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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-09-24 21:59:41 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-19 05:49:53 -0600 |
| commit | 6878b40e7b28bd780dedb7d505c13dbf82b73290 (patch) | |
| tree | e229f061f5f1721d1ee7e0267391768d26640a0e /fs/io_uring.c | |
| parent | 8d4af6857c6fb5b1922218e93052bee29eb540f4 (diff) | |
| download | lwn-6878b40e7b28bd780dedb7d505c13dbf82b73290.tar.gz lwn-6878b40e7b28bd780dedb7d505c13dbf82b73290.zip | |
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 <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>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 3ced6a7bdf2b..bda302bedeef 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) { |