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    SubjectRe: [PATCH v13 05/25] kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS
    On Thu, Dec 06, 2018 at 01:24:23PM +0100, Andrey Konovalov wrote:
    > diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
    > index 3e7dafb3ea80..39f668d5066b 100644
    > --- a/include/linux/compiler-clang.h
    > +++ b/include/linux/compiler-clang.h
    > @@ -16,9 +16,13 @@
    > /* all clang versions usable with the kernel support KASAN ABI version 5 */
    > #define KASAN_ABI_VERSION 5
    >
    > +#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
    > /* emulate gcc's __SANITIZE_ADDRESS__ flag */
    > -#if __has_feature(address_sanitizer)
    > #define __SANITIZE_ADDRESS__
    > +#define __no_sanitize_address \
    > + __attribute__((no_sanitize("address", "hwaddress")))
    > +#else
    > +#define __no_sanitize_address
    > #endif
    >
    > /*
    > diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
    > index 2010493e1040..5776da43da97 100644
    > --- a/include/linux/compiler-gcc.h
    > +++ b/include/linux/compiler-gcc.h
    > @@ -143,6 +143,12 @@
    > #define KASAN_ABI_VERSION 3
    > #endif
    >
    > +#if __has_attribute(__no_sanitize_address__)
    > +#define __no_sanitize_address __attribute__((no_sanitize_address))
    > +#else
    > +#define __no_sanitize_address
    > +#endif

    Not really important but it's the name with leading and trailing
    underscores that is tested with __has_attribute() but then it's
    the naked 'no_sanitize_address' that is used in the attribute.

    -- Luc

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