On Tue, 23 Mar 2021 at 13:41, Arnd Bergmann <arnd@xxxxxxxxxx> wrote: > > From: Arnd Bergmann <arnd@xxxxxxxx> > > gcc-11 adds support for -fsanitize=kernel-hwaddress, so it becomes > possible to enable CONFIG_KASAN_SW_TAGS. > > Unfortunately this fails to build at the moment, because the > corresponding command line arguments use llvm specific syntax. > > Change it to use the cc-param macro instead, which works on both > clang and gcc. > > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Reviewed-by: Marco Elver <elver@xxxxxxxxxx> Although I think you need to rebase against either -mm or -next, because there have been changes to the CONFIG_KASAN_STACK variable. > --- > scripts/Makefile.kasan | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan > index 1e000cc2e7b4..0a2789783d1b 100644 > --- a/scripts/Makefile.kasan > +++ b/scripts/Makefile.kasan > @@ -36,14 +36,14 @@ endif # CONFIG_KASAN_GENERIC > ifdef CONFIG_KASAN_SW_TAGS > > ifdef CONFIG_KASAN_INLINE > - instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) > + instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) > else > - instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 > + instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) > endif > > CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ > - -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ > - -mllvm -hwasan-use-short-granules=0 \ > + $(call cc-param,hwasan-instrument-stack=$(CONFIG_KASAN_STACK)) \ > + $(call cc-param,hwasan-use-short-granules=0) \ > $(instrumentation_flags) > > endif # CONFIG_KASAN_SW_TAGS > -- > 2.29.2 >
