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authorBodo Stroesser <bstroesser@fujitsu-siemens.com>2005-05-05 16:15:37 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-05 16:36:38 -0700
commit5fd861b682785f650114f4df53060d1be7fedecd (patch)
treeeaa02425c2be79ac21ecc684a5b2a31d9f3320c2 /arch/um/sys-x86_64
parent7d37c6d52fce13008f20344790a81a6a5a0003b3 (diff)
downloadop-kernel-dev-5fd861b682785f650114f4df53060d1be7fedecd.zip
op-kernel-dev-5fd861b682785f650114f4df53060d1be7fedecd.tar.gz
[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>
Diffstat (limited to 'arch/um/sys-x86_64')
-rw-r--r--arch/um/sys-x86_64/delay.c18
1 files changed, 18 insertions, 0 deletions
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 @@ void __delay(unsigned long loops)
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
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