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-i386 | |
| 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 'arch/um/sys-i386')
| -rw-r--r-- | arch/um/sys-i386/delay.c | 18 | ||||
| -rw-r--r-- | arch/um/sys-i386/ksyms.c | 5 |
2 files changed, 23 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 @@ +#include "linux/delay.h" +#include "asm/param.h" + void __delay(unsigned long time) { /* Stolen from the i386 __loop_delay */ @@ -12,3 +15,18 @@ void __delay(unsigned long time) :"0" (time)); } +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++) ; +} diff --git a/arch/um/sys-i386/ksyms.c b/arch/um/sys-i386/ksyms.c index b10bfdd26cd6..db524ab3f743 100644 --- a/arch/um/sys-i386/ksyms.c +++ b/arch/um/sys-i386/ksyms.c @@ -2,6 +2,7 @@ #include "linux/in6.h" #include "linux/rwsem.h" #include "asm/byteorder.h" +#include "asm/delay.h" #include "asm/semaphore.h" #include "asm/uaccess.h" #include "asm/checksum.h" @@ -14,3 +15,7 @@ EXPORT_SYMBOL(__up_wakeup); /* Networking helper routines. */ EXPORT_SYMBOL(csum_partial); + +/* delay core functions */ +EXPORT_SYMBOL(__const_udelay); +EXPORT_SYMBOL(__udelay); |