From: Ben Pfaff <blp@cs.stanford.edu>
Date: Fri, 21 Jul 2006 02:05:37 +0000 (+0000)
Subject: Improve comment on sema_down.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de76134e7b5d21ba0551657bbfc0dbb24e3c2312;p=pintos-anon

Improve comment on sema_down.
Thanks to Haobo Xu for pointing this out.
---

diff --git a/src/threads/synch.c b/src/threads/synch.c
index c2764bc..317c68a 100644
--- a/src/threads/synch.c
+++ b/src/threads/synch.c
@@ -55,8 +55,8 @@ sema_init (struct semaphore *sema, unsigned value)
 
    This function may sleep, so it must not be called within an
    interrupt handler.  This function may be called with
-   interrupts disabled, but interrupts will be turned back on if
-   we need to sleep. */
+   interrupts disabled, but if it sleeps then the next scheduled
+   thread will probably turn interrupts back on. */
 void
 sema_down (struct semaphore *sema) 
 {