From: Pavel Begunkov <asml.silence@gmail.com>
Date: Sat, 19 Apr 2025 17:47:06 +0000 (+0100)
Subject: io_uring/rsrc: remove null check on import
X-Git-Tag: v6.16-rc1~215^2~50
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be6bad57b217491733754ae8113eec94a90a2769;p=thirdparty%2Flinux.git

io_uring/rsrc: remove null check on import

WARN_ON_ONCE() checking imu for NULL in io_import_fixed() is in the hot
path and too protective, it's time to get rid of it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/3782c01e311dbd474bca45aefaf79a2f2822fafb.1745083025.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 5d25f3391650c..b4c5f3ee88554 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -1058,8 +1058,6 @@ static int io_import_fixed(int ddir, struct iov_iter *iter,
 	size_t offset;
 	int ret;
 
-	if (WARN_ON_ONCE(!imu))
-		return -EFAULT;
 	ret = validate_fixed_range(buf_addr, len, imu);
 	if (unlikely(ret))
 		return ret;