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Andi Kleen fde1b3fa94 x86: introduce rdtsc_barrier() 
rdtsc_barrier() is a new barrier primitive that stops RDTSC speculation
to avoid races with timer interrupts on other CPUs.

It expands either to LFENCE (for Intel CPUs) or MFENCE (for
AMD CPUs) which stops RDTSC on all currently known microarchitectures
that implement SSE. On CPUs without SSE there is generally no RDTSC
speculation.

[ mingo@elte.hu: renamed it to rdtsc_barrier() and made it x86-only ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
History 2008-01-30 13:32:38 +01:00
..
acpi x86: dummy placeholder for acpi/reboot.h 2008-01-30 13:31:17 +01:00
asm-alpha alpha: build fixes 2007-12-17 19:28:16 -08:00
asm-arm ext4: Add ext4_find_next_bit() 2008-01-28 23:58:27 -05:00
asm-avr32 remove __attribute_used__ 2008-01-28 23:21:18 +01:00
asm-blackfin [Blackfin] arch: Add the semtimedop syscall. Upstream uClibc doesn't compile without it. 2008-01-27 19:56:43 +08:00
asm-cris ide: remove stale ide.h "configuration options" 2008-01-25 22:17:08 +01:00
asm-frv ide: remove stale ide.h "configuration options" 2008-01-25 22:17:08 +01:00
asm-generic Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2008-01-29 22:46:14 +11:00
asm-h8300 asm-h8300: parentheses around definition CLOCK_TICK_RATE 2007-12-10 19:43:54 -08:00
asm-ia64 x86: voluntary leave_mm before entering ACPI C3 2008-01-30 13:32:01 +01:00
asm-m32r core: remove last users of empty FASTCALL macro 2008-01-30 13:31:17 +01:00
asm-m68k ext4: Add ext4_find_next_bit() 2008-01-28 23:58:27 -05:00
asm-m68knommu ext4: Add ext4_find_next_bit() 2008-01-28 23:58:27 -05:00
asm-mips [MIPS] Malta, Atlas: move an extern function declaration to the header file 2008-01-29 10:15:05 +00:00
asm-parisc [PARISC] print more than one character at a time for pdc console 2007-12-06 09:32:15 -08:00
asm-powerpc powerpc: arch_has_single_step 2008-01-30 13:30:51 +01:00
asm-ppc ppc: fix AT_VECTOR_SIZE on arch/ppc 2007-10-22 19:18:54 -07:00
asm-s390 ext4: Add ext4_find_next_bit() 2008-01-28 23:58:27 -05:00
asm-sh remove __attribute_used__ 2008-01-28 23:21:18 +01:00
asm-sparc [SPARC32]: Silence sparc32 warnings on missing syscalls. 2007-12-14 10:59:50 -08:00
asm-sparc64 [SPARC64]: Implement pci_resource_to_user() 2007-12-26 19:33:46 -08:00
asm-um git-x86: unbreak UML 2008-01-30 13:32:38 +01:00
asm-v850 Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-x86 x86: introduce rdtsc_barrier() 2008-01-30 13:32:38 +01:00
asm-xtensa xtensa: dma-mapping.h is using linux/scatterlist.h functions, so include it 2007-10-24 13:28:40 +02:00
crypto [CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h 2008-01-11 08:16:59 +11:00
keys KEYS: Make request_key() and co fundamentally asynchronous 2007-10-17 08:42:57 -07:00
linux x86: x86 core dump TLS 2008-01-30 13:31:56 +01:00
math-emu Fix <math-emu/soft-fp.h> tpyo 2007-08-18 17:15:17 -07:00
media i2c: Constify client address data 2008-01-27 18:14:46 +01:00
mtd UBI: kill homegrown endian macros 2007-07-18 16:53:49 +03:00
net [NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get 2008-01-28 15:11:17 -08:00
pcmcia [AVR32] pcmcia ioaddr_t should be 32 bits on AVR32 2007-11-15 13:47:19 +01:00
rdma RDMA/cma: add support for rdma_migrate_id() 2008-01-25 14:15:32 -08:00
rxrpc [AF_RXRPC]: Delete the old RxRPC code. 2007-04-26 15:55:48 -07:00
scsi SG: Convert SCSI to use scatterlist helpers for sg chaining 2008-01-28 10:05:27 +01:00
sound [ALSA] version 1.0.15 2007-11-20 20:16:43 +01:00
video Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
xen xen: fix incorrect vcpu_register_vcpu_info hypercall argument 2007-10-16 11:51:31 -07:00
Kbuild do not export /usr/include/scsi in make headers_install 2007-10-17 08:42:52 -07:00