linux-kernel - [RESEND PATCH 0/6] x86: switch to generic syscall{tbl,hdr}.sh with various syscall code cleanups

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Message-Id: <20210517073815.97426-1-masahiroy@kernel.org>
Date:   Mon, 17 May 2021 16:38:08 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        "H. Peter Anvin" <hpa@...or.com>, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        linux-kernel@...r.kernel.org, linux-um@...ts.infradead.org
Subject: [RESEND PATCH 0/6] x86: switch to generic syscall{tbl,hdr}.sh with various syscall code cleanups


Previously, many architectures duplicated similar scripts to
generate syscall headers.

For v5.11:

  $ find  arch  -name syscalltbl.sh
  arch/parisc/kernel/syscalls/syscalltbl.sh
  arch/alpha/kernel/syscalls/syscalltbl.sh
  arch/microblaze/kernel/syscalls/syscalltbl.sh
  arch/powerpc/kernel/syscalls/syscalltbl.sh
  arch/arm/tools/syscalltbl.sh
  arch/sparc/kernel/syscalls/syscalltbl.sh
  arch/sh/kernel/syscalls/syscalltbl.sh
  arch/xtensa/kernel/syscalls/syscalltbl.sh
  arch/ia64/kernel/syscalls/syscalltbl.sh
  arch/x86/entry/syscalls/syscalltbl.sh
  arch/mips/kernel/syscalls/syscalltbl.sh
  arch/m68k/kernel/syscalls/syscalltbl.sh
  $ find  arch  -name  syscallhdr.sh
  arch/parisc/kernel/syscalls/syscallhdr.sh
  arch/alpha/kernel/syscalls/syscallhdr.sh
  arch/microblaze/kernel/syscalls/syscallhdr.sh
  arch/powerpc/kernel/syscalls/syscallhdr.sh
  arch/arm/tools/syscallhdr.sh
  arch/sparc/kernel/syscalls/syscallhdr.sh
  arch/sh/kernel/syscalls/syscallhdr.sh
  arch/xtensa/kernel/syscalls/syscallhdr.sh
  arch/ia64/kernel/syscalls/syscallhdr.sh
  arch/x86/entry/syscalls/syscallhdr.sh
  arch/mips/kernel/syscalls/syscallhdr.sh
  arch/m68k/kernel/syscalls/syscallhdr.sh

They were mostly consolidated by the time of v5.13-rc1:

Now:

  $ find  arch  -name syscalltbl.sh
  arch/x86/entry/syscalls/syscalltbl.sh
  $ find  arch  -name  syscallhdr.sh
  arch/x86/entry/syscalls/syscallhdr.sh

x86 is a remaining bit because x86 maintainers did not respond.

This patch series makes a lot of cleanups.
We can remove a lot of lines.
The code diff is attractive.

No code change since the previous submission.
(Only 1/7 was applied, so dropped from the series)

https://lore.kernel.org/lkml/20210301131533.64671-1-masahiroy@kernel.org/



Masahiro Yamada (6):
  x86/entry/x32: rename __x32_compat_sys_* to __x64_compat_sys_*
  x86/syscalls: switch to generic syscalltbl.sh
  x86/syscalls: stop filling syscall arrays with *_sys_ni_syscall
  x86/unistd: define X32_NR_syscalls only for 64-bit kernel
  x86/syscalls: use __NR_syscalls instead of __NR_syscall_max
  x86/syscalls: switch to generic syscallhdr.sh

 arch/um/kernel/skas/syscall.c          |  2 +-
 arch/x86/entry/syscall_32.c            | 20 +++++------
 arch/x86/entry/syscall_64.c            | 17 +++-------
 arch/x86/entry/syscall_x32.c           | 35 ++++----------------
 arch/x86/entry/syscalls/Makefile       | 36 +++++++++++---------
 arch/x86/entry/syscalls/syscallhdr.sh  | 35 --------------------
 arch/x86/entry/syscalls/syscalltbl.sh  | 46 --------------------------
 arch/x86/include/asm/Kbuild            |  1 +
 arch/x86/include/asm/syscall_wrapper.h | 10 +++---
 arch/x86/include/asm/unistd.h          |  8 ++---
 arch/x86/um/sys_call_table_32.c        | 14 +++-----
 arch/x86/um/sys_call_table_64.c        | 15 ++-------
 12 files changed, 60 insertions(+), 179 deletions(-)
 delete mode 100644 arch/x86/entry/syscalls/syscallhdr.sh
 delete mode 100644 arch/x86/entry/syscalls/syscalltbl.sh

-- 
2.27.0