X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=blobdiff_plain;f=src%2Fthreads%2Fsynch.h;h=a19e88b181dff1208839ff890154aa69b299ce91;hp=9e464e3876400f60fafbc44a105f859ffd4b6938;hb=922af9ed1bd72fbf4a4c77ab6ddde78a7b6c3e97;hpb=eb5c6a0f64ab2b0a9efa853fa0ef53822af80047

diff --git a/src/threads/synch.h b/src/threads/synch.h
index 9e464e3..a19e88b 100644
--- a/src/threads/synch.h
+++ b/src/threads/synch.h
@@ -44,7 +44,8 @@ void cond_broadcast (struct condition *, struct lock *);
 /* Optimization barrier.
 
    The compiler will not reorder operations across an
-   optimization barrier. */
+   optimization barrier.  See "Optimization Barriers" in the
+   reference guide for more information.*/
 #define barrier() asm volatile ("" : : : "memory")
 
 #endif /* threads/synch.h */