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Message-Id: <20180920172301.21868-1-miguel.ojeda.sandonis@gmail.com> Date: Thu, 20 Sep 2018 19:22:46 +0200 From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: linux-kernel@...r.kernel.org, Miguel Ojeda <miguel.ojeda.sandonis@...il.com>, Andreas Dilger <adilger.kernel@...ger.ca>, Masahiro Yamada <yamada.masahiro@...ionext.com>, Michal Marek <michal.lkml@...kovi.net>, Steven Rostedt <rostedt@...dmis.org>, Mauro Carvalho Chehab <mchehab+samsung@...nel.org>, Olof Johansson <olof@...m.net>, Konstantin Ryabitsev <konstantin@...uxfoundation.org>, "David S . Miller" <davem@...emloft.net>, Andrey Ryabinin <aryabinin@...tuozzo.com>, Kees Cook <keescook@...omium.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>, Paul Lawrence <paullawrence@...gle.com>, Sandipan Das <sandipan@...ux.vnet.ibm.com>, Andrey Konovalov <andreyknvl@...gle.com>, David Woodhouse <dwmw2@...radead.org>, Will Deacon <will.deacon@....com>, Philippe Ombredanne <pombredanne@...b.com>, Paul Burton <paul.burton@...s.com>, David Rientjes <rientjes@...gle.com>, Willy Tarreau <w@....eu>, Martin Sebor <msebor@...il.com>, Christopher Li <sparse@...isli.org>, Jonathan Corbet <corbet@....net>, Theodore Ts'o <tytso@....edu>, Geert Uytterhoeven <geert@...ux-m68k.org>, Rasmus Villemoes <linux@...musvillemoes.dk>, Joe Perches <joe@...ches.com>, Arnd Bergmann <arnd@...db.de>, Dominique Martinet <asmadeus@...ewreck.org>, Stefan Agner <stefan@...er.ch>, Luc Van Oostenryck <luc.vanoostenryck@...il.com>, Nick Desaulniers <ndesaulniers@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-doc@...r.kernel.org, linux-ext4@...r.kernel.org, linux-sparse@...r.kernel.org, linux-kbuild@...r.kernel.org Subject: [PATCH v5 00/15] Compiler Attributes The Compiler Attributes series is an effort to disentangle the include/linux/compiler*.h headers and bring them up to date. The main idea behind the series is to use feature checking macros (i.e. __has_attribute) instead of compiler version checks (e.g. GCC_VERSION), which are compiler-agnostic (so they can be shared, reducing the size of compiler-specific headers) and version-agnostic. Other related improvements have been performed in the headers as well, which on top of the use of __has_attribute it has amounted to a significant simplification of these headers (e.g. GCC_VERSION is now only guarding 4 non-attribute macros). This series should also help the efforts to support compiling the kernel with clang and icc. A fair amount of documentation and comments have also been added, clarified or removed; and the headers are now more readable, which should help kernel developers in general. The series was triggered due to the move to gcc >= 4.6. In turn, this series has also triggered Sparse to gain the ability to recognize __has_attribute on its own. Finally, the nonstring variable attribute series has been applied on top of this one. You can also fetch it from: https://github.com/ojeda/linux/tree/compiler-attributes-v5 Enjoy! Cheers, Miguel Cc: Andreas Dilger <adilger.kernel@...ger.ca> Cc: Masahiro Yamada <yamada.masahiro@...ionext.com> Cc: Michal Marek <michal.lkml@...kovi.net> Cc: Steven Rostedt <rostedt@...dmis.org> Cc: Mauro Carvalho Chehab <mchehab+samsung@...nel.org> Cc: Olof Johansson <olof@...m.net> Cc: Konstantin Ryabitsev <konstantin@...uxfoundation.org> Cc: David S. Miller <davem@...emloft.net> Cc: Andrey Ryabinin <aryabinin@...tuozzo.com> Cc: Kees Cook <keescook@...omium.org> Cc: Thomas Gleixner <tglx@...utronix.de> Cc: Ingo Molnar <mingo@...nel.org> Cc: Paul Lawrence <paullawrence@...gle.com> Cc: Sandipan Das <sandipan@...ux.vnet.ibm.com> Cc: Andrey Konovalov <andreyknvl@...gle.com> Cc: David Woodhouse <dwmw2@...radead.org> Cc: Will Deacon <will.deacon@....com> Cc: Philippe Ombredanne <pombredanne@...b.com> Cc: Paul Burton <paul.burton@...s.com> Cc: David Rientjes <rientjes@...gle.com> Cc: Willy Tarreau <w@....eu> Cc: Martin Sebor <msebor@...il.com> Cc: Christopher Li <sparse@...isli.org> Cc: Jonathan Corbet <corbet@....net> Cc: Theodore Ts'o <tytso@....edu> Cc: Geert Uytterhoeven <geert@...ux-m68k.org> Cc: Rasmus Villemoes <linux@...musvillemoes.dk> Cc: Joe Perches <joe@...ches.com> Cc: Arnd Bergmann <arnd@...db.de> Cc: Dominique Martinet <asmadeus@...ewreck.org> Cc: Stefan Agner <stefan@...er.ch> Cc: Luc Van Oostenryck <luc.vanoostenryck@...il.com> Cc: Nick Desaulniers <ndesaulniers@...gle.com> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: Linus Torvalds <torvalds@...ux-foundation.org> Cc: linux-doc@...r.kernel.org Cc: linux-ext4@...r.kernel.org Cc: linux-sparse@...r.kernel.org Cc: linux-kbuild@...r.kernel.org v4 -> v5 * Removed the 2 __naked patches, since Greg just applied them to master; and rebased on top of that. The only change in the range-diff is in "Compiler Attributes: always use the extra-underscores syntax" due to the move of __naked to compiler_types.h. * Applied the nonstring series on top of this one (last 4 patches). Rationale: - the nonstring series would anyway be modified again by this one (so it has been rebased after the general cleanup). - ext4's "local" nonstring was merged - easier to manage (and easier to see the end result) The first 2 patches of the last 4 add the warning back at W=1 and add the __nonstring attribute. The other two serve as an example of usage and as a cleanup. * Cc lists removed from each commit; using a single list in the cover letter; and a new, revised list of Cc (wider audience). Miguel Ojeda (15): Compiler Attributes: remove unused attributes Compiler Attributes: always use the extra-underscores syntax Compiler Attributes: remove unneeded tests Compiler Attributes: homogenize __must_be_array Compiler Attributes: remove unneeded sparse (__CHECKER__) tests Compiler Attributes: add missing SPDX ID in compiler_types.h Compiler Attributes: use feature checks instead of version checks Compiler Attributes: KENTRY used twice the "used" attribute Compiler Attributes: remove uses of __attribute__ from compiler.h Compiler Attributes: add Doc/process/programming-language.rst Compiler Attributes: add MAINTAINERS entry Compiler Attributes: add support for __nonstring (gcc >= 8) Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8) Compiler Attributes: auxdisplay: panel: use __nonstring Compiler Attributes: ext4: remove local __nonstring definition Documentation/process/index.rst | 1 + .../process/programming-language.rst | 45 +++ MAINTAINERS | 5 + drivers/auxdisplay/panel.c | 7 +- fs/ext4/ext4.h | 9 - include/linux/compiler-clang.h | 5 - include/linux/compiler-gcc.h | 70 +---- include/linux/compiler-intel.h | 9 - include/linux/compiler.h | 19 +- include/linux/compiler_attributes.h | 258 ++++++++++++++++++ include/linux/compiler_types.h | 101 +------ scripts/Makefile.extrawarn | 1 + 12 files changed, 341 insertions(+), 189 deletions(-) create mode 100644 Documentation/process/programming-language.rst create mode 100644 include/linux/compiler_attributes.h -- 2.17.1
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