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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-12 08:49:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-12 08:49:53 -0700
commit96348852cf8ff5597a39e866838679b3a9a38947 (patch)
treea46ec9749b85d15a8312e18c15cfdf33d28c813b /kernel
parent1c89ac55017f982355c7761e1c912c88c941483d (diff)
parentc2fc11985db304572322f1dcdcb0f71337315006 (diff)
downloadop-kernel-dev-96348852cf8ff5597a39e866838679b3a9a38947.zip
op-kernel-dev-96348852cf8ff5597a39e866838679b3a9a38947.tar.gz
Merge branch 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: generic-ipi: fix stack and rcu interaction bug in smp_call_function_mask(), fix
Diffstat (limited to 'kernel')
-rw-r--r--kernel/smp.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/smp.c b/kernel/smp.c
index e6084f6..782e2b9 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -135,7 +135,8 @@ void generic_smp_call_function_interrupt(void)
*/
smp_wmb();
data->csd.flags &= ~CSD_FLAG_WAIT;
- } else
+ }
+ if (data->csd.flags & CSD_FLAG_ALLOC)
call_rcu(&data->rcu_head, rcu_free_call_data);
}
rcu_read_unlock();
@@ -289,10 +290,11 @@ static void smp_call_function_mask_quiesce_stack(cpumask_t mask)
data.func = quiesce_dummy;
data.info = NULL;
- data.flags = CSD_FLAG_WAIT;
- for_each_cpu_mask(cpu, mask)
+ for_each_cpu_mask(cpu, mask) {
+ data.flags = CSD_FLAG_WAIT;
generic_exec_single(cpu, &data);
+ }
}
/**
@@ -371,7 +373,7 @@ int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
if (wait) {
csd_flag_wait(&data->csd);
if (unlikely(slowpath))
- smp_call_function_mask_quiesce_stack(allbutself);
+ smp_call_function_mask_quiesce_stack(mask);
}
return 0;
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