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| author | Mikulas Patocka <[email protected]> | 2012-10-22 23:39:16 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-10-28 17:59:36 +0000 |
| commit | 1bf11c53535ab87e3bf14ecdf6747bf46f601c5d (patch) | |
| tree | 9170fa956be0f564b988a88685eb82584347c2cf /security/selinux/netnode.c | |
| parent | percpu-rw-semaphores: use light/heavy barriers (diff) | |
| download | kernel-1bf11c53535ab87e3bf14ecdf6747bf46f601c5d.tar.gz kernel-1bf11c53535ab87e3bf14ecdf6747bf46f601c5d.zip | |
percpu-rw-semaphores: use rcu_read_lock_sched
Use rcu_read_lock_sched / rcu_read_unlock_sched / synchronize_sched
instead of rcu_read_lock / rcu_read_unlock / synchronize_rcu.
This is an optimization. The RCU-protected region is very small, so
there will be no latency problems if we disable preempt in this region.
So we use rcu_read_lock_sched / rcu_read_unlock_sched that translates
to preempt_disable / preempt_disable. It is smaller (and supposedly
faster) than preemptible rcu_read_lock / rcu_read_unlock.
Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'security/selinux/netnode.c')
0 files changed, 0 insertions, 0 deletions