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    Subject[PATCH v11 01/13] compiler.h, kasan: add __SANITIZE_ADDRESS__ check for __no_kasan_or_inline
    Date
    From: Sean Christopherson <sean.j.christopherson@intel.com>

    Add 'defined(__SANITIZE_ADDRESS__)' to check to determine whether
    __no_kasan_or_inline should be 'no_kasan' or 'inline'. Files that
    compile with KASAN disabled may not link to KASAN, in which case
    the __maybe_unused attribute added in the 'no_kasan' option can
    cause linker errors due to unused functions that manually invoke
    KASAN functions, e.g. read_word_at_a_time(), not being discarded.

    Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
    ---
    include/linux/compiler.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/include/linux/compiler.h b/include/linux/compiler.h
    index ab4711c63601..e7a863a3ac8c 100644
    --- a/include/linux/compiler.h
    +++ b/include/linux/compiler.h
    @@ -188,7 +188,7 @@ void __read_once_size(const volatile void *p, void *res, int size)
    __READ_ONCE_SIZE;
    }

    -#ifdef CONFIG_KASAN
    +#if defined(CONFIG_KASAN) && defined(__SANITIZE_ADDRESS__)
    /*
    * We can't declare function 'inline' because __no_sanitize_address confilcts
    * with inlining. Attempt to inline it may cause a build failure.
    --
    2.17.0
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