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| author | Paul Jackson <pj@sgi.com> | 2006-03-24 03:16:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-24 07:33:22 -0800 |
| commit | 8a39cc60bfa5a72f32d975729a354daca124f6de (patch) | |
| tree | c8a364e6fc5186293bca85152c442a4a23df4822 | |
| parent | 7b5b9ef0e17d52c188fe73ea78e884fe67079e6c (diff) | |
| download | lwn-8a39cc60bfa5a72f32d975729a354daca124f6de.tar.gz lwn-8a39cc60bfa5a72f32d975729a354daca124f6de.zip | |
[PATCH] cpuset use combined atomic_inc_return calls
Replace pairs of calls to <atomic_inc, atomic_read>, with a single call
atomic_inc_return, saving a few bytes of source and kernel text.
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | kernel/cpuset.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 9f28e1f00185..44d13c246e5c 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -858,8 +858,7 @@ static int update_nodemask(struct cpuset *cs, char *buf) mutex_lock(&callback_mutex); cs->mems_allowed = trialcs.mems_allowed; - atomic_inc(&cpuset_mems_generation); - cs->mems_generation = atomic_read(&cpuset_mems_generation); + cs->mems_generation = atomic_inc_return(&cpuset_mems_generation); mutex_unlock(&callback_mutex); set_cpuset_being_rebound(cs); /* causes mpol_copy() rebind */ @@ -1770,8 +1769,7 @@ static long cpuset_create(struct cpuset *parent, const char *name, int mode) atomic_set(&cs->count, 0); INIT_LIST_HEAD(&cs->sibling); INIT_LIST_HEAD(&cs->children); - atomic_inc(&cpuset_mems_generation); - cs->mems_generation = atomic_read(&cpuset_mems_generation); + cs->mems_generation = atomic_inc_return(&cpuset_mems_generation); fmeter_init(&cs->fmeter); cs->parent = parent; @@ -1861,7 +1859,7 @@ int __init cpuset_init_early(void) struct task_struct *tsk = current; tsk->cpuset = &top_cpuset; - tsk->cpuset->mems_generation = atomic_read(&cpuset_mems_generation); + tsk->cpuset->mems_generation = atomic_inc_return(&cpuset_mems_generation); return 0; } @@ -1880,8 +1878,7 @@ int __init cpuset_init(void) top_cpuset.mems_allowed = NODE_MASK_ALL; fmeter_init(&top_cpuset.fmeter); - atomic_inc(&cpuset_mems_generation); - top_cpuset.mems_generation = atomic_read(&cpuset_mems_generation); + top_cpuset.mems_generation = atomic_inc_return(&cpuset_mems_generation); init_task.cpuset = &top_cpuset; |