Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f06e4ec1c15691b0cfd2397ae32214fa36c90d71
Commit: f06e4ec1c15691b0cfd2397ae32214fa36c90d71
Parent: e4026440130b84101f2da7f5a0c7a3b046173d3c
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:32:39 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:32:39 2008 +0100
x86: read_tsc sync
make native_read_tsc() always non-speculative.
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
arch/x86/kernel/rtc.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index c42cf12..276cb70 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -200,7 +200,10 @@ unsigned long long __vsyscall_fn native_read_tsc(void)
{
DECLARE_ARGS(val, low, high);
+ rdtsc_barrier();
asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));
+ rdtsc_barrier();
+
return EAX_EDX_VAL(val, low, high);
}
EXPORT_SYMBOL_GPL(native_read_tsc);
-
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