On Fri, Jun 22, 2012 at 07:57:22PM +0800, Wanpeng Li wrote:
> From: Wanpeng Li <liwp@xxxxxxxxxxxxxxxxxx>
>
> Signed-off-by: Wanpeng Li <liwp.linux@xxxxxxxxx>
> ---
> mm/memcontrol.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index f72b5e5..776fc57 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -4873,7 +4873,7 @@ mem_cgroup_create(struct cgroup *cont)
> goto free_out;
>
> /* root ? */
> - if (cont->parent == NULL) {
> + if (!(mem_cgroup_is_root(cont))) {
cont is struct cgroup *, but this function takes struct mem_cgroup *.
The compiler should have warned you about this.
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