diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2008-01-25 21:08:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-25 21:08:28 +0100 |
| commit | 02b67cc3ba36bdba351d6c3a00593f4ec550d9d3 (patch) | |
| tree | 5185ad2d780974dc864f12d81d6c8b9fec73097b /include/linux | |
| parent | 03319ec8b06849051747a17aa2a0f9aba9277980 (diff) | |
sched: do not do cond_resched() when CONFIG_PREEMPT
Why do we even have cond_resched when real preemption
is on? It seems to be a waste of space and time.
remove cond_resched with CONFIG_PREEMPT on.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/kernel.h | 4 | ||||
| -rw-r--r-- | include/linux/sched.h | 13 |
2 files changed, 14 insertions, 3 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 94bc99656963..a7283c9beadf 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -105,8 +105,8 @@ struct user; * supposed to. */ #ifdef CONFIG_PREEMPT_VOLUNTARY -extern int cond_resched(void); -# define might_resched() cond_resched() +extern int _cond_resched(void); +# define might_resched() _cond_resched() #else # define might_resched() do { } while (0) #endif diff --git a/include/linux/sched.h b/include/linux/sched.h index fe3f8fbc614e..7907845c2348 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1885,7 +1885,18 @@ static inline int need_resched(void) * cond_resched_lock() will drop the spinlock before scheduling, * cond_resched_softirq() will enable bhs before scheduling. */ -extern int cond_resched(void); +#ifdef CONFIG_PREEMPT +static inline int cond_resched(void) +{ + return 0; +} +#else +extern int _cond_resched(void); +static inline int cond_resched(void) +{ + return _cond_resched(); +} +#endif extern int cond_resched_lock(spinlock_t * lock); extern int cond_resched_softirq(void); |