From 6878b40e7b28bd780dedb7d505c13dbf82b73290 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 24 Sep 2021 21:59:41 +0100 Subject: [PATCH] io_uring: mark having different creds unlikely 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 Link: https://lore.kernel.org/r/e7815251ac4bf5a4a23d298c752f029ae19f3837.1632516769.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 3ced6a7..bda302b 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -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) { -- 2.7.4