linux-kernel - [PATCH v7 3/3] io_uring/register: drop io_register_enable_rings() submitter

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Message-ID: <20260105210543.3471082-4-csander@purestorage.com>
Date: Mon,  5 Jan 2026 14:05:42 -0700
From: Caleb Sander Mateos <csander@...estorage.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: Joanne Koong <joannelkoong@...il.com>,
	io-uring@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Caleb Sander Mateos <csander@...estorage.com>
Subject: [PATCH v7 3/3] io_uring/register: drop io_register_enable_rings() submitter_task check

io_register_enable_rings() checks that the io_ring_ctx is
IORING_SETUP_R_DISABLED, which ensures submitter_task hasn't been
assigned by io_uring_create() or a previous io_register_enable_rings()
call. So drop the redundant check that submitter_task is NULL.

Signed-off-by: Caleb Sander Mateos <csander@...estorage.com>
---
 io_uring/register.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/register.c b/io_uring/register.c
index 8104728af294..78434869270c 100644
--- a/io_uring/register.c
+++ b/io_uring/register.c
@@ -178,11 +178,11 @@ static __cold int io_register_restrictions(struct io_ring_ctx *ctx,
 static int io_register_enable_rings(struct io_ring_ctx *ctx)
 {
 	if (!(ctx->flags & IORING_SETUP_R_DISABLED))
 		return -EBADFD;
 
-	if (ctx->flags & IORING_SETUP_SINGLE_ISSUER && !ctx->submitter_task) {
+	if (ctx->flags & IORING_SETUP_SINGLE_ISSUER) {
 		ctx->submitter_task = get_task_struct(current);
 		/*
 		 * Lazy activation attempts would fail if it was polled before
 		 * submitter_task is set.
 		 */
-- 
2.45.2