From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
Eli Friedman <efriedma@codeaurora.org>,
Christopher Li <sparse@chrisli.org>,
Kees Cook <keescook@chromium.org>, Ingo Molnar <mingo@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Joe Perches <joe@perches.com>,
Dominique Martinet <asmadeus@codewreck.org>,
Nick Desaulniers <ndesaulniers@google.com>,
linux-sparse@vger.kernel.org
Subject: [PATCH 05/12] Compiler Attributes: naked was fixed in gcc 4.6
Date: Mon, 3 Sep 2018 22:33:09 +0200 [thread overview]
Message-ID: <20180903203316.16183-6-miguel.ojeda.sandonis@gmail.com> (raw)
In-Reply-To: <20180903203316.16183-1-miguel.ojeda.sandonis@gmail.com>
Commit 9c695203a7dd ("compiler-gcc.h: gcc-4.5 needs noclone
and noinline on __naked functions") added noinline and noclone
as a workaround for a gcc 4.5 bug, which was resolved in 4.6.0.
Since now the minimum gcc supported version is 4.6,
we can clean it up.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44290
and https://godbolt.org/z/h6NMIL
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Eli Friedman <efriedma@codeaurora.org>
Cc: Christopher Li <sparse@chrisli.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Joe Perches <joe@perches.com>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-sparse@vger.kernel.org
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
include/linux/compiler-gcc.h | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 76f4907ef707..4cd5e9264bce 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -77,14 +77,8 @@
* to trace naked functions because then mcount is called without
* stack and frame pointer being set up and there is no chance to
* restore the lr register to the value before mcount was called.
- *
- * The asm() bodies of naked functions often depend on standard calling
- * conventions, therefore they must be noinline and noclone.
- *
- * GCC 4.[56] currently fail to enforce this, so we must do so ourselves.
- * See GCC PR44290.
*/
-#define __naked __attribute__((__naked__)) noinline __noclone notrace
+#define __naked __attribute__((__naked__)) notrace
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
--
2.17.1
next prev parent reply other threads:[~2018-09-03 20:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-03 20:33 [PATCH v3 00/12] Compiler Attributes Miguel Ojeda
2018-09-03 20:33 ` [PATCH 01/12] Compiler Attributes: remove unused attributes Miguel Ojeda
2018-09-03 20:33 ` [PATCH 02/12] Compiler Attributes: always use the extra-underscores syntax Miguel Ojeda
2018-09-03 20:33 ` [PATCH 03/12] Compiler Attributes: remove unneeded tests Miguel Ojeda
2018-09-03 20:33 ` [PATCH 04/12] Compiler Attributes: homogenize __must_be_array Miguel Ojeda
2018-09-03 20:33 ` Miguel Ojeda [this message]
2018-09-03 20:33 ` [PATCH 06/12] Compiler Attributes: naked can be shared Miguel Ojeda
2018-09-03 20:33 ` [PATCH 07/12] Compiler Attributes: remove unneeded sparse (__CHECKER__) tests Miguel Ojeda
2018-09-05 18:20 ` Luc Van Oostenryck
2018-09-05 19:30 ` Josh Triplett
2018-09-05 19:40 ` Linus Torvalds
2018-09-05 19:49 ` Luc Van Oostenryck
2018-09-03 20:33 ` [PATCH 08/12] Compiler Attributes: add missing SPDX ID in compiler_types.h Miguel Ojeda
2018-09-03 20:33 ` [PATCH 09/12] Compiler Attributes: use feature checks instead of version checks Miguel Ojeda
2018-09-03 20:33 ` [PATCH 10/12] Compiler Attributes: KENTRY used twice the "used" attribute Miguel Ojeda
2018-09-04 16:58 ` Nick Desaulniers
2018-09-03 20:33 ` [PATCH 11/12] Compiler Attributes: remove uses of __attribute__ from compiler.h Miguel Ojeda
2018-09-03 20:33 ` [PATCH 12/12] Compiler Attributes: add Doc/process/programming-language.rst Miguel Ojeda
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