The patch titled
Subject: arm64: fix warning in mte_get_random_tag()
has been added to the -mm tree. Its filename is
arm64-kasan-simplify-and-inline-mte-functions-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/arm64-kasan-simplify-and-inline-mte-functions-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/arm64-kasan-simplify-and-inline-mte-functions-fix.patch
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------------------------------------------------------
From: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Subject: arm64: fix warning in mte_get_random_tag()
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.
Link: https://lkml.kernel.org/r/20210211152208.23811-1-vincenzo.frascino@xxxxxxx
Fixes: c8f8de4c0887 ("arm64: kasan: simplify and inline MTE functions")
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Acked-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Tested-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/mte-kasan.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/include/asm/mte-kasan.h~arm64-kasan-simplify-and-inline-mte-functions-fix
+++ a/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);
}
_
Patches currently in -mm which might be from vincenzo.frascino@xxxxxxx are
arm64-kasan-simplify-and-inline-mte-functions-fix.patch
