Commit 25bbe21b authored Nov 16, 2018 by Matthew Wilcox

dax: Avoid losing wakeup in dax_lock_mapping_entry



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: Matthew Wilcox <willy@infradead.org>

parent 0e40de03

fs/dax.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -391,6 +391,7 @@ bool dax_lock_mapping_entry(struct page *page)
		rcu_read_unlock();
		entry = get_unlocked_entry(&xas);
		xas_unlock_irq(&xas);
		put_unlocked_entry(&xas, entry);
		rcu_read_lock();
		continue;
		}

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