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    Subject[PATCH 1/4] kasan: mark addr_has_metadata __always_inline
    Date
    From: Arnd Bergmann <arnd@arndb.de>

    When the compiler decides not to inline this function, objdump
    complains about incorrect UACCESS state:

    mm/kasan/generic.o: warning: objtool: __asan_load2+0x11: call to addr_has_metadata() with UACCESS enabled

    Signed-off-by: Arnd Bergmann <arnd@arndb.de>
    ---
    mm/kasan/kasan.h | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
    index 3231314e071f..9377b0789edc 100644
    --- a/mm/kasan/kasan.h
    +++ b/mm/kasan/kasan.h
    @@ -297,7 +297,7 @@ static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
    << KASAN_SHADOW_SCALE_SHIFT);
    }

    -static inline bool addr_has_metadata(const void *addr)
    +static __always_inline bool addr_has_metadata(const void *addr)
    {
    return (kasan_reset_tag(addr) >=
    kasan_shadow_to_mem((void *)KASAN_SHADOW_START));
    @@ -316,7 +316,7 @@ bool kasan_check_range(unsigned long addr, size_t size, bool write,

    #else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */

    -static inline bool addr_has_metadata(const void *addr)
    +static __always_inline bool addr_has_metadata(const void *addr)
    {
    return (is_vmalloc_addr(addr) || virt_addr_valid(addr));
    }
    --
    2.39.1
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