Commit 9ba6a1c0 authored Jun 24, 2021 by Pavel Begunkov Committed by Jens Axboe Jun 30, 2021

io_uring: simplify struct io_uring_sqe layout

Flatten struct io_uring_sqe, the last union is exactly 64B, so move them
out of union { struct { ... }}, and decrease __pad2 size.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2e21ef7aed136293d654450bc3088973a8adc730.1624543113.git.asml.silence@gmail.com

Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 16340eab

include/uapi/linux/io_uring.h

+10 −14

Original line number	Diff line number	Diff line
		@@ -46,8 +46,6 @@ struct io_uring_sqe {
		__u32 unlink_flags;
		};
		__u64 user_data; /* data to be passed back at completion time */
		union {
		struct {
		/* pack this to avoid bogus arm OABI complaints */
		union {
		/* index into fixed buffers, if used */
		@@ -58,9 +56,7 @@ struct io_uring_sqe {
		/* personality to use, if used */
		__u16 personality;
		__s32 splice_fd_in;
		};
		__u64 __pad2[3];
		};
		__u64 __pad2[2];
		};

		enum {