trusty: add warn_unused_result for mmap() & munmap() am: 277c60c09b
Original change: https://android-review.googlesource.com/c/trusty/external/musl/+/3256820
Change-Id: I78416690f945bdf3035d78e5da705d5a428dc96b
Signed-off-by: Automerger Merge Worker <[email protected]>
diff --git a/include/features.h b/include/features.h
index f4d651e..57b4590 100644
--- a/include/features.h
+++ b/include/features.h
@@ -35,4 +35,10 @@
#define _Noreturn
#endif
+#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || defined(__clang__)
+#define __warn_unused_result __attribute__((__warn_unused_result__))
+#else
+#define __warn_unused_result
+#endif
+
#endif
diff --git a/include/sys/mman.h b/include/sys/mman.h
index d0761b1..6378318 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -109,8 +109,8 @@
#include <bits/mman.h>
-void *mmap (void *, size_t, int, int, int, off_t);
-int munmap (void *, size_t);
+__warn_unused_result void *mmap (void *, size_t, int, int, int, off_t);
+__warn_unused_result int munmap (void *, size_t);
int mprotect (void *, size_t, int);
int msync (void *, size_t, int);
