2.6.22 changed the vsyscall mechanism to store a more cache-thrash
friendly version of the gtod data. The original gtod cache code used an
entire struct clock + structure-copy, whereas the new code uses a
pseudo/shadow version + explicit-copy.
clock.cycle_accumulated was added to RT prior to 2.6.22 so the vsyscall
code must also be updated for the port to 22.
Signed-off-by: Gregory Haskins <ghaskins@xxxxxxxxxx>
---
vsyscall.c | 1 +
1 file changed, 1 insertion(+)
--- linux-2.6.22.orig/arch/x86_64/kernel/vsyscall.c
+++ linux-2.6.22/arch/x86_64/kernel/vsyscall.c
@@ -90,6 +90,7 @@ void update_vsyscall(struct timespec *wa
/* copy vsyscall data */
vsyscall_gtod_data.clock.vread = clock->vread;
vsyscall_gtod_data.clock.cycle_last = clock->cycle_last;
+ vsyscall_gtod_data.clock.cycle_accumulated =
clock->cycle_accumulated;
vsyscall_gtod_data.clock.mask = clock->mask;
vsyscall_gtod_data.clock.mult = clock->mult;
vsyscall_gtod_data.clock.shift = clock->shift;
-
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