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generic-ipi: Fix misleading smp_call_function*() description

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After commit:8969a5ede0f9e17da4b943712429aef2c9bcd82b
"generic-ipi: remove kmalloc()", wait = 0 can be guaranteed.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Nick Piggin <npiggin@suse.de>
LKML-Reference: <1256210374-25354-1-git-send-email-sheng@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Sheng Yang 2009-10-22 19:19:34 +08:00 committed by Ingo Molnar
parent 964fe080d9
commit 72f279b256
1 changed files with 3 additions and 8 deletions
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11
kernel/smp.c
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@ -265,9 +265,7 @@ static DEFINE_PER_CPU(struct call_single_data, csd_data);
* @info: An arbitrary pointer to pass to the function. * @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait until function has completed on other CPUs. * @wait: If true, wait until function has completed on other CPUs.
* *
* Returns 0 on success, else a negative status code. Note that @wait * Returns 0 on success, else a negative status code.
* will be implicitly turned on in case of allocation failures, since
* we fall back to on-stack allocation.
*/ */
int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
int wait) int wait)
@ -355,9 +353,7 @@ void __smp_call_function_single(int cpu, struct call_single_data *data,
* @wait: If true, wait (atomically) until function has completed * @wait: If true, wait (atomically) until function has completed
* on other CPUs. * on other CPUs.
* *
* If @wait is true, then returns once @func has returned. Note that @wait * If @wait is true, then returns once @func has returned.
* will be implicitly turned on in case of allocation failures, since
* we fall back to on-stack allocation.
* *
* You must not call this function with disabled interrupts or from a * You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler. Preemption * hardware interrupt handler or from a bottom half handler. Preemption
@ -443,8 +439,7 @@ EXPORT_SYMBOL(smp_call_function_many);
* Returns 0. * Returns 0.
* *
* If @wait is true, then returns once @func has returned; otherwise * If @wait is true, then returns once @func has returned; otherwise
* it returns just before the target cpu calls @func. In case of allocation * it returns just before the target cpu calls @func.
* failure, @wait will be implicitly turned on.
* *
* You must not call this function with disabled interrupts or from a * You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler. * hardware interrupt handler or from a bottom half handler.