The following commit has been merged into the x86/percpu branch of tip: Commit-ID: 47ff30cc1be7bf426c03ecc84371452109b416e4 Gitweb: https://git.kernel.org/tip/47ff30cc1be7bf426c03ecc84371452109b416e4 Author: Uros Bizjak <ubizjak@xxxxxxxxx> AuthorDate: Mon, 20 May 2024 10:21:14 +02:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Tue, 21 May 2024 10:17:01 +02:00 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: 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> Link: https://lore.kernel.org/r/20240520082134.121320-1-ubizjak@xxxxxxxxx --- arch/x86/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9d16fee..c9e0a54 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -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
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