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| author |   Andy Lutomirski <luto@kernel.org> | 2015-06-25 18:44:12 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-07-06 15:23:30 +0200 |
| commit | bb8dd96032fc63babfc8b378a37dd7681eeec326 (patch) | |
| tree | 4c6bca338792baea78942ed8f64254512e653a8a /arch/x86/um/asm | |
| parent | x86/asm/tsc, x86/kvm: Drop open-coded barrier and use rdtsc_ordered() in kvmclock (diff) | |
| download | linux-dev-bb8dd96032fc63babfc8b378a37dd7681eeec326.tar.xz linux-dev-bb8dd96032fc63babfc8b378a37dd7681eeec326.zip | |
x86/asm/tsc: Remove rdtsc_barrier()
All callers have been converted to rdtsc_ordered().
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm ML <kvm@vger.kernel.org>
Link: http://lkml.kernel.org/r/9baa4ae9a1e7c7c282f9cb2f15bb6bf5c2004032.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/um/asm')
| -rw-r--r-- | arch/x86/um/asm/barrier.h | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/x86/um/asm/barrier.h b/arch/x86/um/asm/barrier.h index b9531d343134..755481f14d90 100644 --- a/arch/x86/um/asm/barrier.h +++ b/arch/x86/um/asm/barrier.h @@ -45,17 +45,4 @@ #define read_barrier_depends() do { } while (0) #define smp_read_barrier_depends() do { } while (0) -/* - * Stop RDTSC speculation. This is needed when you need to use RDTSC - * (or get_cycles or vread that possibly accesses the TSC) in a defined - * code region. - * - * (Could use an alternative three way for this if there was one.) - */ -static inline void rdtsc_barrier(void) -{ - alternative_2("", "mfence", X86_FEATURE_MFENCE_RDTSC, - "lfence", X86_FEATURE_LFENCE_RDTSC); -} - #endif |