+++ /dev/null
-From 6439890c47551e612037e8f410068d2c8b105211 Mon Sep 17 00:00:00 2001
-From: Sasha Levin <sashal@kernel.org>
-Date: Tue, 8 Mar 2022 22:56:14 +0100
-Subject: Kbuild: move to -std=gnu11
-
-From: Arnd Bergmann <arnd@arndb.de>
-
-[ Upstream commit e8c07082a810fbb9db303a2b66b66b8d7e588b53 ]
-
-During a patch discussion, Linus brought up the option of changing
-the C standard version from gnu89 to gnu99, which allows using variable
-declaration inside of a for() loop. While the C99, C11 and later standards
-introduce many other features, most of these are already available in
-gnu89 as GNU extensions as well.
-
-An earlier attempt to do this when gcc-5 started defaulting to
--std=gnu11 failed because at the time that caused warnings about
-designated initializers with older compilers. Now that gcc-5.1 is
-the minimum compiler version used for building kernels, that is no
-longer a concern. Similarly, the behavior of 'inline' functions changes
-between gnu89 using gnu_inline behavior and gnu11 using standard c99+
-behavior, but this was taken care of by defining 'inline' to include
-__attribute__((gnu_inline)) in order to allow building with clang a
-while ago.
-
-Nathan Chancellor reported a new -Wdeclaration-after-statement
-warning that appears in a system header on arm, this still needs a
-workaround.
-
-The differences between gnu99, gnu11, gnu1x and gnu17 are fairly
-minimal and mainly impact warnings at the -Wpedantic level that the
-kernel never enables. Between these, gnu11 is the newest version
-that is supported by all supported compiler versions, though it is
-only the default on gcc-5, while all other supported versions of
-gcc or clang default to gnu1x/gnu17.
-
-Link: https://lore.kernel.org/lkml/CAHk-=wiyCH7xeHcmiFJ-YgXUy2Jaj7pnkdKpcovt8fYbVFW3TA@mail.gmail.com/
-Link: https://github.com/ClangBuiltLinux/linux/issues/1603
-Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
-Acked-by: Marco Elver <elver@google.com>
-Acked-by: Jani Nikula <jani.nikula@intel.com>
-Acked-by: David Sterba <dsterba@suse.com>
-Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
-Reviewed-by: Alex Shi <alexs@kernel.org>
-Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
-Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
-Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-Reviewed-by: Nathan Chancellor <nathan@kernel.org>
-Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
-Stable-dep-of: cbf54f37600e ("platform/x86: wmi: Skip blocks with zero instances")
-Signed-off-by: Sasha Levin <sashal@kernel.org>
----
- Documentation/process/programming-language.rst | 6 +++---
- .../translations/it_IT/process/programming-language.rst | 4 ++--
- .../translations/zh_CN/process/programming-language.rst | 3 +--
- .../translations/zh_TW/process/programming-language.rst | 3 +--
- Makefile | 4 ++--
- arch/arm64/kernel/vdso32/Makefile | 2 +-
- 6 files changed, 10 insertions(+), 12 deletions(-)
-
-diff --git a/Documentation/process/programming-language.rst b/Documentation/process/programming-language.rst
-index ec474a70a02fa..5fc9160ca1fa5 100644
---- a/Documentation/process/programming-language.rst
-+++ b/Documentation/process/programming-language.rst
-@@ -5,9 +5,9 @@ Programming Language
-
- The kernel is written in the C programming language [c-language]_.
- More precisely, the kernel is typically compiled with ``gcc`` [gcc]_
--under ``-std=gnu89`` [gcc-c-dialect-options]_: the GNU dialect of ISO C90
--(including some C99 features). ``clang`` [clang]_ is also supported, see
--docs on :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
-+under ``-std=gnu11`` [gcc-c-dialect-options]_: the GNU dialect of ISO C11.
-+``clang`` [clang]_ is also supported, see docs on
-+:ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
-
- This dialect contains many extensions to the language [gnu-extensions]_,
- and many of them are used within the kernel as a matter of course.
-diff --git a/Documentation/translations/it_IT/process/programming-language.rst b/Documentation/translations/it_IT/process/programming-language.rst
-index 41db2598ce119..c1a9b481a6f99 100644
---- a/Documentation/translations/it_IT/process/programming-language.rst
-+++ b/Documentation/translations/it_IT/process/programming-language.rst
-@@ -10,8 +10,8 @@ Linguaggio di programmazione
-
- Il kernel è scritto nel linguaggio di programmazione C [it-c-language]_.
- Più precisamente, il kernel viene compilato con ``gcc`` [it-gcc]_ usando
--l'opzione ``-std=gnu89`` [it-gcc-c-dialect-options]_: il dialetto GNU
--dello standard ISO C90 (con l'aggiunta di alcune funzionalità da C99).
-+l'opzione ``-std=gnu11`` [it-gcc-c-dialect-options]_: il dialetto GNU
-+dello standard ISO C11.
- Linux supporta anche ``clang`` [it-clang]_, leggete la documentazione
- :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
-
-diff --git a/Documentation/translations/zh_CN/process/programming-language.rst b/Documentation/translations/zh_CN/process/programming-language.rst
-index 2a47a1d2ec20f..fabdc338dbfbc 100644
---- a/Documentation/translations/zh_CN/process/programming-language.rst
-+++ b/Documentation/translations/zh_CN/process/programming-language.rst
-@@ -9,8 +9,7 @@
- ============
-
- 内核是用C语言 :ref:`c-language <cn_c-language>` 编写的。更准确地说，内核通常是用 :ref:`gcc <cn_gcc>`
--在 ``-std=gnu89`` :ref:`gcc-c-dialect-options <cn_gcc-c-dialect-options>` 下编译的：ISO C90的 GNU 方言（
--包括一些C99特性）
-+在 ``-std=gnu11`` :ref:`gcc-c-dialect-options <cn_gcc-c-dialect-options>` 下编译的：ISO C11的 GNU 方言
-
- 这种方言包含对语言 :ref:`gnu-extensions <cn_gnu-extensions>` 的许多扩展，当然，它们许多都在内核中使用。
-
-diff --git a/Documentation/translations/zh_TW/process/programming-language.rst b/Documentation/translations/zh_TW/process/programming-language.rst
-index 54e3699eadf85..144bdaf81a416 100644
---- a/Documentation/translations/zh_TW/process/programming-language.rst
-+++ b/Documentation/translations/zh_TW/process/programming-language.rst
-@@ -12,8 +12,7 @@
- ============
-
- 內核是用C語言 :ref:`c-language <tw_c-language>` 編寫的。更準確地說，內核通常是用 :ref:`gcc <tw_gcc>`
--在 ``-std=gnu89`` :ref:`gcc-c-dialect-options <tw_gcc-c-dialect-options>` 下編譯的：ISO C90的 GNU 方言（
--包括一些C99特性）
-+在 ``-std=gnu11`` :ref:`gcc-c-dialect-options <tw_gcc-c-dialect-options>` 下編譯的：ISO C11的 GNU 方言
-
- 這種方言包含對語言 :ref:`gnu-extensions <tw_gnu-extensions>` 的許多擴展，當然，它們許多都在內核中使用。
-
-diff --git a/Makefile b/Makefile
-index 5976e71522607..fb1517f05c3ff 100644
---- a/Makefile
-+++ b/Makefile
-@@ -524,7 +524,7 @@ KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
- -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
- -Werror=implicit-function-declaration -Werror=implicit-int \
- -Werror=return-type -Wno-format-security \
-- -std=gnu89
-+ -std=gnu11
- KBUILD_CPPFLAGS := -D__KERNEL__
- KBUILD_AFLAGS_KERNEL :=
- KBUILD_CFLAGS_KERNEL :=
-@@ -809,7 +809,7 @@ KBUILD_CFLAGS += $(KBUILD_CFLAGS-y)
-
- ifdef CONFIG_CC_IS_CLANG
- KBUILD_CPPFLAGS += -Qunused-arguments
--# The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
-+# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
- KBUILD_CFLAGS += -Wno-gnu
- # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
- # source of a reference will be _MergedGlobals and not on of the whitelisted names.
-diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
-index 50cb1ec092ae5..d7f5b140a5d2a 100644
---- a/arch/arm64/kernel/vdso32/Makefile
-+++ b/arch/arm64/kernel/vdso32/Makefile
-@@ -77,7 +77,7 @@ VDSO_CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
- -Werror-implicit-function-declaration \
- -Wno-format-security \
- -Wdeclaration-after-statement \
-- -std=gnu89
-+ -std=gnu11
- VDSO_CFLAGS += -O2
- # Some useful compiler-dependent flags from top-level Makefile
- VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,)
---
-2.42.0
-
projects / thirdparty / kernel / stable-queue.git / commitdiff
