x86/percpu: Re-enable named address spaces with sanitizers for GCC 13.3+

Commit:

  b6540de9b5c8 ("x86/percpu: Disable named address spaces for KASAN")

... disabled support for named address spaces with KCSAN due to
the incompatibility issue between named AS and KCSAN.

GCC 13.3 has fixed this issue (GCC PR sanitizer/111736) so the
support for named address spaces can be re-enabled with sanitizers
for GCC compiler version >= 13.3.

[ Note that the patch considers GCC 14 to be fixed - if somebody is
  using snapshots of the GCC 14 before the fix, they should upgrade. ]

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/20240402121926.78477-1-ubizjak@gmail.com

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f1c020d2161757e8edf9306248c1b9d68ec360e0..9332badb48ea0dc13166f35eda41fe55c15ced72 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2431,19 +2431,18 @@ endmenu
 config CC_HAS_NAMED_AS
        def_bool CC_IS_GCC && GCC_VERSION >= 90100
 
-config CC_HAS_NAMED_AS_FIXED_ASAN
+config CC_HAS_NAMED_AS_FIXED_SANITIZERS
        def_bool CC_IS_GCC && GCC_VERSION >= 130300
 
 config USE_X86_SEG_SUPPORT
        def_bool y
        depends on CC_HAS_NAMED_AS
        #
-       # -fsanitize=kernel-address (KASAN) is incompatible with named
-       # address spaces with GCC < 13.3 - see GCC PR sanitizer/111736.
+       # -fsanitize=kernel-address (KASAN) and -fsanitize=thread
+       # (KCSAN) are incompatible with named address spaces with
+       # GCC < 13.3 - see GCC PR sanitizer/111736.
        #
-       depends on !KASAN || CC_HAS_NAMED_AS_FIXED_ASAN
-       # -fsanitize=thread (KCSAN) is also incompatible.
-       depends on !KCSAN
+       depends on !(KASAN || KCSAN) || CC_HAS_NAMED_AS_FIXED_SANITIZERS
 
 config CC_HAS_SLS
        def_bool $(cc-option,-mharden-sls=all)