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| author | David S. Miller <davem@davemloft.net> | 2013-02-08 18:02:14 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-08 18:02:14 -0500 |
| commit | fd5023111cf720db890ef34f305ac5d427e690a0 (patch) | |
| tree | 4d21e9a02bfbdafe5fc598af0755db791238dbe7 /kernel/smp.c | |
| parent | 8b9a4d56866e0dca6ae886ed9bff777e50d0b70c (diff) | |
| parent | 836dc9e3fbbab0c30aa6e664417225f5c1fb1c39 (diff) | |
| download | op-kernel-dev-fd5023111cf720db890ef34f305ac5d427e690a0.zip op-kernel-dev-fd5023111cf720db890ef34f305ac5d427e690a0.tar.gz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Synchronize with 'net' in order to sort out some l2tp, wireless, and
ipv6 GRE fixes that will be built on top of in 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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 29dd40a..69f38bd 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -33,6 +33,7 @@ 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); @@ -56,6 +57,9 @@ 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 @@ -65,6 +69,7 @@ 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 }; @@ -526,6 +531,12 @@ 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 @@ -549,7 +560,7 @@ 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) |
