fix a build error on weird glibc

diff --git a/libbcachefs/util.h b/libbcachefs/util.h
index a9a17d9ed385a268585d4c415b9ddddf914b2cb6..99ad359fd48845b727aa510f9fd47c705de51af3 100644 (file)
--- a/libbcachefs/util.h
+++ b/libbcachefs/util.h
@@ -35,11 +35,11 @@ struct closure;
 #define atomic64_add_bug(i, v) BUG_ON(atomic64_add_return(i, v) < 0)
 
 #define memcpy(_dst, _src, _len)                                       \
-do {                                                                   \
+({                                                                     \
        BUG_ON(!((void *) (_dst) >= (void *) (_src) + (_len) ||         \
                 (void *) (_dst) + (_len) <= (void *) (_src)));         \
        memcpy(_dst, _src, _len);                                       \
-} while (0)
+})
 
 #else /* DEBUG */