From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 25 Aug 2008 13:03:42 +0000 (+0100)
Subject: x86: Time rendezvous function does not need to disable/enable IRQs.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14113^2~50
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22Dat/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22Dat?a=commitdiff_plain;h=84cc74d90ff496581636b70d480916d3668c4533;p=xen.git

x86: Time rendezvous function does not need to disable/enable IRQs.
Since rendezvous happens within the IPI handler, no need to specify
'wait' to on_each_cpu().

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index 74c9d04327..6cbea185cf 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1004,8 +1004,6 @@ static void time_calibration_rendezvous(void *_r)
     struct cpu_calibration *c = &this_cpu(cpu_calibration);
     struct calibration_rendezvous *r = _r;
 
-    local_irq_disable();
-
     if ( smp_processor_id() == 0 )
     {
         while ( atomic_read(&r->nr_cpus) != (total_cpus - 1) )
@@ -1024,8 +1022,6 @@ static void time_calibration_rendezvous(void *_r)
     c->stime_local_stamp = get_s_time();
     c->stime_master_stamp = r->master_stime;
 
-    local_irq_enable();
-
     /* Callback in softirq context as soon as possible. */
     set_timer(&c->softirq_callback, c->stime_local_stamp);
 }
@@ -1036,7 +1032,7 @@ static void time_calibration(void *unused)
         .nr_cpus = ATOMIC_INIT(0)
     };
 
-    on_each_cpu(time_calibration_rendezvous, &r, 0, 1);
+    on_each_cpu(time_calibration_rendezvous, &r, 0, 0);
 }
 
 void init_percpu_time(void)