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smp: Teach __smp_call_function_single() to check for offline cpus

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Align __smp_call_function_single() with smp_call_function_single() so
that it also checks whether requested cpu is still online.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jan Kara
2014-02-24 16:39:57 +01:00
committed by Jens Axboe
parent 0ebeb79ce9
commit 08eed44c72
3 changed files with 11 additions and 8 deletions
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5
kernel/up.c
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@@ -22,14 +22,15 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
}
EXPORT_SYMBOL(smp_call_function_single);
void __smp_call_function_single(int cpu, struct call_single_data *csd,
int wait)
int __smp_call_function_single(int cpu, struct call_single_data *csd,
int wait)
{
unsigned long flags;
local_irq_save(flags);
csd->func(csd->info);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(__smp_call_function_single);