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
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commit
96348852cf
10
kernel/smp.c
10
kernel/smp.c
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@ -135,7 +135,8 @@ void generic_smp_call_function_interrupt(void)
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*/
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smp_wmb();
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data->csd.flags &= ~CSD_FLAG_WAIT;
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} else
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}
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if (data->csd.flags & CSD_FLAG_ALLOC)
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call_rcu(&data->rcu_head, rcu_free_call_data);
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}
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rcu_read_unlock();
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@ -289,10 +290,11 @@ static void smp_call_function_mask_quiesce_stack(cpumask_t mask)
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data.func = quiesce_dummy;
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data.info = NULL;
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data.flags = CSD_FLAG_WAIT;
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for_each_cpu_mask(cpu, mask)
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for_each_cpu_mask(cpu, mask) {
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data.flags = CSD_FLAG_WAIT;
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generic_exec_single(cpu, &data);
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}
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}
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/**
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@ -371,7 +373,7 @@ int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
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if (wait) {
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csd_flag_wait(&data->csd);
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if (unlikely(slowpath))
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smp_call_function_mask_quiesce_stack(allbutself);
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smp_call_function_mask_quiesce_stack(mask);
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}
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return 0;
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