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

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

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.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@arndb.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

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

[Aditya Garg]

Hi

> On 4 Mar 2025, at 7:57 PM, Arnd Bergmann <arnd@kernel.org> wrote:
> 
> From: Arnd Bergmann <arnd@arndb.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@arndb.de>
> —

Its the duplicate of:

https://lore.kernel.org/dri-devel/20250304-appletbdrm-fix-size_t-specifier-v1-1-94fe1d2c91f8@kernel.org/

as well as

https://lore.kernel.org/dri-devel/20250304135456.429407-1-jani.nikula@intel.com/

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

[Jani Nikula]

On Tue, 04 Mar 2025, Aditya Garg <gargaditya08@live.com> wrote:
> Hi
>
>> On 4 Mar 2025, at 7:57 PM, Arnd Bergmann <arnd@kernel.org> wrote:
>> 
>> From: Arnd Bergmann <arnd@arndb.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@arndb.de>
>> —
>
> Its the duplicate of:
>
> https://lore.kernel.org/dri-devel/20250304-appletbdrm-fix-size_t-specifier-v1-1-94fe1d2c91f8@kernel.org/

Pushed this one to drm-misc-next.

BR,
Jani.

>
> as well as
>
> https://lore.kernel.org/dri-devel/20250304135456.429407-1-jani.nikula@intel.com/
>
>

-- 
Jani Nikula, Intel