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From: Marco Crivellari <marco.crivellari@suse.com>
To: linux-kernel@vger.kernel.org
Cc: Tejun Heo <tj@kernel.org>, Lai Jiangshan <jiangshanlai@gmail.com>,
	Frederic Weisbecker <frederic@kernel.org>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Marco Crivellari <marco.crivellari@suse.com>,
	Michal Hocko <mhocko@suse.com>,
	Matt Porter <mporter@kernel.crashing.org>,
	Alexandre Bounine <alex.bou9@gmail.com>
Subject: [PATCH 5/6] rapidio: rio: add WQ_PERCPU to alloc_workqueue users
Date: Tue,  5 May 2026 14:41:01 +0200	[thread overview]
Message-ID: <20260505124113.214297-6-marco.crivellari@suse.com> (raw)
In-Reply-To: <20260505124113.214297-1-marco.crivellari@suse.com>

This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:

   commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.

With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.

In order to keep alloc_workqueue() behavior identical, explicitly request
WQ_PERCPU.

Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
---
 drivers/rapidio/rio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index 0c175e6d424f..f45e58b0971f 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -1994,7 +1994,7 @@ int rio_init_mports(void)
 	 * TODO: Implement restart of discovery process for all or
 	 * individual discovering mports.
 	 */
-	rio_wq = alloc_workqueue("riodisc", 0, 0);
+	rio_wq = alloc_workqueue("riodisc", WQ_PERCPU, 0);
 	if (!rio_wq) {
 		pr_err("RIO: unable allocate rio_wq\n");
 		goto no_disc;
-- 
2.53.0


  parent reply	other threads:[~2026-05-05 12:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-05 12:40 [PATCH 0/6] Add WQ_PERCPU to alloc_workqueue users and workqueue replacement Marco Crivellari
2026-05-05 12:40 ` [PATCH 1/6] virt: acrn: Add WQ_PERCPU to alloc_workqueue users Marco Crivellari
2026-05-05 12:40 ` [PATCH 2/6] media: synopsys: hdmirx: replace use of system_unbound_wq with system_dfl_wq Marco Crivellari
2026-05-05 12:40 ` [PATCH 3/6] platform: cznic: turris-omnia-mcu: replace use of system_wq with system_percpu_wq Marco Crivellari
2026-05-05 14:22   ` Marek Behún
2026-05-05 12:41 ` [PATCH 4/6] media: ddbridge: add WQ_PERCPU to alloc_workqueue users Marco Crivellari
2026-05-05 12:41 ` Marco Crivellari [this message]
2026-05-05 12:41 ` [PATCH 6/6] umh: replace use of system_unbound_wq with system_dfl_wq Marco Crivellari
2026-05-05 17:16 ` [PATCH 0/6] Add WQ_PERCPU to alloc_workqueue users and workqueue replacement Tejun Heo
2026-05-05 21:47   ` Frederic Weisbecker
2026-05-06  6:35   ` Marco Crivellari

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