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163ba35ff3
linux/drivers/gpu/drm/tilcdc
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Masahiro Yamada 163ba35ff3 doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags from command line 
You should use KCFLAGS to pass additional compiler flags from the
command line. Using EXTRA_CFLAGS is wrong.

EXTRA_CFLAGS is supposed to specify flags applied only to the current
Makefile (and now deprecated in favor of ccflags-y).

It is still used in arch/mips/kvm/Makefile (and possibly in external
modules too). Passing EXTRA_CFLAGS from the command line overwrites
it and breaks the build.

I also fixed drivers/gpu/drm/tilcdc/Makefile because commit 816175dd1f
("drivers/gpu/drm/tilcdc: Makefile, only -Werror when no -W* in
EXTRA_CFLAGS") was based on the same misunderstanding.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Alex Shi <alex.shi@linux.alibaba.com>
Acked-by: Federico Vaga <federico.vaga@vaga.pv.it>
Link: https://lore.kernel.org/r/20210221152524.197693-1-masahiroy@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-02-22 13:59:10 -07:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags from command line 2021-02-22 13:59:10 -07:00
tilcdc_crtc.c drm: Use the state pointer directly in atomic_check 2020-11-03 12:20:09 +01:00
tilcdc_drv.c drm/<drivers>: Constify struct drm_driver 2020-11-06 10:31:26 +01:00
tilcdc_drv.h drm/tilcdc: Remove tilcdc_crtc_max_width(), use private data 2020-10-10 20:02:14 +03:00
tilcdc_external.c drm/tilcdc: Use simple encoder 2020-04-02 14:16:45 +02:00
tilcdc_external.h drm/tilcdc: Remove obsolete crtc_mode_valid() hack 2019-08-02 16:00:42 +03:00
tilcdc_panel.c drm/tilcdc: add missing static for panel_driver 2020-05-19 09:56:58 +03:00
tilcdc_panel.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
tilcdc_plane.c drm/tilcdc: Use standard drm_atomic_helper_commit 2020-07-14 10:32:33 +02:00
tilcdc_regs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00