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io_uring: mark having different creds unlikely

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Hint the compiler that it's not as likely to have creds different from
current attached to a request. The current code generation is far from
ideal, hopefully it can help to some compilers to remove duplicated jump
tables and so.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e7815251ac4bf5a4a23d298c752f029ae19f3837.1632516769.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-09-24 21:59:41 +01:00 committed by Jens Axboe
parent 8d4af6857c
commit 6878b40e7b
1 changed files with 1 additions and 1 deletions
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2
fs/io_uring.c
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@ -6638,7 +6638,7 @@ static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags)
const struct cred *creds = NULL;
int ret;
if ((req->flags & REQ_F_CREDS) && req->creds != current_cred())
if (unlikely((req->flags & REQ_F_CREDS) && req->creds != current_cred()))
creds = override_creds(req->creds);
switch (req->opcode) {