linux-kernel - [PATCH 12/11] pragma once: scripted treewide conversion

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Message-ID: <YDvO2kmidKZaK26j@localhost.localdomain>
Date:   Sun, 28 Feb 2021 20:11:54 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, linux-arch@...r.kernel.org
Subject: [PATCH 12/11] pragma once: scripted treewide conversion

[  Bcc a lot of lists so that people understand what's this is all         ]
[  about without creating uber-cc-thread.                                  ]
[  Apologies if I missed your subsystem                                    ]
[  Please see [PATCH 11/11: pragma once: conversion script (in Python 2)]  ]

Hi, Linus.

Please run the script below from top-level directory, it will convert
most kernel headers to #pragma once directive advancing them into
21-st century.

The advantages are:

* less LOC

	18087 files changed, 18878 insertions(+), 99804 deletions(-)
	= -81 kLOC (give or take)

* less mental tax on developers forced to name things which aren't even
  real code

* less junk in preprocessor hashtables and editors/IDEs autocompletion
  lists

There are two bit exceptions: UAPI headers and ACPICA.
Given ubiquity of #pragma once, I personally think even these subsystems
should be converted in the future.

Compile tested on alpha, arc, arm, arm64, h8300, ia64, m68k, microblaze,
mips, nios2, parisc, powerpc, riscv, s390, sh, sparc, um-i386, um-x86_64,
i386, x86_64, xtensa (allnoconfig, all defconfigs, allmodconfig with or
without SMP/DEBUG_KERNEL + misc stuff).

Not compile tested on csky, hexagon, nds32, openrisc. 

Love,
	Alexey

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>

#!/bin/sh -x
find . -type f -name '*.h' -print	|\
LC_ALL=C sort				|\
sed -e 's#^./##g'			|\
xargs ./scripts/pragma-once.py

find . -type d -name 'uapi' | xargs git checkout -f
git checkout -f arch/alpha/include/asm/cmpxchg.h
git checkout -f arch/arm/mach-imx/hardware.h
git checkout -f arch/arm/mach-ixp4xx/include/mach/hardware.h
git checkout -f arch/arm/mach-sa1100/include/mach/hardware.h
git checkout -f arch/mips/include/asm/mips-cps.h
git checkout -f arch/x86/boot/boot.h
git checkout -f arch/x86/boot/ctype.h
git checkout -f arch/x86/include/asm/cpufeatures.h
git checkout -f arch/x86/include/asm/disabled-features.h
git checkout -f arch/x86/include/asm/required-features.h
git checkout -f arch/x86/include/asm/vmxfeatures.h
git checkout -f arch/x86/include/asm/vvar.h
git checkout -f drivers/acpi/acpica/
git checkout -f drivers/gpu/drm/amd/pm/inc/vega10_ppsmc.h
git checkout -f drivers/gpu/drm/amd/pm/powerplay/ppsmc.h
git checkout -f drivers/input/misc/yealink.h
git checkout -f drivers/media/usb/dvb-usb-v2/mxl111sf-demod.h
git checkout -f drivers/media/usb/dvb-usb-v2/mxl111sf-tuner.h
git checkout -f drivers/pcmcia/yenta_socket.h
git checkout -f drivers/staging/rtl8723bs/include/hal_com_h2c.h
git checkout -f include/linux/acpi.h
git checkout -f include/linux/bitops.h
git checkout -f include/linux/compiler_types.h
git checkout -f include/linux/device.h
git checkout -f include/linux/kbuild.h
git checkout -f include/linux/libfdt_env.h
git checkout -f include/linux/local_lock.h
git checkout -f include/linux/spinlock.h
git checkout -f include/linux/spinlock_api_smp.h
git checkout -f include/linux/spinlock_types.h
git checkout -f include/linux/tracepoint.h
git checkout -f mm/gup_test.h
git checkout -f net/batman-adv/main.h
git checkout -f scripts/dtc/
git checkout -f tools/include/linux/bitops.h
git checkout -f tools/include/linux/compiler.h
git checkout -f tools/testing/selftests/clone3/clone3_selftests.h
git checkout -f tools/testing/selftests/futex/include/atomic.h
git checkout -f tools/testing/selftests/futex/include/futextest.h
git checkout -f tools/testing/selftests/futex/include/logging.h
git checkout -f tools/testing/selftests/kselftest.h
git checkout -f tools/testing/selftests/kselftest_harness.h
git checkout -f tools/testing/selftests/pidfd/pidfd.h
git checkout -f tools/testing/selftests/x86/helpers.h