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2009-06-16x86, mce: don't init timer if !mce_availableHidetoshi Seto
In mce_cpu_restart, mce_init_timer is called unconditionally. If !mce_available (e.g. mce is disabled), there are no useful work for timer. Stop running it. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-06-16x86, mce: fix a race condition about mce_callin and no_way_outHuang Ying
If one CPU has no_way_out == 1, all other CPUs should have no_way_out == 1. But despite global_nwo is read after mce_callin, global_nwo is updated after mce_callin too. So it is possible that some CPU read global_nwo before some other CPU update global_nwo, so that no_way_out == 1 for some CPU, while no_way_out == 0 for some other CPU. This patch fixes this race condition via moving mce_callin updating after global_nwo updating, with a smp_wmb in between. A smp_rmb is added between their reading too. Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Acked-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
2009-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (30 commits) sparc64: Update defconfig. sparc: Wire up sys_rt_tgsigqueueinfo(). openprom: Squelch useless GCC warning. sparc: replace uses of CPU_MASK_ALL_PTR sparc64: Add proper dynamic ftrace support. sparc: Simplify code using is_power_of_2() routine. sparc: move of_device common code to of_device_common sparc: remove dma-mapping_{32|64}.h sparc: use dma_map_page instead of dma_map_single sparc: add sync_single_for_device and sync_sg_for_device to struct dma_ops sparc: move the duplication in dma-mapping_{32|64}.h to dma-mapping.h p9100: use standard fields for framebuffer physical address and length leo: use standard fields for framebuffer physical address and length cg6: use standard fields for framebuffer physical address and length cg3: use standard fields for framebuffer physical address and length cg14: use standard fields for framebuffer physical address and length bw2: use standard fields for framebuffer physical address and length sparc64: fix and optimize irq distribution sparc64: Use new dynamic per-cpu allocator. sparc64: Only allocate per-cpu areas for possible cpus. ...
2009-06-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (27 commits) Blackfin: hook up new rt_tgsigqueueinfo syscall Blackfin: improve CLKIN_HZ config default Blackfin: initial support for ftrace grapher Blackfin: initial support for ftrace Blackfin: enable support for LOCKDEP Blackfin: add preliminary support for STACKTRACE Blackfin: move custom sections into sections.h Blackfin: punt unused/wrong mutex-dec.h Blackfin: add support for irqflags Blackfin: add support for bzip2/lzma compressed kernel images Blackfin: convert Kconfig style to def_bool Blackfin: bf548-ezkit: update smsc911x resources Blackfin: update aedos-ipipe code to upstream 1.10-00 Blackfin: bf537-stamp: update ADP5520 resources Blackfin: bf518f-ezbrd: fix SPI CS for SPI flash Blackfin: define SPI IRQ in board resources Blackfin: do not configure the UART early if on wrong processor Blackfin: fix deadlock in SMP IPI handler Blackfin: fix flag storage for irq funcs Blackfin: push down exception oops checking ...
2009-06-16Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (33 commits) [S390] s390: hibernation support for s390 [S390] pm: dcssblk power management callbacks. [S390] pm: monreader power management callbacks. [S390] pm: monwriter power management callbacks. [S390] pm: memory hotplug power management callbacks [S390] pm: con3270 power management callbacks. [S390] pm: smsgiucv power management callbacks. [S390] pm: hvc_iucv power management callbacks [S390] PM: af_iucv power management callbacks. [S390] pm: netiucv power management callbacks. [S390] pm: iucv power management callbacks. [S390] iucv: establish reboot notifier [S390] pm: power management support for SCLP drivers. [S390] pm: tape power management callbacks [S390] pm: vmlogrdr power management callbacks [S390] pm: vmur driver power management callbacks [S390] pm: appldata power management callbacks [S390] pm: vmwatchdog power management callbacks. [S390] pm: zfcp driver power management callbacks [S390] pm: claw driver power management callbacks ...
2009-06-16Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (38 commits) ps3flash: Always read chunks of 256 KiB, and cache them ps3flash: Cache the last accessed FLASH chunk ps3: Replace direct file operations by callback ps3: Switch ps3_os_area_[gs]et_rtc_diff to EXPORT_SYMBOL_GPL() ps3: Correct debug message in dma_ioc0_map_pages() drivers/ps3: Add missing annotations ps3fb: Use ps3_system_bus_[gs]et_drvdata() instead of direct access ps3flash: Use ps3_system_bus_[gs]et_drvdata() instead of direct access ps3: shorten ps3_system_bus_[gs]et_driver_data to ps3_system_bus_[gs]et_drvdata ps3: Use dev_[gs]et_drvdata() instead of direct access for system bus devices block/ps3: remove driver_data direct access of struct device ps3vram: Make ps3vram_priv.reports a void * ps3vram: Remove no longer used ps3vram_priv.ddr_base ps3vram: Replace mutex by spinlock + bio_list block: Add bio_list_peek() powerpc: Use generic atomic64_t implementation on 32-bit processors lib: Provide generic atomic64_t implementation powerpc: Add compiler memory barrier to mtmsr macro powerpc/iseries: Mark signal_vsp_instruction() as maybe unused powerpc/iseries: Fix unused function warning in iSeries DT code ...
2009-06-16Merge branch 'i2c-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: therm_windtunnel: Convert to a new-style i2c driver therm_adt746x: Convert to a new-style i2c driver windfarm: Convert to new-style i2c drivers therm_pm72: Convert to a new-style i2c driver i2c-viapro: Add new PCI device ID for VX855 i2c/chips: Move max6875 to drivers/misc/eeprom i2c: Do not give adapters a default parent i2c: Do not probe for TV chips on Voodoo3 adapters i2c: Retry automatically on arbitration loss i2c: Remove void casts
2009-06-16sparc64: Update defconfig.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: Wire up sys_rt_tgsigqueueinfo().David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: replace uses of CPU_MASK_ALL_PTRStephen Rothwell
CPU_MASK_ALL is the (deprecated) "all bits set" cpumask, defined as so: #define CPU_MASK_ALL (cpumask_t) { { ... } } Taking the address of such a temporary is questionable at best, unfortunately 321a8e9d (cpumask: add CPU_MASK_ALL_PTR macro) added CPU_MASK_ALL_PTR: #define CPU_MASK_ALL_PTR (&CPU_MASK_ALL) Which formalizes this practice. One day gcc could bite us over this usage (though we seem to have gotten away with it so far). [Description by Rusty Russell] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Add proper dynamic ftrace support.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Ingo Molnar <mingo@elte.hu>
2009-06-16sparc: Simplify code using is_power_of_2() routine.Robert P. J. Day
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: move of_device common code to of_device_commonRobert Reif
This patch moves code common to of_device_32.c and of_device_64.c into of_device_common.h and of_device_common.c. The only functional difference is in sparc32 where of_bus_default_map is used in place of of_bus_sbus_map because they are equivelent. There is still room for further code consolidation with some minor refactoring. Boot tested on sparc32 and compile tested on sparc64. Signed-off-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: remove dma-mapping_{32|64}.hFUJITA Tomonori
This modifies SPARC32 to use struct dma_map ops. It means that we can remove dma-mapping_{32|64}.h. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: use dma_map_page instead of dma_map_singleFUJITA Tomonori
This patch converts dma_map_single and dma_unmap_single to use map_page and unmap_page respectively and removes unnecessary map_single and unmap_single. map_page can be used to implement map_single but the opposite is impossible. Having only dma_map_page in struct dma_ops is enough. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: add sync_single_for_device and sync_sg_for_device to struct dma_opsFUJITA Tomonori
This adds sync_single_for_device() and sync_sg_for_device() to struct dma_ops in order to unify dma-mpping_{32|64}.h. dma-mpping_32.h needs them though dma-mpping_64.h doesn't. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: move the duplication in dma-mapping_{32|64}.h to dma-mapping.hFUJITA Tomonori
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: fix and optimize irq distributionHong H. Pham
irq_choose_cpu() should compare the affinity mask against cpu_online_map rather than CPU_MASK_ALL, since irq_select_affinity() sets the interrupt's affinity mask to cpu_online_map "and" CPU_MASK_ALL (which ends up being just cpu_online_map). The mask comparison in irq_choose_cpu() will always fail since the two masks are not the same. So the CPU chosen is the first CPU in the intersection of cpu_online_map and CPU_MASK_ALL, which is always CPU0. That means all interrupts are reassigned to CPU0... Distributing interrupts to CPUs in a linearly increasing round robin fashion is not optimal for the UltraSPARC T1/T2. Also, the irq_rover in irq_choose_cpu() causes an interrupt to be assigned to a different processor each time the interrupt is allocated and released. This may lead to an unbalanced distribution over time. A static mapping of interrupts to processors is done to optimize and balance interrupt distribution. For the T1/T2, interrupts are spread to different cores first, and then to strands within a core. The following is some benchmarks showing the effects of interrupt distribution on a T2. The test was done with iperf using a pair of T5220 boxes, each with a 10GBe NIU (XAUI) connected back to back. TCP | Stock Linear RR IRQ Optimized IRQ Streams | 2.6.30-rc5 Distribution Distribution | GBits/sec GBits/sec GBits/sec --------+----------------------------------------- 1 0.839 0.862 0.868 8 1.16 4.96 5.88 16 1.15 6.40 8.04 100 1.09 7.28 8.68 Signed-off-by: Hong H. Pham <hong.pham@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Use new dynamic per-cpu allocator.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Only allocate per-cpu areas for possible cpus.David S. Miller
This gets us real close to the generic implementation of setup_per_cpu_areas() except: 1) We store the per-cpu offset into the trap_block[], whereas the generic code has it's own static array. 2) We have to initialize the %g5 register to hold the boot cpu's per-cpu area offset. 3) The OBP/MDESC cpu info scan is performed at the end. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Get rid of real_setup_per_cpu_areas().David S. Miller
Now that we defer the cpu_data() initializations to the end of per-cpu setup, we can get rid of this local hack we had to setup the per-cpu areas eary. This is a necessary step in order to support HAVE_DYNAMIC_PER_CPU_AREA since the per-cpu setup must run when page structs are available. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Defer cpu_data() setup until end of per-cpu data initialization.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Make mdesc_fill_in_cpu_data take a cpumask_t pointer.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc: Call OF and MD cpu scanning explicitly from paging_init()David S. Miller
We need to split up the cpu present mask setup from the cpu_data initialization, and this is a first step towards that. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Refactor MDESC cpu scanning code using an iterator.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Refactor OBP cpu scanning code using an iterator.David S. Miller
With feedback from Sam Ravnborg. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Use BUILD_BUG_ON() in trap_init().David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Store per-cpu offset in trap_block[]David S. Miller
Surprisingly this actually makes LOAD_PER_CPU_BASE() a little more efficient. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Move trap_block[] definitions into a new header file.David S. Miller
Later we're going to want to get at these definitions from asm/percpu.h and that's not possible via cpudata.h because of the set of dependencies the non-trap_block[] stuff has. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16sparc64: Reclaim trap_block[]->hdescDavid S. Miller
This really isn't necessary at all, a local variable suits the job just fine. This frees up 8 bytes in the trap_block[] that we can use later to store the per-cpu base addresses. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-16[S390] s390: hibernation support for s390Hans-Joachim Picht
This patch introduces the hibernation backend support to the s390 architecture. Now it is possible to suspend a mainframe Linux guest using the following command: echo disk > /sys/power/state Signed-off-by: Hans-Joachim Picht <hans@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-16[S390] pm: appldata power management callbacksGerald Schaefer
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-16[S390] cio: force console functionMartin Schwidefsky
If something goes wrong in a suspend / resume cycle a ccw based console if very likely in the suspended state and cannot print anything. Introduce ccw_device_force_console to force the wake up of the console device to be able to print the oops message. The console device drivers should use this function only if the system paniced. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-16[S390] pm: add kernel_page_presentHans-Joachim Picht
Fix the following build failure caused by make allyesconfig using CONFIG_HIBERNATION and CONFIG_DEBUG_PAGEALLOC kernel/built-in.o: In function `saveable_page': kernel/power/snapshot.c:897: undefined reference to `kernel_page_present' kernel/built-in.o: In function `safe_copy_page': kernel/power/snapshot.c:948: undefined reference to `kernel_page_present' make: *** [.tmp_vmlinux1] Error 1 Signed-off-by: Hans-Joachim Picht <hans@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-16[S390] pm: ccwgroup bus power management callbacksSebastian Ott
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-16[S390] pm: ccw bus power management callbacksSebastian Ott
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-15Merge 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] fix compile error in arch/ia64/mm/extable.c
2009-06-15Merge branch 'timers-for-linus-migration' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-for-linus-migration' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: timers: Logic to move non pinned timers timers: /proc/sys sysctl hook to enable timer migration timers: Identifying the existing pinned timers timers: Framework for identifying pinned timers timers: allow deferrable timers for intervals tv2-tv5 to be deferred Fix up conflicts in kernel/sched.c and kernel/timer.c manually
2009-06-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1244 commits) pkt_sched: Rename PSCHED_US2NS and PSCHED_NS2US ipv4: Fix fib_trie rebalancing Bluetooth: Fix issue with uninitialized nsh.type in DTL-1 driver Bluetooth: Fix Kconfig issue with RFKILL integration PIM-SM: namespace changes ipv4: update ARPD help text net: use a deferred timer in rt_check_expire ieee802154: fix kconfig bool/tristate muckup bonding: initialization rework bonding: use is_zero_ether_addr bonding: network device names are case sensative bonding: elminate bad refcount code bonding: fix style issues bonding: fix destructor bonding: remove bonding read/write semaphore bonding: initialize before registration bonding: bond_create always called with default parameters x_tables: Convert printk to pr_err netfilter: conntrack: optional reliable conntrack event delivery list_nulls: add hlist_nulls_add_head and hlist_nulls_del ...
2009-06-15Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (103 commits) powerpc: Fix bug in move of altivec code to vector.S powerpc: Add support for swiotlb on 32-bit powerpc/spufs: Remove unused error path powerpc: Fix warning when printing a resource_size_t powerpc/xmon: Remove unused variable in xmon.c powerpc/pseries: Fix warnings when printing resource_size_t powerpc: Shield code specific to 64-bit server processors powerpc: Separate PACA fields for server CPUs powerpc: Split exception handling out of head_64.S powerpc: Introduce CONFIG_PPC_BOOK3S powerpc: Move VMX and VSX asm code to vector.S powerpc: Set init_bootmem_done on NUMA platforms as well powerpc/mm: Fix a AB->BA deadlock scenario with nohash MMU context lock powerpc/mm: Fix some SMP issues with MMU context handling powerpc: Add PTRACE_SINGLEBLOCK support fbdev: Add PLB support and cleanup DCR in xilinxfb driver. powerpc/virtex: Add ml510 reference design device tree powerpc/virtex: Add Xilinx ML510 reference design support powerpc/virtex: refactor intc driver and add support for i8259 cascading powerpc/virtex: Add support for Xilinx PCI host bridge ...
2009-06-15[IA64] fix compile error in arch/ia64/mm/extable.cRusty Russell
ad6561dffa17f17bb68d7207d422c26c381c4313 ("module: trim exception table on init free.") put a bogus trim_init_extable() function into ia64 which didn't compile. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
2009-06-15i2c/chips: Move max6875 to drivers/misc/eepromWolfram Sang
This driver only reads the user EEPROM of that chip, so we can move it to the eeprom-directory in order to further clean up (and later remove) drivers/i2c/chips. The Kconfig text was updated to match the current functionality, dropping the meanwhile obsoleted parts. Defconfigs have been adapted. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Ben Gardner <gardner.ben@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-06-15Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: Documentation/feature-removal-schedule.txt drivers/scsi/fcoe/fcoe.c net/core/drop_monitor.c net/core/net-traces.c
2009-06-15ps3: Replace direct file operations by callbackGeert Uytterhoeven
Currently the FLASH database is updated by the kernel using file operations, meant for userspace only. While this works for us because copy_{from,to}_user() on powerpc can handle kernel pointers, this is unportable and a bad example. Replace the file operations by callbacks, registered by the ps3flash driver. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15ps3: Switch ps3_os_area_[gs]et_rtc_diff to EXPORT_SYMBOL_GPL()Geert Uytterhoeven
They were never intended to be exported using EXPORT_SYMBOL() anyway Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15ps3: Correct debug message in dma_ioc0_map_pages()Geert Uytterhoeven
It reports the failure of a call to lv1_put_iopte(), not lv1_map_device_dma_region(). Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15ps3: shorten ps3_system_bus_[gs]et_driver_data to ps3_system_bus_[gs]et_drvdataGeert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Jim Paris <jim@jtan.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15ps3: Use dev_[gs]et_drvdata() instead of direct access for system bus devicesGeert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15powerpc: Use generic atomic64_t implementation on 32-bit processorsPaul Mackerras
This makes 32-bit powerpc use the generic atomic64_t implementation. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-15powerpc: Add compiler memory barrier to mtmsr macroPaul Mackerras
On 32-bit non-Book E, local_irq_restore() turns into just mtmsr(), which doesn't currently have a compiler memory barrier. This means that accesses to memory inside a local_irq_save/restore section, or a spin_lock_irqsave/spin_unlock_irqrestore section on UP, can be reordered by the compiler to occur outside that section. To fix this, this adds a compiler memory barrier to mtmsr for both 32-bit and 64-bit. Having a compiler memory barrier in mtmsr makes sense because it will almost always be changing something about the context in which memory accesses are done, so in general we don't want memory accesses getting moved from one side of an mtmsr to the other. With the barrier in mtmsr(), some of the explicit barriers in hw_irq.h are now redundant, so this removes them. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>