提交 5479c78a 编写于 作者: C Cyrill Gorcunov 提交者: Tejun Heo

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: NCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: NTejun Heo <tj@kernel.org>
上级 b4916cb1
......@@ -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
......
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