Merge "Nullability check for utsname module" am: 85fc6b141e

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2478475

Change-Id: I87059a7c2f882b27672e4c2f3455eb20021645f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/libc/include/sys/utsname.h b/libc/include/sys/utsname.h
index 1fa3187..aa8c1a0 100644
--- a/libc/include/sys/utsname.h
+++ b/libc/include/sys/utsname.h
@@ -62,6 +62,6 @@
  *
  * Returns 0 on success, and returns -1 and sets `errno` on failure.
  */
-int uname(struct utsname* __buf);
+int uname(struct utsname* _Nonnull __buf);
 
 __END_DECLS