diff options
| author | Carsten Otte | 2008-01-26 14:11:27 +0100 |
|---|---|---|
| committer | Martin Schwidefsky | 2008-01-26 14:11:31 +0100 |
| commit | dab5209cd878c146d9f6923f061d1c2725ff210f (patch) | |
| tree | 4b6bae43bc7050c11efb526ad1f535deba95726c | |
| parent | 7dc1da9ffae5a344f7115d019e2be069d3e1bb8d (diff) | |
[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: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/kernel/smp.c | 27 | ||||
| -rw-r--r-- | include/asm-s390/smp.h | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 040406dbe9aa..f66db7185d85 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -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; diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h index 218454b91862..c7b74326a527 100644 --- a/include/asm-s390/smp.h +++ b/include/asm-s390/smp.h @@ -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 |