[PATCH V3 1/13] block: xen: use time_is_before_eq_jiffies() instead of open coding it

[Qing Wang]

From: Wang Qing <wangqing@xxxxxxxx>

Use the helper function time_is_{before,after}_jiffies() to improve
code readability.

Signed-off-by: Wang Qing <wangqing@xxxxxxxx>
---
 drivers/block/xen-blkback/blkback.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index d1e2646..aecc1f4
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -42,6 +42,7 @@
 #include <linux/delay.h>
 #include <linux/freezer.h>
 #include <linux/bitmap.h>
+#include <linux/jiffies.h>
 
 #include <xen/events.h>
 #include <xen/page.h>
@@ -134,8 +135,8 @@ module_param(log_stats, int, 0644);
 
 static inline bool persistent_gnt_timeout(struct persistent_gnt *persistent_gnt)
 {
-	return pgrant_timeout && (jiffies - persistent_gnt->last_used >=
-			HZ * pgrant_timeout);
+	return pgrant_timeout && time_is_before_eq_jiffies(
+			persistent_gnt->last_used + HZ * pgrant_timeout);
 }
 
 #define vaddr(page) ((unsigned long)pfn_to_kaddr(page_to_pfn(page)))
-- 
2.7.4