BEGIN_FW_FTR_SECTION
 
 	li	r3,0
 	stb	r3,PACASOFTIRQEN(r13)	/* ensure we are soft-disabled */
+#ifdef CONFIG_TRACE_IRQFLAGS
+	bl	.trace_hardirqs_off
+	mfmsr	r10
+#endif
 	ori	r10,r10,MSR_EE
 	mtmsrd	r10			/* hard-enable again */
 	addi	r3,r1,STACK_FRAME_OVERHEAD
@@ -512,7 +526,7 @@ BEGIN_FW_FTR_SECTION
 4:
 END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
 #endif
-	stb	r5,PACASOFTIRQEN(r13)
+	TRACE_AND_RESTORE_IRQ(r5);
 
 	/* extract EE bit and use it to restore paca->hard_enabled */
 	ld	r3,_MSR(r1)
@@ -580,6 +594,16 @@ do_work:
 	bne	restore
 	/* here we are preempting the current task */
 1:
+#ifdef CONFIG_TRACE_IRQFLAGS
+	bl	.trace_hardirqs_on
+	/* Note: we just clobbered r10 which used to contain the previous
+	 * MSR before the hard-disabling done by the caller of do_work.
+	 * We don't have that value anymore, but it doesn't matter as
+	 * we will hard-enable unconditionally, we can just reload the
+	 * current MSR into r10
+	 */
+	mfmsr	r10
+#endif /* CONFIG_TRACE_IRQFLAGS */
 	li	r0,1
 	stb	r0,PACASOFTIRQEN(r13)
 	stb	r0,PACAHARDIRQEN(r13)
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 0f4fac51202..785af9b5659 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -30,6 +30,7 @@
 #include <asm/thread_info.h>
 #include <asm/ppc_asm.h>
 #include <asm/asm-offsets.h>
+#include <asm/ptrace.h>
 
 /* 601 only have IBAT; cr0.eq is set on 601 when using this macro */
 #define LOAD_BAT(n, reg, RA, RB)	\
@@ -268,8 +269,8 @@ __secondary_hold_acknowledge:
 	li	r10,MSR_KERNEL & ~(MSR_IR|MSR_DR); /* can take exceptions */ \
 	MTMSRD(r10);			/* (except for mach check in rtas) */ \
 	stw	r0,GPR0(r11);	\
-	lis	r10,0x7265;		/* put exception frame marker */ \
-	addi	r10,r10,0x6773;	\
+	lis	r10,STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */ \
+	addi	r10,r10,STACK_FRAME_REGS_MARKER@l; \
 	stw	r10,8(r11);	\
 	SAVE_4GPRS(3, r11);	\
 	SAVE_2GPRS(7, r11)
@@ -763,23 +764,6 @@ load_up_altivec:
 	b	fast_exception_return
 
 /*
- * AltiVec unavailable trap from kernel - print a message, but let
- * the task use AltiVec in the kernel until it returns to user mode.
- */
-KernelAltiVec:
-	lwz	r3,_MSR(r1)
-	oris	r3,r3,MSR_VEC@h
-	stw	r3,_MSR(r1)	/* enable use of AltiVec after return */
-	lis	r3,87f@h
-	ori	r3,r3,87f@l
-	mr	r4,r2		/* current */
-	lwz	r5,_NIP(r1)
-	bl	printk
-	b	ret_from_except
-87:	.string	"AltiVec used in kernel  (task=%p, pc=%x)  \n"
-	.align	4,0
-
-/*
  * giveup_altivec(tsk)
  * Disable AltiVec for the task given as the argument,
  * and save the AltiVec registers in its thread_struct.
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index ad071a146a8..b84ec6a2fc9 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -211,7 +211,7 @@ skpinv:	addi	r4,r4,1				/* Increment */
 	SET_IVOR(12, WatchdogTimer);
 	SET_IVOR(13, DataTLBError);
 	SET_IVOR(14, InstructionTLBError);
-	SET_IVOR(15, Debug);
+	SET_IVOR(15, DebugCrit);
 
 	/* Establish the interrupt vector base */
 	lis	r4,interrupt_base@h	/* IVPR only uses the high 16-bits */
@@ -578,7 +578,7 @@ interrupt_base:
 	b	InstructionStorage
 
 	/* Debug Interrupt */
-	DEBUG_EXCEPTION
+	DEBUG_CRIT_EXCEPTION
 
 /*
  * Local functions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index d3aee08e681..215973a2c8d 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -36,8 +36,7 @@
 #include <asm/firmware.h>
 #include <asm/page_64.h>
 #include <asm/exception.h>
-
-#define DO_SOFT_DISABLE
+#include <asm/irqflags.h>
 
 /*
  * We layout physical memory as follows:
@@ -450,8 +449,8 @@ bad_stack:
  */
 fast_exc_return_irq:			/* restores irq state too */
 	ld	r3,SOFTE(r1)
+	TRACE_AND_RESTORE_IRQ(r3);
 	ld	r12,_MSR(r1)
-	stb	r3,PACASOFTIRQEN(r13)	/* restore paca->soft_enabled */
 	rldicl	r4,r12,49,63		/* get MSR_EE to LSB */
 	stb	r4,PACAHARDIRQEN(r13)	/* restore paca->hard_enabled */
 	b	1f
@@ -621,7 +620,7 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
 	mtlr	r10
 
 	andi.	r10,r12,MSR_RI	/* check for unrecoverable exception */
-	beq-	unrecov_slb
+	beq-	2f
 
 .machine	push
 .machine	"power4"
@@ -643,6 +642,22 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
 	rfid
 	b	.	/* prevent speculative execution */
 
+2:
+#ifdef CONFIG_PPC_ISERIES
+BEGIN_FW_FTR_SECTION
+	b	unrecov_slb
+END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
+#endif /* CONFIG_PPC_ISERIES */
+	mfspr	r11,SPRN_SRR0
+	clrrdi	r10,r13,32
+	LOAD_HANDLER(r10,unrecov_slb)
+	mtspr	SPRN_SRR0,r10
+	mfmsr	r10
+	ori	r10,r10,MSR_IR|MSR_DR|MSR_RI
+	mtspr	SPRN_SRR1,r10
+	rfid
+	b	.
+
 unrecov_slb:
 	EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
 	DISABLE_INTS
@@ -808,7 +823,7 @@ _STATIC(load_up_altivec)
  * Hash table stuff
  */
 	.align	7
-_GLOBAL(do_hash_page)
+_STATIC(do_hash_page)
 	std	r3,_DAR(r1)
 	std	r4,_DSISR(r1)
 
@@ -820,6 +835,27 @@ BEGIN_FTR_SECTION
 END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 
 	/*
+	 * On iSeries, we soft-disable interrupts here, then
+	 * hard-enable interrupts so that the hash_page code can spin on
+	 * the hash_table_lock without problems on a shared processor.
+	 */
+	DISABLE_INTS
+
+	/*
+	 * Currently, trace_hardirqs_off() will be called by DISABLE_INTS
+	 * and will clobber volatile registers when irq tracing is enabled
+	 * so we need to reload them. It may be possible to be smarter here
+	 * and move the irq tracing elsewhere but let's keep it simple for
+	 * now
+	 */
+#ifdef CONFIG_TRACE_IRQFLAGS
+	ld	r3,_DAR(r1)
+	ld	r4,_DSISR(r1)
+	ld	r5,_TRAP(r1)
+	ld	r12,_MSR(r1)
+	clrrdi	r5,r5,4
+#endif /* CONFIG_TRACE_IRQFLAGS */
+	/*
 	 * We need to set the _PAGE_USER bit if MSR_PR is set or if we are
 	 * accessing a userspace segment (even from the kernel). We assume
 	 * kernel addresses always have the high bit set.
@@ -832,13 +868,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 	rlwimi	r4,r5,22+2,31-2,31-2	/* Set _PAGE_EXEC if trap is 0x400 */
 
 	/*
-	 * On iSeries, we soft-disable interrupts here, then
-	 * hard-enable interrupts so that the hash_page code can spin on
-	 * the hash_table_lock without problems on a shared processor.
-	 */
-	DISABLE_INTS
-
-	/*
 	 * r3 contains the faulting address
 	 * r4 contains the required access permissions
 	 * r5 contains the trap number
@@ -848,7 +877,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 	bl	.hash_page		/* build HPTE if possible */
 	cmpdi	r3,0			/* see if hash_page succeeded */
 
-#ifdef DO_SOFT_DISABLE
 BEGIN_FW_FTR_SECTION
 	/*
 	 * If we had interrupts soft-enabled at the point where the
@@ -860,7 +888,7 @@ BEGIN_FW_FTR_SECTION
 	 */
 	beq	13f
 END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
-#endif
+
 BEGIN_FW_FTR_SECTION
 	/*
 	 * Here we have interrupts hard-disabled, so it is sufficient
@@ -874,11 +902,12 @@ END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
 
 	/*
 	 * hash_page couldn't handle it, set soft interrupt enable back
-	 * to what it was before the trap.  Note that .local_irq_restore
+	 * to what it was before the trap.  Note that .raw_local_irq_restore
 	 * handles any interrupts pending at this point.
 	 */
 	ld	r3,SOFTE(r1)
-	bl	.local_irq_restore
+	TRACE_AND_RESTORE_IRQ_PARTIAL(r3, 11f)
+	bl	.raw_local_irq_restore
 	b	11f
 
 /* Here we have a page fault that hash_page can't handle. */
@@ -1477,6 +1506,10 @@ _INIT_STATIC(start_here_multiplatform)
 	addi	r2,r2,0x4000
 	add	r2,r2,r26
 
+	/* Set initial ptr to current */
+	LOAD_REG_IMMEDIATE(r4, init_task)
+	std	r4,PACACURRENT(r13)
+
 	/* Do very early kernel initializations, including initial hash table,
 	 * stab and slb setup before we turn on relocation.	*/
 
@@ -1505,10 +1538,6 @@ _INIT_GLOBAL(start_here_common)
 	li	r0,0
 	stdu	r0,-STACK_FRAME_OVERHEAD(r1)
 
-	/* ptr to current */
-	LOAD_REG_IMMEDIATE(r4, init_task)
-	std	r4,PACACURRENT(r13)
-
 	/* Load the TOC */
 	ld	r2,PACATOC(r13)
 	std	r1,PACAKSAVE(r13)
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index ba9393f8e77..aefafc6330c 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -56,8 +56,17 @@
  * is necessary since the MMU is always on, for Book-E parts, and the stacks
  * are offset from KERNELBASE.
  *
+ * There is some space optimization to be had here if desired.  However
+ * to allow for a common kernel with support for debug exceptions either
+ * going to critical or their own debug level we aren't currently
+ * providing configurations that micro-optimize space usage.
  */
-#define BOOKE_EXCEPTION_STACK_SIZE	(8192)
+#ifdef CONFIG_44x
+#define NUM_EXCEPTION_LVLS	2
+#else
+#define NUM_EXCEPTION_LVLS	3
+#endif
+#define BOOKE_EXCEPTION_STACK_SIZE	(4096 * NUM_EXCEPTION_LVLS)
 
 /* CRIT_SPRG only used in critical exception handling */
 #define CRIT_SPRG	SPRN_SPRG2
@@ -68,7 +77,7 @@
 #define CRIT_STACK_TOP		(exception_stack_top)
 
 /* only on e200 for now */
-#define DEBUG_STACK_TOP		(exception_stack_top - 4096)
+#define DEBUG_STACK_TOP		(exception_stack_top - 8192)
 #define DEBUG_SPRG		SPRN_SPRG6W
 
 #ifdef CONFIG_SMP
@@ -212,9 +221,8 @@ label:
  * save (and later restore) the MSR via SPRN_CSRR1, which will still have
  * the MSR_DE bit set.
  */
-#ifdef CONFIG_E200
-#define DEBUG_EXCEPTION							      \
-	START_EXCEPTION(Debug);						      \
+#define DEBUG_DEBUG_EXCEPTION						      \
+	START_EXCEPTION(DebugDebug);					      \
 	DEBUG_EXCEPTION_PROLOG;						      \
 									      \
 	/*								      \
@@ -234,8 +242,8 @@ label:
 	cmplw	r12,r10;						      \
 	blt+	2f;			/* addr below exception vectors */    \
 									      \
-	lis	r10,Debug@h;						      \
-	ori	r10,r10,Debug@l;					      \
+	lis	r10,DebugDebug@h;					      \
+	ori	r10,r10,DebugDebug@l;					      \
 	cmplw	r12,r10;						      \
 	bgt+	2f;			/* addr above exception vectors */    \
 									      \
@@ -265,9 +273,9 @@ label:
 2:	mfspr	r4,SPRN_DBSR;						      \
 	addi	r3,r1,STACK_FRAME_OVERHEAD;				      \
 	EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)
-#else
-#define DEBUG_EXCEPTION							      \
-	START_EXCEPTION(Debug);						      \
+
+#define DEBUG_CRIT_EXCEPTION						      \
+	START_EXCEPTION(DebugCrit);					      \
 	CRITICAL_EXCEPTION_PROLOG;					      \
 									      \
 	/*								      \
@@ -287,8 +295,8 @@ label:
 	cmplw	r12,r10;						      \
 	blt+	2f;			/* addr below exception vectors */    \
 									      \
-	lis	r10,Debug@h;						      \
-	ori	r10,r10,Debug@l;					      \
+	lis	r10,DebugCrit@h;						      \
+	ori	r10,r10,DebugCrit@l;					      \
 	cmplw	r12,r10;						      \
 	bgt+	2f;			/* addr above exception vectors */    \
 									      \
@@ -318,7 +326,6 @@ label:
 2:	mfspr	r4,SPRN_DBSR;						      \
 	addi	r3,r1,STACK_FRAME_OVERHEAD;				      \
 	EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
-#endif
 
 #define INSTRUCTION_STORAGE_EXCEPTION					      \
 	START_EXCEPTION(InstructionStorage)				      \
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index d9cc2c288d9..4ff74414356 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -68,7 +68,9 @@ _ENTRY(_start);
 	mr	r29,r5
 	mr	r28,r6
 	mr	r27,r7
+	li	r25,0		/* phys kernel start (low) */
 	li	r24,0		/* CPU number */
+	li	r23,0		/* phys kernel start (high) */
 
 /* We try to not make any assumptions about how the boot loader
  * setup or used the TLBs.  We invalidate all mappings from the
@@ -167,7 +169,28 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	mtspr	SPRN_MAS0,r7
 	tlbre
 
-	/* Just modify the entry ID, EPN and RPN for the temp mapping */
+	/* grab and fixup the RPN */
+	mfspr	r6,SPRN_MAS1	/* extract MAS1[SIZE] */
+	rlwinm	r6,r6,25,27,30
+	li	r8,-1
+	addi	r6,r6,10
+	slw	r6,r8,r6	/* convert to mask */
+
+	bl	1f		/* Find our address */
+1:	mflr	r7
+
+	mfspr	r8,SPRN_MAS3
+#ifdef CONFIG_PHYS_64BIT
+	mfspr	r23,SPRN_MAS7
+#endif
+	and	r8,r6,r8
+	subfic	r9,r6,-4096
+	and	r9,r9,r7
+
+	or	r25,r8,r9
+	ori	r8,r25,(MAS3_SX|MAS3_SW|MAS3_SR)
+
+	/* Just modify the entry ID and EPN for the temp mapping */
 	lis	r7,0x1000	/* Set MAS0(TLBSEL) = 1 */
 	rlwimi	r7,r5,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r5) */
 	mtspr	SPRN_MAS0,r7
@@ -177,12 +200,10 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	ori	r6,r6,(MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
 	mtspr	SPRN_MAS1,r6
 	mfspr	r6,SPRN_MAS2
-	lis	r7,PHYSICAL_START@h
+	li	r7,0		/* temp EPN = 0 */
 	rlwimi	r7,r6,0,20,31
 	mtspr	SPRN_MAS2,r7
-	mfspr	r6,SPRN_MAS3
-	rlwimi	r7,r6,0,20,31
-	mtspr	SPRN_MAS3,r7
+	mtspr	SPRN_MAS3,r8
 	tlbwe
 
 	xori	r6,r4,1
@@ -232,8 +253,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	ori	r6,r6,PAGE_OFFSET@l
 	rlwimi	r6,r7,0,20,31
 	mtspr	SPRN_MAS2,r6
-	li	r7,(MAS3_SX|MAS3_SW|MAS3_SR)
-	mtspr	SPRN_MAS3,r7
+	mtspr	SPRN_MAS3,r8
 	tlbwe
 
 /* 7. Jump to KERNELBASE mapping */
@@ -283,7 +303,10 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	SET_IVOR(12, WatchdogTimer);
 	SET_IVOR(13, DataTLBError);
 	SET_IVOR(14, InstructionTLBError);
-	SET_IVOR(15, Debug);
+	SET_IVOR(15, DebugDebug);
+#if defined(CONFIG_E500)
+	SET_IVOR(15, DebugCrit);
+#endif
 	SET_IVOR(32, SPEUnavailable);
 	SET_IVOR(33, SPEFloatingPointData);
 	SET_IVOR(34, SPEFloatingPointRound);
@@ -718,7 +741,10 @@ interrupt_base:
 
 
 	/* Debug Interrupt */
-	DEBUG_EXCEPTION
+	DEBUG_DEBUG_EXCEPTION
+#if defined(CONFIG_E500)
+	DEBUG_CRIT_EXCEPTION
+#endif
 
 /*
  * Local functions
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index 2f50bb5d00f..9971159c804 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -183,7 +183,7 @@ static int ibmebus_create_devices(const struct of_device_id *matches)
 		ret = ibmebus_create_device(child);
 		if (ret) {
 			printk(KERN_ERR "%s: failed to create device (%i)",
-			       __FUNCTION__, ret);
+			       __func__, ret);
 			of_node_put(child);
 			break;
 		}
@@ -269,7 +269,7 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus,
 	if (bus_find_device(&ibmebus_bus_type, NULL, path,
 			    ibmebus_match_path)) {
 		printk(KERN_WARNING "%s: %s has already been probed\n",
-		       __FUNCTION__, path);
+		       __func__, path);
 		rc = -EEXIST;
 		goto out;
 	}
@@ -279,7 +279,7 @@ static ssize_t ibmebus_store_probe(struct bus_type *bus,
 		of_node_put(dn);
 	} else {
 		printk(KERN_WARNING "%s: no such device node: %s\n",
-		       __FUNCTION__, path);
+		       __func__, path);
 		rc = -ENODEV;
 	}
 
@@ -308,7 +308,7 @@ static ssize_t ibmebus_store_remove(struct bus_type *bus,
 		return count;
 	} else {
 		printk(KERN_WARNING "%s: %s not on the bus\n",
-		       __FUNCTION__, path);
+		       __func__, path);
 
 		kfree(path);
 		return -ENODEV;
@@ -337,14 +337,14 @@ static int __init ibmebus_bus_init(void)
 	err = of_bus_type_init(&ibmebus_bus_type, "ibmebus");
 	if (err) {
 		printk(KERN_ERR "%s: failed to register IBM eBus.\n",
-		       __FUNCTION__);
+		       __func__);
 		return err;
 	}
 
 	err = device_register(&ibmebus_bus_device);
 	if (err) {
 		printk(KERN_WARNING "%s: device_register returned %i\n",
-		       __FUNCTION__, err);
+		       __func__, err);
 		bus_unregister(&ibmebus_bus_type);
 
 		return err;
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 8f1f4e539c4..0c663669bc3 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -520,7 +520,7 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name)
 	unsigned int order;
 
 	if (!tbl || !tbl->it_map) {
-		printk(KERN_ERR "%s: expected TCE map for %s\n", __FUNCTION__,
+		printk(KERN_ERR "%s: expected TCE map for %s\n", __func__,
 				node_name);
 		return;
 	}
@@ -530,7 +530,7 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name)
 	for (i = 0; i < (tbl->it_size/64); i++) {
 		if (tbl->it_map[i] != 0) {
 			printk(KERN_WARNING "%s: Unexpected TCEs for %s\n",
-				__FUNCTION__, node_name);
+				__func__, node_name);
 			break;
 		}
 	}
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 292163f5b39..425616f92d1 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -114,7 +114,7 @@ static inline void set_soft_enabled(unsigned long enable)
 	: : "r" (enable), "i" (offsetof(struct paca_struct, soft_enabled)));
 }
 
-void local_irq_restore(unsigned long en)
+void raw_local_irq_restore(unsigned long en)
 {
 	/*
 	 * get_paca()->soft_enabled = en;
@@ -174,6 +174,7 @@ void local_irq_restore(unsigned long en)
 
 	__hard_irq_enable();
 }
+EXPORT_SYMBOL(raw_local_irq_restore);
 #endif /* CONFIG_PPC64 */
 
 int show_interrupts(struct seq_file *p, void *v)
@@ -310,8 +311,21 @@ void do_IRQ(struct pt_regs *regs)
 				handler = &__do_IRQ;
 			irqtp->task = curtp->task;
 			irqtp->flags = 0;
+
+			/* Copy the softirq bits in preempt_count so that the
+			 * softirq checks work in the hardirq context.
+			 */
+			irqtp->preempt_count =
+				(irqtp->preempt_count & ~SOFTIRQ_MASK) |
+				(curtp->preempt_count & SOFTIRQ_MASK);
+
 			call_handle_irq(irq, desc, irqtp, handler);
 			irqtp->task = NULL;
+
+
+			/* Set any flag that may have been set on the
+			 * alternate stack
+			 */
 			if (irqtp->flags)
 				set_bits(irqtp->flags, &curtp->flags);
 		} else
@@ -357,7 +371,7 @@ void irq_ctx_init(void)
 		memset((void *)softirq_ctx[i], 0, THREAD_SIZE);
 		tp = softirq_ctx[i];
 		tp->cpu = i;
-		tp->preempt_count = SOFTIRQ_OFFSET;
+		tp->preempt_count = 0;
 
 		memset((void *)hardirq_ctx[i], 0, THREAD_SIZE);
 		tp = hardirq_ctx[i];
diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c
index ee172aa42aa..289af348978 100644
--- a/arch/powerpc/kernel/isa-bridge.c
+++ b/arch/powerpc/kernel/isa-bridge.c
@@ -80,13 +80,13 @@ static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
 	 *			(size depending on dev->n_addr_cells)
 	 *   cell 5:		the size of the range
 	 */
-	if ((range->isa_addr.a_hi && ISA_SPACE_MASK) != ISA_SPACE_IO) {
+	if ((range->isa_addr.a_hi & ISA_SPACE_MASK) != ISA_SPACE_IO) {
 		range++;
 		rlen -= sizeof(struct isa_range);
 		if (rlen < sizeof(struct isa_range))
 			goto inval_range;
 	}
-	if ((range->isa_addr.a_hi && ISA_SPACE_MASK) != ISA_SPACE_IO)
+	if ((range->isa_addr.a_hi & ISA_SPACE_MASK) != ISA_SPACE_IO)
 		goto inval_range;
 
 	isa_addr = range->isa_addr.a_lo;
@@ -99,7 +99,7 @@ static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
 	 */
 	if ((pci_addr != 0) || (isa_addr != 0)) {
 		printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
-		       __FUNCTION__);
+		       __func__);
 		return;
 	}
 
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index dcb89a88df4..1ffacc698ff 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -226,7 +226,7 @@ static void parse_system_parameter_string(struct seq_file *m)
 	unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 	if (!local_buffer) {
 		printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
-		       __FILE__, __FUNCTION__, __LINE__);
+		       __FILE__, __func__, __LINE__);
 		return;
 	}
 
@@ -243,14 +243,14 @@ static void parse_system_parameter_string(struct seq_file *m)
 	if (call_status != 0) {
 		printk(KERN_INFO
 		       "%s %s Error calling get-system-parameter (0x%x)\n",
-		       __FILE__, __FUNCTION__, call_status);
+		       __FILE__, __func__, call_status);
 	} else {
 		int splpar_strlen;
 		int idx, w_idx;
 		char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
 		if (!workbuffer) {
 			printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
-			       __FILE__, __FUNCTION__, __LINE__);
+			       __FILE__, __func__, __LINE__);
 			kfree(local_buffer);
 			return;
 		}
@@ -484,10 +484,10 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 	current_weight = (resource >> 5 * 8) & 0xFF;
 
 	pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
-		 __FUNCTION__, current_entitled, current_weight);
+		 __func__, current_entitled, current_weight);
 
 	pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
-		 __FUNCTION__, *new_entitled_ptr, *new_weight_ptr);
+		 __func__, *new_entitled_ptr, *new_weight_ptr);
 
 	retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
 				    *new_weight_ptr);
@@ -502,7 +502,7 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
 		retval = -EINVAL;
 	} else {
 		printk(KERN_WARNING "%s: received unknown hv return code %ld",
-		       __FUNCTION__, retval);
+		       __func__, retval);
 		retval = -EIO;
 	}
 
diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index c0c8e8c3ced..2d202f274e7 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -12,8 +12,9 @@
 #include <linux/kexec.h>
 #include <linux/reboot.h>
 #include <linux/threads.h>
+#include <linux/lmb.h>
 #include <asm/machdep.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 55f1a25085c..ac163bd46cf 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -15,7 +15,6 @@
 #include <asm/ptrace.h>
 #include <asm/page.h>
 #include <asm/lppaca.h>
-#include <asm/iseries/it_lp_reg_save.h>
 #include <asm/paca.h>
 #include <asm/mmu.h>
 
@@ -25,13 +24,13 @@
 extern unsigned long __toc_start;
 
 /*
- * iSeries structure which the hypervisor knows about - this structure
+ * The structure which the hypervisor knows about - this structure
  * should not cross a page boundary.  The vpa_init/register_vpa call
  * is now known to fail if the lppaca structure crosses a page
- * boundary.  The lppaca is also used on POWER5 pSeries boxes.  The
- * lppaca is 640 bytes long, and cannot readily change since the
- * hypervisor knows its layout, so a 1kB alignment will suffice to
- * ensure that it doesn't cross a page boundary.
+ * boundary.  The lppaca is also used on legacy iSeries and POWER5
+ * pSeries boxes.  The lppaca is 640 bytes long, and cannot readily
+ * change since the hypervisor knows its layout, so a 1kB alignment
+ * will suffice to ensure that it doesn't cross a page boundary.
  */
 struct lppaca lppaca[] = {
 	[0 ... (NR_CPUS-1)] = {
@@ -66,32 +65,17 @@ struct slb_shadow slb_shadow[] __cacheline_aligned = {
  * processors.  The processor VPD array needs one entry per physical
  * processor (not thread).
  */
-#define PACA_INIT_COMMON(number)					    \
+#define PACA_INIT(number)						    \
+{									    \
 	.lppaca_ptr = &lppaca[number],					    \
 	.lock_token = 0x8000,						    \
 	.paca_index = (number),		/* Paca Index */		    \
 	.kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL,		    \
 	.hw_cpu_id = 0xffff,						    \
-	.slb_shadow_ptr = &slb_shadow[number],
-
-#ifdef CONFIG_PPC_ISERIES
-#define PACA_INIT_ISERIES(number)					    \
-	.reg_save_ptr = &iseries_reg_save[number],
-
-#define PACA_INIT(number)						    \
-{									    \
-	PACA_INIT_COMMON(number)					    \
-	PACA_INIT_ISERIES(number)					    \
+	.slb_shadow_ptr = &slb_shadow[number],				    \
+	.__current = &init_task,					    \
 }
 
-#else
-#define PACA_INIT(number)						    \
-{									    \
-	PACA_INIT_COMMON(number)					    \
-}
-
-#endif
-
 struct paca_struct paca[] = {
 	PACA_INIT(0),
 #if NR_CPUS > 1
diff --git a/arch/powerpc/kernel/ppc32.h b/arch/powerpc/kernel/ppc32.h
index 90e56277179..fda05e2211d 100644
--- a/arch/powerpc/kernel/ppc32.h
+++ b/arch/powerpc/kernel/ppc32.h
@@ -135,4 +135,6 @@ struct ucontext32 {
 	struct mcontext32	uc_mcontext;
 };
 
+extern int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s);
+
 #endif  /* _PPC64_PPC32_H */
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 65d14e6ddc3..09fcb50c45a 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -44,10 +44,6 @@
 #include <asm/signal.h>
 #include <asm/dcr.h>
 
-#ifdef CONFIG_PPC64
-EXPORT_SYMBOL(local_irq_restore);
-#endif
-
 #ifdef CONFIG_PPC32
 extern void transfer_to_handler(void);
 extern void do_IRQ(struct pt_regs *regs);
@@ -57,7 +53,6 @@ extern void program_check_exception(struct pt_regs *regs);
 extern void single_step_exception(struct pt_regs *regs);
 extern int sys_sigreturn(struct pt_regs *regs);
 
-EXPORT_SYMBOL(empty_zero_page);
 EXPORT_SYMBOL(clear_pages);
 EXPORT_SYMBOL(copy_page);
 EXPORT_SYMBOL(ISA_DMA_THRESHOLD);
@@ -78,6 +73,7 @@ EXPORT_SYMBOL(strncpy);
 EXPORT_SYMBOL(strcat);
 EXPORT_SYMBOL(strlen);
 EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strncmp);
 
 EXPORT_SYMBOL(csum_partial);
 EXPORT_SYMBOL(csum_partial_copy_generic);
@@ -191,3 +187,4 @@ EXPORT_SYMBOL(intercept_table);
 EXPORT_SYMBOL(__mtdcr);
 EXPORT_SYMBOL(__mfdcr);
 #endif
+EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 4ec60552150..703100d5e45 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -868,11 +868,6 @@ int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 	flush_spe_to_thread(current);
 	error = do_execve(filename, (char __user * __user *) a1,
 			  (char __user * __user *) a2, regs);
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 out:
 	return error;
@@ -919,20 +914,6 @@ int validate_sp(unsigned long sp, struct task_struct *p,
 	return valid_irq_stack(sp, p, nbytes);
 }
 
-#ifdef CONFIG_PPC64
-#define MIN_STACK_FRAME	112	/* same as STACK_FRAME_OVERHEAD, in fact */
-#define FRAME_LR_SAVE	2
-#define INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD + 288)
-#define REGS_MARKER	0x7265677368657265ul
-#define FRAME_MARKER	12
-#else
-#define MIN_STACK_FRAME	16
-#define FRAME_LR_SAVE	1
-#define INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define REGS_MARKER	0x72656773ul
-#define FRAME_MARKER	2
-#endif
-
 EXPORT_SYMBOL(validate_sp);
 
 unsigned long get_wchan(struct task_struct *p)
@@ -944,15 +925,15 @@ unsigned long get_wchan(struct task_struct *p)
 		return 0;
 
 	sp = p->thread.ksp;
-	if (!validate_sp(sp, p, MIN_STACK_FRAME))
+	if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))
 		return 0;
 
 	do {
 		sp = *(unsigned long *)sp;
-		if (!validate_sp(sp, p, MIN_STACK_FRAME))
+		if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD))
 			return 0;
 		if (count > 0) {
-			ip = ((unsigned long *)sp)[FRAME_LR_SAVE];
+			ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE];
 			if (!in_sched_functions(ip))
 				return ip;
 		}
@@ -981,12 +962,12 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 	lr = 0;
 	printk("Call Trace:\n");
 	do {
-		if (!validate_sp(sp, tsk, MIN_STACK_FRAME))
+		if (!validate_sp(sp, tsk, STACK_FRAME_OVERHEAD))
 			return;
 
 		stack = (unsigned long *) sp;
 		newsp = stack[0];
-		ip = stack[FRAME_LR_SAVE];
+		ip = stack[STACK_FRAME_LR_SAVE];
 		if (!firstframe || ip != lr) {
 			printk("["REG"] ["REG"] ", sp, ip);
 			print_symbol("%s", ip);
@@ -1000,8 +981,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 		 * See if this is an exception frame.
 		 * We look for the "regshere" marker in the current frame.
 		 */
-		if (validate_sp(sp, tsk, INT_FRAME_SIZE)
-		    && stack[FRAME_MARKER] == REGS_MARKER) {
+		if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE)
+		    && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) {
 			struct pt_regs *regs = (struct pt_regs *)
 				(sp + STACK_FRAME_OVERHEAD);
 			printk("--- Exception: %lx", regs->trap);
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index eac97f48b9b..3bfe7837e82 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -31,10 +31,10 @@
 #include <linux/kexec.h>
 #include <linux/debugfs.h>
 #include <linux/irq.h>
+#include <linux/lmb.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
-#include <asm/lmb.h>
 #include <asm/page.h>
 #include <asm/processor.h>
 #include <asm/irq.h>
@@ -51,6 +51,7 @@
 #include <asm/machdep.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/pci-bridge.h>
+#include <asm/phyp_dump.h>
 #include <asm/kexec.h>
 
 #ifdef DEBUG
@@ -436,7 +437,7 @@ early_param("mem", early_parse_mem);
  * The device tree may be allocated beyond our memory limit, or inside the
  * crash kernel region for kdump. If so, move it out of the way.
  */
-static void move_device_tree(void)
+static void __init move_device_tree(void)
 {
 	unsigned long start, size;
 	void *p;
@@ -1040,6 +1041,87 @@ static void __init early_reserve_mem(void)
 #endif
 }
 
+#ifdef CONFIG_PHYP_DUMP
+/**
+ * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg
+ *
+ * Function to find the largest size we need to reserve
+ * during early boot process.
+ *
+ * It either looks for boot param and returns that OR
+ * returns larger of 256 or 5% rounded down to multiples of 256MB.
+ *
+ */
+static inline unsigned long phyp_dump_calculate_reserve_size(void)
+{
+	unsigned long tmp;
+
+	if (phyp_dump_info->reserve_bootvar)
+		return phyp_dump_info->reserve_bootvar;
+
+	/* divide by 20 to get 5% of value */
+	tmp = lmb_end_of_DRAM();
+	do_div(tmp, 20);
+
+	/* round it down in multiples of 256 */
+	tmp = tmp & ~0x0FFFFFFFUL;
+
+	return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END);
+}
+
+/**
+ * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory
+ *
+ * This routine may reserve memory regions in the kernel only
+ * if the system is supported and a dump was taken in last
+ * boot instance or if the hardware is supported and the
+ * scratch area needs to be setup. In other instances it returns
+ * without reserving anything. The memory in case of dump being
+ * active is freed when the dump is collected (by userland tools).
+ */
+static void __init phyp_dump_reserve_mem(void)
+{
+	unsigned long base, size;
+	unsigned long variable_reserve_size;
+
+	if (!phyp_dump_info->phyp_dump_configured) {
+		printk(KERN_ERR "Phyp-dump not supported on this hardware\n");
+		return;
+	}
+
+	if (!phyp_dump_info->phyp_dump_at_boot) {
+		printk(KERN_INFO "Phyp-dump disabled at boot time\n");
+		return;
+	}
+
+	variable_reserve_size = phyp_dump_calculate_reserve_size();
+
+	if (phyp_dump_info->phyp_dump_is_active) {
+		/* Reserve *everything* above RMR.Area freed by userland tools*/
+		base = variable_reserve_size;
+		size = lmb_end_of_DRAM() - base;
+
+		/* XXX crashed_ram_end is wrong, since it may be beyond
+		 * the memory_limit, it will need to be adjusted. */
+		lmb_reserve(base, size);
+
+		phyp_dump_info->init_reserve_start = base;
+		phyp_dump_info->init_reserve_size = size;
+	} else {
+		size = phyp_dump_info->cpu_state_size +
+			phyp_dump_info->hpte_region_size +
+			variable_reserve_size;
+		base = lmb_end_of_DRAM() - size;
+		lmb_reserve(base, size);
+		phyp_dump_info->init_reserve_start = base;
+		phyp_dump_info->init_reserve_size = size;
+	}
+}
+#else
+static inline void __init phyp_dump_reserve_mem(void) {}
+#endif /* CONFIG_PHYP_DUMP  && CONFIG_PPC_RTAS */
+
+
 void __init early_init_devtree(void *params)
 {
 	DBG(" -> early_init_devtree(%p)\n", params);
@@ -1052,6 +1134,11 @@ void __init early_init_devtree(void *params)
 	of_scan_flat_dt(early_init_dt_scan_rtas, NULL);
 #endif
 
+#ifdef CONFIG_PHYP_DUMP
+	/* scan tree to see if dump occured during last boot */
+	of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL);
+#endif
+
 	/* Retrieve various informations from the /chosen node of the
 	 * device-tree, including the platform type, initrd location and
 	 * size, TCE reserve, and more ...
@@ -1072,6 +1159,7 @@ void __init early_init_devtree(void *params)
 	reserve_kdump_trampoline();
 	reserve_crashkernel();
 	early_reserve_mem();
+	phyp_dump_reserve_mem();
 
 	lmb_enforce_memory_limit(memory_limit);
 	lmb_analyze();
@@ -1244,12 +1332,14 @@ EXPORT_SYMBOL(of_node_put);
  */
 void of_attach_node(struct device_node *np)
 {
-	write_lock(&devtree_lock);
+	unsigned long flags;
+
+	write_lock_irqsave(&devtree_lock, flags);
 	np->sibling = np->parent->child;
 	np->allnext = allnodes;
 	np->parent->child = np;
 	allnodes = np;
-	write_unlock(&devtree_lock);
+	write_unlock_irqrestore(&devtree_lock, flags);
 }
 
 /*
@@ -1260,8 +1350,9 @@ void of_attach_node(struct device_node *np)
 void of_detach_node(struct device_node *np)
 {
 	struct device_node *parent;
+	unsigned long flags;
 
-	write_lock(&devtree_lock);
+	write_lock_irqsave(&devtree_lock, flags);
 
 	parent = np->parent;
 	if (!parent)
@@ -1292,7 +1383,7 @@ void of_detach_node(struct device_node *np)
 	of_node_set_flag(np, OF_DETACHED);
 
 out_unlock:
-	write_unlock(&devtree_lock);
+	write_unlock_irqrestore(&devtree_lock, flags);
 }
 
 #ifdef CONFIG_PPC_PSERIES
@@ -1373,20 +1464,21 @@ __initcall(prom_reconfig_setup);
 int prom_add_property(struct device_node* np, struct property* prop)
 {
 	struct property **next;
+	unsigned long flags;
 
 	prop->next = NULL;	
-	write_lock(&devtree_lock);
+	write_lock_irqsave(&devtree_lock, flags);
 	next = &np->properties;
 	while (*next) {
 		if (strcmp(prop->name, (*next)->name) == 0) {
 			/* duplicate ! don't insert it */
-			write_unlock(&devtree_lock);
+			write_unlock_irqrestore(&devtree_lock, flags);
 			return -1;
 		}
 		next = &(*next)->next;
 	}
 	*next = prop;
-	write_unlock(&devtree_lock);
+	write_unlock_irqrestore(&devtree_lock, flags);
 
 #ifdef CONFIG_PROC_DEVICETREE
 	/* try to add to proc as well if it was initialized */
@@ -1406,9 +1498,10 @@ int prom_add_property(struct device_node* np, struct property* prop)
 int prom_remove_property(struct device_node *np, struct property *prop)
 {
 	struct property **next;
+	unsigned long flags;
 	int found = 0;
 
-	write_lock(&devtree_lock);
+	write_lock_irqsave(&devtree_lock, flags);
 	next = &np->properties;
 	while (*next) {
 		if (*next == prop) {
@@ -1421,7 +1514,7 @@ int prom_remove_property(struct device_node *np, struct property *prop)
 		}
 		next = &(*next)->next;
 	}
-	write_unlock(&devtree_lock);
+	write_unlock_irqrestore(&devtree_lock, flags);
 
 	if (!found)
 		return -ENODEV;
@@ -1447,9 +1540,10 @@ int prom_update_property(struct device_node *np,
 			 struct property *oldprop)
 {
 	struct property **next;
+	unsigned long flags;
 	int found = 0;
 
-	write_lock(&devtree_lock);
+	write_lock_irqsave(&devtree_lock, flags);
 	next = &np->properties;
 	while (*next) {
 		if (*next == oldprop) {
@@ -1463,7 +1557,7 @@ int prom_update_property(struct device_node *np,
 		}
 		next = &(*next)->next;
 	}
-	write_unlock(&devtree_lock);
+	write_unlock_irqrestore(&devtree_lock, flags);
 
 	if (!found)
 		return -ENODEV;
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 5ab4c8466cc..6d6df1e6032 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2240,6 +2240,14 @@ static void __init fixup_device_tree_efika(void)
 	if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
 		prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
 
+	/* CODEGEN,description is exposed in /proc/cpuinfo so
+	   fix that too */
+	rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
+	if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
+		prom_setprop(node, "/", "CODEGEN,description",
+			     "Efika 5200B PowerPC System",
+			     sizeof("Efika 5200B PowerPC System"));
+
 	/* Fixup bestcomm interrupts property */
 	node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
 	if (PHANDLE_VALID(node)) {
diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c
index 4c1de6af4c0..9d30e10970a 100644
--- a/arch/powerpc/kernel/ptrace32.c
+++ b/arch/powerpc/kernel/ptrace32.c
@@ -29,12 +29,15 @@
 #include <linux/security.h>
 #include <linux/signal.h>
 #include <linux/compat.h>
+#include <linux/elf.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
 
+#include "ppc32.h"
+
 /*
  * does not yet catch signals sent when the child dies.
  * in exit.c or in signal.c.
@@ -64,6 +67,27 @@ static long compat_ptrace_old(struct task_struct *child, long request,
 	return -EPERM;
 }
 
+static int compat_ptrace_getsiginfo(struct task_struct *child, compat_siginfo_t __user *data)
+{
+	siginfo_t lastinfo;
+	int error = -ESRCH;
+
+	read_lock(&tasklist_lock);
+	if (likely(child->sighand != NULL)) {
+		error = -EINVAL;
+		spin_lock_irq(&child->sighand->siglock);
+		if (likely(child->last_siginfo != NULL)) {
+			lastinfo = *child->last_siginfo;
+			error = 0;
+		}
+		spin_unlock_irq(&child->sighand->siglock);
+	}
+	read_unlock(&tasklist_lock);
+	if (!error)
+		return copy_siginfo_to_user32(data, &lastinfo);
+	return error;
+}
+
 long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 			compat_ulong_t caddr, compat_ulong_t cdata)
 {
@@ -282,6 +306,9 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 			0, PT_REGS_COUNT * sizeof(compat_long_t),
 			compat_ptr(data));
 
+	case PTRACE_GETSIGINFO:
+		return compat_ptrace_getsiginfo(child, compat_ptr(data));
+
 	case PTRACE_GETFPREGS:
 	case PTRACE_SETFPREGS:
 	case PTRACE_GETVRREGS:
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index fe8d9514689..34843c31841 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -22,6 +22,7 @@
 #include <linux/smp.h>
 #include <linux/completion.h>
 #include <linux/cpumask.h>
+#include <linux/lmb.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
@@ -33,7 +34,6 @@
 #include <asm/system.h>
 #include <asm/delay.h>
 #include <asm/uaccess.h>
-#include <asm/lmb.h>
 #include <asm/udbg.h>
 #include <asm/syscalls.h>
 #include <asm/smp.h>
@@ -506,7 +506,7 @@ int rtas_error_rc(int rtas_rc)
 			break;
 		default:
 			printk(KERN_ERR "%s: unexpected RTAS error %d\n",
-					__FUNCTION__, rtas_rc);
+					__func__, rtas_rc);
 			rc = -ERANGE;
 			break;
 	}
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index 538baf46f15..627f126d184 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -807,7 +807,7 @@ int __init rtas_flash_init(void)
 				rtas_block_ctor);
 	if (!flash_block_cache) {
 		printk(KERN_ERR "%s: failed to create block cache\n",
-				__FUNCTION__);
+				__func__);
 		rc = -ENOMEM;
 		goto cleanup;
 	}
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index 433a0a0949f..3ab88a9dc70 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -56,21 +56,6 @@ static inline int config_access_valid(struct pci_dn *dn, int where)
 	return 0;
 }
 
-static int of_device_available(struct device_node * dn)
-{
-        const char *status;
-
-        status = of_get_property(dn, "status", NULL);
-
-        if (!status)
-                return 1;
-
-        if (!strcmp(status, "okay"))
-                return 1;
-
-        return 0;
-}
-
 int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val)
 {
 	int returnval = -1;
@@ -117,7 +102,7 @@ static int rtas_pci_read_config(struct pci_bus *bus,
 	for (dn = busdn->child; dn; dn = dn->sibling) {
 		struct pci_dn *pdn = PCI_DN(dn);
 		if (pdn && pdn->devfn == devfn
-		    && of_device_available(dn))
+		    && of_device_is_available(dn))
 			return rtas_read_config(pdn, where, size, val);
 	}
 
@@ -164,7 +149,7 @@ static int rtas_pci_write_config(struct pci_bus *bus,
 	for (dn = busdn->child; dn; dn = dn->sibling) {
 		struct pci_dn *pdn = PCI_DN(dn);
 		if (pdn && pdn->devfn == devfn
-		    && of_device_available(dn))
+		    && of_device_is_available(dn))
 			return rtas_write_config(pdn, where, size, val);
 	}
 	return PCIBIOS_DEVICE_NOT_FOUND;
@@ -326,7 +311,7 @@ int pcibios_remove_root_bus(struct pci_controller *phb)
 
 	res = b->resource[0];
 	if (!res->flags) {
-		printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__,
+		printk(KERN_ERR "%s: no IO resource for PHB %s\n", __func__,
 				b->name);
 		return 1;
 	}
@@ -334,13 +319,13 @@ int pcibios_remove_root_bus(struct pci_controller *phb)
 	rc = pcibios_unmap_io_space(b);
 	if (rc) {
 		printk(KERN_ERR "%s: failed to unmap IO on bus %s\n",
-			__FUNCTION__, b->name);
+			__func__, b->name);
 		return 1;
 	}
 
 	if (release_resource(res)) {
 		printk(KERN_ERR "%s: failed to release IO on bus %s\n",
-				__FUNCTION__, b->name);
+				__func__, b->name);
 		return 1;
 	}
 
@@ -348,13 +333,13 @@ int pcibios_remove_root_bus(struct pci_controller *phb)
 		res = b->resource[i];
 		if (!res->flags && i == 0) {
 			printk(KERN_ERR "%s: no MEM resource for PHB %s\n",
-				__FUNCTION__, b->name);
+				__func__, b->name);
 			return 1;
 		}
 		if (res->flags && release_resource(res)) {
 			printk(KERN_ERR
 			       "%s: failed to release IO %d on bus %s\n",
-				__FUNCTION__, i, b->name);
+				__func__, i, b->name);
 			return 1;
 		}
 	}
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 6adb5a1e98b..db540eab09f 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -34,6 +34,7 @@
 #include <linux/serial_8250.h>
 #include <linux/debugfs.h>
 #include <linux/percpu.h>
+#include <linux/lmb.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>
@@ -56,7 +57,6 @@
 #include <asm/cache.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
-#include <asm/lmb.h>
 #include <asm/xmon.h>
 #include <asm/cputhreads.h>
 
@@ -167,6 +167,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	unsigned short min;
 
 	if (cpu_id == NR_CPUS) {
+		struct device_node *root;
+		const char *model = NULL;
 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
 		unsigned long bogosum = 0;
 		int i;
@@ -178,6 +180,13 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
 		if (ppc_md.name)
 			seq_printf(m, "platform\t: %s\n", ppc_md.name);
+		root = of_find_node_by_path("/");
+		if (root)
+			model = of_get_property(root, "model", NULL);
+		if (model)
+			seq_printf(m, "model\t\t: %s\n", model);
+		of_node_put(root);
+
 		if (ppc_md.show_cpuinfo != NULL)
 			ppc_md.show_cpuinfo(m);
 
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 06d918d94dd..36f6779c88d 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -164,6 +164,18 @@ int __init ppc_setup_l2cr(char *str)
 }
 __setup("l2cr=", ppc_setup_l2cr);
 
+/* Checks "l3cr=xxxx" command-line option */
+int __init ppc_setup_l3cr(char *str)
+{
+	if (cpu_has_feature(CPU_FTR_L3CR)) {
+		unsigned long val = simple_strtoul(str, NULL, 0);
+		printk(KERN_INFO "l3cr set to %lx\n", val);
+		_set_L3CR(val);		/* and enable it */
+	}
+	return 1;
+}
+__setup("l3cr=", ppc_setup_l3cr);
+
 #ifdef CONFIG_GENERIC_NVRAM
 
 /* Generic nvram hooks used by drivers/char/gen_nvram.c */
@@ -269,7 +281,7 @@ void __init setup_arch(char **cmdline_p)
 	if (ppc_md.panic)
 		setup_panic();
 
-	init_mm.start_code = PAGE_OFFSET;
+	init_mm.start_code = (unsigned long)_stext;
 	init_mm.end_code = (unsigned long) _etext;
 	init_mm.end_data = (unsigned long) _edata;
 	init_mm.brk = klimit;
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 3b1529c103e..31ada9fdfc5 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -33,6 +33,8 @@
 #include <linux/serial_8250.h>
 #include <linux/bootmem.h>
 #include <linux/pci.h>
+#include <linux/lockdep.h>
+#include <linux/lmb.h>
 #include <asm/io.h>
 #include <asm/kdump.h>
 #include <asm/prom.h>
@@ -55,7 +57,6 @@
 #include <asm/cache.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
-#include <asm/lmb.h>
 #include <asm/firmware.h>
 #include <asm/xmon.h>
 #include <asm/udbg.h>
@@ -178,6 +179,9 @@ void __init early_setup(unsigned long dt_ptr)
 	/* Enable early debugging if any specified (see udbg.h) */
 	udbg_early_init();
 
+	/* Initialize lockdep early or else spinlocks will blow */
+	lockdep_init();
+
  	DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr);
 
 	/*
@@ -510,7 +514,7 @@ void __init setup_arch(char **cmdline_p)
 	if (ppc_md.panic)
 		setup_panic();
 
-	init_mm.start_code = PAGE_OFFSET;
+	init_mm.start_code = (unsigned long)_stext;
 	init_mm.end_code = (unsigned long) _etext;
 	init_mm.end_data = (unsigned long) _edata;
 	init_mm.brk = klimit;
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index d840bc772fd..ad6943468ee 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -621,6 +621,18 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
 
 #define copy_siginfo_to_user	copy_siginfo_to_user32
 
+int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
+{
+	memset(to, 0, sizeof *to);
+
+	if (copy_from_user(to, from, 3*sizeof(int)) ||
+	    copy_from_user(to->_sifields._pad,
+			   from->_sifields._pad, SI_PAD_SIZE32))
+		return -EFAULT;
+
+	return 0;
+}
+
 /*
  * Note: it is necessary to treat pid and sig as unsigned ints, with the
  * corresponding cast to a signed int to insure that the proper conversion
@@ -634,9 +646,10 @@ long compat_sys_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo
 	int ret;
 	mm_segment_t old_fs = get_fs();
 
-	if (copy_from_user (&info, uinfo, 3*sizeof(int)) ||
-	    copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE32))
-		return -EFAULT;
+	ret = copy_siginfo_from_user32(&info, uinfo);
+	if (unlikely(ret))
+		return ret;
+
 	set_fs (KERNEL_DS);
 	/* The __user pointer cast is valid becasuse of the set_fs() */
 	ret = sys_rt_sigqueueinfo((int)pid, (int)sig, (siginfo_t __user *) &info);
diff --git a/arch/powerpc/kernel/stacktrace.c b/arch/powerpc/kernel/stacktrace.c
new file mode 100644
index 00000000000..e3638eeaaae
--- /dev/null
+++ b/arch/powerpc/kernel/stacktrace.c
@@ -0,0 +1,47 @@
+/*
+ * Stack trace utility
+ *
+ * Copyright 2008 Christoph Hellwig, IBM Corp.
+ *
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+#include <asm/ptrace.h>
+#include <asm/asm-offsets.h>
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+	unsigned long sp;
+
+	asm("mr %0,1" : "=r" (sp));
+
+	for (;;) {
+		unsigned long *stack = (unsigned long *) sp;
+		unsigned long newsp, ip;
+
+		if (!validate_sp(sp, current, STACK_FRAME_OVERHEAD))
+			return;
+
+		newsp = stack[0];
+		ip = stack[STACK_FRAME_LR_SAVE];
+
+		if (!trace->skip)
+			trace->entries[trace->nr_entries++] = ip;
+		else
+			trace->skip--;
+
+		if (trace->nr_entries >= trace->max_entries)
+			return;
+
+		sp = newsp;
+	}
+}
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index fee9ee2260b..709f8cb8bfc 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -367,11 +367,6 @@ long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 
 	error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 
-	if (error == 0) {
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
-	}
 	putname(filename);
 
 out:
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index d3437c4c4a6..c21a626af67 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -21,13 +21,14 @@
 #include <linux/elf.h>
 #include <linux/security.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 
 #include <asm/pgtable.h>
 #include <asm/system.h>
 #include <asm/processor.h>
 #include <asm/mmu.h>
 #include <asm/mmu_context.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/machdep.h>
 #include <asm/cputable.h>
 #include <asm/sections.h>
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index f98867252ee..b77f8af7ddd 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -139,7 +139,7 @@ static int vio_bus_remove(struct device *dev)
  */
 int vio_register_driver(struct vio_driver *viodrv)
 {
-	printk(KERN_DEBUG "%s: driver %s registering\n", __FUNCTION__,
+	printk(KERN_DEBUG "%s: driver %s registering\n", __func__,
 		viodrv->driver.name);
 
 	/* fill in 'struct driver' fields */
@@ -184,7 +184,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 	/* we need the 'device_type' property, in order to match with drivers */
 	if (of_node->type == NULL) {
 		printk(KERN_WARNING "%s: node %s missing 'device_type'\n",
-				__FUNCTION__,
+				__func__,
 				of_node->name ? of_node->name : "<unknown>");
 		return NULL;
 	}
@@ -192,7 +192,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 	unit_address = of_get_property(of_node, "reg", NULL);
 	if (unit_address == NULL) {
 		printk(KERN_WARNING "%s: node %s missing 'reg'\n",
-				__FUNCTION__,
+				__func__,
 				of_node->name ? of_node->name : "<unknown>");
 		return NULL;
 	}
@@ -227,7 +227,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 	/* register with generic device framework */
 	if (device_register(&viodev->dev)) {
 		printk(KERN_ERR "%s: failed to register device %s\n",
-				__FUNCTION__, viodev->dev.bus_id);
+				__func__, viodev->dev.bus_id);
 		/* XXX free TCE table */
 		kfree(viodev);
 		return NULL;
@@ -258,7 +258,7 @@ static int __init vio_bus_init(void)
 	err = device_register(&vio_bus_device.dev);
 	if (err) {
 		printk(KERN_WARNING "%s: device_register returned %i\n",
-				__FUNCTION__, err);
+				__func__, err);
 		return err;
 	}
 
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 0afb9e31d2a..0c3000bf8d7 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -1,11 +1,9 @@
 #ifdef CONFIG_PPC64
-#include <asm/page.h>
 #define PROVIDE32(x)	PROVIDE(__unused__##x)
 #else
-#define PAGE_SIZE	4096
-#define KERNELBASE	CONFIG_KERNEL_START
 #define PROVIDE32(x)	PROVIDE(x)
 #endif
+#include <asm/page.h>
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/cache.h>
 
@@ -33,7 +31,7 @@ SECTIONS
  */
 
 	/* Text and gots */
-	.text : {
+	.text : AT(ADDR(.text) - LOAD_OFFSET) {
 		ALIGN_FUNCTION();
 		*(.text.head)
 		_text = .;
@@ -58,7 +56,7 @@ SECTIONS
 	RODATA
 
 	/* Exception & bug tables */
-	__ex_table : {
+	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
 		__start___ex_table = .;
 		*(__ex_table)
 		__stop___ex_table = .;
@@ -74,7 +72,7 @@ SECTIONS
 	. = ALIGN(PAGE_SIZE);
 	__init_begin = .;
 
-	.init.text : {
+	.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
 		_sinittext = .;
 		INIT_TEXT
 		_einittext = .;
@@ -83,11 +81,11 @@ SECTIONS
 	/* .exit.text is discarded at runtime, not link time,
 	 * to deal with references from __bug_table
 	 */
-	.exit.text : {
+	.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
 		EXIT_TEXT
 	}
 
-	.init.data : {
+	.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
 		INIT_DATA
 		__vtop_table_begin = .;
 		*(.vtop_fixup);
@@ -103,19 +101,19 @@ SECTIONS
 	}
 
 	. = ALIGN(16);
-	.init.setup : {
+	.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
 		__setup_start = .;
 		*(.init.setup)
 		__setup_end = .;
 	}
 
-	.initcall.init : {
+	.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
 		__initcall_start = .;
 		INITCALLS
 		__initcall_end = .;
 		}
 
-	.con_initcall.init : {
+	.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
 		__con_initcall_start = .;
 		*(.con_initcall.init)
 		__con_initcall_end = .;
@@ -124,14 +122,14 @@ SECTIONS
 	SECURITY_INIT
 
 	. = ALIGN(8);
-	__ftr_fixup : {
+	__ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
 		__start___ftr_fixup = .;
 		*(__ftr_fixup)
 		__stop___ftr_fixup = .;
 	}
 #ifdef CONFIG_PPC64
 	. = ALIGN(8);
-	__fw_ftr_fixup : {
+	__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
 		__start___fw_ftr_fixup = .;
 		*(__fw_ftr_fixup)
 		__stop___fw_ftr_fixup = .;
@@ -139,14 +137,14 @@ SECTIONS
 #endif
 #ifdef CONFIG_BLK_DEV_INITRD
 	. = ALIGN(PAGE_SIZE);
-	.init.ramfs : {
+	.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
 		__initramfs_start = .;
 		*(.init.ramfs)
 		__initramfs_end = .;
 	}
 #endif
 	. = ALIGN(PAGE_SIZE);
-	.data.percpu : {
+	.data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {
 		__per_cpu_start = .;
 		*(.data.percpu)
 		*(.data.percpu.shared_aligned)
@@ -154,7 +152,7 @@ SECTIONS
 	}
 
 	. = ALIGN(8);
-	.machine.desc : {
+	.machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
 		__machine_desc_start = . ;
 		*(.machine.desc)
 		__machine_desc_end = . ;
@@ -172,25 +170,24 @@ SECTIONS
 	_sdata = .;
 
 #ifdef CONFIG_PPC32
-	.data    :
-	{
+	.data : AT(ADDR(.data) - LOAD_OFFSET) {
 		DATA_DATA
 		*(.sdata)
 		*(.got.plt) *(.got)
 	}
 #else
-	.data : {
+	.data : AT(ADDR(.data) - LOAD_OFFSET) {
 		DATA_DATA
 		*(.data.rel*)
 		*(.toc1)
 		*(.branch_lt)
 	}
 
-	.opd : {
+	.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
 		*(.opd)
 	}
 
-	.got : {
+	.got : AT(ADDR(.got) - LOAD_OFFSET) {
 		__toc_start = .;
 		*(.got)
 		*(.toc)
@@ -207,26 +204,26 @@ SECTIONS
 #else
 	. = ALIGN(16384);
 #endif
-	.data.init_task : {
+	.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
 		*(.data.init_task)
 	}
 
 	. = ALIGN(PAGE_SIZE);
-	.data.page_aligned : {
+	.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
 		*(.data.page_aligned)
 	}
 
-	.data.cacheline_aligned : {
+	.data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
 		*(.data.cacheline_aligned)
 	}
 
 	. = ALIGN(L1_CACHE_BYTES);
-	.data.read_mostly : {
+	.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
 		*(.data.read_mostly)
 	}
 
 	. = ALIGN(PAGE_SIZE);
-	__data_nosave : {
+	.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
 		__nosave_begin = .;
 		*(.data.nosave)
 		. = ALIGN(PAGE_SIZE);
@@ -237,7 +234,7 @@ SECTIONS
  * And finally the bss
  */
 
-	.bss : {
+	.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
 		__bss_start = .;
 		*(.sbss) *(.scommon)
 		*(.dynbss)