[PATCH] uml: s390 preparation, delay moved to arch
s390 has fast read access to realtime clock (nanosecond resolution). So it
makes sense to have an arch-specific implementation not only of __delay, but
__udelay also.
Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/sys-x86_64/delay.c b/arch/um/sys-x86_64/delay.c
index f3b5187..651332a 100644
--- a/arch/um/sys-x86_64/delay.c
+++ b/arch/um/sys-x86_64/delay.c
@@ -5,7 +5,9 @@
* Licensed under the GPL
*/
+#include "linux/delay.h"
#include "asm/processor.h"
+#include "asm/param.h"
void __delay(unsigned long loops)
{
@@ -14,6 +16,22 @@
for(i = 0; i < loops; i++) ;
}
+void __udelay(unsigned long usecs)
+{
+ int i, n;
+
+ n = (loops_per_jiffy * HZ * usecs) / MILLION;
+ for(i=0;i<n;i++) ;
+}
+
+void __const_udelay(unsigned long usecs)
+{
+ int i, n;
+
+ n = (loops_per_jiffy * HZ * usecs) / MILLION;
+ for(i=0;i<n;i++) ;
+}
+
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
