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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:36 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:55 +0100
commitb020632e40c3ed5e8c0c066d022672907e8401cf (patch)
treed7f805bd27e8378436fbba7e7457afbd10c22ed8 /arch/s390/kernel/asm-offsets.c
parentfc5243d98ac2575ad14a974b3c097e9ba874c03d (diff)
downloadop-kernel-dev-b020632e40c3ed5e8c0c066d022672907e8401cf.zip
op-kernel-dev-b020632e40c3ed5e8c0c066d022672907e8401cf.tar.gz
[S390] introduce vdso on s390
Add a vdso to speed up gettimeofday and clock_getres/clock_gettime for CLOCK_REALTIME/CLOCK_MONOTONIC. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/asm-offsets.c')
-rw-r--r--arch/s390/kernel/asm-offsets.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 3d144e6..e641f60 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -6,6 +6,7 @@
#include <linux/sched.h>
#include <linux/kbuild.h>
+#include <asm/vdso.h>
int main(void)
{
@@ -38,5 +39,19 @@ int main(void)
DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain));
DEFINE(__SF_GPRS, offsetof(struct stack_frame, gprs));
DEFINE(__SF_EMPTY, offsetof(struct stack_frame, empty1));
+ BLANK();
+ /* timeval/timezone offsets for use by vdso */
+ DEFINE(__VDSO_UPD_COUNT, offsetof(struct vdso_data, tb_update_count));
+ DEFINE(__VDSO_XTIME_STAMP, offsetof(struct vdso_data, xtime_tod_stamp));
+ DEFINE(__VDSO_XTIME_SEC, offsetof(struct vdso_data, xtime_clock_sec));
+ DEFINE(__VDSO_XTIME_NSEC, offsetof(struct vdso_data, xtime_clock_nsec));
+ DEFINE(__VDSO_WTOM_SEC, offsetof(struct vdso_data, wtom_clock_sec));
+ DEFINE(__VDSO_WTOM_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));
+ DEFINE(__VDSO_TIMEZONE, offsetof(struct vdso_data, tz_minuteswest));
+ /* constants used by the vdso */
+ DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
+ DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
+ DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
+
return 0;
}
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