diff options
| author |   Bodo Stroesser <bstroesser@fujitsu-siemens.com> | 2005-05-05 16:15:37 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-05 16:36:38 -0700 |
| commit | 5fd861b682785f650114f4df53060d1be7fedecd (patch) | |
| tree | eaa02425c2be79ac21ecc684a5b2a31d9f3320c2 /arch/um/sys-x86_64/delay.c | |
| parent | [PATCH] uml: s390 preparation, checksumming done in arch code (diff) | |
| download | linux-dev-5fd861b682785f650114f4df53060d1be7fedecd.tar.xz linux-dev-5fd861b682785f650114f4df53060d1be7fedecd.zip | |
[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 '')
| -rw-r--r-- | arch/um/sys-x86_64/delay.c | 18 |
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 f3b5187942b4..651332aeec22 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 |