Commit 47ff30cc authored by Uros Bizjak's avatar Uros Bizjak Committed by Ingo Molnar
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x86/percpu: Enable named address spaces for all capable GCC versions 



Enable named address spaces also for GCC 6, GCC 7 and GCC 8
releases. These compilers all produce kernel images that boot
without problems.

Use compile-time test to detect compiler support for named
address spaces. The test passes with GCC 6 as the earliest
compiler version where the support for named address spaces
was introduced.

Signed-off-by: default avatarUros Bizjak <ubizjak@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240520082134.121320-1-ubizjak@gmail.com
parent 9130ea06

arch/x86/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -2430,7 +2430,8 @@ source "kernel/livepatch/Kconfig" 
endmenu



config CC_HAS_NAMED_AS

	def_bool CC_IS_GCC && GCC_VERSION >= 90100

	def_bool $(success,echo 'int __seg_fs fs; int __seg_gs gs;' | $(CC) -x c - -S -o /dev/null)

	depends on CC_IS_GCC



config CC_HAS_NAMED_AS_FIXED_SANITIZERS

	def_bool CC_IS_GCC && GCC_VERSION >= 130300