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authorCarsten Otte <cotte@de.ibm.com>2008-01-26 14:11:27 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-01-26 14:11:31 +0100
commitdab5209cd878c146d9f6923f061d1c2725ff210f (patch)
tree4b6bae43bc7050c11efb526ad1f535deba95726c
parent7dc1da9ffae5a344f7115d019e2be069d3e1bb8d (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.c27
-rw-r--r--include/asm-s390/smp.h2
2 files changed, 29 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 040406dbe9a..f66db7185d8 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 218454b9186..c7b74326a52 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