maccess: rename strnlen_unsafe_user to strnlen_user_nofault

This matches the naming of strnlen_user, and also makes it more clear
what the function is supposed to do.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200521152301.2587579-9-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/maccess.c b/mm/maccess.c
index 50b27fb..88ab30c 100644
--- a/mm/maccess.c
+++ b/mm/maccess.c
@@ -260,7 +260,7 @@ long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr,
 }
 
 /**
- * strnlen_unsafe_user: - Get the size of a user string INCLUDING final NUL.
+ * strnlen_user_nofault: - Get the size of a user string INCLUDING final NUL.
  * @unsafe_addr: The string to measure.
  * @count: Maximum count (including NUL)
  *
@@ -275,7 +275,7 @@ long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr,
  * Unlike strnlen_user, this can be used from IRQ handler etc. because
  * it disables pagefaults.
  */
-long strnlen_unsafe_user(const void __user *unsafe_addr, long count)
+long strnlen_user_nofault(const void __user *unsafe_addr, long count)
 {
 	mm_segment_t old_fs = get_fs();
 	int ret;