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Commit 5479c78a authored by Cyrill Gorcunov's avatar Cyrill Gorcunov Committed by Tejun Heo
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mm, percpu: Make sure percpu_alloc early parameter has an argument 



Otherwise we are getting a nil dereference if percpu_alloc kernel boot
argument is specified without value.

 | [    0.000000] BUG: unable to handle kernel NULL pointer dereference at           (null)
 | [    0.000000] IP: [<ffffffff81391360>] strcmp+0x10/0x30

Signed-off-by: default avatarCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent b4916cb1

mm/percpu.c

+3 −0
Original line number Diff line number Diff line
@@ -1380,6 +1380,9 @@ enum pcpu_fc pcpu_chosen_fc __initdata = PCPU_FC_AUTO; 


static int __init percpu_alloc_setup(char *str)

{

	if (!str)

		return -EINVAL;



	if (0)

		/* nada */;

#ifdef CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK