x86/percpu: Disable named address spaces for KCSAN

-fsanitize=thread (KCSAN) is at the moment incompatible
with named address spaces in a similar way as KASAN -
see GCC PR sanitizer/111736:

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111736

The patch disables named address spaces with KCSAN.

Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240325110128.615933-1-ubizjak@gmail.com

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 39886bab943a88b3a8262a733a7e2e82269934f8..4fff6ed46e902cfbe723cf5ed5ce517e2d131891 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2439,6 +2439,8 @@ config USE_X86_SEG_SUPPORT
        # with named address spaces - see GCC PR sanitizer/111736.
        #
        depends on !KASAN
+       # -fsanitize=thread (KCSAN) is also incompatible.
+       depends on !KCSAN
 
 config CC_HAS_SLS
        def_bool $(cc-option,-mharden-sls=all)