From c6e5ca35c4685cd920b1d5279dbc9f4483d7dfd4 Mon Sep 17 00:00:00 2001 From: Andy Lutomirski Date: Thu, 25 Jun 2015 18:43:55 +0200 Subject: x86/asm/tsc: Inline native_read_tsc() and remove __native_read_tsc() In the following commit: cdc7957d1954 ("x86: move native_read_tsc() offline") ... native_read_tsc() was moved out of line, presumably for some now-obsolete vDSO-related reason. Undo it. The entire rdtsc, shl, or sequence is only 11 bytes, and calls via rdtscl() and similar helpers were already inlined. Signed-off-by: Andy Lutomirski Signed-off-by: Borislav Petkov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Huang Rui Cc: John Stultz Cc: Len Brown Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Ralf Baechle Cc: Thomas Gleixner Cc: kvm ML Link: http://lkml.kernel.org/r/d05ffe2aaf8468ca475ebc00efad7b2fa174af19.1434501121.git.luto@kernel.org Signed-off-by: Ingo Molnar --- arch/x86/include/asm/msr.h | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'arch/x86/include/asm/msr.h') diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h index e6a707e..8871147 100644 --- a/arch/x86/include/asm/msr.h +++ b/arch/x86/include/asm/msr.h @@ -106,12 +106,10 @@ notrace static inline int native_write_msr_safe(unsigned int msr, return err; } -extern unsigned long long native_read_tsc(void); - extern int rdmsr_safe_regs(u32 regs[8]); extern int wrmsr_safe_regs(u32 regs[8]); -static __always_inline unsigned long long __native_read_tsc(void) +static __always_inline unsigned long long native_read_tsc(void) { DECLARE_ARGS(val, low, high); @@ -181,10 +179,10 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) } #define rdtscl(low) \ - ((low) = (u32)__native_read_tsc()) + ((low) = (u32)native_read_tsc()) #define rdtscll(val) \ - ((val) = __native_read_tsc()) + ((val) = native_read_tsc()) #define rdpmc(counter, low, high) \ do { \ -- cgit v1.1