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x86-64: Inline vdso clock_gettime helpers

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This is about a 3% speedup on Sandy Bridge.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Andy Lutomirski 2012-03-22 21:15:52 -07:00 • committed by John Stultz
parent 91ec87d57f
commit 5f293474c4
1 changed files with 5 additions and 4 deletions
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9
arch/x86/vdso/vclock_gettime.c
View file

@ -94,7 +94,8 @@ notrace static inline long vgetns(void)
return (v * gtod->clock.mult) >> gtod->clock.shift; return (v * gtod->clock.mult) >> gtod->clock.shift;
} }
notrace static noinline int do_realtime(struct timespec *ts) /* Code size doesn't matter (vdso is 4k anyway) and this is faster. */
notrace static int __always_inline do_realtime(struct timespec *ts)
{ {
unsigned long seq, ns; unsigned long seq, ns;
int mode; int mode;
@ -111,7 +112,7 @@ notrace static noinline int do_realtime(struct timespec *ts)
return mode; return mode;
} }
notrace static noinline int do_monotonic(struct timespec *ts) notrace static int do_monotonic(struct timespec *ts)
{ {
unsigned long seq, ns; unsigned long seq, ns;
int mode; int mode;
@ -128,7 +129,7 @@ notrace static noinline int do_monotonic(struct timespec *ts)
return mode; return mode;
} }
notrace static noinline int do_realtime_coarse(struct timespec *ts) notrace static int do_realtime_coarse(struct timespec *ts)
{ {
unsigned long seq; unsigned long seq;
do { do {
@ -139,7 +140,7 @@ notrace static noinline int do_realtime_coarse(struct timespec *ts)
return 0; return 0;
} }
notrace static noinline int do_monotonic_coarse(struct timespec *ts) notrace static int do_monotonic_coarse(struct timespec *ts)
{ {
unsigned long seq; unsigned long seq;
do { do {