Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Temporarily remove IOMMU merging code.
  [SPARC64]: Update defconfig.
  [SPARC]: Add new timerfd syscall entries.

7 files changed, 151 insertions, 529 deletions

diff --git a/arch/sparc64/defconfig b/arch/sparc64/defconfig
index f62d9f6c5e2..833d74b2b19 100644
--- a/arch/sparc64/defconfig
+++ b/arch/sparc64/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.24-rc4
-# Tue Dec  4 00:37:59 2007
+# Linux kernel version: 2.6.24
+# Tue Feb  5 17:28:19 2008
 #
 CONFIG_SPARC=y
 CONFIG_SPARC64=y
@@ -17,6 +17,7 @@ CONFIG_ARCH_MAY_HAVE_PC_FDC=y
 # CONFIG_ARCH_HAS_ILOG2_U32 is not set
 # CONFIG_ARCH_HAS_ILOG2_U64 is not set
 CONFIG_AUDIT_ARCH=y
+CONFIG_HAVE_SETUP_PER_CPU_AREA=y
 CONFIG_ARCH_NO_VIRT_TO_BUS=y
 CONFIG_OF=y
 CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
@@ -30,13 +31,15 @@ CONFIG_HZ_100=y
 # CONFIG_HZ_300 is not set
 # CONFIG_HZ_1000 is not set
 CONFIG_HZ=100
+# CONFIG_SCHED_HRTICK is not set
+CONFIG_HOTPLUG_CPU=y
 CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
 
 #
 # General setup
 #
 CONFIG_EXPERIMENTAL=y
-CONFIG_BROKEN_ON_SMP=y
+CONFIG_LOCK_KERNEL=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 CONFIG_LOCALVERSION=""
 # CONFIG_LOCALVERSION_AUTO is not set
@@ -76,6 +79,7 @@ CONFIG_FUTEX=y
 CONFIG_ANON_INODES=y
 CONFIG_EPOLL=y
 CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_VM_EVENT_COUNTERS=y
@@ -83,6 +87,14 @@ CONFIG_SLUB_DEBUG=y
 # CONFIG_SLAB is not set
 CONFIG_SLUB=y
 # CONFIG_SLOB is not set
+CONFIG_PROFILING=y
+# CONFIG_MARKERS is not set
+CONFIG_OPROFILE=m
+CONFIG_HAVE_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_PROC_PAGE_MONITOR=y
+CONFIG_SLABINFO=y
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
@@ -92,6 +104,7 @@ CONFIG_MODULE_FORCE_UNLOAD=y
 CONFIG_MODVERSIONS=y
 CONFIG_MODULE_SRCVERSION_ALL=y
 CONFIG_KMOD=y
+CONFIG_STOP_MACHINE=y
 CONFIG_BLOCK=y
 CONFIG_BLK_DEV_IO_TRACE=y
 CONFIG_BLK_DEV_BSG=y
@@ -109,6 +122,8 @@ CONFIG_DEFAULT_AS=y
 # CONFIG_DEFAULT_CFQ is not set
 # CONFIG_DEFAULT_NOOP is not set
 CONFIG_DEFAULT_IOSCHED="anticipatory"
+CONFIG_CLASSIC_RCU=y
+# CONFIG_PREEMPT_RCU is not set
 CONFIG_SYSVIPC_COMPAT=y
 CONFIG_GENERIC_HARDIRQS=y
 
@@ -119,7 +134,8 @@ CONFIG_TICK_ONESHOT=y
 CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
-# CONFIG_SMP is not set
+CONFIG_SMP=y
+CONFIG_NR_CPUS=64
 # CONFIG_CPU_FREQ is not set
 CONFIG_RWSEM_XCHGADD_ALGORITHM=y
 CONFIG_GENERIC_FIND_NEXT_BIT=y
@@ -169,9 +185,12 @@ CONFIG_BINFMT_ELF32=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
 CONFIG_SOLARIS_EMUL=y
+CONFIG_SCHED_SMT=y
+CONFIG_SCHED_MC=y
 # CONFIG_PREEMPT_NONE is not set
 CONFIG_PREEMPT_VOLUNTARY=y
 # CONFIG_PREEMPT is not set
+# CONFIG_RCU_TRACE is not set
 # CONFIG_CMDLINE_BOOL is not set
 
 #
@@ -189,6 +208,7 @@ CONFIG_XFRM=y
 CONFIG_XFRM_USER=m
 # CONFIG_XFRM_SUB_POLICY is not set
 CONFIG_XFRM_MIGRATE=y
+# CONFIG_XFRM_STATISTICS is not set
 CONFIG_NET_KEY=m
 CONFIG_NET_KEY_MIGRATE=y
 CONFIG_INET=y
@@ -249,9 +269,9 @@ CONFIG_IP_DCCP_ACKVEC=y
 CONFIG_IP_DCCP_CCID2=m
 # CONFIG_IP_DCCP_CCID2_DEBUG is not set
 CONFIG_IP_DCCP_CCID3=m
-CONFIG_IP_DCCP_TFRC_LIB=m
 # CONFIG_IP_DCCP_CCID3_DEBUG is not set
 CONFIG_IP_DCCP_CCID3_RTO=100
+CONFIG_IP_DCCP_TFRC_LIB=m
 
 #
 # DCCP Kernel Hacking
@@ -279,6 +299,7 @@ CONFIG_VLAN_8021Q=m
 CONFIG_NET_PKTGEN=m
 CONFIG_NET_TCPPROBE=m
 # CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
 # CONFIG_IRDA is not set
 # CONFIG_BT is not set
 # CONFIG_AF_RXRPC is not set
@@ -343,6 +364,7 @@ CONFIG_BLK_DEV_IDE=y
 CONFIG_BLK_DEV_IDEDISK=y
 # CONFIG_IDEDISK_MULTI_MODE is not set
 CONFIG_BLK_DEV_IDECD=y
+CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS=y
 # CONFIG_BLK_DEV_IDETAPE is not set
 # CONFIG_BLK_DEV_IDEFLOPPY is not set
 # CONFIG_BLK_DEV_IDESCSI is not set
@@ -359,7 +381,6 @@ CONFIG_IDE_GENERIC=y
 # PCI IDE chipsets support
 #
 CONFIG_BLK_DEV_IDEPCI=y
-# CONFIG_IDEPCI_SHARE_IRQ is not set
 CONFIG_IDEPCI_PCIBUS_ORDER=y
 # CONFIG_BLK_DEV_GENERIC is not set
 # CONFIG_BLK_DEV_OPTI621 is not set
@@ -389,7 +410,6 @@ CONFIG_BLK_DEV_ALI15X3=y
 # CONFIG_BLK_DEV_TRM290 is not set
 # CONFIG_BLK_DEV_VIA82CXXX is not set
 # CONFIG_BLK_DEV_TC86C001 is not set
-# CONFIG_IDE_ARM is not set
 CONFIG_BLK_DEV_IDEDMA=y
 CONFIG_IDE_ARCH_OBSOLETE_INIT=y
 # CONFIG_BLK_DEV_HD is not set
@@ -501,7 +521,6 @@ CONFIG_NETDEVICES=y
 # CONFIG_EQUALIZER is not set
 # CONFIG_TUN is not set
 # CONFIG_VETH is not set
-# CONFIG_IP1000 is not set
 # CONFIG_ARCNET is not set
 # CONFIG_PHYLIB is not set
 CONFIG_NET_ETHERNET=y
@@ -533,6 +552,7 @@ CONFIG_NET_PCI=y
 # CONFIG_NE2K_PCI is not set
 # CONFIG_8139CP is not set
 # CONFIG_8139TOO is not set
+# CONFIG_R6040 is not set
 # CONFIG_SIS900 is not set
 # CONFIG_EPIC100 is not set
 # CONFIG_SUNDANCE is not set
@@ -545,6 +565,9 @@ CONFIG_E1000=m
 CONFIG_E1000_NAPI=y
 # CONFIG_E1000_DISABLE_PACKET_SPLIT is not set
 # CONFIG_E1000E is not set
+# CONFIG_E1000E_ENABLED is not set
+# CONFIG_IP1000 is not set
+# CONFIG_IGB is not set
 # CONFIG_MYRI_SBUS is not set
 # CONFIG_NS83820 is not set
 # CONFIG_HAMACHI is not set
@@ -570,6 +593,7 @@ CONFIG_NETDEV_10000=y
 CONFIG_NIU=m
 # CONFIG_MLX4_CORE is not set
 # CONFIG_TEHUTI is not set
+# CONFIG_BNX2X is not set
 # CONFIG_TR is not set
 
 #
@@ -602,7 +626,6 @@ CONFIG_PPPOE=m
 # CONFIG_SLIP is not set
 CONFIG_SLHC=m
 # CONFIG_NET_FC is not set
-# CONFIG_SHAPER is not set
 # CONFIG_NETCONSOLE is not set
 # CONFIG_NETPOLL is not set
 # CONFIG_NET_POLL_CONTROLLER is not set
@@ -679,6 +702,7 @@ CONFIG_VT_CONSOLE=y
 CONFIG_HW_CONSOLE=y
 # CONFIG_VT_HW_CONSOLE_BINDING is not set
 # CONFIG_SERIAL_NONSTANDARD is not set
+# CONFIG_NOZOMI is not set
 
 #
 # Serial drivers
@@ -747,13 +771,13 @@ CONFIG_I2C_ALGOBIT=y
 #
 # Miscellaneous I2C Chip support
 #
-# CONFIG_SENSORS_DS1337 is not set
-# CONFIG_SENSORS_DS1374 is not set
 # CONFIG_DS1682 is not set
 # CONFIG_SENSORS_EEPROM is not set
 # CONFIG_SENSORS_PCF8574 is not set
+# CONFIG_PCF8575 is not set
 # CONFIG_SENSORS_PCA9539 is not set
 # CONFIG_SENSORS_PCF8591 is not set
+# CONFIG_TPS65010 is not set
 # CONFIG_SENSORS_MAX6875 is not set
 # CONFIG_SENSORS_TSL2550 is not set
 # CONFIG_I2C_DEBUG_CORE is not set
@@ -990,6 +1014,7 @@ CONFIG_SND_ALI5451=m
 # CONFIG_SND_BT87X is not set
 # CONFIG_SND_CA0106 is not set
 # CONFIG_SND_CMIPCI is not set
+# CONFIG_SND_OXYGEN is not set
 # CONFIG_SND_CS4281 is not set
 # CONFIG_SND_CS46XX is not set
 # CONFIG_SND_DARLA20 is not set
@@ -1014,6 +1039,7 @@ CONFIG_SND_ALI5451=m
 # CONFIG_SND_HDA_INTEL is not set
 # CONFIG_SND_HDSP is not set
 # CONFIG_SND_HDSPM is not set
+# CONFIG_SND_HIFIER is not set
 # CONFIG_SND_ICE1712 is not set
 # CONFIG_SND_ICE1724 is not set
 # CONFIG_SND_INTEL8X0 is not set
@@ -1031,6 +1057,7 @@ CONFIG_SND_ALI5451=m
 # CONFIG_SND_TRIDENT is not set
 # CONFIG_SND_VIA82XX is not set
 # CONFIG_SND_VIA82XX_MODEM is not set
+# CONFIG_SND_VIRTUOSO is not set
 # CONFIG_SND_VX222 is not set
 # CONFIG_SND_YMFPCI is not set
 # CONFIG_SND_AC97_POWER_SAVE is not set
@@ -1058,6 +1085,10 @@ CONFIG_SND_SUN_CS4231=m
 #
 
 #
+# ALSA SoC audio for Freescale SOCs
+#
+
+#
 # Open Sound System
 #
 # CONFIG_SOUND_PRIME is not set
@@ -1080,6 +1111,7 @@ CONFIG_USB_ARCH_HAS_OHCI=y
 CONFIG_USB_ARCH_HAS_EHCI=y
 CONFIG_USB=y
 # CONFIG_USB_DEBUG is not set
+# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set
 
 #
 # Miscellaneous USB options
@@ -1093,7 +1125,6 @@ CONFIG_USB_DEVICEFS=y
 # USB Host Controller Drivers
 #
 CONFIG_USB_EHCI_HCD=m
-# CONFIG_USB_EHCI_SPLIT_ISO is not set
 # CONFIG_USB_EHCI_ROOT_HUB_TT is not set
 # CONFIG_USB_EHCI_TT_NEWSCHED is not set
 # CONFIG_USB_ISP116X_HCD is not set
@@ -1143,10 +1174,6 @@ CONFIG_USB_STORAGE=m
 #
 # USB port drivers
 #
-
-#
-# USB Serial Converter support
-#
 # CONFIG_USB_SERIAL is not set
 
 #
@@ -1172,14 +1199,6 @@ CONFIG_USB_STORAGE=m
 # CONFIG_USB_TRANCEVIBRATOR is not set
 # CONFIG_USB_IOWARRIOR is not set
 # CONFIG_USB_TEST is not set
-
-#
-# USB DSL modem support
-#
-
-#
-# USB Gadget Support
-#
 # CONFIG_USB_GADGET is not set
 # CONFIG_MMC is not set
 # CONFIG_NEW_LEDS is not set
@@ -1332,11 +1351,6 @@ CONFIG_NLS_DEFAULT="iso8859-1"
 # CONFIG_NLS_KOI8_U is not set
 # CONFIG_NLS_UTF8 is not set
 # CONFIG_DLM is not set
-CONFIG_INSTRUMENTATION=y
-CONFIG_PROFILING=y
-CONFIG_OPROFILE=m
-CONFIG_KPROBES=y
-# CONFIG_MARKERS is not set
 
 #
 # Kernel hacking
@@ -1374,6 +1388,8 @@ CONFIG_DEBUG_BUGVERBOSE=y
 CONFIG_FORCED_INLINING=y
 # CONFIG_BOOT_PRINTK_DELAY is not set
 # CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_KPROBES_SANITY_TEST is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
 # CONFIG_LKDTM is not set
 # CONFIG_FAULT_INJECTION is not set
 # CONFIG_SAMPLES is not set
@@ -1396,8 +1412,9 @@ CONFIG_ASYNC_MEMCPY=m
 CONFIG_ASYNC_XOR=m
 CONFIG_CRYPTO=y
 CONFIG_CRYPTO_ALGAPI=y
-CONFIG_CRYPTO_AEAD=m
+CONFIG_CRYPTO_AEAD=y
 CONFIG_CRYPTO_BLKCIPHER=y
+# CONFIG_CRYPTO_SEQIV is not set
 CONFIG_CRYPTO_HASH=y
 CONFIG_CRYPTO_MANAGER=y
 CONFIG_CRYPTO_HMAC=y
@@ -1416,6 +1433,9 @@ CONFIG_CRYPTO_CBC=y
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_XTS=m
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_CCM is not set
 # CONFIG_CRYPTO_CRYPTD is not set
 CONFIG_CRYPTO_DES=y
 CONFIG_CRYPTO_FCRYPT=m
@@ -1431,13 +1451,16 @@ CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_KHAZAD=m
 CONFIG_CRYPTO_ANUBIS=m
 CONFIG_CRYPTO_SEED=m
+# CONFIG_CRYPTO_SALSA20 is not set
 CONFIG_CRYPTO_DEFLATE=y
 CONFIG_CRYPTO_MICHAEL_MIC=m
 CONFIG_CRYPTO_CRC32C=m
 CONFIG_CRYPTO_CAMELLIA=m
 CONFIG_CRYPTO_TEST=m
 CONFIG_CRYPTO_AUTHENC=m
+# CONFIG_CRYPTO_LZO is not set
 CONFIG_CRYPTO_HW=y
+# CONFIG_CRYPTO_DEV_HIFN_795X is not set
 
 #
 # Library routines
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index ef50d217432..4b78b24ef41 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -11,7 +11,7 @@ obj-y		:= process.o setup.o cpu.o idprom.o \
 		   traps.o auxio.o una_asm.o sysfs.o iommu.o \
 		   irq.o ptrace.o time.o sys_sparc.o signal.o \
 		   unaligned.o central.o pci.o starfire.o semaphore.o \
-		   power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
+		   power.o sbus.o sparc64_ksyms.o chmc.o \
 		   visemul.o prom.o of_device.o hvapi.o sstate.o mdesc.o
 
 obj-$(CONFIG_STACKTRACE) += stacktrace.o
diff --git a/arch/sparc64/kernel/iommu.c b/arch/sparc64/kernel/iommu.c
index 4b9115a4d92..5623a4d59df 100644
--- a/arch/sparc64/kernel/iommu.c
+++ b/arch/sparc64/kernel/iommu.c
@@ -472,94 +472,15 @@ static void dma_4u_unmap_single(struct device *dev, dma_addr_t bus_addr,
 	spin_unlock_irqrestore(&iommu->lock, flags);
 }
 
-#define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))
-
-static void fill_sg(iopte_t *iopte, struct scatterlist *sg,
-		    int nused, int nelems,
-		    unsigned long iopte_protection)
-{
-	struct scatterlist *dma_sg = sg;
-	int i;
-
-	for (i = 0; i < nused; i++) {
-		unsigned long pteval = ~0UL;
-		u32 dma_npages;
-
-		dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
-			      dma_sg->dma_length +
-			      ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
-		do {
-			unsigned long offset;
-			signed int len;
-
-			/* If we are here, we know we have at least one
-			 * more page to map.  So walk forward until we
-			 * hit a page crossing, and begin creating new
-			 * mappings from that spot.
-			 */
-			for (;;) {
-				unsigned long tmp;
-
-				tmp = SG_ENT_PHYS_ADDRESS(sg);
-				len = sg->length;
-				if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
-					pteval = tmp & IO_PAGE_MASK;
-					offset = tmp & (IO_PAGE_SIZE - 1UL);
-					break;
-				}
-				if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
-					pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
-					offset = 0UL;
-					len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
-					break;
-				}
-				sg = sg_next(sg);
-				nelems--;
-			}
-
-			pteval = iopte_protection | (pteval & IOPTE_PAGE);
-			while (len > 0) {
-				*iopte++ = __iopte(pteval);
-				pteval += IO_PAGE_SIZE;
-				len -= (IO_PAGE_SIZE - offset);
-				offset = 0;
-				dma_npages--;
-			}
-
-			pteval = (pteval & IOPTE_PAGE) + len;
-			sg = sg_next(sg);
-			nelems--;
-
-			/* Skip over any tail mappings we've fully mapped,
-			 * adjusting pteval along the way.  Stop when we
-			 * detect a page crossing event.
-			 */
-			while (nelems &&
-			       (pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
-			       (pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
-			       ((pteval ^
-				 (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
-				pteval += sg->length;
-				sg = sg_next(sg);
-				nelems--;
-			}
-			if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
-				pteval = ~0UL;
-		} while (dma_npages != 0);
-		dma_sg = sg_next(dma_sg);
-	}
-}
-
 static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
 			 int nelems, enum dma_data_direction direction)
 {
-	struct iommu *iommu;
+	unsigned long flags, ctx, i, npages, iopte_protection;
+	struct scatterlist *sg;
 	struct strbuf *strbuf;
-	unsigned long flags, ctx, npages, iopte_protection;
+	struct iommu *iommu;
 	iopte_t *base;
 	u32 dma_base;
-	struct scatterlist *sgtmp;
-	int used;
 
 	/* Fast path single entry scatterlists. */
 	if (nelems == 1) {
@@ -578,11 +499,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
 	if (unlikely(direction == DMA_NONE))
 		goto bad_no_ctx;
 
-	/* Step 1: Prepare scatter list. */
-
-	npages = prepare_sg(dev, sglist, nelems);
-
-	/* Step 2: Allocate a cluster and context, if necessary. */
+	npages = calc_npages(sglist, nelems);
 
 	spin_lock_irqsave(&iommu->lock, flags);
 
@@ -599,18 +516,6 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
 	dma_base = iommu->page_table_map_base +
 		((base - iommu->page_table) << IO_PAGE_SHIFT);
 
-	/* Step 3: Normalize DMA addresses. */
-	used = nelems;
-
-	sgtmp = sglist;
-	while (used && sgtmp->dma_length) {
-		sgtmp->dma_address += dma_base;
-		sgtmp = sg_next(sgtmp);
-		used--;
-	}
-	used = nelems - used;
-
-	/* Step 4: Create the mappings. */
 	if (strbuf->strbuf_enabled)
 		iopte_protection = IOPTE_STREAMING(ctx);
 	else
@@ -618,13 +523,27 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
 	if (direction != DMA_TO_DEVICE)
 		iopte_protection |= IOPTE_WRITE;
 
-	fill_sg(base, sglist, used, nelems, iopte_protection);
+	for_each_sg(sglist, sg, nelems, i) {
+		unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
+		unsigned long slen = sg->length;
+		unsigned long this_npages;
 
-#ifdef VERIFY_SG
-	verify_sglist(sglist, nelems, base, npages);
-#endif
+		this_npages = iommu_num_pages(paddr, slen);
 
-	return used;
+		sg->dma_address = dma_base | (paddr & ~IO_PAGE_MASK);
+		sg->dma_length = slen;
+
+		paddr &= IO_PAGE_MASK;
+		while (this_npages--) {
+			iopte_val(*base) = iopte_protection | paddr;
+
+			base++;
+			paddr += IO_PAGE_SIZE;
+			dma_base += IO_PAGE_SIZE;
+		}
+	}
+
+	return nelems;
 
 bad:
 	iommu_free_ctx(iommu, ctx);
@@ -637,11 +556,10 @@ bad_no_ctx:
 static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
 			    int nelems, enum dma_data_direction direction)
 {
-	struct iommu *iommu;
+	unsigned long flags, ctx, i, npages;
 	struct strbuf *strbuf;
+	struct iommu *iommu;
 	iopte_t *base;
-	unsigned long flags, ctx, i, npages;
-	struct scatterlist *sg, *sgprv;
 	u32 bus_addr;
 
 	if (unlikely(direction == DMA_NONE)) {
@@ -654,15 +572,7 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
 
 	bus_addr = sglist->dma_address & IO_PAGE_MASK;
 
-	sgprv = NULL;
-	for_each_sg(sglist, sg, nelems, i) {
-		if (sg->dma_length == 0)
-			break;
-		sgprv = sg;
-	}
-
-	npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
-		  bus_addr) >> IO_PAGE_SHIFT;
+	npages = calc_npages(sglist, nelems);
 
 	base = iommu->page_table +
 		((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
diff --git a/arch/sparc64/kernel/iommu_common.c b/arch/sparc64/kernel/iommu_common.c
deleted file mode 100644
index 72a4acfe8c7..00000000000
--- a/arch/sparc64/kernel/iommu_common.c
+++ /dev/null
@@ -1,248 +0,0 @@
-/* $Id: iommu_common.c,v 1.9 2001/12/17 07:05:09 davem Exp $
- * iommu_common.c: UltraSparc SBUS/PCI common iommu code.
- *
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
- */
-
-#include <linux/dma-mapping.h>
-#include "iommu_common.h"
-
-/* You are _strongly_ advised to enable the following debugging code
- * any time you make changes to the sg code below, run it for a while
- * with filesystems mounted read-only before buying the farm... -DaveM
- */
-
-#ifdef VERIFY_SG
-static int verify_lengths(struct scatterlist *sglist, int nents, int npages)
-{
-	int sg_len, dma_len;
-	int i, pgcount;
-	struct scatterlist *sg;
-
-	sg_len = 0;
-	for_each_sg(sglist, sg, nents, i)
-		sg_len += sg->length;
-
-	dma_len = 0;
-	for_each_sg(sglist, sg, nents, i) {
-		if (!sg->dma_length)
-			break;
-		dma_len += sg->dma_length;
-	}
-
-	if (sg_len != dma_len) {
-		printk("verify_lengths: Error, different, sg[%d] dma[%d]\n",
-		       sg_len, dma_len);
-		return -1;
-	}
-
-	pgcount = 0;
-	for_each_sg(sglist, sg, nents, i) {
-		unsigned long start, end;
-
-		if (!sg->dma_length)
-			break;
-
-		start = sg->dma_address;
-		start = start & IO_PAGE_MASK;
-
-		end = sg->dma_address + sg->dma_length;
-		end = (end + (IO_PAGE_SIZE - 1)) & IO_PAGE_MASK;
-
-		pgcount += ((end - start) >> IO_PAGE_SHIFT);
-	}
-
-	if (pgcount != npages) {
-		printk("verify_lengths: Error, page count wrong, "
-		       "npages[%d] pgcount[%d]\n",
-		       npages, pgcount);
-		return -1;
-	}
-
-	/* This test passes... */
-	return 0;
-}
-
-static int verify_one_map(struct scatterlist *dma_sg, struct scatterlist **__sg, int nents, iopte_t **__iopte)
-{
-	struct scatterlist *sg = *__sg;
-	iopte_t *iopte = *__iopte;
-	u32 dlen = dma_sg->dma_length;
-	u32 daddr;
-	unsigned int sglen;
-	unsigned long sgaddr;
-
-	daddr = dma_sg->dma_address;
-	sglen = sg->length;
-	sgaddr = (unsigned long) sg_virt(sg);
-	while (dlen > 0) {
-		unsigned long paddr;
-
-		/* SG and DMA_SG must begin at the same sub-page boundary. */
-		if ((sgaddr & ~IO_PAGE_MASK) != (daddr & ~IO_PAGE_MASK)) {
-			printk("verify_one_map: Wrong start offset "
-			       "sg[%08lx] dma[%08x]\n",
-			       sgaddr, daddr);
-			nents = -1;
-			goto out;
-		}
-
-		/* Verify the IOPTE points to the right page. */
-		paddr = iopte_val(*iopte) & IOPTE_PAGE;
-		if ((paddr + PAGE_OFFSET) != (sgaddr & IO_PAGE_MASK)) {
-			printk("verify_one_map: IOPTE[%08lx] maps the "
-			       "wrong page, should be [%08lx]\n",
-			       iopte_val(*iopte), (sgaddr & IO_PAGE_MASK) - PAGE_OFFSET);
-			nents = -1;
-			goto out;
-		}
-
-		/* If this SG crosses a page, adjust to that next page
-		 * boundary and loop.
-		 */
-		if ((sgaddr & IO_PAGE_MASK) ^ ((sgaddr + sglen - 1) & IO_PAGE_MASK)) {
-			unsigned long next_page, diff;
-
-			next_page = (sgaddr + IO_PAGE_SIZE) & IO_PAGE_MASK;
-			diff = next_page - sgaddr;
-			sgaddr += diff;
-			daddr += diff;
-			sglen -= diff;
-			dlen -= diff;
-			if (dlen > 0)
-				iopte++;
-			continue;
-		}
-
-		/* SG wholly consumed within this page. */
-		daddr += sglen;
-		dlen -= sglen;
-
-		if (dlen > 0 && ((daddr & ~IO_PAGE_MASK) == 0))
-			iopte++;
-
-		sg = sg_next(sg);
-		if (--nents <= 0)
-			break;
-		sgaddr = (unsigned long) sg_virt(sg);
-		sglen = sg->length;
-	}
-	if (dlen < 0) {
-		/* Transfer overrun, big problems. */
-		printk("verify_one_map: Transfer overrun by %d bytes.\n",
-		       -dlen);
-		nents = -1;
-	} else {
-		/* Advance to next dma_sg implies that the next iopte will
-		 * begin it.
-		 */
-		iopte++;
-	}
-
-out:
-	*__sg = sg;
-	*__iopte = iopte;
-	return nents;
-}
-
-static int verify_maps(struct scatterlist *sg, int nents, iopte_t *iopte)
-{
-	struct scatterlist *dma_sg = sg;
-	struct scatterlist *orig_dma_sg = dma_sg;
-	int orig_nents = nents;
-
-	for (;;) {
-		nents = verify_one_map(dma_sg, &sg, nents, &iopte);
-		if (nents <= 0)
-			break;
-		dma_sg = sg_next(dma_sg);
-		if (dma_sg->dma_length == 0)
-			break;
-	}
-
-	if (nents > 0) {
-		printk("verify_maps: dma maps consumed by some sgs remain (%d)\n",
-		       nents);
-		return -1;
-	}
-
-	if (nents < 0) {
-		printk("verify_maps: Error, messed up mappings, "
-		       "at sg %d dma_sg %d\n",
-		       (int) (orig_nents + nents), (int) (dma_sg - orig_dma_sg));
-		return -1;
-	}
-
-	/* This test passes... */
-	return 0;
-}
-
-void verify_sglist(struct scatterlist *sglist, int nents, iopte_t *iopte, int npages)
-{
-	struct scatterlist *sg;
-
-	if (verify_lengths(sglist, nents, npages) < 0 ||
-	    verify_maps(sglist, nents, iopte) < 0) {
-		int i;
-
-		printk("verify_sglist: Crap, messed up mappings, dumping, iodma at ");
-		printk("%016lx.\n", sglist->dma_address & IO_PAGE_MASK);
-
-		for_each_sg(sglist, sg, nents, i) {
-			printk("sg(%d): page_addr(%p) off(%x) length(%x) "
-			       "dma_address[%016x] dma_length[%016x]\n",
-			       i,
-			       page_address(sg_page(sg)), sg->offset,
-			       sg->length,
-			       sg->dma_address, sg->dma_length);
-		}
-	}
-
-	/* Seems to be ok */
-}
-#endif
-
-unsigned long prepare_sg(struct device *dev, struct scatterlist *sg, int nents)
-{
-	struct scatterlist *dma_sg = sg;
-	unsigned long prev;
-	u32 dent_addr, dent_len;
-	unsigned int max_seg_size;
-
-	prev  = (unsigned long) sg_virt(sg);
-	prev += (unsigned long) (dent_len = sg->length);
-	dent_addr = (u32) ((unsigned long)(sg_virt(sg)) & (IO_PAGE_SIZE - 1UL));
-	max_seg_size = dma_get_max_seg_size(dev);
-	while (--nents) {
-		unsigned long addr;
-
-		sg = sg_next(sg);
-		addr = (unsigned long) sg_virt(sg);
-		if (! VCONTIG(prev, addr) ||
-			dent_len + sg->length > max_seg_size) {
-			dma_sg->dma_address = dent_addr;
-			dma_sg->dma_length = dent_len;
-			dma_sg = sg_next(dma_sg);
-
-			dent_addr = ((dent_addr +
-				      dent_len +
-				      (IO_PAGE_SIZE - 1UL)) >> IO_PAGE_SHIFT);
-			dent_addr <<= IO_PAGE_SHIFT;
-			dent_addr += addr & (IO_PAGE_SIZE - 1UL);
-			dent_len = 0;
-		}
-		dent_len += sg->length;
-		prev = addr + sg->length;
-	}
-	dma_sg->dma_address = dent_addr;
-	dma_sg->dma_length = dent_len;
-
-	if (dma_sg != sg) {
-		dma_sg = sg_next(dma_sg);
-		dma_sg->dma_length = 0;
-	}
-
-	return ((unsigned long) dent_addr +
-		(unsigned long) dent_len +
-		(IO_PAGE_SIZE - 1UL)) >> IO_PAGE_SHIFT;
-}
diff --git a/arch/sparc64/kernel/iommu_common.h b/arch/sparc64/kernel/iommu_common.h
index a90d046e802..4b5cafa2877 100644
--- a/arch/sparc64/kernel/iommu_common.h
+++ b/arch/sparc64/kernel/iommu_common.h
@@ -30,6 +30,32 @@
  */
 #define IOMMU_PAGE_SHIFT		13
 
+#define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))
+
+static inline unsigned long iommu_num_pages(unsigned long vaddr,
+					    unsigned long slen)
+{
+	unsigned long npages;
+
+	npages = IO_PAGE_ALIGN(vaddr + slen) - (vaddr & IO_PAGE_MASK);
+	npages >>= IO_PAGE_SHIFT;
+
+	return npages;
+}
+
+static inline unsigned long calc_npages(struct scatterlist *sglist, int nelems)
+{
+	unsigned long i, npages = 0;
+	struct scatterlist *sg;
+
+	for_each_sg(sglist, sg, nelems, i) {
+		unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
+		npages += iommu_num_pages(paddr, sg->length);
+	}
+
+	return npages;
+}
+
 /* You are _strongly_ advised to enable the following debugging code
  * any time you make changes to the sg code below, run it for a while
  * with filesystems mounted read-only before buying the farm... -DaveM
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index 5ea2eab1ccd..61baf8dc095 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -365,113 +365,14 @@ static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr,
 	spin_unlock_irqrestore(&iommu->lock, flags);
 }
 
-#define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))
-
-static long fill_sg(long entry, struct device *dev,
-		    struct scatterlist *sg,
-		    int nused, int nelems, unsigned long prot)
-{
-	struct scatterlist *dma_sg = sg;
-	unsigned long flags;
-	int i;
-
-	local_irq_save(flags);
-
-	iommu_batch_start(dev, prot, entry);
-
-	for (i = 0; i < nused; i++) {
-		unsigned long pteval = ~0UL;
-		u32 dma_npages;
-
-		dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
-			      dma_sg->dma_length +
-			      ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
-		do {
-			unsigned long offset;
-			signed int len;
-
-			/* If we are here, we know we have at least one
-			 * more page to map.  So walk forward until we
-			 * hit a page crossing, and begin creating new
-			 * mappings from that spot.
-			 */
-			for (;;) {
-				unsigned long tmp;
-
-				tmp = SG_ENT_PHYS_ADDRESS(sg);
-				len = sg->length;
-				if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
-					pteval = tmp & IO_PAGE_MASK;
-					offset = tmp & (IO_PAGE_SIZE - 1UL);
-					break;
-				}
-				if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
-					pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
-					offset = 0UL;
-					len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
-					break;
-				}
-				sg = sg_next(sg);
-				nelems--;
-			}
-
-			pteval = (pteval & IOPTE_PAGE);
-			while (len > 0) {
-				long err;
-
-				err = iommu_batch_add(pteval);
-				if (unlikely(err < 0L))
-					goto iommu_map_failed;
-
-				pteval += IO_PAGE_SIZE;
-				len -= (IO_PAGE_SIZE - offset);
-				offset = 0;
-				dma_npages--;
-			}
-
-			pteval = (pteval & IOPTE_PAGE) + len;
-			sg = sg_next(sg);
-			nelems--;
-
-			/* Skip over any tail mappings we've fully mapped,
-			 * adjusting pteval along the way.  Stop when we
-			 * detect a page crossing event.
-			 */
-			while (nelems &&
-			       (pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
-			       (pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
-			       ((pteval ^
-				 (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
-				pteval += sg->length;
-				sg = sg_next(sg);
-				nelems--;
-			}
-			if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
-				pteval = ~0UL;
-		} while (dma_npages != 0);
-		dma_sg = sg_next(dma_sg);
-	}
-
-	if (unlikely(iommu_batch_end() < 0L))
-		goto iommu_map_failed;
-
-	local_irq_restore(flags);
-	return 0;
-
-iommu_map_failed:
-	local_irq_restore(flags);
-	return -1L;
-}
-
 static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
 			 int nelems, enum dma_data_direction direction)
 {
+	unsigned long flags, npages, i, prot;
+	struct scatterlist *sg;
 	struct iommu *iommu;
-	unsigned long flags, npages, prot;
-	u32 dma_base;
-	struct scatterlist *sgtmp;
 	long entry, err;
-	int used;
+	u32 dma_base;
 
 	/* Fast path single entry scatterlists. */
 	if (nelems == 1) {
@@ -489,10 +390,8 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
 	if (unlikely(direction == DMA_NONE))
 		goto bad;
 
-	/* Step 1: Prepare scatter list. */
-	npages = prepare_sg(dev, sglist, nelems);
+	npages = calc_npages(sglist, nelems);
 
-	/* Step 2: Allocate a cluster and context, if necessary. */
 	spin_lock_irqsave(&iommu->lock, flags);
 	entry = arena_alloc(&iommu->arena, npages);
 	spin_unlock_irqrestore(&iommu->lock, flags);
@@ -503,27 +402,45 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
 	dma_base = iommu->page_table_map_base +
 		(entry << IO_PAGE_SHIFT);
 
-	/* Step 3: Normalize DMA addresses. */
-	used = nelems;
-
-	sgtmp = sglist;
-	while (used && sgtmp->dma_length) {
-		sgtmp->dma_address += dma_base;
-		sgtmp = sg_next(sgtmp);
-		used--;
-	}
-	used = nelems - used;
-
-	/* Step 4: Create the mappings. */
 	prot = HV_PCI_MAP_ATTR_READ;
 	if (direction != DMA_TO_DEVICE)
 		prot |= HV_PCI_MAP_ATTR_WRITE;
 
-	err = fill_sg(entry, dev, sglist, used, nelems, prot);
+	local_irq_save(flags);
+
+	iommu_batch_start(dev, prot, entry);
+
+	for_each_sg(sglist, sg, nelems, i) {
+		unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
+		unsigned long slen = sg->length;
+		unsigned long this_npages;
+
+		this_npages = iommu_num_pages(paddr, slen);
+
+		sg->dma_address = dma_base | (paddr & ~IO_PAGE_MASK);
+		sg->dma_length = slen;
+
+		paddr &= IO_PAGE_MASK;
+		while (this_npages--) {
+			err = iommu_batch_add(paddr);
+			if (unlikely(err < 0L)) {
+				local_irq_restore(flags);
+				goto iommu_map_failed;
+			}
+
+			paddr += IO_PAGE_SIZE;
+			dma_base += IO_PAGE_SIZE;
+		}
+	}
+
+	err = iommu_batch_end();
+
+	local_irq_restore(flags);
+
 	if (unlikely(err < 0L))
 		goto iommu_map_failed;
 
-	return used;
+	return nelems;
 
 bad:
 	if (printk_ratelimit())
@@ -541,12 +458,11 @@ iommu_map_failed:
 static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
 			    int nelems, enum dma_data_direction direction)
 {
+	unsigned long flags, npages;
 	struct pci_pbm_info *pbm;
+	u32 devhandle, bus_addr;
 	struct iommu *iommu;
-	unsigned long flags, i, npages;
-	struct scatterlist *sg, *sgprv;
 	long entry;
-	u32 devhandle, bus_addr;
 
 	if (unlikely(direction == DMA_NONE)) {
 		if (printk_ratelimit())
@@ -558,16 +474,8 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
 	devhandle = pbm->devhandle;
 	
 	bus_addr = sglist->dma_address & IO_PAGE_MASK;
-	sgprv = NULL;
-	for_each_sg(sglist, sg, nelems, i) {
-		if (sg->dma_length == 0)
-			break;
-
-		sgprv = sg;
-	}
 
-	npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
-		  bus_addr) >> IO_PAGE_SHIFT;
+	npages = calc_npages(sglist, nelems);
 
 	entry = ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
 
diff --git a/arch/sparc64/kernel/systbls.S b/arch/sparc64/kernel/systbls.S
index b8058906e72..adc62f490f3 100644
--- a/arch/sparc64/kernel/systbls.S
+++ b/arch/sparc64/kernel/systbls.S
@@ -80,7 +80,8 @@ sys_call_table32:
 	.word sys_fchmodat, sys_faccessat, compat_sys_pselect6, compat_sys_ppoll, sys_unshare
 /*300*/	.word compat_sys_set_robust_list, compat_sys_get_robust_list, compat_sys_migrate_pages, compat_sys_mbind, compat_sys_get_mempolicy
 	.word compat_sys_set_mempolicy, compat_sys_kexec_load, compat_sys_move_pages, sys_getcpu, compat_sys_epoll_pwait
-/*310*/	.word compat_sys_utimensat, compat_sys_signalfd, sys_ni_syscall, sys_eventfd, compat_sys_fallocate
+/*310*/	.word compat_sys_utimensat, compat_sys_signalfd, sys_timerfd_create, sys_eventfd, compat_sys_fallocate
+	.word compat_sys_timerfd_settime, compat_sys_timerfd_gettime
 
 #endif /* CONFIG_COMPAT */
 
@@ -152,7 +153,8 @@ sys_call_table:
 	.word sys_fchmodat, sys_faccessat, sys_pselect6, sys_ppoll, sys_unshare
 /*300*/	.word sys_set_robust_list, sys_get_robust_list, sys_migrate_pages, sys_mbind, sys_get_mempolicy
 	.word sys_set_mempolicy, sys_kexec_load, sys_move_pages, sys_getcpu, sys_epoll_pwait
-/*310*/	.word sys_utimensat, sys_signalfd, sys_ni_syscall, sys_eventfd, sys_fallocate
+/*310*/	.word sys_utimensat, sys_signalfd, sys_timerfd_create, sys_eventfd, sys_fallocate
+	.word sys_timerfd_settime, sys_timerfd_gettime
 
 #if defined(CONFIG_SUNOS_EMUL) || defined(CONFIG_SOLARIS_EMUL) || \
     defined(CONFIG_SOLARIS_EMUL_MODULE)
@@ -271,6 +273,7 @@ sunos_sys_table:
 	.word sunos_nosys, sunos_nosys, sunos_nosys
 	.word sunos_nosys
 /*310*/	.word sunos_nosys, sunos_nosys, sunos_nosys
-	.word sunos_nosys, sunos_nosys
+	.word sunos_nosys, sunos_nosys, sunos_nosys
+	.word sunos_nosys
 
 #endif