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| author | Todd Poynor <toddpoynor@google.com> | 2013-03-13 17:35:08 -0700 |
|---|---|---|
| committer | Todd Poynor <toddpoynor@google.com> | 2013-03-13 17:35:08 -0700 |
| commit | 1249d25539343d1a7fe361c8d40be7a5df5b0216 (patch) | |
| tree | 770c9a33604bb00c62f44d780aefab27e4eb9379 /kernel/smp.c | |
| parent | 4aad13d07babf68c1d0d37ff1e5f797573c4fd2a (diff) | |
| parent | 0b203ab4aacdb6e6dfb8c277aa290f0a02428e6f (diff) | |
| download | kernel_samsung_tuna-1249d25539343d1a7fe361c8d40be7a5df5b0216.zip kernel_samsung_tuna-1249d25539343d1a7fe361c8d40be7a5df5b0216.tar.gz kernel_samsung_tuna-1249d25539343d1a7fe361c8d40be7a5df5b0216.tar.bz2 | |
Merge branch 'android-3.0' into android-omap-3.0
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index fb67dfa..38d9e03 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -31,6 +31,7 @@ struct call_function_data { struct call_single_data csd; atomic_t refs; cpumask_var_t cpumask; + cpumask_var_t cpumask_ipi; }; static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_function_data, cfd_data); @@ -54,6 +55,9 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu) if (!zalloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL, cpu_to_node(cpu))) return notifier_from_errno(-ENOMEM); + if (!zalloc_cpumask_var_node(&cfd->cpumask_ipi, GFP_KERNEL, + cpu_to_node(cpu))) + return notifier_from_errno(-ENOMEM); break; #ifdef CONFIG_HOTPLUG_CPU @@ -63,6 +67,7 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu) case CPU_DEAD: case CPU_DEAD_FROZEN: free_cpumask_var(cfd->cpumask); + free_cpumask_var(cfd->cpumask_ipi); break; #endif }; @@ -524,6 +529,12 @@ void smp_call_function_many(const struct cpumask *mask, return; } + /* + * After we put an entry into the list, data->cpumask + * may be cleared again when another CPU sends another IPI for + * a SMP function call, so data->cpumask will be zero. + */ + cpumask_copy(data->cpumask_ipi, data->cpumask); raw_spin_lock_irqsave(&call_function.lock, flags); /* * Place entry at the _HEAD_ of the list, so that any cpu still @@ -547,7 +558,7 @@ void smp_call_function_many(const struct cpumask *mask, smp_mb(); /* Send a message to all CPUs in the map */ - arch_send_call_function_ipi_mask(data->cpumask); + arch_send_call_function_ipi_mask(data->cpumask_ipi); /* Optionally wait for the CPUs to complete */ if (wait) |