This is a note to let you know that I've just added the patch titled
xen/arm: missing put_cpu in xen_percpu_init
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xen-arm-missing-put_cpu-in-xen_percpu_init.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0d7febe58413884f6428143221971618fbf3a47d Mon Sep 17 00:00:00 2001
From: Julien Grall <julien.grall@xxxxxxxxxx>
Date: Mon, 29 Jul 2013 17:06:05 +0100
Subject: xen/arm: missing put_cpu in xen_percpu_init
From: Julien Grall <julien.grall@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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)
Patches currently in stable-queue which might be from julien.grall@xxxxxxxxxx are
queue-3.10/xen-arm-missing-put_cpu-in-xen_percpu_init.patch
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