From: Paul Jackson <[email protected]>
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 <[email protected]>
---
kernel/cpuset.c | 11 ++++-------
1 files changed, 4 insertions(+), 7 deletions(-)
--- 2.6.16-rc1-mm5.orig/kernel/cpuset.c 2006-02-07 16:26:03.511639777 -0800
+++ 2.6.16-rc1-mm5/kernel/cpuset.c 2006-02-07 16:26:43.563843169 -0800
@@ -858,8 +858,7 @@ static int update_nodemask(struct cpuset
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
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;
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <[email protected]> 1.650.933.1373
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