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SubjectRe: [PATCH] Fix uninitialized variable use in mm/memcontrol.c::mem_cgroup_move_parent()
On Sat, 22 Jan 2011 20:51:32 +0100 (CET)
Jesper Juhl <> wrote:

> In mm/memcontrol.c::mem_cgroup_move_parent() there's a path that jumps to
> the 'put_back' label
> ret = __mem_cgroup_try_charge(NULL, gfp_mask, &parent, false, charge);
> if (ret || !parent)
> goto put_back;
> where we'll
> if (charge > PAGE_SIZE)
> compound_unlock_irqrestore(page, flags);
> but, we have not assigned anything to 'flags' at this point, nor have we
> called 'compound_lock_irqsave()' (which is what sets 'flags').
> So, I believe the 'put_back' label should be moved below the call to
> compound_unlock_irqrestore() as per this patch.
> Signed-off-by: Jesper Juhl <>

Thank you.

Acked-by: KAMEZAWA Hiroyuki <>

Andrew, I'll move my new patces onto this. So, please pick this one 1st.

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