From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 21 Jul 2008 08:49:40 +0000 (+0100)
Subject: Fix debug key t to avoid irq jitter.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14171^2~13
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=6bee9dd132b7c1a333f79e08cb2876aaad2f32de;p=xen.git

Fix debug key t to avoid irq jitter.

From: Dan Magenheimer <dan.magenheimer@oracle.com>
Siigned-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/common/keyhandler.c b/xen/common/keyhandler.c
index 2acd17ae7b..56c59905b2 100644
--- a/xen/common/keyhandler.c
+++ b/xen/common/keyhandler.c
@@ -240,10 +240,12 @@ static s_time_t read_clocks_time[NR_CPUS];
 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)