From 44259b1abfaa8bb819d25d41d71e8e33e25dd36a Mon Sep 17 00:00:00 2001 From: Andy Lutomirski Date: Mon, 23 May 2011 09:31:28 -0400 Subject: x86-64: Move vread_tsc into a new file with sensible options vread_tsc is short and hot, and it's userspace code so the usual reasons to enable -pg and turn off sibling calls don't apply. (OK, turning off sibling calls has no effect. But it might someday...) As an added benefit, tsc.c is profilable now. Signed-off-by: Andy Lutomirski Cc: Andi Kleen Cc: Linus Torvalds Cc: "David S. Miller" Cc: Eric Dumazet Cc: Peter Zijlstra Cc: Borislav Petkov Link: http://lkml.kernel.org/r/%3C99c6d7f5efa3ccb65b4ac6eb443e1ab7bad47d7b.1306156808.git.luto%40mit.edu%3E Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/tsc.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/x86/include/asm/tsc.h') diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h index 83e2efd181e2..9db5583b6d38 100644 --- a/arch/x86/include/asm/tsc.h +++ b/arch/x86/include/asm/tsc.h @@ -51,6 +51,10 @@ extern int unsynchronized_tsc(void); extern int check_tsc_unstable(void); extern unsigned long native_calibrate_tsc(void); +#ifdef CONFIG_X86_64 +extern cycles_t vread_tsc(void); +#endif + /* * Boot-time check whether the TSCs are synchronized across * all CPUs/cores: -- cgit v1.2.3