[Xen-changelog] [xen-unstable] Fix debug key t to avoid irq jitter.

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1216630180 -3600
# Node ID c433ee4844fbb0c62f6efb229d73ea822e061eb7
# Parent  34ad9e2c0d10a24b7e66eaaed9862843d9075cf7
Fix debug key t to avoid irq jitter.

From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Siigned-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/common/keyhandler.c |    2 ++
 1 files changed, 2 insertions(+)

diff -r 34ad9e2c0d10 -r c433ee4844fb xen/common/keyhandler.c
--- a/xen/common/keyhandler.c   Mon Jul 21 09:47:07 2008 +0100
+++ b/xen/common/keyhandler.c   Mon Jul 21 09:49:40 2008 +0100
@@ -240,10 +240,12 @@ static void read_clocks_slave(void *unus
 static void read_clocks_slave(void *unused)
 {
     unsigned int cpu = smp_processor_id();
+    local_irq_disable();
     while ( !cpu_isset(cpu, read_clocks_cpumask) )
         cpu_relax();
     read_clocks_time[cpu] = NOW();
     cpu_clear(cpu, read_clocks_cpumask);
+    local_irq_enable();
 }
 
 static void read_clocks(unsigned char key)

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