Refine comment for dummy macro compilation guard

Change-Id: I85c21c24bbd5856a5a22cbd983f5150a56c13345

Author: lumynou5

list.h

@@ -412,7 +412,9 @@ static inline void list_move_tail(struct list_head *node,
          &entry->member != (head);                                 \
          entry = list_entry(entry->member.next, typeof(*entry), member))
 #else
-// The negative width bit-field makes a compile-time error for use of this.
+/* The negative width bit-field makes a compile-time error for use of this. It
+ * works in the same way as BUILD_BUG_ON_ZERO macro of Linux kernel.
+ */
 #define list_for_each_entry(entry, head, member) \
     for (entry = (void *) 1; sizeof(struct { int : -1; }); ++(entry))
 #endif

scripts/checksums

@@ -1,3 +1,3 @@
 db6784ff3917888db4d1dceaa0570d99ed40e762  queue.h
-943e0653daa1d51c9f61d1652a644588af5969e2  list.h
+27d7a57c6bab59beda9178f240db1aa7c0062361  list.h
 3bb0192cee08d165fd597a9f6fbb404533e28fcf  scripts/check-commitlog.sh