linux-kernel - [PATCH] drm/tiny: fix printk format string for 32-bit

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Message-Id: <20250304142711.621330-1-arnd@kernel.org>
Date: Tue,  4 Mar 2025 15:27:02 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Aun-Ali Zaidi <admin@...eit.net>,
	Aditya Garg <gargaditya08@...e.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Atharva Tiwari <evepolonium@...il.com>,
	Kerem Karabay <kekrby@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/tiny: fix printk format string for 32-bit

From: Arnd Bergmann <arnd@...db.de>

A size_t must be printed with the %z modifier instead of %l:

In file included from include/linux/device.h:15,
                 from include/linux/usb.h:19,
                 from drivers/gpu/drm/tiny/appletbdrm.c:19:
drivers/gpu/drm/tiny/appletbdrm.c: In function 'appletbdrm_send_request':
include/drm/drm_print.h:589:54: error: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Werror=format=]
drivers/gpu/drm/tiny/appletbdrm.c:170:17: note: in expansion of macro 'drm_err'
  170 |                 drm_err(drm, "Actual size (%d) doesn't match expected size (%lu)\n",
      |                 ^~~~~~~
drivers/gpu/drm/tiny/appletbdrm.c: In function 'appletbdrm_read_response':
include/drm/drm_print.h:589:54: error: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Werror=format=]
drivers/gpu/drm/tiny/appletbdrm.c:211:17: note: in expansion of macro 'drm_err'
  211 |                 drm_err(drm, "Actual size (%d) doesn't match expected size (%lu)\n",
      |                 ^~~~~~~

Fixes: 0670c2f56e45 ("drm/tiny: add driver for Apple Touch Bars in x86 Macs")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/tiny/appletbdrm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tiny/appletbdrm.c b/drivers/gpu/drm/tiny/appletbdrm.c
index f5d177e234e4..394c8f9bd41a 100644
--- a/drivers/gpu/drm/tiny/appletbdrm.c
+++ b/drivers/gpu/drm/tiny/appletbdrm.c
@@ -167,7 +167,7 @@ static int appletbdrm_send_request(struct appletbdrm_device *adev,
 	}
 
 	if (actual_size != size) {
-		drm_err(drm, "Actual size (%d) doesn't match expected size (%lu)\n",
+		drm_err(drm, "Actual size (%d) doesn't match expected size (%zu)\n",
 			actual_size, size);
 		return -EIO;
 	}
@@ -208,7 +208,7 @@ static int appletbdrm_read_response(struct appletbdrm_device *adev,
 	}
 
 	if (actual_size != size) {
-		drm_err(drm, "Actual size (%d) doesn't match expected size (%lu)\n",
+		drm_err(drm, "Actual size (%d) doesn't match expected size (%zu)\n",
 			actual_size, size);
 		return -EBADMSG;
 	}
-- 
2.39.5