Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=de489353918139161eee241a6224d67f22bfd024
Commit: de489353918139161eee241a6224d67f22bfd024
Parent: 4055551bbcb0d0be8c916134b4e9074826e89638
Author: Avi Kivity <[EMAIL PROTECTED]>
AuthorDate: Mon Jul 9 17:11:49 2007 +0300
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Mon Jul 16 12:05:50 2007 +0300
i386: Allow smp_call_function_single() to current cpu
This removes the requirement for callers to get_cpu() to check in simple
cases.
Cc: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
arch/i386/kernel/smpcommon.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/i386/kernel/smpcommon.c b/arch/i386/kernel/smpcommon.c
index 1868ae1..bbfe85a 100644
--- a/arch/i386/kernel/smpcommon.c
+++ b/arch/i386/kernel/smpcommon.c
@@ -47,7 +47,7 @@ int smp_call_function(void (*func) (void *info), void *info,
int nonatomic,
EXPORT_SYMBOL(smp_call_function);
/**
- * smp_call_function_single - Run a function on another CPU
+ * smp_call_function_single - Run a function on a specific CPU
* @cpu: The target CPU. Cannot be the calling CPU.
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
@@ -66,9 +66,11 @@ int smp_call_function_single(int cpu, void (*func) (void
*info), void *info,
int ret;
int me = get_cpu();
if (cpu == me) {
- WARN_ON(1);
+ local_irq_disable();
+ func(info);
+ local_irq_enable();
put_cpu();
- return -EBUSY;
+ return 0;
}
ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);
-
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