diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2023-01-26 16:08:36 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-31 15:01:47 +0100 |
| commit | 8739c6811572b087decd561f96382087402cc343 (patch) | |
| tree | 60330c4df92998fd1994afa131ebab2b24ca67b2 /include/linux/math64.h | |
| parent | 5c9da9fe826d4a0d84bb322cca27cc8ad8d23b24 (diff) | |
sched/clock/x86: Mark sched_clock() noinstr
In order to use sched_clock() from noinstr code, mark it and all it's
implenentations noinstr.
The whole pvclock thing (used by KVM/Xen) is a bit of a pain,
since it calls out to watchdogs, create a
pvclock_clocksource_read_nowd() variant doesn't do that and can be
noinstr.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230126151323.702003578@infradead.org
Diffstat (limited to 'include/linux/math64.h')
| -rw-r--r-- | include/linux/math64.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/math64.h b/include/linux/math64.h index 8958f4c005c1..8b9191a2849e 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -161,7 +161,7 @@ static inline u64 mul_u32_u32(u32 a, u32 b) #if defined(CONFIG_ARCH_SUPPORTS_INT128) && defined(__SIZEOF_INT128__) #ifndef mul_u64_u32_shr -static inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift) +static __always_inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift) { return (u64)(((unsigned __int128)a * mul) >> shift); } @@ -177,7 +177,7 @@ static inline u64 mul_u64_u64_shr(u64 a, u64 mul, unsigned int shift) #else #ifndef mul_u64_u32_shr -static inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift) +static __always_inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift) { u32 ah, al; u64 ret; |