From: Avi Kivity <avi@qumranet.com>
Date: Mon, 9 Jul 2007 14:11:49 +0000 (+0300)
Subject: SMP: Allow smp_call_function_single() to current cpu
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a52b1752c077cb919b71167c54968a0b91673281;p=linux-beck.git

SMP: Allow smp_call_function_single() to current cpu

This removes the requirement for callers to get_cpu() to check in simple
cases.  This patch is for !CONFIG_SMP.

Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---

diff --git a/include/linux/smp.h b/include/linux/smp.h
index 96ac21f8dd73..8039daced688 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -7,6 +7,7 @@
  */
 
 #include <linux/errno.h>
+#include <asm/system.h>
 
 extern void cpu_idle(void);
 
@@ -102,7 +103,11 @@ static inline void smp_send_reschedule(int cpu) { }
 static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
 					   void *info, int retry, int wait)
 {
-	return -EBUSY;
+	WARN_ON(cpuid != 0);
+	local_irq_disable();
+	func(info);
+	local_irq_enable();
+	return 0;
 }
 
 #endif /* !SMP */