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| author | Andy Lutomirski <luto@kernel.org> | 2015-06-25 18:43:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-07-06 15:23:25 +0200 |
| commit | c6e5ca35c4685cd920b1d5279dbc9f4483d7dfd4 (patch) | |
| tree | d252a703a8573bbaadb1cef4ed0a1f477a6710ca /arch/x86/include/asm/msr.h | |
| parent | x86/asm/entry/32: Replace RESTORE_RSI_RDI with open-coded 32-bit reads (diff) | |
| download | linux-c6e5ca35c4685cd920b1d5279dbc9f4483d7dfd4.tar.xz linux-c6e5ca35c4685cd920b1d5279dbc9f4483d7dfd4.zip | |
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 <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: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm ML <kvm@vger.kernel.org>
Link: http://lkml.kernel.org/r/d05ffe2aaf8468ca475ebc00efad7b2fa174af19.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/msr.h')
| -rw-r--r-- | arch/x86/include/asm/msr.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h index e6a707eb5081..88711470af7f 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 { \ |