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x86/asm/tsc: Remove rdtsc_barrier()

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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>
This commit is contained in:
Andy Lutomirski 2015-06-25 18:44:12 +02:00 committed by Ingo Molnar
parent 502dfeff23
commit bb8dd96032
2 changed files with 0 additions and 24 deletions
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11
arch/x86/include/asm/barrier.h
View File

@ -91,15 +91,4 @@ do { \
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
/*
* 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.
*/
static __always_inline void rdtsc_barrier(void)
{
alternative_2("", "mfence", X86_FEATURE_MFENCE_RDTSC,
"lfence", X86_FEATURE_LFENCE_RDTSC);
}
#endif /* _ASM_X86_BARRIER_H */

13
arch/x86/um/asm/barrier.h
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@ -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