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authorBodo Stroesser <bstroesser@fujitsu-siemens.com>2005-05-05 19:15:37 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-05 19:36:38 -0400
commit5fd861b682785f650114f4df53060d1be7fedecd (patch)
treeeaa02425c2be79ac21ecc684a5b2a31d9f3320c2 /arch/um/sys-i386/delay.c
parent7d37c6d52fce13008f20344790a81a6a5a0003b3 (diff)
[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-i386/delay.c')
-rw-r--r--arch/um/sys-i386/delay.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/um/sys-i386/delay.c b/arch/um/sys-i386/delay.c
index 20d37dbbaf08..e9892eef51ce 100644
--- a/arch/um/sys-i386/delay.c
+++ b/arch/um/sys-i386/delay.c
@@ -1,3 +1,6 @@
1#include "linux/delay.h"
2#include "asm/param.h"
3
1void __delay(unsigned long time) 4void __delay(unsigned long time)
2{ 5{
3 /* Stolen from the i386 __loop_delay */ 6 /* Stolen from the i386 __loop_delay */
@@ -12,3 +15,18 @@ void __delay(unsigned long time)
12 :"0" (time)); 15 :"0" (time));
13} 16}
14 17
18void __udelay(unsigned long usecs)
19{
20 int i, n;
21
22 n = (loops_per_jiffy * HZ * usecs) / MILLION;
23 for(i=0;i<n;i++) ;
24}
25
26void __const_udelay(unsigned long usecs)
27{
28 int i, n;
29
30 n = (loops_per_jiffy * HZ * usecs) / MILLION;
31 for(i=0;i<n;i++) ;
32}