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2008-10-09xen: use spin_lock_nest_lock when pinning a pagetableJeremy Fitzhardinge
When pinning/unpinning a pagetable with split pte locks, we can end up holding multiple pte locks at once (we need to hold the locks while there's a pending batched hypercall affecting the pte page). Because all the pte locks are in the same lock class, lockdep thinks that we're potentially taking a lock recursively. This warning is spurious because we always take the pte locks while holding mm->page_table_lock. lockdep now has spin_lock_nest_lock to express this kind of dominant lock use, so use it here so that lockdep knows what's going on. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03xen: clean up x86-64 warningsJeremy Fitzhardinge
There are a couple of Xen features which rely on directly accessing per-cpu data via a segment register, which is not yet available on x86-64. In the meantime, just disable direct access to the vcpu info structure; this leaves some of the code as dead, but it will come to life in time, and the warnings are suppressed. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-30xen: make CONFIG_XEN_SAVE_RESTORE depend on CONFIG_XENChuck Ebbert
Xen options need to depend on XEN. Also, add newline at end of file. Without this patch you need to disable CONFIG_PM in order to disable CPU hotplugging. Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Acked-by Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-23Merge branch 'timers/urgent' into x86/xenIngo Molnar
Conflicts: arch/x86/kernel/process_32.c arch/x86/kernel/process_64.c Manual merge: arch/x86/kernel/smpboot.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-23x86: c1e_idle: don't mark TSC unstable if CPU has invariant TSCAndreas Herrmann
Impact: Functional TSC is marked unstable on AMD family 0x10 and 0x11 CPUs. This would be wrong because for those CPUs "invariant TSC" means: "The TSC counts at the same rate in all P-states, all C states, S0, or S1" (See "Processor BIOS and Kernel Developer's Guides" for those CPUs.) [ tglx: Changed C1E to AMD C1E in the printks to avoid confusion with Intel C1E ] Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-09-23x86: prevent C-states hang on AMD C1E enabled machinesThomas Gleixner
Impact: System hang when AMD C1E machines switch into C2/C3 AMD C1E enabled systems do not work with normal ACPI C-states even if the BIOS is advertising them. Limit the C-states to C1 for the ACPI processor idle code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-09-23x86: prevent stale state of c1e_mask across CPU offline/onlineThomas Gleixner
Impact: hang which happens across CPU offline/online on AMD C1E systems. When a CPU goes offline then the corresponding bit in the broadcast mask is cleared. For AMD C1E enabled CPUs we do not reenable the broadcast when the CPU comes online again as we do not clear the corresponding bit in the c1e_mask, which keeps track which CPUs have been switched to broadcast already. So on those !$@#& machines we never switch back to broadcasting after a CPU offline/online cycle. Clear the bit when the CPU plays dead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-09-21Merge branch 'kvm-updates/2.6.27' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates/2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: ia64: 'struct fdesc' build fix
2008-09-21[MIPS] vmlinux.lds.S: handle .text.*Atsushi Nemoto
The -ffunction-sections puts each text in .text.function_name section. Without this patch, most functions are placed outside _text..._etext area and it breaks show_stacktrace(), etc. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-09-21[MIPS] Fix potential latency problem due to non-atomic cpu_wait.Atsushi Nemoto
If an interrupt happened between checking of NEED_RESCHED and WAIT instruction, adjust EPC to restart from checking of NEED_RESCHED. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-09-21[MIPS] SMTC: Clear TIF_FPUBOUND on clone / fork.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-09-21[MIPS] Fix 64-bit IP checksum codeAtsushi Nemoto
Use unsigned loads to avoid possible misscalculation of IP checksums. This bug was instruced in f761106cd728bcf65b7fe161b10221ee00cf7132 (lmo) / ed99e2bc1dc5dc54eb5a019f4975562dbef20103 (kernel.org). [Original fix by Atsushi. Improved instruction scheduling and fix for unaligned unsigned load by me -- Ralf] Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-09-19KVM: ia64: 'struct fdesc' build fixJes Sorensen
Commit 4611a77 ("[IA64] fix compile failure with non modular builds") introduced struct fdesc into asm/elf.h, which duplicates KVM's definition. Remove the latter to avoid the build error. Signed-off-by: Jes Sorensen <jes@sgi.com> Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2008-09-19Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: completely disable NOPL on 32 bits x86/paravirt: Remove duplicate paravirt_pagetable_setup_{start, done}() xen: fix for xen guest with mem > 3.7G x86: fix possible x86_64 and EFI regression arch/x86/kernel/kdebugfs.c: introduce missing kfree
2008-09-19Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: Fix compile failure with non modular builds powerpc: Holly board needs dtbImage target powerpc: Fix interrupt values for DMA2 in MPC8610 HPCD device tree
2008-09-19Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5255/1: Update jornada ssp to remove build errors/warnings [ARM] omap: back out 'internal_clock' support [ARM] 5249/1: davinci: remove redundant check in davinci_psc_config()
2008-09-19Merge branch 'master' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6: avr32: nmi_enter() without nmi_exit() avr32: fix sys_sync_file_range() call convention avr32: add generic_find_next_le_bit bit function avr32: add .gitignore files atstk1000: fix build breakage with BOARD_ATSTK100X_SW2_CUSTOM=y
2008-09-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Fix SMP bootup with CONFIG_STACK_DEBUG or ftrace. sparc64: Fix OOPS in psycho_pcierr_intr_other().
2008-09-19avr32: nmi_enter() without nmi_exit()Manfred Spraul
While updating the rcu code, I noticed that do_nmi() for AVR32 is odd: There is an nmi_enter() call without an nmi_exit(). This can't be correct, it breaks rcu (at least the preempt version) and lockdep. [haavard.skinnemoen@atmel.com: fixed another case that returned directly] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-09-19avr32: fix sys_sync_file_range() call conventionHans-Christian Egtvedt
On AVR32, all parameters beyond the 5th are passed on the stack. System calls don't use the stack -- they borrow a callee-saved register instead. This means that syscalls that take 6 parameters must be called through a stub that pushes the last parameter on the stack. This patch adds a stub for sync_file_range syscall on AVR32 architecture. Tested with uClibc snapshot. Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-09-19avr32: add generic_find_next_le_bit bit functionHans-Christian Egtvedt
This patch implements the generic_find_next_le_bit bit function for AVR32 architecture. This is used by EXT4 file system. Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-09-19avr32: add .gitignore filesMarkus Heidelberg
Ignore Kernel binaries, kernel/vmlinux.lds and a log file. Signed-off-by: Markus Heidelberg <markus.heidelberg@web.de> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-09-19atstk1000: fix build breakage with BOARD_ATSTK100X_SW2_CUSTOM=yHaavard Skinnemoen
The #ifdef surrounding the code adding the mmc controller had a typo, causing it to be compiled even when mmc was supposed to be disabled. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-09-18[ARM] 5255/1: Update jornada ssp to remove build errors/warningsKristoffer Ericson
* Adds ssp functions into header so we don't get "implicit declaration" error at builtime. * Converts jornada_ssp_start/end functions into voids with proper declarations (to avoid "prototype..." warning). * Sorts include files in alphabetical order * Minor comment changes Signed-off-by: Kristoffer Ericson <Kristoffer.Ericson@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-17[ARM] omap: back out 'internal_clock' supportRussell King
The structures weren't ready for this change: arch/arm/plat-omap/devices.c:320: error: 'struct omap_mmc_conf' has no member named 'internal_clock' arch/arm/plat-omap/devices.c:326: error: implicit declaration of function 'omap_ctrl_readl' arch/arm/plat-omap/devices.c:326: error: 'OMAP2_CONTROL_DEVCONF0' undeclared (first use in this function) arch/arm/plat-omap/devices.c:328: error: implicit declaration of function 'omap_ctrl_writel' Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-17[ARM] 5249/1: davinci: remove redundant check in davinci_psc_config()roelkluin
id is unsigned, check is redundant. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-17Fix compile failure with non modular buildsJames Bottomley
Commit deac93df26b20cf8438339b5935b5f5643bc30c9 ("lib: Correct printk %pF to work on all architectures") broke the non modular builds by moving an essential function into modules.c. Fix this by moving it out again and into asm/sections.h as an inline. To do this, the definition of struct ppc64_opd_entry has been lifted out of modules.c and put in asm/elf.h where it belongs. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-09-17powerpc: Holly board needs dtbImage targetJosh Boyer
One of the changes in the bootwrapper makefile introduced the dtbImage targets for boards that need a simple zImage with a DTB embedded in them (595be948cce574ff2d5dde5d0426a636a4363c70, "[POWERPC] bootwrapper: Build multiple cuImages"). When this was done, it broke booting on the Holly board as the zImage.holly wrapper did not get the DTB embedded properly. This changes the target for the Holly board to a dtbImage so that the wrapper includes the vmlinux, wrapper bits, and DTB. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-09-16powerpc: Fix interrupt values for DMA2 in MPC8610 HPCD device treeTimur Tabi
For Freescale 8xxx devices that use an MPIC, the interrupt numbers in the device tree must be 16 greater than the values documented in the reference manual. In these chips, the MPIC is wired to use the first 16 numbers for external interrupts, but the documentation numbers internal interrupts from 0. In the MPC8610 HPCD device tree, the interrupt properties for the DMA channels for DMA2 were not the adjusted values. This fixes that. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-09-16sparc64: Fix SMP bootup with CONFIG_STACK_DEBUG or ftrace.David S. Miller
Based upon a report by Meelis Roos. Any function call can try to access the current thread register via the _mcount hooks when the kernel is built with -pg (via ftrace or STACK_DEBUG). That can't be setup properly very early on during the bootup of other cpus for sun4u and some early sun4v systems. So add notrace markers to these specific functions, so that _mcount doesn't get invoked too early. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-16sparc64: Fix OOPS in psycho_pcierr_intr_other().David S. Miller
We no longer put the top-level PCI controller device into the PCI layer device list. So pbm->pci_bus->self is always NULL. Therefore, use direct PCI config space accesses to get at the PCI controller's PCI_STATUS register. Tested by Meelis Roos. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-16x86: completely disable NOPL on 32 bitsH. Peter Anvin
Completely disable NOPL on 32 bits. It turns out that Microsoft Virtual PC is so broken it can't even reliably *fail* in the presence of NOPL. This leaves the infrastructure in place but disables it unconditionally. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-09-16[MIPS] VR41xx: unsigned irq cannot be negativeroel kluin
Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Acked-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-09-14x86/paravirt: Remove duplicate paravirt_pagetable_setup_{start, done}()Alex Nixon
They were already called once in arch/x86/kernel/setup.c - we don't need to call them again. fixes: http://bugzilla.kernel.org/show_bug.cgi?id=11485 Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-14xen: fix for xen guest with mem > 3.7GJeremy Fitzhardinge
PFN_PHYS() can truncate large addresses unless its passed a suitable large type. This is fixed more generally in the patch series introducing phys_addr_t, but we need a short-term fix to solve a Xen regression reported by Roberto De Ioris. Reported-by: Roberto De Ioris <roberto@unbit.it> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-13Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] Fix PCI_DMA_BUS_IS_PHYS for ARM [ARM] 5247/1: tosa: SW_EAR_IN support [ARM] 5246/1: tosa: add proper clock alias for tc6393xb clock [ARM] 5245/1: Fix warning about unused return value in drivers/pcmcia [ARM] OMAP: Fix MMC device data imx serial: fix rts handling for non imx1 based hardware imx serial: set RXD mux bit on i.MX27 and i.MX31 i.MX serial: fix init failure pcm037: add rts/cts support for serial port
2008-09-13Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc: Fix user_regset 'n' field values. sparc64: Fix PCI error interrupt registry on PSYCHO. sparc32: Fix function signature of of_bus_sbus_get_flags(). sparc64: Fix interrupt register calculations on Psycho and Sabre.
2008-09-13[ARM] Fix PCI_DMA_BUS_IS_PHYS for ARMRussell King
PCI_DMA_BUS_IS_PHYS was defined to be zero, which meant we ignored the DMA mask for IDE and SCSI transfers. This is wrong - we have no DMA translation hardware. We want to obey DMA masks so that the block layer performs bouncing itself. Reported-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-13Merge branch 'for-rmk' of ↵Russell King
git://pasiphae.extern.pengutronix.de/git/imx/linux-2.6.git
2008-09-13[ARM] 5247/1: tosa: SW_EAR_IN supportDmitry Baryshkov
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-13[ARM] 5246/1: tosa: add proper clock alias for tc6393xb clockDmitry Baryshkov
Add clock alias for clock that is used by tc6393xb device on tosa. As that chip plays pretty major part in tosa life and is currently disabled, this is 2.4.27 material. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-12sparc: Fix user_regset 'n' field values.David S. Miller
As noticed by Russell King, we were not setting this properly to the number of entries, but rather the total size. This results in the core dumping code allocating waayyyy too much memory. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-12sparc64: Fix PCI error interrupt registry on PSYCHO.David S. Miller
We need to pass IRQF_SHARED, otherwise we get things like: IRQ handler type mismatch for IRQ 33 current handler: PSYCHO_UE Call Trace: [000000000048394c] request_irq+0xac/0x120 [00000000007c5f6c] psycho_scan_bus+0x98/0x158 [00000000007c2bc0] pcibios_init+0xdc/0x12c [0000000000426a5c] do_one_initcall+0x1c/0x160 [00000000007c0180] kernel_init+0x9c/0xfc [0000000000427050] kernel_thread+0x30/0x60 [00000000006ae1d0] rest_init+0x10/0x60 on e3500 and similar systems. On a single board, the UE interrupts of two Psycho nodes are funneled through the same interrupt, from of_debug=3 dump: /pci@b,4000: direct translate 2ee --> 21 ... /pci@b,2000: direct translate 2ee --> 21 Decimal "33" mentioned above is the hex "21" mentioned here. Thanks to Meelis Roos for dumps and testing. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-12x86: fix possible x86_64 and EFI regressionJeremy Fitzhardinge
Russ Anderson reported a boot crash with EFI and latest mainline: BIOS-e820: 00000000fffa0000 - 00000000fffac000 (reserved) Pid: 0, comm: swapper Not tainted 2.6.27-rc5-00100-gec0c15a-dirty #5 Call Trace: [<ffffffff80849195>] early_idt_handler+0x55/0x69 [<ffffffff80313e52>] __memcpy+0x12/0xa4 [<ffffffff80859015>] efi_init+0xce/0x932 [<ffffffff80869c83>] setup_early_serial8250_console+0x2d/0x36a [<ffffffff80238688>] __insert_resource+0x18/0xc8 [<ffffffff8084f6de>] setup_arch+0x3a7/0x632 [<ffffffff808499ed>] start_kernel+0x91/0x367 [<ffffffff80849393>] x86_64_start_kernel+0xe3/0xe7 [<ffffffff808492b0>] x86_64_start_kernel+0x0/0xe7 RIP 0x10 Such a crash is possible if the CPU in this system is a 64-bit processor which doesn't support NX (ie, old Intel P4 -based64-bit processors). Certainly, if we support such processors, then we should start with _PAGE_NX initially clear in __supported_pte_flags, and then set it once we've established that the processor does indeed support NX. That will prevent early_ioremap - or anything else - from trying to set it. The simple fix is to simply call check_efer() earlier. Reported-by: Russ Anderson <rja@sgi.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-11MN10300: Change the fault handler to check in_atomic() not in_interrupt()David Howells
Change the MN10300 fault handler to make it check in_atomic() rather than in_interrupt() as commit 6edaf68a87d17570790fd55f0c451a29ec1d6703 did for other architectures: Author: Peter Zijlstra <a.p.zijlstra@chello.nl> Date: Wed Dec 6 20:32:18 2006 -0800 [PATCH] mm: arch do_page_fault() vs in_atomic() In light of the recent pagefault and filemap_copy_from_user work I've gone through all the arch pagefault handlers to make sure the inc_preempt_count() 'feature' works as expected. Several sections of code (including the new filemap_copy_from_user) rely on the fact that faults do not take locks under increased preempt count. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-11Merge branch 'kvm-updates/2.6.27' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates/2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: VMX: Always return old for clear_flush_young() when using EPT KVM: SVM: fix guest global tlb flushes with NPT KVM: SVM: fix random segfaults with NPT enabled
2008-09-11Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] prevent ia64 from invoking irq handlers on offline CPUs [IA64] arch/ia64/sn/pci/tioca_provider.c: introduce missing kfree [IA64] fix up bte.h [IA64] fix compile failure with non modular builds
2008-09-11[ARM] OMAP: Fix MMC device dataRussell King
OMAPs MMC device data was passing the wrong structure via the platform device. Moreover, a missing function means that both sx1_defconfig and omap_h2_1610_defconfig builds failed with undefined reference to `omap_set_mmc_info' errors. Fix this by updating the MMC support from the omapzoom tree. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-11KVM: VMX: Always return old for clear_flush_young() when using EPTSheng Yang
As well as discard fake accessed bit and dirty bit of EPT. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-09-11KVM: SVM: fix guest global tlb flushes with NPTJoerg Roedel
Accesses to CR4 are intercepted even with Nested Paging enabled. But the code does not check if the guest wants to do a global TLB flush. So this flush gets lost. This patch adds the check and the flush to svm_set_cr4. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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