Apr 20 2008

drivers/net/appletalk: use time_before, time_before_eq, etc 

Author: Julia Lawall <julia@diku.dk>

The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.

A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// 
@ change_compare_np @
expression E;
@@

(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)

@ include depends on change_compare_np @
@@

#include 

@ no_include depends on !include && change_compare_np @
@@

  #include 
+ #include 
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Andrew Morton 
Signed-off-by: David S. Miller 

---
 drivers/net/appletalk/cops.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
 
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index 65b901e..82e9a5b 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -69,6 +69,7 @@ static const char *version =
 #include <linux/atalk.h>
 #include <linux/spinlock.h>
 #include <linux/bitops.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -503,7 +504,7 @@ static void cops_reset(struct net_device *dev, int sleep)
                         long snap=jiffies;
 
 			/* Let card finish initializing, about 1/3 second */
-	                while(jiffies-snap<HZ/3)
+			while (time_before(jiffies, snap + HZ/3))
                                 schedule();
                 }
                 else

qlambert