Re: [PATCH] pagemap: remove remaining unneeded spin_lock()

[Andrea Arcangeli]

On Thu, Mar 29, 2012 at 04:39:39AM -0400, Naoya Horiguchi wrote:
> commit: 025c5b2451e4 "thp: optimize away unnecessary page table locking"
> moves spin_lock() into pmd_trans_huge_lock() in order to avoid locking
> unless pmd is for thp. So this spin_lock() is a bug.
> 
> Reported-by: Sasha Levin <levinsasha928@xxxxxxxxx>
> Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
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