[Xen-changelog] [xen-unstable] x86: Fix time going backwards on CPU frequency change.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir@xxxxxxxxxxxxx>
# Date 1191227545 -3600
# Node ID b3814860d170b29daa8ee79eec3a6de603c68b9d
# Parent  96895c637d27755226d33ddc34fc966bf839bb71
x86: Fix time going backwards on CPU frequency change.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 xen/arch/x86/time.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 96895c637d27 -r b3814860d170 xen/arch/x86/time.c
--- a/xen/arch/x86/time.c       Mon Oct 01 09:32:04 2007 +0100
+++ b/xen/arch/x86/time.c       Mon Oct 01 09:32:25 2007 +0100
@@ -728,11 +728,11 @@ int cpu_frequency_change(u64 freq)
     u64 curr_tsc;
 
     local_irq_disable();
-    set_time_scale(&t->tsc_scale, freq);
     rdtscll(curr_tsc);
     t->local_tsc_stamp = curr_tsc;
     t->stime_local_stamp = get_s_time();
     t->stime_master_stamp = read_platform_stime();
+    set_time_scale(&t->tsc_scale, freq);
     local_irq_enable();
 
     /* A full epoch should pass before we check for deviation. */

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