btrfs: add barrier for waitqueue_active in clear_btree_io_tree

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waitqueue_active should be preceded by a barrier, in this function we
don't need to call it all the time.

Signed-off-by: David Sterba <dsterba@suse.com>

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David Sterba 2015-10-10 18:24:48 +02:00

parent 730d9ec36b

commit b666a9cd99

1 changed files with 6 additions and 0 deletions

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fs/btrfs/transaction.c

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