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

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 <redacted>
Signed-off-by: Naoya Horiguchi <redacted>
Cc: stable@vger.kernel.org

Reviewed-by: Andrea Arcangeli <redacted>

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