From: Adrian Ratiu <adrian.ratiu@collabora.com> To: linux-arm-kernel@lists.infradead.org Cc: Nathan Chancellor <natechancellor@gmail.com>, Nick Desaulniers <ndesaulniers@google.com>, Arnd Bergmann <arnd@arndb.de>, Russell King <linux@armlinux.org.uk>, Ard Biesheuvel <ardb@kernel.org>, Arvind Sankar <nivedita@alum.mit.edu>, kernel@collabora.com, clang-built-linux <clang-built-linux@googlegroups.com>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org> Subject: [PATCH v2 1/2] arm: lib: xor-neon: remove unnecessary GCC < 4.6 warning Date: Thu, 12 Nov 2020 23:24:56 +0200 [thread overview] Message-ID: <20201112212457.2042105-2-adrian.ratiu@collabora.com> (raw) In-Reply-To: <20201112212457.2042105-1-adrian.ratiu@collabora.com> From: Nathan Chancellor <natechancellor@gmail.com> Drop warning because kernel now requires GCC >= v4.9 after commit 6ec4476ac825 ("Raise gcc version requirement to 4.9"). Reported-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com> --- arch/arm/lib/xor-neon.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/arch/arm/lib/xor-neon.c b/arch/arm/lib/xor-neon.c index b99dd8e1c93f..e1e76186ec23 100644 --- a/arch/arm/lib/xor-neon.c +++ b/arch/arm/lib/xor-neon.c @@ -19,15 +19,8 @@ MODULE_LICENSE("GPL"); * -ftree-vectorize) to attempt to exploit implicit parallelism and emit * NEON instructions. */ -#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) +#ifdef CONFIG_CC_IS_GCC #pragma GCC optimize "tree-vectorize" -#else -/* - * While older versions of GCC do not generate incorrect code, they fail to - * recognize the parallel nature of these functions, and emit plain ARM code, - * which is known to be slower than the optimized ARM code in asm-arm/xor.h. - */ -#warning This code requires at least version 4.6 of GCC #endif #pragma GCC diagnostic ignored "-Wunused-variable" -- 2.29.2
WARNING: multiple messages have this Message-ID (diff)
From: Adrian Ratiu <adrian.ratiu@collabora.com> To: linux-arm-kernel@lists.infradead.org Cc: Arnd Bergmann <arnd@arndb.de>, Nick Desaulniers <ndesaulniers@google.com>, Russell King <linux@armlinux.org.uk>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, clang-built-linux <clang-built-linux@googlegroups.com>, Arvind Sankar <nivedita@alum.mit.edu>, Nathan Chancellor <natechancellor@gmail.com>, kernel@collabora.com, Ard Biesheuvel <ardb@kernel.org> Subject: [PATCH v2 1/2] arm: lib: xor-neon: remove unnecessary GCC < 4.6 warning Date: Thu, 12 Nov 2020 23:24:56 +0200 [thread overview] Message-ID: <20201112212457.2042105-2-adrian.ratiu@collabora.com> (raw) In-Reply-To: <20201112212457.2042105-1-adrian.ratiu@collabora.com> From: Nathan Chancellor <natechancellor@gmail.com> Drop warning because kernel now requires GCC >= v4.9 after commit 6ec4476ac825 ("Raise gcc version requirement to 4.9"). Reported-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com> --- arch/arm/lib/xor-neon.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/arch/arm/lib/xor-neon.c b/arch/arm/lib/xor-neon.c index b99dd8e1c93f..e1e76186ec23 100644 --- a/arch/arm/lib/xor-neon.c +++ b/arch/arm/lib/xor-neon.c @@ -19,15 +19,8 @@ MODULE_LICENSE("GPL"); * -ftree-vectorize) to attempt to exploit implicit parallelism and emit * NEON instructions. */ -#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) +#ifdef CONFIG_CC_IS_GCC #pragma GCC optimize "tree-vectorize" -#else -/* - * While older versions of GCC do not generate incorrect code, they fail to - * recognize the parallel nature of these functions, and emit plain ARM code, - * which is known to be slower than the optimized ARM code in asm-arm/xor.h. - */ -#warning This code requires at least version 4.6 of GCC #endif #pragma GCC diagnostic ignored "-Wunused-variable" -- 2.29.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-11-12 21:23 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-12 21:24 [PATCH v2 0/2] xor-neon: Remove GCC warn & pragmas Adrian Ratiu 2020-11-12 21:24 ` Adrian Ratiu 2020-11-12 21:24 ` Adrian Ratiu [this message] 2020-11-12 21:24 ` [PATCH v2 1/2] arm: lib: xor-neon: remove unnecessary GCC < 4.6 warning Adrian Ratiu 2020-11-12 21:38 ` Nick Desaulniers 2020-11-12 21:38 ` Nick Desaulniers 2020-11-13 7:49 ` Ard Biesheuvel 2020-11-13 7:49 ` Ard Biesheuvel 2020-11-13 11:07 ` Adrian Ratiu 2020-11-13 11:07 ` Adrian Ratiu 2020-11-13 11:41 ` Ard Biesheuvel 2020-11-13 11:41 ` Ard Biesheuvel 2020-11-13 11:59 ` Adrian Ratiu 2020-11-13 11:59 ` Adrian Ratiu 2020-11-12 21:24 ` [PATCH v2 2/2] arm: lib: xor-neon: move pragma options to makefile Adrian Ratiu 2020-11-12 21:24 ` Adrian Ratiu 2020-11-12 21:40 ` Nick Desaulniers 2020-11-12 21:40 ` Nick Desaulniers 2020-11-12 21:50 ` Nathan Chancellor 2020-11-12 21:50 ` Nathan Chancellor 2020-11-13 7:50 ` Ard Biesheuvel 2020-11-13 7:50 ` Ard Biesheuvel 2020-11-13 11:17 ` Adrian Ratiu 2020-11-13 11:17 ` Adrian Ratiu
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20201112212457.2042105-2-adrian.ratiu@collabora.com \ --to=adrian.ratiu@collabora.com \ --cc=ardb@kernel.org \ --cc=arnd@arndb.de \ --cc=clang-built-linux@googlegroups.com \ --cc=kernel@collabora.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux@armlinux.org.uk \ --cc=natechancellor@gmail.com \ --cc=ndesaulniers@google.com \ --cc=nivedita@alum.mit.edu \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.