The patch titled
Subject: kasan: mark addr_has_metadata __always_inline
has been added to the -mm mm-unstable branch. Its filename is
kasan-mark-addr_has_metadata-__always_inline.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-mark-addr_has_metadata-__always_inline.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: kasan: mark addr_has_metadata __always_inline
Date: Wed, 15 Feb 2023 14:00:56 +0100
Patch series "objtool warning fixes", v2.
These are three of the easier fixes for objtool warnings around
kasan/kmsan/kcsan. I dropped one patch since Peter had come up with a
better fix, and adjusted the changelog text based on feedback.
This patch (of 3):
When the compiler decides not to inline this function, objtool complains
about incorrect UACCESS state:
mm/kasan/generic.o: warning: objtool: __asan_load2+0x11: call to addr_has_metadata() with UACCESS enabled
Link: https://lore.kernel.org/all/20230208164011.2287122-1-arnd@xxxxxxxxxx/
Link: https://lkml.kernel.org/r/20230215130058.3836177-2-arnd@xxxxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/kasan.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/kasan/kasan.h~kasan-mark-addr_has_metadata-__always_inline
+++ a/mm/kasan/kasan.h
@@ -297,7 +297,7 @@ static inline const void *kasan_shadow_t
<< 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 add
#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));
}
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
maple_tree-reduce-stack-usage-with-gcc-9-and-earlier.patch
kasan-mark-addr_has_metadata-__always_inline.patch
kmsan-disable-ftrace-in-kmsan-core-code.patch
objtool-add-uaccess-exceptions-for-__tsan_volatile_read-write.patch
