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[62.83.35.8]) by smtp.gmail.com with ESMTPSA id g2-v6sm2934768wme.20.2018.09.18.09.56.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Sep 2018 09:56:52 -0700 (PDT) From: Miguel Ojeda To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, Miguel Ojeda , Rasmus Villemoes , Eli Friedman , Christopher Li , Kees Cook , Ingo Molnar , Geert Uytterhoeven , Arnd Bergmann , Masahiro Yamada , Joe Perches , Dominique Martinet , Linus Torvalds , linux-sparse@vger.kernel.org Subject: [PATCH v2 1/2] Compiler Attributes: naked was fixed in gcc 4.6 Date: Tue, 18 Sep 2018 18:55:41 +0200 Message-Id: <20180918165542.4691-2-miguel.ojeda.sandonis@gmail.com> In-Reply-To: <20180918165542.4691-1-miguel.ojeda.sandonis@gmail.com> References: <20180918165542.4691-1-miguel.ojeda.sandonis@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Eli Friedman Cc: Christopher Li Cc: Kees Cook Cc: Ingo Molnar Cc: Geert Uytterhoeven Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Cc: Masahiro Yamada Cc: Joe Perches Cc: Dominique Martinet Cc: Linus Torvalds Cc: linux-sparse@vger.kernel.org Tested-by: Stefan Agner Reviewed-by: Stefan Agner Reviewed-by: Luc Van Oostenryck Reviewed-by: Nick Desaulniers Signed-off-by: Miguel Ojeda --- 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 763bbad1e258..25d3dd6b2702 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -84,14 +84,8 @@ * 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