From: Arnd Bergmann arnd@arndb.de
commit fb646a4cd3f0ff27d19911bef7b6622263723df6 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/kasan/kasan.h | 3 +++ 1 file changed, 3 insertions(+)
--- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -629,4 +629,7 @@ void __hwasan_storeN_noabort(unsigned lo
void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size);
+void kasan_tag_mismatch(unsigned long addr, unsigned long access_info, + unsigned long ret_ip); + #endif /* __MM_KASAN_KASAN_H */