linux-kernel - [PATCH -tip] x86/percpu: Enable named address spaces for GCC 9.1+

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Message-ID: <20240321164647.289879-1-ubizjak@gmail.com>
Date: Thu, 21 Mar 2024 17:46:41 +0100
From: Uros Bizjak <ubizjak@...il.com>
To: x86@...nel.org,
	linux-kernel@...r.kernel.org
Cc: Uros Bizjak <ubizjak@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andy Lutomirski <luto@...nel.org>,
	Brian Gerst <brgerst@...il.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Josh Poimboeuf <jpoimboe@...hat.com>
Subject: [PATCH -tip] x86/percpu: Enable named address spaces for GCC 9.1+

Enable named address spaces also for GCC 9, GCC 10 and GCC 11
releases. These compilers all produce kernel images that boot
without problems.

GCC_VERSION cutoff is arbitrary. It is primary a risk-reduction
cutoff, older compilers will be tested and enabled in linux 6.10
release.

Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 09455d93b947..03c9d1100f09 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2433,7 +2433,7 @@ source "kernel/livepatch/Kconfig"
 endmenu
 
 config CC_HAS_NAMED_AS
-	def_bool CC_IS_GCC && GCC_VERSION >= 120100
+	def_bool CC_IS_GCC && GCC_VERSION >= 90100
 
 config CC_HAS_NAMED_AS_FIXED_ASAN
 	def_bool CC_IS_GCC && GCC_VERSION >= 130300
-- 
2.42.0