xen/arm: missing put_cpu in xen_percpu_init

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 <[email protected]> Signed-off-by: Stefano Stabellini <[email protected]>
Baughn · Aug 5, 2013 · 0d7febe · 0d7febe
1 parent 088eef2
commit 0d7febe
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
@@ -170,6 +170,7 @@ static void __init xen_percpu_init(void *unused)
 	per_cpu(xen_vcpu, cpu) = vcpup;
 
 	enable_percpu_irq(xen_events_irq, 0);
+	put_cpu();
 }
 
 static void xen_restart(char str, const char *cmd)