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    Subject[PATCH v8 21/43] kasan: kasan_non_canonical_hook only for software modes
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    This is a preparatory commit for the upcoming addition of a new hardware
    tag-based (MTE-based) KASAN mode.

    kasan_non_canonical_hook() is only applicable to KASAN modes that use
    shadow memory, and won't be needed for hardware tag-based KASAN.

    No functional changes for software modes.

    Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
    Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
    Reviewed-by: Marco Elver <elver@google.com>
    ---
    Change-Id: Icc9f5ef100a2e86f3a4214a0c3131a68266181b2
    ---
    mm/kasan/report.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/mm/kasan/report.c b/mm/kasan/report.c
    index 5d5733831ad7..594bad2a3a5e 100644
    --- a/mm/kasan/report.c
    +++ b/mm/kasan/report.c
    @@ -403,7 +403,8 @@ bool kasan_report(unsigned long addr, size_t size, bool is_write,
    return ret;
    }

    -#ifdef CONFIG_KASAN_INLINE
    +#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \
    + defined(CONFIG_KASAN_INLINE)
    /*
    * With CONFIG_KASAN_INLINE, accesses to bogus pointers (outside the high
    * canonical half of the address space) cause out-of-bounds shadow memory reads
    --
    2.29.1.341.ge80a0c044ae-goog
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