dax: Avoid losing wakeup in dax_lock_mapping_entry
commit 25bbe21bf427a81b8e3ccd480ea0e1d940256156 upstream. After calling get_unlocked_entry(), you have to call put_unlocked_entry() to avoid subsequent waiters losing wakeups. Fixes: c2a7d2a1 ("filesystem-dax: Introduce dax_lock_mapping_entry()") Cc: stable@vger.kernel.org Signed-off-by: NMatthew Wilcox <willy@infradead.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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