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Tue, 02 Sep 2025 14:51:09 -0700 (PDT) X-Relaying-Domain: purestorage.com Received: from dev-csander.dev.purestorage.com (dev-csander.dev.purestorage.com [10.7.70.37]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id 5802D340328; Tue, 2 Sep 2025 15:51:09 -0600 (MDT) Received: by dev-csander.dev.purestorage.com (Postfix, from userid 1557716354) id 4FBB1E4159F; Tue, 2 Sep 2025 15:51:09 -0600 (MDT) From: Caleb Sander Mateos To: Jens Axboe Cc: Caleb Sander Mateos , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] io_uring/register: drop redundant submitter_task check Date: Tue, 2 Sep 2025 15:51:07 -0600 Message-ID: <20250902215108.1925105-1-csander@purestorage.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit For IORING_SETUP_SINGLE_ISSUER io_ring_ctx's, io_register_resize_rings() checks that the current task is the ctx's submitter_task. However, its caller __io_uring_register() already checks this. Drop the redundant check in io_register_resize_rings(). Signed-off-by: Caleb Sander Mateos --- io_uring/register.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/io_uring/register.c b/io_uring/register.c index a1a9b2884eae..aa5f56ad8358 100644 --- a/io_uring/register.c +++ b/io_uring/register.c @@ -406,14 +406,10 @@ static int io_register_resize_rings(struct io_ring_ctx *ctx, void __user *arg) size_t size, sq_array_offset; unsigned i, tail, old_head; struct io_uring_params p; int ret; - /* for single issuer, must be owner resizing */ - if (ctx->flags & IORING_SETUP_SINGLE_ISSUER && - current != ctx->submitter_task) - return -EEXIST; /* limited to DEFER_TASKRUN for now */ if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN)) return -EINVAL; if (copy_from_user(&p, arg, sizeof(p))) return -EFAULT; -- 2.45.2