linux-kernel - [PATCH 0/3] ia64: clean-up header dependency and build process, fix build warning

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Date:   Sat, 29 Aug 2020 14:15:21 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>,
        linux-ia64@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>, linux-kbuild@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        afzal mohammed <afzal.mohd.ma@...il.com>,
        linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] ia64: clean-up header dependency and build process, fix build warning

Randy Dunlap reports the following warning with CONFIG_IA64_PALINFO=m:

../scripts/Makefile.build:68: 'arch/ia64/kernel/palinfo.ko' will not be built even though obj-m is specified.
../scripts/Makefile.build:69: You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.

This comes from the fact Kbuild descends into arch/ia64/kernel/ twice.

First, to generate <generated/nr-irqs.h>,
Second, to build kernel and module objects.

The warning is emitted in the first descend because it is not the
intended usage.

I looked into the code closely, and noticed arch/ia64/kernel/nr-irqs.c
was not needed in the first place.

It was separated out of arch/ia64/kernel/asm-offsets.c just because
<asm/mca.h> was including too many bogus headers.

IA64 is not actively maintained, and there exists unneeded obsolete code.

The first two patches are the outcome when I played with ARCH=ia64 builds,
but not prerequisites for 3/3. Anyway I believe they are nice cleanups
and folded in this patch set.

3/3 is the important one to fix the false positive warning,
and it is a nice cleanup too.

Masahiro Yamada (3):
  ia64: do not typedef struct pal_min_state_area_s
  ia64: remove unneeded header includes from <asm/mca.h>
  ia64: remove generated/nr-irqs.h generation to fix build warning

 arch/ia64/Makefile             |  6 ------
 arch/ia64/include/asm/irq.h    |  4 +++-
 arch/ia64/include/asm/mca.h    | 11 ++++-------
 arch/ia64/include/asm/pal.h    |  4 ++--
 arch/ia64/include/asm/sal.h    |  2 +-
 arch/ia64/kernel/Makefile      |  5 -----
 arch/ia64/kernel/asm-offsets.c | 18 +++++++++---------
 arch/ia64/kernel/efi.c         |  1 +
 arch/ia64/kernel/mca.c         |  5 +++--
 arch/ia64/kernel/mca_drv.c     |  2 +-
 arch/ia64/kernel/nr-irqs.c     | 22 ----------------------
 11 files changed, 24 insertions(+), 56 deletions(-)
 delete mode 100644 arch/ia64/kernel/nr-irqs.c

-- 
2.25.1