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| author | Ingo Molnar <mingo@elte.hu> | 2011-05-27 12:38:52 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 17:41:05 +0200 |
| commit | 29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58 (patch) | |
| tree | a38aa38c8025e050ec82a7e64d02dca07f90ffc7 /kernel/rcutree_plugin.h | |
| parent | f62508f68d04adefc4cf9b0177ba02c8818b3eec (diff) | |
| parent | 23b5c8fa01b723c70a20d6e4ef4ff54c7656d6e1 (diff) | |
| download | blackbird-op-linux-29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58.tar.gz blackbird-op-linux-29f742f88a32c9ab8cf6d9ba69e1ea918be5aa58.zip | |
Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/urgent
Diffstat (limited to 'kernel/rcutree_plugin.h')
| -rw-r--r-- | kernel/rcutree_plugin.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 3f6559a5f5cd..ed339702481d 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -1520,7 +1520,6 @@ int rcu_needs_cpu(int cpu) { int c = 0; int snap; - int snap_nmi; int thatcpu; /* Check for being in the holdoff period. */ @@ -1531,10 +1530,10 @@ int rcu_needs_cpu(int cpu) for_each_online_cpu(thatcpu) { if (thatcpu == cpu) continue; - snap = per_cpu(rcu_dynticks, thatcpu).dynticks; - snap_nmi = per_cpu(rcu_dynticks, thatcpu).dynticks_nmi; + snap = atomic_add_return(0, &per_cpu(rcu_dynticks, + thatcpu).dynticks); smp_mb(); /* Order sampling of snap with end of grace period. */ - if (((snap & 0x1) != 0) || ((snap_nmi & 0x1) != 0)) { + if ((snap & 0x1) != 0) { per_cpu(rcu_dyntick_drain, cpu) = 0; per_cpu(rcu_dyntick_holdoff, cpu) = jiffies - 1; return rcu_needs_cpu_quick_check(cpu); |
