From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E84453431FD; Wed, 3 Dec 2025 15:57:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777467; cv=none; b=sG4MLEUEPhBTMn+0ISTOIo92epch+bDflyPATkVf+sXYcuXOFV3YG6elFIFRRTvwtJlSPWzapFam3bSkfHDRnCDeHvgr/PsdKwaG5281IpH5JmKy8J4GD+d/AwQy3v3ch0zOZWDQZcCuVf1cj3tYZ9HbNqeoWCyVMr5d4GV0NqQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777467; c=relaxed/simple; bh=MLVJiyaABtRXa0HSLH62aNSk+WwCDERQZMTpbE269Rc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aorTJ1lTaG5ry5VOIiXvLQSl3sEGHvT/R2n9Sbbcitq9MuhZYeFprXcuTOBLVYY+WcYPEZgGDfdhO1ZEsVejzgyjh6NnvCT+ait37jb6ASprrOIvKGiYKq81sNi6v3fE5WjZVGmDWgKZ/UY1njF44yTg7Gd8hPBkcwOls21BRj4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YbAefqgX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="YbAefqgX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1EF47C4CEF5; Wed, 3 Dec 2025 15:57:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764777466; bh=MLVJiyaABtRXa0HSLH62aNSk+WwCDERQZMTpbE269Rc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YbAefqgXPLwxv2IvKfSpSzbYmd9/Vp/fEWPr29NUoLNT0hkgWiLwZUPwyU2QL0Kkc VDK/JlmANseedjO47lAQSFHuH72vemBtYaxlAG582fTVoowqVZbr0N3MhwIfDcmshj 7vEQOYSqbXd/ZjZpnBWDDF641NqjK043WFqJ5v0Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alexey Dobriyan , Ingo Molnar , "H. Peter Anvin (Intel)" , "Matthieu Baerts (NGI0)" , Nathan Chancellor , Dave Hansen , Ard Biesheuvel Subject: [PATCH 5.15 046/392] x86/boot: Compile boot code with -std=gnu11 too Date: Wed, 3 Dec 2025 16:23:16 +0100 Message-ID: <20251203152415.803979516@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152414.082328008@linuxfoundation.org> References: <20251203152414.082328008@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexey Dobriyan commit b3bee1e7c3f2b1b77182302c7b2131c804175870 upstream. Use -std=gnu11 for consistency with main kernel code. It doesn't seem to change anything in vmlinux. Signed-off-by: Alexey Dobriyan Signed-off-by: Ingo Molnar Acked-by: H. Peter Anvin (Intel) Link: https://lore.kernel.org/r/2058761e-12a4-4b2f-9690-3c3c1c9902a5@p183 [ This kernel version doesn't build with GCC 15: In file included from include/uapi/linux/posix_types.h:5, from include/uapi/linux/types.h:14, from include/linux/types.h:6, from arch/x86/realmode/rm/wakeup.h:11, from arch/x86/realmode/rm/wakemain.c:2: include/linux/stddef.h:11:9: error: cannot use keyword 'false' as enumeration constant 11 | false = 0, | ^~~~~ include/linux/stddef.h:11:9: note: 'false' is a keyword with '-std=c23' onwards include/linux/types.h:30:33: error: 'bool' cannot be defined via 'typedef' 30 | typedef _Bool bool; | ^~~~ include/linux/types.h:30:33: note: 'bool' is a keyword with '-std=c23' onwards include/linux/types.h:30:1: warning: useless type name in empty declaration 30 | typedef _Bool bool; | ^~~~~~~ The fix is similar to commit ee2ab467bddf ("x86/boot: Use '-std=gnu11' to fix build with GCC 15") which has been backported to this kernel. Note: In < 5.18 version, -std=gnu89 is used instead of -std=gnu11, see commit e8c07082a810 ("Kbuild: move to -std=gnu11"). I suggest not to modify that in this commit here as all the other similar fixes to support GCC 15 set -std=gnu11. This can be done in a dedicated commit if needed. ] Signed-off-by: Matthieu Baerts (NGI0) Cc: Nathan Chancellor Cc: Dave Hansen Cc: Ard Biesheuvel Signed-off-by: Greg Kroah-Hartman --- arch/x86/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -24,7 +24,7 @@ endif # How to compile the 16-bit code. Note we always compile for -march=i386; # that way we can complain to the user if the CPU is insufficient. -REALMODE_CFLAGS := -m16 -g -Os -DDISABLE_BRANCH_PROFILING -D__DISABLE_EXPORTS \ +REALMODE_CFLAGS := -std=gnu11 -m16 -g -Os -DDISABLE_BRANCH_PROFILING -D__DISABLE_EXPORTS \ -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ -mno-mmx -mno-sse $(call cc-option,-fcf-protection=none)