lkml.org 
[lkml]   [2013]   [Sep]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[ 34/36] xen/arm: missing put_cpu in xen_percpu_init
Date
3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Julien Grall <julien.grall@linaro.org>

commit 0d7febe58413884f6428143221971618fbf3a47d upstream.

When CONFIG_PREEMPT is enabled, Linux will not be able to boot and warn:
[ 4.127825] ------------[ cut here ]------------
[ 4.133376] WARNING: at init/main.c:699 do_one_initcall+0x150/0x158()
[ 4.140738] initcall xen_init_events+0x0/0x10c returned with preemption imbalance

This is because xen_percpu_init uses get_cpu but doesn't have the corresponding
put_cpu.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm/xen/enlighten.c | 1 +
1 file changed, 1 insertion(+)

--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -170,6 +170,7 @@ static void __init xen_percpu_init(void
per_cpu(xen_vcpu, cpu) = vcpup;

enable_percpu_irq(xen_events_irq, 0);
+ put_cpu();
}

static void xen_restart(char str, const char *cmd)



\
 
 \ /
  Last update: 2013-09-05 23:01    [W:0.212 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site