[RFC PATCH 07/23 -v4] ppc clock accumulate fix

[Steven Rostedt <rostedt@goodmis.org>]

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The following is a quick and dirty fix for powerpc so it includes
cycle_accumulated in its calculation. It relies on the fact that the
powerpc clocksource is a 64bit counter (don't have to worry about
multiple overflows), so the subtraction should be safe.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 arch/powerpc/kernel/time.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-mcount.git/arch/powerpc/kernel/time.c
===================================================================
--- linux-mcount.git.orig/arch/powerpc/kernel/time.c	2008-01-17 20:33:16.000000000 -0500
+++ linux-mcount.git/arch/powerpc/kernel/time.c	2008-01-17 20:33:38.000000000 -0500
@@ -773,7 +773,8 @@ void update_vsyscall(struct timespec *wa
 	stamp_xsec = (u64) xtime.tv_nsec * XSEC_PER_SEC;
 	do_div(stamp_xsec, 1000000000);
 	stamp_xsec += (u64) xtime.tv_sec * XSEC_PER_SEC;
-	update_gtod(clock->cycle_last, stamp_xsec, t2x);
+	update_gtod(clock->cycle_last-clock->cycle_accumulated,
+		    stamp_xsec, t2x);
 }
 
 void update_vsyscall_tz(void)

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