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Commit dab5209c authored by Carsten Otte's avatar Carsten Otte Committed by Martin Schwidefsky
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[S390] add smp_call_function_mask 



This patch adds the s390 variant for smp_call_function_mask(). The
implementation is pretty straight forward using the wrapper
__smp_call_function_map() which already takes a cpumask_t argument.

Signed-off-by: default avatarCarsten Otte <cotte@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 7dc1da9f

arch/s390/kernel/smp.c

+27 −0
Original line number Diff line number Diff line
@@ -210,6 +210,33 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, 
}

EXPORT_SYMBOL(smp_call_function_single);



/**

 * smp_call_function_mask(): Run a function on a set of other CPUs.

 * @mask: The set of cpus to run on.  Must not include the current cpu.

 * @func: The function to run. This must be fast and non-blocking.

 * @info: An arbitrary pointer to pass to the function.

 * @wait: If true, wait (atomically) until function has completed on other CPUs.

 *

 * Returns 0 on success, else a negative status code.

 *

 * If @wait is true, then returns once @func has returned; otherwise

 * it returns just before the target cpu calls @func.

 *

 * You must not call this function with disabled interrupts or from a

 * hardware interrupt handler or from a bottom half handler.

 */

int

smp_call_function_mask(cpumask_t mask,

			void (*func)(void *), void *info,

			int wait)

{

	preempt_disable();

	__smp_call_function_map(func, info, 0, wait, mask);

	preempt_enable();

	return 0;

}

EXPORT_SYMBOL(smp_call_function_mask);



void smp_send_stop(void)

{

	int cpu, rc;

include/asm-s390/smp.h

+2 −0
Original line number Diff line number Diff line
@@ -90,6 +90,8 @@ extern void __cpu_die (unsigned int cpu); 
extern void cpu_die (void) __attribute__ ((noreturn));

extern int __cpu_up (unsigned int cpu);



extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),

	void *info, int wait);

#endif



#ifndef CONFIG_SMP