> No need for VM_BUG_ON(pc), since 'pc' is the list entry. This should
> be VM_BUG_ON(page).
> 
> Signed-off-by: Li Zefan <[EMAIL PROTECTED]>
> Acked-by: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]>
> ---
>  mm/memcontrol.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 6bded84..c2959ee 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -534,7 +534,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long 
> nr_to_scan,
>               if (scan >= nr_to_scan)
>                       break;
>               page = pc->page;
> -             VM_BUG_ON(!pc);
> +             VM_BUG_ON(!page);

can't page be NULL here if mem_cgroup_uncharge clears pc->page behind us?
ie. bug.

YAMAMOTO Takashi
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