[tip: x86/percpu] x86/percpu: Enable named address spaces for GCC 9.1+

[tip-bot2 for Uros Bizjak]

The following commit has been merged into the x86/percpu branch of tip:

Commit-ID:     b429eafe0d9f765d8626e53221ce3108b783da5e
Gitweb:        https://git.kernel.org/tip/b429eafe0d9f765d8626e53221ce3108b783da5e
Author:        Uros Bizjak <ubizjak@xxxxxxxxx>
AuthorDate:    Thu, 21 Mar 2024 17:46:41 +01:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Thu, 21 Mar 2024 20:16:20 +01:00

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@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240321164647.289879-1-ubizjak@xxxxxxxxx
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 09455d9..03c9d11 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