From: Julia Lawall <[email protected]>
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/)
// <smpl>
@ 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 <linux/jiffies.h>
@ no_include depends on !include && change_compare_np @
@@
#include <linux/...>
+ #include <linux/jiffies.h>
// </smpl>
Signed-off-by: Julia Lawall <[email protected]>
---
diff -u -p linux-2.6/fs/autofs/dirhash.c linuxcopy/fs/autofs/dirhash.c
--- linux-2.6/fs/autofs/dirhash.c 2006-11-30 19:05:26.000000000 +0100
+++ linuxcopy/fs/autofs/dirhash.c 2007-12-25 20:53:48.000000000 +0100
@@ -47,7 +47,7 @@ struct autofs_dir_ent *autofs_expire(str
return NULL; /* No entries */
/* We keep the list sorted by last_usage and want old stuff */
ent = list_entry(dh->expiry_head.next, struct autofs_dir_ent, exp);
- if (jiffies - ent->last_usage < timeout)
+ if (time_before(jiffies, ent->last_usage + timeout))
break;
/* Move to end of list in case expiry isn't desirable */
autofs_update_usage(dh, ent);
--
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