Commits
Al Viro committed 9061d14a8a9
aio: all callers of aio_{read,write,fsync,poll} treat 0 and -EIOCBQUEUED the same way
... so just make them return 0 when caller does not need to destroy iocb
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>