linux-kernel - Re: [PATCH 2/4] Makefile: remove some unnecessary header include paths

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Date: Sat, 20 Apr 2024 16:46:49 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Nicolas Schier <nicolas@...sle.eu>
Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] Makefile: remove some unnecessary header include paths

On Sat, Apr 20, 2024 at 12:07 AM Nicolas Schier <nicolas@...sle.eu> wrote:
>
> On Tue 16 Apr 2024 21:18:36 GMT, Masahiro Yamada wrote:
> > The include directive with the double-quote form, #include "...",
> > first searches for the specified header in the directory containing
> > the source file.
> >
> > If all local headers are included using the double-quote form instead
> > of the angle bracket form, there is no need to add the local directory
> > to the header search path.
> >
> > drivers/gpu/drm/imagination and drivers/net/ethernet/aquantia/atlantic
> > use only the double-quote form for including the local headers, and
> > there are no generated sources or headers in their directories. Hence,
> > the local header search path is unneeded.
> >
> > The same applies to arch/loongarch/kvm/ because TRACE_INCLUDE_PATH is
> > relative to include/trace/.
> >
> > I guess there exist more Makefiles with unnecessary header inclusion
> > paths (and more cases where it is possible to delete the header search
> > path by replacing #include <...> with #include "..."), but I do not have
> > an easy way to detect it.
> >
> > These are unneeded inclusion paths that I happened to find.
> >
> > Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> > ---
> >
> >  arch/loongarch/kvm/Makefile                     | 2 --
> >  drivers/gpu/drm/imagination/Makefile            | 2 --
> >  drivers/net/ethernet/aquantia/atlantic/Makefile | 2 --
> >  3 files changed, 6 deletions(-)
> >
> > diff --git a/arch/loongarch/kvm/Makefile b/arch/loongarch/kvm/Makefile
> > index 244467d7792a..7a0108a721c1 100644
> > --- a/arch/loongarch/kvm/Makefile
> > +++ b/arch/loongarch/kvm/Makefile
> > @@ -3,8 +3,6 @@
> >  # Makefile for LoongArch KVM support
> >  #
> >
> > -ccflags-y += -I $(srctree)/$(src)
> > -
> >  include $(srctree)/virt/kvm/Makefile.kvm
> >
> >  obj-$(CONFIG_KVM) += kvm.o
> > diff --git a/drivers/gpu/drm/imagination/Makefile b/drivers/gpu/drm/imagination/Makefile
> > index ec6db8e9b403..3d9d4d40fb80 100644
> > --- a/drivers/gpu/drm/imagination/Makefile
> > +++ b/drivers/gpu/drm/imagination/Makefile
> > @@ -1,8 +1,6 @@
> >  # SPDX-License-Identifier: GPL-2.0-only OR MIT
> >  # Copyright (c) 2023 Imagination Technologies Ltd.
> >
> > -subdir-ccflags-y := -I$(srctree)/$(src)
> > -
> >  powervr-y := \
> >       pvr_ccb.o \
> >       pvr_cccb.o \
> > diff --git a/drivers/net/ethernet/aquantia/atlantic/Makefile b/drivers/net/ethernet/aquantia/atlantic/Makefile
> > index 8ebcc68e807f..268a055086c4 100644
> > --- a/drivers/net/ethernet/aquantia/atlantic/Makefile
> > +++ b/drivers/net/ethernet/aquantia/atlantic/Makefile
> > @@ -8,8 +8,6 @@
> >
> >  obj-$(CONFIG_AQTION) += atlantic.o
> >
> > -ccflags-y += -I$(srctree)/$(src)
> > -
> >  atlantic-objs := aq_main.o \
> >       aq_nic.o \
> >       aq_pci_func.o \
>
> I'm afraid drivers/net/ethernet/aquantia/atlantic/macsec/macsec_api.c,
> .../hw_atl2/hw_atl2.c and .../hw_atl2/hw_atl2_utills{,_fw}.[ch] need to
> be adjusted first.
>
> Except for the atlantic related patch diff:
> Reviewed-by: Nicolas Schier <nicolas@...sle.eu>



Right. I got build errors for atlantic.

I will drop this because it may cause regressions.






-- 
Best Regards
Masahiro Yamada