This macro is useful to calculate the second argument to sprintf_end(),
avoiding off-by-one bugs.

Cc: Kees Cook <kees@kernel.org>
Cc: Christopher Bazley <chris.bazley.wg14@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Marco Elver <elver@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 include/linux/array_size.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/array_size.h b/include/linux/array_size.h
index 06d7d83196ca..781bdb70d939 100644
--- a/include/linux/array_size.h
+++ b/include/linux/array_size.h
@@ -10,4 +10,10 @@
  */
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
 
+/**
+ * ENDOF - get a pointer to one past the last element in array @a
+ * @a: array
+ */
+#define ENDOF(a)  (a + ARRAY_SIZE(a))
+
 #endif  /* _LINUX_ARRAY_SIZE_H */
-- 
2.50.0