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smp: Move __smp_call_function_single() below its safe version 

Move this function closer to __smp_call_function_single(). These functions
have very similar behavior and should be displayed in the same block
for clarity.

Reviewed-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: Jan Kara <jack@suse.cz>
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:
Frederic Weisbecker 2014-02-24 16:39:59 +01:00 committed by Jens Axboe
parent 8b28499a71
commit d7877c03f1
1 changed files with 32 additions and 32 deletions
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64
kernel/smp.c
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@ -237,6 +237,38 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info,
}
EXPORT_SYMBOL(smp_call_function_single);
/**
* __smp_call_function_single(): Run a function on a specific CPU
* @cpu: The CPU to run on.
* @csd: Pre-allocated and setup data structure
* @wait: If true, wait until function has completed on specified CPU.
*
* Like smp_call_function_single(), but allow caller to pass in a
* pre-allocated data structure. Useful for embedding @data inside
* other structures, for instance.
*/
int __smp_call_function_single(int cpu, struct call_single_data *csd, int wait)
{
int err = 0;
int this_cpu;
this_cpu = get_cpu();
/*
* Can deadlock when called with interrupts disabled.
* We allow cpu's that are not yet online though, as no one else can
* send smp call function interrupt to this cpu and as such deadlocks
* can't happen.
*/
WARN_ON_ONCE(cpu_online(this_cpu) && wait && irqs_disabled()
&& !oops_in_progress);
err = generic_exec_single(cpu, csd, csd->func, csd->info, wait);
put_cpu();
return err;
}
EXPORT_SYMBOL_GPL(__smp_call_function_single);
/*
* smp_call_function_any - Run a function on any of the given cpus
* @mask: The mask of cpus it can run on.
@ -280,38 +312,6 @@ call:
}
EXPORT_SYMBOL_GPL(smp_call_function_any);
/**
* __smp_call_function_single(): Run a function on a specific CPU
* @cpu: The CPU to run on.
* @csd: Pre-allocated and setup data structure
* @wait: If true, wait until function has completed on specified CPU.
*
* Like smp_call_function_single(), but allow caller to pass in a
* pre-allocated data structure. Useful for embedding @data inside
* other structures, for instance.
*/
int __smp_call_function_single(int cpu, struct call_single_data *csd, int wait)
{
int err = 0;
int this_cpu;
this_cpu = get_cpu();
/*
* Can deadlock when called with interrupts disabled.
* We allow cpu's that are not yet online though, as no one else can
* send smp call function interrupt to this cpu and as such deadlocks
* can't happen.
*/
WARN_ON_ONCE(cpu_online(this_cpu) && wait && irqs_disabled()
&& !oops_in_progress);
err = generic_exec_single(cpu, csd, csd->func, csd->info, wait);
put_cpu();
return err;
}
EXPORT_SYMBOL_GPL(__smp_call_function_single);
/**
* smp_call_function_many(): Run a function on a set of other CPUs.
* @mask: The set of cpus to run on (only runs on online subset).