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authorJeff Dike <jdike@addtoit.com>2005-05-20 13:59:08 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-20 15:48:17 -0700
commit060e352236ece3325a684c72817fbacdac597574 (patch)
tree32d573bfa99e31a5318eda247246261fdd13cd3e
parent13479d52c7a61a18900d7f36730b7d3b43723d97 (diff)
[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>
-rw-r--r--arch/um/sys-i386/delay.c16
-rw-r--r--arch/um/sys-x86_64/delay.c33
2 files changed, 27 insertions, 22 deletions
diff --git a/arch/um/sys-i386/delay.c b/arch/um/sys-i386/delay.c
index e9892eef51ce..2c11b9770e8b 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 @@ void __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(__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);
diff --git a/arch/um/sys-x86_64/delay.c b/arch/um/sys-x86_64/delay.c
index 651332aeec22..137f4446b439 100644
--- a/arch/um/sys-x86_64/delay.c
+++ b/arch/um/sys-x86_64/delay.c
@@ -5,40 +5,37 @@
* Licensed under the GPL
*/
-#include "linux/delay.h"
-#include "asm/processor.h"
-#include "asm/param.h"
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <asm/processor.h>
+#include <asm/param.h>
void __delay(unsigned long loops)
{
unsigned long i;
- for(i = 0; i < loops; i++) ;
+ for(i = 0; i < loops; i++)
+ cpu_relax();
}
void __udelay(unsigned long usecs)
{
- int i, n;
+ unsigned long 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;
+ unsigned long i, n;
n = (loops_per_jiffy * HZ * usecs) / MILLION;
- for(i=0;i<n;i++) ;
+ for(i=0;i<n;i++)
+ cpu_relax();
}
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+EXPORT_SYMBOL(__const_udelay);