tree c7a3e25787f7350fc3b48350de5b3622ac265329
parent c213dc826c591cec9e1a458f17ae474af6c8e00c
author Christoph Hellwig <hch@lst.de> 1523278676 +0200
committer Christoph Hellwig <hch@lst.de> 1525283579 +0200

aio: sanitize ki_list handling

Instead of handcoded non-null checks always initialize ki_list to an
empty list and use list_empty / list_empty_careful on it.  While we're
at it also error out on a double call to kiocb_set_cancel_fn instead
of ignoring it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>