netdev - [PATCH io_uring for-6.18 02/20] io_uring/zcrx: replace memchar_inv with is

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Message-ID: <1464bccfdbd45ff98c875c7086bbc67e14386ae7.1758030357.git.asml.silence@gmail.com>
Date: Tue, 16 Sep 2025 15:27:45 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: io-uring@...r.kernel.org
Cc: asml.silence@...il.com,
	axboe@...nel.dk,
	netdev@...r.kernel.org
Subject: [PATCH io_uring for-6.18 02/20] io_uring/zcrx: replace memchar_inv with is_zero

memchr_inv() is more ambiguous than mem_is_zero(), so use the latter
for zero checks.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 io_uring/zcrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index c02045e4c1b6..a4a0560e8269 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -566,7 +566,7 @@ int io_register_zcrx_ifq(struct io_ring_ctx *ctx,
 		return -EFAULT;
 	if (copy_from_user(&rd, u64_to_user_ptr(reg.region_ptr), sizeof(rd)))
 		return -EFAULT;
-	if (memchr_inv(&reg.__resv, 0, sizeof(reg.__resv)) ||
+	if (!mem_is_zero(&reg.__resv, sizeof(reg.__resv)) ||
 	    reg.__resv2 || reg.zcrx_id)
 		return -EINVAL;
 	if (reg.if_rxq == -1 || !reg.rq_entries || reg.flags)
-- 
2.49.0