On Thu, Feb 11, 2021 at 4:22 PM Vincenzo Frascino <[email protected]> wrote: > > The simplification of mte_get_random_tag() caused the introduction of the > warning below: > > In file included from arch/arm64/include/asm/kasan.h:9, > from include/linux/kasan.h:16, > from mm/kasan/common.c:14: > mm/kasan/common.c: In function ‘mte_get_random_tag’: > arch/arm64/include/asm/mte-kasan.h:45:9: warning: ‘addr’ is used > uninitialized [-Wuninitialized] > 45 | asm(__MTE_PREAMBLE "irg %0, %0" > | > > Fix the warning using "=r" for the address in the asm inline. > > Fixes: c8f8de4c0887 ("arm64: kasan: simplify and inline MTE functions") > Cc: Catalin Marinas <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: Andrey Konovalov <[email protected]> > Cc: Andrew Morton <[email protected]> > Signed-off-by: Vincenzo Frascino <[email protected]> > --- > > This patch is based on linux-next/akpm > > arch/arm64/include/asm/mte-kasan.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/mte-kasan.h > b/arch/arm64/include/asm/mte-kasan.h > index 3d58489228c0..7ab500e2ad17 100644 > --- a/arch/arm64/include/asm/mte-kasan.h > +++ b/arch/arm64/include/asm/mte-kasan.h > @@ -43,7 +43,7 @@ static inline u8 mte_get_random_tag(void) > void *addr; > > asm(__MTE_PREAMBLE "irg %0, %0" > - : "+r" (addr)); > + : "=r" (addr)); > > return mte_get_ptr_tag(addr); > } > -- > 2.30.0 >
Acked-by: Andrey Konovalov <[email protected]> Tested-by: Andrey Konovalov <[email protected]>
