linux-kernel - Re: [PATCH] drm/xe: skip building debugfs code for CONFIG_DEBUG

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Message-Id: <17209419-093b-4674-8b43-06c92312ef61@app.fastmail.com>
Date: Tue, 13 Feb 2024 15:58:54 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Jani Nikula" <jani.nikula@...ux.intel.com>,
 "Arnd Bergmann" <arnd@...nel.org>,
 "Lucas De Marchi" <lucas.demarchi@...el.com>,
 "Oded Gabbay" <ogabbay@...nel.org>,
 Thomas Hellström <thomas.hellstrom@...ux.intel.com>
Cc: "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
 "Maxime Ripard" <mripard@...nel.org>,
 "Thomas Zimmermann" <tzimmermann@...e.de>, "Dave Airlie" <airlied@...il.com>,
 "Daniel Vetter" <daniel@...ll.ch>, "Rodrigo Vivi" <rodrigo.vivi@...el.com>,
 "Matt Roper" <matthew.d.roper@...el.com>,
 "Matthew Brost" <matthew.brost@...el.com>,
 "Riana Tauro" <riana.tauro@...el.com>,
 "Daniele Ceraolo Spurio" <daniele.ceraolospurio@...el.com>,
 intel-xe@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/xe: skip building debugfs code for CONFIG_DEBUG_FS=n

On Tue, Feb 13, 2024, at 15:55, Jani Nikula wrote:
> On Tue, 13 Feb 2024, Arnd Bergmann <arnd@...nel.org> wrote:
>> From: Arnd Bergmann <arnd@...db.de>
>>
>> Some of the debugfs functions are stubbed out in these configurations,
>> so trying to build the .c file with the definition fails:
>>
>> In file included from include/uapi/linux/posix_types.h:5,
>>                  from drivers/gpu/drm/i915/display/intel_pipe_crc.c:27:
>> drivers/gpu/drm/i915/display/intel_pipe_crc.c: At top level:
>> include/linux/stddef.h:8:16: error: expected identifier or '(' before 'void'
>>     8 | #define NULL ((void *)0)
>>       |                ^~~~
>> drivers/gpu/drm/i915/display/intel_pipe_crc.c:549:20: note: in expansion of macro 'intel_crtc_get_crc_sources'
>>   549 | const char *const *intel_crtc_get_crc_sources(struct drm_crtc *crtc,
>>       |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> Stop trying to build them by making the Makefile entries conditional,
>> same as for the i915 driver.
>
> Already fixed by commit 439987f6f471 ("drm/xe: don't build debugfs files
> when CONFIG_DEBUG_FS=n") in drm-xe-next.
>
> Maybe that needs to be picked up for -fixes?

I made sure that this still happens in linux-next today, but
it does not seem to contain 439987f6f471.

     Arnd