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2009-10-05Merge branch 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds8-30/+106
* 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: add support for change_pte mmu notifiers KVM: MMU: add SPTE_HOST_WRITEABLE flag to the shadow ptes KVM: MMU: dont hold pagecount reference for mapped sptes pages KVM: Prevent overflow in KVM_GET_SUPPORTED_CPUID KVM: VMX: flush TLB with INVEPT on cpu migration KVM: fix LAPIC timer period overflow KVM: s390: fix memsize >= 4G KVM: SVM: Handle tsc in svm_get_msr/svm_set_msr correctly KVM: SVM: Fix tsc offset adjustment when running nested
2009-10-05Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds3-1/+5
* 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Clear sticky FSR register after saving it to func parametr microblaze: UMS is used only for MMU kernel
2009-10-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds6-59/+547
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc: using HZ needs an include of linux/param.h sparc32: convert to asm-generic/hardirq.h sparc64: Cache per-cpu %pcr register value in perf code. sparc64: Fix comment typo in perf_event.c sparc64: Minor coding style fixups in perf code. sparc64: Add a basic conflict engine in preparation for multi-counter support. sparc64: Increase vmalloc size to fix percpu regressions. sparc64: Add initial perf event conflict resolution and checks. sparc: Niagara1 perf event support. sparc: Add Niagara2 HW cache event support. sparc: Support all ultra3 and ultra4 derivatives. sparc: Support HW cache events.
2009-10-05Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds6-21/+35
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: Don't leak 64-bit kernel register values to 32-bit processes x86, SLUB: Remove unused CONFIG FAST_CMPXCHG_LOCAL x86: earlyprintk: Fix regression to handle serial,ttySn as 1 arg x86: Don't generate cmpxchg8b_emu if CONFIG_X86_CMPXCHG64=y x86: Fix csum_ipv6_magic asm memory clobber x86: Optimize cmpxchg64() at build-time some more
2009-10-05Merge branch 'for-linus' of ↵Linus Torvalds7-53/+52
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: fix rename of pt_regs offset defines breakage m68knommu: remove duplicated #include m68knommu: show KiB rather than pages in "Freeing initrd memory:" message
2009-10-05microblaze: Clear sticky FSR register after saving it to func parametrMichal Simek2-1/+3
Previous patch d63678d607d0e37ec7abe5ceb545d7e8aab956a4 clear it for noMMU kernel. This one do it for MMU. Correct noMMU version Signed-off-by: Michal Simek <[email protected]>
2009-10-05microblaze: UMS is used only for MMU kernelMichal Simek1-0/+2
Signed-off-by: Michal Simek <[email protected]>
2009-10-05sparc: using HZ needs an include of linux/param.hStephen Rothwell1-0/+1
Signed-off-by: Stephen Rothwell <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2009-10-04KVM: add support for change_pte mmu notifiersIzik Eidus2-9/+54
this is needed for kvm if it want ksm to directly map pages into its shadow page tables. [marcelo: cast pfn assignment to u64] Signed-off-by: Izik Eidus <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-04KVM: MMU: add SPTE_HOST_WRITEABLE flag to the shadow ptesIzik Eidus2-7/+26
this flag notify that the host physical page we are pointing to from the spte is write protected, and therefore we cant change its access to be write unless we run get_user_pages(write = 1). (this is needed for change_pte support in kvm) Signed-off-by: Izik Eidus <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-04KVM: MMU: dont hold pagecount reference for mapped sptes pagesIzik Eidus1-5/+2
When using mmu notifiers, we are allowed to remove the page count reference tooken by get_user_pages to a specific page that is mapped inside the shadow page tables. This is needed so we can balance the pagecount against mapcount checking. (Right now kvm increase the pagecount and does not increase the mapcount when mapping page into shadow page table entry, so when comparing pagecount against mapcount, you have no reliable result.) Signed-off-by: Izik Eidus <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-04KVM: Prevent overflow in KVM_GET_SUPPORTED_CPUIDAvi Kivity1-0/+2
The number of entries is multiplied by the entry size, which can overflow on 32-bit hosts. Bound the entry count instead. Reported-by: David Wagner <[email protected]> Cc: [email protected] Signed-off-by: Avi Kivity <[email protected]>
2009-10-04KVM: VMX: flush TLB with INVEPT on cpu migrationMarcelo Tosatti1-1/+1
It is possible that stale EPTP-tagged mappings are used, if a vcpu migrates to a different pcpu. Set KVM_REQ_TLB_FLUSH in vmx_vcpu_load, when switching pcpus, which will invalidate both VPID and EPT mappings on the next vm-entry. Cc: [email protected] Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-04KVM: fix LAPIC timer period overflowAurelien Jarno1-1/+1
Don't overflow when computing the 64-bit period from 32-bit registers. Fixes sourceforge bug #2826486. Signed-off-by: Aurelien Jarno <[email protected]> Cc: [email protected] Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-04KVM: s390: fix memsize >= 4GChristian Borntraeger1-1/+1
commit 628eb9b8a8f3 KVM: s390: streamline memslot handling introduced kvm_s390_vcpu_get_memsize. This broke guests >=4G, since this function returned an int. This patch changes the return value to a long. Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2009-10-04KVM: SVM: Handle tsc in svm_get_msr/svm_set_msr correctlyJoerg Roedel1-6/+17
When running nested we need to touch the l1 guests tsc_offset. Otherwise changes will be lost or a wrong value be read. Cc: [email protected] Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-04KVM: SVM: Fix tsc offset adjustment when running nestedJoerg Roedel1-0/+2
When svm_vcpu_load is called while the vcpu is running in guest mode the tsc adjustment made there is lost on the next emulated #vmexit. This causes the tsc running backwards in the guest. This patch fixes the issue by also adjusting the tsc_offset in the emulated hsave area so that it will not get lost. Cc: [email protected] Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2009-10-03Merge branch 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_devLinus Torvalds7-13/+34
* 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_dev: m32r: Fix IPI function calls for SMP m32r: Fix set_memory() for DISCONTIGMEM m32r: add rtc_lock variable m32r: define ioread* and iowrite* macros m32r: export delay loop symbols m32r: fix tme_handler
2009-10-04m32r: Fix IPI function calls for SMPToshihiro HANAWA1-2/+2
This patch fixes the m32r SMP kernel after 2.6.27. A part of the following patch breaks m32r SMP operation. > m32r: convert to generic helpers for IPI function calls > commit 7b7426c8a615cf61df9a77b9df7d5b75d91e3fa0 In the above patch, a CALL_FUNC_SINGLE_IPI was newly introduced, but the its IPI vector number was wrong in the patch code. The m32r SMP kernel hanged-up during boot operation, because the CPU_BOOT_IPI was called instead of CALL_FUNC_SINGLE_IPI (CPU_BOOT_IPI had no side effect at that time because the 2nd core had already been started up), as a result, csd_unlock() was not called, then a dead lock occurred in csd_lock_wait() after the detection of Compact Flash memory as IDE generic disk. Signed-off-by: Toshihiro HANAWA <[email protected]> Signed-off-by: Hirokazu Takata <[email protected]>
2009-10-04m32r: Fix set_memory() for DISCONTIGMEMHirokazu Takata1-1/+4
In case CONFIG_DISCONTIGMEM is set, the memory size of system was always determined by CONFIG_MEMORY_SIZE and was not changeable. This patch fixes set_memory() of arch/m32r/mm/discontig.c so that we can specify memory size by the "mem=<size>" kernel parameter. Signed-off-by: Hirokazu Takata <[email protected]>
2009-10-04m32r: add rtc_lock variableHirokazu Takata1-0/+9
Add a spinlock variable "rtc_lock". This is taken from arch/arm/kernel/time.c. Signed-off-by: Hirokazu Takata <[email protected]>
2009-10-04m32r: define ioread* and iowrite* macrosHirokazu Takata1-0/+7
Define ioread* and iowrite* macros to fix the following build errors: CC [M] drivers/uio/uio_smx.o drivers/uio/uio_smx.c: In function 'smx_handler': drivers/uio/uio_smx.c:31: error: implicit declaration of function 'ioread32' drivers/uio/uio_smx.c:37: error: implicit declaration of function 'iowrite32' Signed-off-by: Hirokazu Takata <[email protected]>
2009-10-04m32r: export delay loop symbolsHirokazu Takata2-6/+4
- Move EXPORT_SYMBOL lines of delay loop functions from arch/m32r/kernel/m32r_ksyms.c to arch/m32r/lib/delay.c. - Export __ndelay. Signed-off-by: Hirokazu Takata <[email protected]>
2009-10-04m32r: fix tme_handlerHirokazu Takata1-4/+8
Fix pmd_bad check code of tme_handler (TLB Miss Exception handler). The correct _KERNPG_TABLE value is not 0x263(=611) but 0x163. Signed-off-by: Hirokazu Takata <[email protected]>
2009-10-02Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds56-253/+721
* master.kernel.org:/home/rmk/linux-2.6-arm: (25 commits) ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7 ARM: 5727/1: Pass IFSR register to do_PrefetchAbort() ARM: 5740/1: fix valid_phys_addr_range() range check ARM: 5739/1: ARM: allow empty ATAG_CORE ARM: 5735/1: sa1111: CodingStyle cleanups ARM: 5738/1: Correct TCM documentation ARM: 5734/1: arm: fix compilation of entry-common.S for older CPUs ARM: 5733/1: fix bcmring compile error ARM: 5732/1: remove redundant include file ARM: 5731/2: Fix U300 generic GPIO, remove ifdefs from MMCI v3 ARM: Ensure do_cache_op takes mmap_sem ARM: Fix __cpuexit section mismatch warnings ARM: Don't allow highmem on SMP platforms without h/w TLB ops broadcast ARM: includecheck fix: mach-davinci, board-dm365-evm.c ARM: Remove unused CONFIG SA1100_H3XXX ARM: Fix warning: unused variable 'highmem' ARM: Fix warning: #warning syscall migrate_pages not implemented ARM: Fix SA11x0 clocksource warning ARM: Fix SA1100 Neponset serial section mismatch ARM: Fix SA1100 Assabet/Neponset PCMCIA section mismatch warnings ...
2009-10-02ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7Kirill A. Shutemov1-1/+50
Currently, on ARMv6 and ARMv7, if an application tries to execute code (or garbage) on non-executable page it hangs. It caused by incorrect prefetch abort handling. Now every prefetch abort processes as a translation fault. To fix this we have to analyze instruction fault status register to figure out reason why we've got the abort and process it accordingly. To make IFSR different from DFSR we set bit 31 which is reserved in both IFSR and DFSR. This patch also tries to protect from future hangs on unexpected exceptions. An application will be killed if unexpected exception type was received. Signed-off-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-02ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()Kirill A. Shutemov33-78/+144
Instruction fault status register, IFSR, was introduced on ARMv6 to provide status information about the last insturction fault. It needed for proper prefetch abort handling. Now we have three prefetch abort model: * legacy - for CPUs before ARMv6. They doesn't provide neither IFSR nor IFAR. We simulate IFSR with section translation fault status for them to generalize code; * ARMv6 - provides IFSR, but not IFAR; * ARMv7 - provides both IFSR and IFAR. Signed-off-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-02ARM: 5740/1: fix valid_phys_addr_range() range checkGreg Ungerer1-1/+1
Commit 1522ac3ec95ff0230e7aa516f86b674fdf72866c ("Fix virtual to physical translation macro corner cases") breaks the end of memory check in valid_phys_addr_range(). The modified expression results in the apparent /dev/mem size being 2 bytes smaller than what it actually is. This patch reworks the expression to correctly check the address, while maintaining use of a valid address to __pa(). Signed-off-by: Greg Ungerer <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-02ARM: 5739/1: ARM: allow empty ATAG_COREDavid Brown1-1/+3
From: David Brown <[email protected]> The ATAG_CORE is allowed to be empty. Although this is handled by parse_tag_core(), __vet_atags during startup rejects this tag unless it contains data. Allow the initial tag to be either the full size, or empty. Signed-off-by: David Brown <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-02ARM: 5735/1: sa1111: CodingStyle cleanupsHartley Sweeten1-13/+12
EXPORT_* macros should follow immediately after the closing function brace line. Signed-off-by: H Hartley Sweeten <[email protected]> Acked-by: Kristoffer Ericson <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-02Merge branch 'fixes' of ↵Russell King6-131/+433
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/xscaleiop Conflicts: MAINTAINERS
2009-10-01s3cmci: add better support for no card detect or write protect availableBen Dooks1-0/+2
Add better support for omitting either the card detect or the write protect GPIOs if the board does not support it. Add the fields no_wprotect and no_detect to the platform data which when set indicate the absence of the respective GPIOs. Note, this also fixes a minor bug where it tries to free IRQ0 if there is no detect gpio available. Signed-off-by: Ben Dooks <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-10-01s3cmci: Kconfig selection for PIO/DMA/BothBen Dooks1-0/+1
Add a selection for the data transfer mode of the s3cmci driver, allowing for either a configuration or rumtime selection of the use of the DMA or PIO transfer code. The PIO only mode is 476 bytes smaller than the driver with both methods compiled in. Signed-off-by: Ben Dooks <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-10-01x86: fix csum_ipv6_magic asm memory clobberSamuel Thibault1-1/+2
Just like ip_fast_csum, the assembly snippet in csum_ipv6_magic needs a memory clobber, as it is only passed the address of the buffer, not a memory reference to the buffer itself. This caused failures in Hurd's pfinetv4 when we tried to compile it with gcc-4.3 (bogus checksums). Signed-off-by: Samuel Thibault <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Acked-by: "David S. Miller" <[email protected]> Cc: Andi Kleen <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-10-01mn10300: fix kernel build failures when using gcc-4.xMark Salter3-40/+45
Fix some build failures when using gcc-4.x for MN10300. Firstly, __get_user() fails to build because the pointer points to a const and __gu_val ends up being read-only: In file included from include/linux/mempolicy.h:62, from init/main.c:50: include/linux/pagemap.h: In function 'fault_in_pages_readable': include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:394: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output include/linux/pagemap.h:400: error: read-only variable '__gu_val' used as 'asm' output make[1]: *** [init/main.o] Error 1 Secondly, gcc-4 doesn't allow casts of lvalues: UPD include/linux/compile.h arch/mn10300/kernel/rtc.c: In function 'calibrate_clock': arch/mn10300/kernel/rtc.c:170: error: lvalue required as left operand of assignment arch/mn10300/kernel/rtc.c:172: error: lvalue required as left operand of assignment make[1]: *** [arch/mn10300/kernel/rtc.o] Error 1 These are seen with gcc 4.2.1. Signed-off-by: Mark Salter <[email protected]> Signed-off-by: David Howells <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-10-01revert "m68k: convert to asm-generic/hardirq.h"Andrew Morton1-2/+10
Revert 45d80eea87c9f8292d2d33173d6866c0ec57238a ("m68k: convert to asm-generic/hardirq.h") - it fails to compile due to an inclusion tangle: In file included from include/linux/irq.h:12, from include/asm-generic/hardirq.h:6, from /usr/src/devel/arch/m68k/include/asm/hardirq_mm.h:6, from /usr/src/devel/arch/m68k/include/asm/hardirq.h:4, from include/linux/hardirq.h:10, from /usr/src/devel/arch/m68k/include/asm/system_mm.h:69, from /usr/src/devel/arch/m68k/include/asm/system.h:4, from include/linux/list.h:7, from include/linux/preempt.h:11, from include/linux/spinlock.h:50, from include/linux/seqlock.h:29, from include/linux/time.h:8, from include/linux/timex.h:56, from include/linux/sched.h:56, from arch/m68k/kernel/asm-offsets.c:14: include/linux/smp.h:17: error: field 'list' has incomplete type Cc: Christoph Hellwig <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-10-01const: constify remaining file_operationsAlexey Dobriyan8-8/+8
[[email protected]: fix KVM] Signed-off-by: Alexey Dobriyan <[email protected]> Acked-by: Mike Frysinger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-10-01sparc32: convert to asm-generic/hardirq.hChristoph Hellwig2-13/+3
From: Christoph Hellwig <[email protected]> [[email protected]: /arch/sparc/include/asm/irq_32.h: move NR_IRQS definition] Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2009-10-01ARM: 5734/1: arm: fix compilation of entry-common.S for older CPUsDmitry Artamonow1-2/+2
Commit 181f817eaaca4c1f introduced some new code to entry-common.S Sadly, this new code uses 'bx' instruction which is available only on ARMv5 and higher CPUs. This causes following compilation errors when building kernel for StrongARM (ARMv4): arch/arm/kernel/entry-common.S: Assembler messages: arch/arm/kernel/entry-common.S:129: Error: selected processor does not support `bx ip' arch/arm/kernel/entry-common.S:138: Error: selected processor does not support `bx ip' Fix these errors by using 'mov pc' instead of 'bx'. Signed-off-by: Dmitry Artamonow <[email protected]> Acked-by: Uwe Kleine-König <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-01ARM: 5733/1: fix bcmring compile errorLeo Chen1-1/+0
The movement of the MMCI header file made bcmring break. It turns out it was including asm/mmc.h without using it so fixing the problem boils down to removing the offending include. Signed-off-by: Linus Walleij <[email protected]> Acked-by: Scott Branden <[email protected]> Signed-off-by: Leo Hao Chen <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-01ARM: 5732/1: remove redundant include fileLeo Chen1-1/+0
Remove duplicated #include('s) in arch/arm/mach-bcmring/core.c Signed-off-by: Huang Weiyi <[email protected]> Signed-off-by: Leo Chen <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-01ARM: 5731/2: Fix U300 generic GPIO, remove ifdefs from MMCI v3Linus Walleij2-0/+11
The #ifdefs in the MMCI driver were erroneous and just masking a bug in the U300 generic GPIO implementation. This removes the ifdefs and fixes the U300 generic GPIO instead. Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Russell King <[email protected]>
2009-10-01x86: Don't leak 64-bit kernel register values to 32-bit processesJan Beulich1-13/+23
While 32-bit processes can't directly access R8...R15, they can gain access to these registers by temporarily switching themselves into 64-bit mode. Therefore, registers not preserved anyway by called C functions (i.e. R8...R11) must be cleared prior to returning to user mode. Signed-off-by: Jan Beulich <[email protected]> Cc: <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-01x86, SLUB: Remove unused CONFIG FAST_CMPXCHG_LOCALJaswinder Singh Rajput1-4/+0
Remove unused CONFIG FAST_CMPXCHG_LOCAL from Kconfig. Reported-by: Robert P. J. Day <[email protected]> Signed-off-by: Jaswinder Singh Rajput <[email protected]> Acked-by: Christoph Lameter <[email protected]> Cc: Pekka Enberg <[email protected]> Cc: Matt Mackall <[email protected]> Cc: Andrew Morton <[email protected]> Cc: "Robert P. J. Day" <[email protected]> Cc: [email protected] LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-01x86: earlyprintk: Fix regression to handle serial,ttySn as 1 argJason Wessel1-1/+4
Commit c953094 ("early_printk: Allow more than one early console") introduced a regression in the parsing of the earlyprintk= kernel arguments. If you specify "earlyprintk=serial,ttyS0,115200" as a kernel argument, the "serial,ttyS" should be parsed as a single argument and not as "serial" and then "ttyS". Also update the documentation to reflect you can specify the ttyS directly without the "serial" argument. Signed-off-by: Jason Wessel <[email protected]> Cc: Len Brown <[email protected]> Cc: Greg KH <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Johannes Weiner <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-01x86: Don't generate cmpxchg8b_emu if CONFIG_X86_CMPXCHG64=yEric Dumazet2-2/+6
Conditionaly compile cmpxchg8b_emu.o and EXPORT_SYMBOL(cmpxchg8b_emu). This reduces the kernel size a bit. Signed-off-by: Eric Dumazet <[email protected]> Cc: Arjan van de Ven <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: John Stultz <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Linus Torvalds <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-01x86: Fix csum_ipv6_magic asm memory clobberSamuel Thibault1-1/+2
Just like ip_fast_csum, the assembly snippet in csum_ipv6_magic needs a memory clobber, as it is only passed the address of the buffer, not a memory reference to the buffer itself. This caused failures in Hurd's pfinetv4 when we tried to compile it with gcc-4.3 (bogus checksums). Signed-off-by: Samuel Thibault <[email protected]> Acked-by: David S. Miller <[email protected]> Cc: Andi Kleen <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-10-01x86: Optimize cmpxchg64() at build-time some moreLinus Torvalds1-1/+2
Try to avoid the 'alternates()' code when we can statically determine that cmpxchg8b is fine. We already have that CONFIG_x86_CMPXCHG64 (enabled by PAE support), and we could easily also enable it for some of the CPU cases. Note, this patch only adds CMPXCHG8B for the obvious Intel CPU's, not for others. (There was something really messy about cmpxchg8b and clone CPU's, so if you enable it on other CPUs later, do it carefully.) If we avoid that asm-alternative thing when we can assume the instruction exists, we'll generate less support crud, and we'll avoid the whole issue with that extra 'nop' for padding instruction sizes etc. LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-30Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds4-14/+83
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched_clock: Fix atomicity/continuity bug by using cmpxchg64() x86: Provide an alternative() based cmpxchg64()
2009-09-30x86: Provide an alternative() based cmpxchg64()Arjan van de Ven4-14/+83
cmpxchg64() today generates, to quote Linus, "barf bag" code. cmpxchg64() is about to get used in the scheduler to fix a bug there, but it's a prerequisite that cmpxchg64() first be made non-sucking. This patch turns cmpxchg64() into an efficient implementation that uses the alternative() mechanism to just use the raw instruction on all modern systems. Note: the fallback is NOT smp safe, just like the current fallback is not SMP safe. (Interested parties with i486 based SMP systems are welcome to submit fix patches for that.) Signed-off-by: Arjan van de Ven <[email protected]> Acked-by: Linus Torvalds <[email protected]> [ fixed asm constraint bug ] Fixed-by: Eric Dumazet <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: John Stultz <[email protected]> Cc: Peter Zijlstra <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
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