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| author | Ingo Molnar <mingo@elte.hu> | 2006-01-12 01:05:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-12 09:08:49 -0800 |
| commit | 4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f (patch) | |
| tree | 8c034f802157d7f449e76f45086c0e13e0ea4711 /include/asm-alpha | |
| parent | c6b44d10f25e5a93eca5135b686a35775c63546e (diff) | |
| download | lwn-4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f.tar.gz lwn-4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f.zip | |
[PATCH] sched: add cacheflush() asm
Add per-arch sched_cacheflush() which is a write-back cacheflush used by
the migration-cost calibration code at bootup time.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-alpha')
| -rw-r--r-- | include/asm-alpha/system.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h index 050e86d12891..766ab868e8ab 100644 --- a/include/asm-alpha/system.h +++ b/include/asm-alpha/system.h @@ -140,6 +140,16 @@ extern void halt(void) __attribute__((noreturn)); struct task_struct; extern struct task_struct *alpha_switch_to(unsigned long, struct task_struct*); +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + #define imb() \ __asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory") |