io_uring/rsrc: kill rsrc_ref_lock

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We use ->rsrc_ref_lock spinlock to protect ->rsrc_ref_list in
io_rsrc_node_ref_zero(). Now we removed pcpu refcounting, which means
io_rsrc_node_ref_zero() is not executed from the irq context as an RCU
callback anymore, and we also put it under ->uring_lock.
io_rsrc_node_switch(), which queues up nodes into the list, is also
protected by ->uring_lock, so we can safely get rid of ->rsrc_ref_lock.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/6b60af883c263551190b526a55ff2c9d5ae07141.1680576071.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2023-04-04 13:39:50 +01:00 • committed by Jens Axboe

parent ef8ae64ffa

commit 0a4813b1ab

3 changed files with 1 additions and 7 deletions

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2

include/linux/io_uring_types.h

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1

io_uring/io_uring.c

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5

io_uring/rsrc.c

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