The patch titled Subject: kasan: add kasan_tag_mismatch prototype has been added to the -mm mm-unstable branch. Its filename is kasan-add-kasan_tag_mismatch-prototype.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days

------------------------------------------------------ From: Arnd Bergmann arnd@arndb.de Subject: kasan: add kasan_tag_mismatch prototype Date: Tue, 9 May 2023 16:57:20 +0200

The kasan sw-tags implementation contains one function that is only called from assembler and has no prototype in a header. This causes a W=1 warning:

mm/kasan/sw_tags.c:171:6: warning: no previous prototype for 'kasan_tag_mismatch' [-Wmissing-prototypes] 171 | void kasan_tag_mismatch(unsigned long addr, unsigned long access_info,

Add a prototype in the local header to get a clean build.

Link: https://lkml.kernel.org/r/20230509145735.9263-1-arnd@kernel.org Signed-off-by: Arnd Bergmann arnd@arndb.de Cc: Alexander Potapenko glider@google.com Cc: Andrey Konovalov andreyknvl@gmail.com Cc: Andrey Ryabinin ryabinin.a.a@gmail.com Cc: Dmitry Vyukov dvyukov@google.com Cc: Marco Elver elver@google.com Cc: Vincenzo Frascino vincenzo.frascino@arm.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/kasan/kasan.h | 3 +++ 1 file changed, 3 insertions(+)

--- a/mm/kasan/kasan.h~kasan-add-kasan_tag_mismatch-prototype +++ a/mm/kasan/kasan.h @@ -646,4 +646,7 @@ void *__hwasan_memset(void *addr, int c, void *__hwasan_memmove(void *dest, const void *src, size_t len); void *__hwasan_memcpy(void *dest, const void *src, size_t len);

+void kasan_tag_mismatch(unsigned long addr, unsigned long access_info, + unsigned long ret_ip); + #endif /* __MM_KASAN_KASAN_H */ _

Patches currently in -mm which might be from arnd@arndb.de are

kasan-add-kasan_tag_mismatch-prototype.patch kasan-use-internal-prototypes-matching-gcc-13-builtins.patch