tree b982e728eafeebc226882f91482ff7d0d9ee5cc3
parent 8f58202bf6b915656e116ece3bc4ace14bfe533a
author Benjamin LaHaise <bcrl@linux.intel.com> 1126296129 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1126299452 -0700

[PATCH] aio: kiocb locking to serialise retry and cancel

Implement a per-kiocb lock to serialise retry operations and cancel.  This
is done using wait_on_bit_lock() on the KIF_LOCKED bit of kiocb->ki_flags.
Also, make the cancellation path lock the kiocb and subsequently release
all references to it if the cancel was successful.  This version includes a
fix for the deadlock with __aio_run_iocbs.

Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>