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writeback: use RCU to protect bdi_list
authorJens Axboe <jens.axboe@oracle.com>
Mon, 14 Sep 2009 11:12:40 +0000 (13:12 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Wed, 16 Sep 2009 13:18:51 +0000 (15:18 +0200)
Now that bdi_writeback_all() no longer handles integrity writeback,
it doesn't have to block anymore. This means that we can switch
bdi_list reader side protection to RCU.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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