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 -r -u -p a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
--- a/net/bluetooth/hci_core.c 2007-11-01 10:30:44.000000000 +0100
+++ b/net/bluetooth/hci_core.c 2007-12-23 20:44:22.000000000 +0100
@@ -38,6 +38,7 @@
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
+#include <linux/jiffies.h>
#include <net/sock.h>
#include <asm/system.h>
@@ -1321,7 +1322,8 @@ static inline void hci_sched_acl(struct
if (!test_bit(HCI_RAW, &hdev->flags)) {
/* ACL tx timeout must be longer than maximum
* link supervision timeout (40.9 seconds) */
- if (!hdev->acl_cnt && (jiffies - hdev->acl_last_tx) > (HZ * 45))
+ if (!hdev->acl_cnt &&
+ time_after(jiffies, hdev->acl_last_tx + HZ * 45))
hci_acl_tx_to(hdev);
}
@@ -1543,7 +1545,8 @@ static void hci_cmd_task(unsigned long a
BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
- if (!atomic_read(&hdev->cmd_cnt) && (jiffies - hdev->cmd_last_tx) > HZ) {
+ if (!atomic_read(&hdev->cmd_cnt) &&
+ time_after(jiffies, hdev->cmd_last_tx + HZ)) {
BT_ERR("%s command tx timeout", hdev->name);
atomic_set(&hdev->cmd_cnt, 1);
}
--
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