[PATCH] uml: Delay loop cleanups
This patch cleans up the delay implementations a bit, makes the loops
unoptimizable, and exports __udelay and __const_udelay.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/sys-i386/delay.c b/arch/um/sys-i386/delay.c
index e9892ee..2c11b97 100644
--- a/arch/um/sys-i386/delay.c
+++ b/arch/um/sys-i386/delay.c
@@ -1,5 +1,7 @@
-#include "linux/delay.h"
-#include "asm/param.h"
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <asm/param.h>
void __delay(unsigned long time)
{
@@ -20,13 +22,19 @@
int i, n;
n = (loops_per_jiffy * HZ * usecs) / MILLION;
- for(i=0;i<n;i++) ;
+ for(i=0;i<n;i++)
+ cpu_relax();
}
+EXPORT_SYMBOL(__udelay);
+
void __const_udelay(unsigned long usecs)
{
int i, n;
n = (loops_per_jiffy * HZ * usecs) / MILLION;
- for(i=0;i<n;i++) ;
+ for(i=0;i<n;i++)
+ cpu_relax();
}
+
+EXPORT_SYMBOL(__const_udelay);