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(parent: 7dda712) | patch
aio: add a iocb refcount
authorChristoph Hellwig <hch@lst.de>
Tue, 24 Jul 2018 09:36:37 +0000 (11:36 +0200)
committerChristoph Hellwig <hch@lst.de>
Mon, 6 Aug 2018 08:24:28 +0000 (10:24 +0200)
commit9018ccc453af063d16b3b6b5dfa2ad0635390371
tree5a1f3fea68ac2e1c2aabc0d1c42bf73b32785014tree | snapshot
parent7dda712818373d4d8ecc5dca2293664fcd3b0158commit | diff
aio: add a iocb refcount

This is needed to prevent races caused by the way the ->poll API works.
To avoid introducing overhead for other users of the iocbs we initialize
it to zero and only do refcount operations if it is non-zero in the
completion path.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Avi Kivity <avi@scylladb.com>
fs/aio.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git