linux-kernel - [PATCH 2/2] drm/rockchip: replace use of system_wq with system_percpu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251031104846.119503-3-marco.crivellari@suse.com>
Date: Fri, 31 Oct 2025 11:48:46 +0100
From: Marco Crivellari <marco.crivellari@...e.com>
To: linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org
Cc: Tejun Heo <tj@...nel.org>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Marco Crivellari <marco.crivellari@...e.com>,
	Michal Hocko <mhocko@...e.com>,
	Sandy Huang <hjc@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	Andy Yan <andy.yan@...k-chips.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>
Subject: [PATCH 2/2] drm/rockchip: replace use of system_wq with system_percpu_wq

Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.

This lack of consistency cannot be addressed without refactoring the API.

system_wq should be the per-cpu workqueue, yet in this name nothing makes
that clear, so replace system_wq with system_percpu_wq.

The old wq (system_wq) will be kept for a few release cycles.

Suggested-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@...e.com>
---
 drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
index ed6e8f036f4b..deeeface0b63 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
@@ -276,7 +276,7 @@ static irqreturn_t dw_hdmi_qp_rk3576_irq(int irq, void *dev_id)
 
 	val = FIELD_PREP_WM16(RK3576_HDMI_HPD_INT_CLR, 1);
 	regmap_write(hdmi->regmap, RK3576_IOC_MISC_CON0, val);
-	mod_delayed_work(system_wq, &hdmi->hpd_work,
+	mod_delayed_work(system_percpu_wq, &hdmi->hpd_work,
 			 msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS));
 
 	val = FIELD_PREP_WM16(RK3576_HDMI_HPD_INT_MSK, 0);
@@ -319,7 +319,7 @@ static irqreturn_t dw_hdmi_qp_rk3588_irq(int irq, void *dev_id)
 		val = FIELD_PREP_WM16(RK3588_HDMI0_HPD_INT_CLR, 1);
 	regmap_write(hdmi->regmap, RK3588_GRF_SOC_CON2, val);
 
-	mod_delayed_work(system_wq, &hdmi->hpd_work,
+	mod_delayed_work(system_percpu_wq, &hdmi->hpd_work,
 			 msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS));
 
 	if (hdmi->port_id)
-- 
2.51.0