linux-kernel - Re: [PATCH v2] drm: prefix header search paths with $(srctree)/

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Message-ID: <20190329120149.GA16140@james-ThinkStation-P300>
Date:   Fri, 29 Mar 2019 12:01:56 +0000
From:   "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
CC:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Sam Ravnborg <sam@...nborg.org>, Sean Paul <sean@...rly.run>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>,
        "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Alex Deucher <alexander.deucher@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        Rob Clark <robdclark@...il.com>,
        Christian König <christian.koenig@....com>,
        Zhi Wang <zhi.a.wang@...el.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        Ben Skeggs <bskeggs@...hat.com>,
        Brian Starkey <Brian.Starkey@....com>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        Liviu Dudau <Liviu.Dudau@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        "freedreno@...ts.freedesktop.org" <freedreno@...ts.freedesktop.org>,
        nd <nd@....com>
Subject: Re: [PATCH v2] drm: prefix header search paths with $(srctree)/

On Fri, Mar 29, 2019 at 08:32:41PM +0900, Masahiro Yamada wrote:
> Currently, the Kbuild core manipulates header search paths in a crazy
> way [1].
> 
> To fix this mess, I want all Makefiles to add explicit $(srctree)/ to
> the search paths in the srctree. Some Makefiles are already written in
> that way, but not all. The goal of this work is to make the notation
> consistent, and finally get rid of the gross hacks.
> 
> Having whitespaces after -I does not matter since commit 48f6e3cf5bc6
> ("kbuild: do not drop -I without parameter").
> 
> [1]: https://patchwork.kernel.org/patch/9632347/
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Reviewed-by: Sam Ravnborg <sam@...nborg.org>
> ---
> 
> I put all gpu/drm changes into a single patch because
> they are trivial conversion.
> 
> If you are interested in the big picture of this work,
> the full patch set is available at the following URL.
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git build-test
> 
> 
> Changes in v2:
>   - fix up the new driver komeda
>   - Add Sam's Reviewed-by
> 
>  drivers/gpu/drm/amd/amdgpu/Makefile         | 2 +-
>  drivers/gpu/drm/amd/lib/Makefile            | 2 +-
>  drivers/gpu/drm/arm/display/komeda/Makefile | 4 ++--
>  drivers/gpu/drm/i915/gvt/Makefile           | 2 +-
>  drivers/gpu/drm/msm/Makefile                | 6 +++---
>  drivers/gpu/drm/nouveau/Kbuild              | 8 ++++----
>  6 files changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
> index 466da59..62bf9da 100644
> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
> @@ -23,7 +23,7 @@
>  # Makefile for the drm device driver.  This driver provides support for the
>  # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
>  
> -FULL_AMD_PATH=$(src)/..
> +FULL_AMD_PATH=$(srctree)/$(src)/..
>  DISPLAY_FOLDER_NAME=display
>  FULL_AMD_DISPLAY_PATH = $(FULL_AMD_PATH)/$(DISPLAY_FOLDER_NAME)
>  
> diff --git a/drivers/gpu/drm/amd/lib/Makefile b/drivers/gpu/drm/amd/lib/Makefile
> index 6902430..d534992 100644
> --- a/drivers/gpu/drm/amd/lib/Makefile
> +++ b/drivers/gpu/drm/amd/lib/Makefile
> @@ -27,6 +27,6 @@
>  # driver components or later moved to kernel/lib for sharing with
>  # other drivers.
>  
> -ccflags-y := -I$(src)/../include
> +ccflags-y := -I $(srctree)/$(src)/../include
>  
>  obj-$(CONFIG_CHASH) += chash.o
> diff --git a/drivers/gpu/drm/arm/display/komeda/Makefile b/drivers/gpu/drm/arm/display/komeda/Makefile
> index 1b875e5..a72e30c 100644
> --- a/drivers/gpu/drm/arm/display/komeda/Makefile
> +++ b/drivers/gpu/drm/arm/display/komeda/Makefile
> @@ -1,8 +1,8 @@
>  # SPDX-License-Identifier: GPL-2.0
>  
>  ccflags-y := \
> -	-I$(src)/../include \
> -	-I$(src)
> +	-I $(srctree)/$(src)/../include \
> +	-I $(srctree)/$(src)
>  
>  komeda-y := \
>  	komeda_drv.o \
> diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile
> index 271fb46..ea8324a 100644
> --- a/drivers/gpu/drm/i915/gvt/Makefile
> +++ b/drivers/gpu/drm/i915/gvt/Makefile
> @@ -5,5 +5,5 @@ GVT_SOURCE := gvt.o aperture_gm.o handlers.o vgpu.o trace_points.o firmware.o \
>  	execlist.o scheduler.o sched_policy.o mmio_context.o cmd_parser.o debugfs.o \
>  	fb_decoder.o dmabuf.o page_track.o
>  
> -ccflags-y				+= -I$(src) -I$(src)/$(GVT_DIR)
> +ccflags-y				+= -I $(srctree)/$(src) -I $(srctree)/$(src)/$(GVT_DIR)/
>  i915-y					+= $(addprefix $(GVT_DIR)/, $(GVT_SOURCE))
> diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
> index 56a70c7..b7b1ebd 100644
> --- a/drivers/gpu/drm/msm/Makefile
> +++ b/drivers/gpu/drm/msm/Makefile
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
> -ccflags-y := -Idrivers/gpu/drm/msm
> -ccflags-y += -Idrivers/gpu/drm/msm/disp/dpu1
> -ccflags-$(CONFIG_DRM_MSM_DSI) += -Idrivers/gpu/drm/msm/dsi
> +ccflags-y := -I $(srctree)/$(src)
> +ccflags-y += -I $(srctree)/$(src)/disp/dpu1
> +ccflags-$(CONFIG_DRM_MSM_DSI) += -I $(srctree)/$(src)/dsi
>  
>  msm-y := \
>  	adreno/adreno_device.o \
> diff --git a/drivers/gpu/drm/nouveau/Kbuild b/drivers/gpu/drm/nouveau/Kbuild
> index ea3035e..4fae728 100644
> --- a/drivers/gpu/drm/nouveau/Kbuild
> +++ b/drivers/gpu/drm/nouveau/Kbuild
> @@ -1,7 +1,7 @@
> -ccflags-y += -I$(src)/include
> -ccflags-y += -I$(src)/include/nvkm
> -ccflags-y += -I$(src)/nvkm
> -ccflags-y += -I$(src)
> +ccflags-y += -I $(srctree)/$(src)/include
> +ccflags-y += -I $(srctree)/$(src)/include/nvkm
> +ccflags-y += -I $(srctree)/$(src)/nvkm
> +ccflags-y += -I $(srctree)/$(src)
>  
>  # NVKM - HW resource manager
>  #- code also used by various userspace tools/tests
> -- 
> 2.7.4

-- 
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>