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dm bufio: fix time comparison to use time_after_eq()

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To be future-proof and for better readability the time comparison
is modified to use time_after_eq() instead of plain, error-prone math.

Signed-off-by: Asaf Vertz <asaf.vertz@tandemg.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Asaf Vertz 2015-01-06 15:44:15 +02:00 • committed by Mike Snitzer
parent 0f30af98cb
commit f495339c44
1 changed files with 2 additions and 1 deletions
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3
drivers/md/dm-bufio.c
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@ -11,6 +11,7 @@
#include <linux/device-mapper.h> #include <linux/device-mapper.h>
#include <linux/dm-io.h> #include <linux/dm-io.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/shrinker.h> #include <linux/shrinker.h>
#include <linux/module.h> #include <linux/module.h>
@ -1739,7 +1740,7 @@ static unsigned get_max_age_hz(void)
static bool older_than(struct dm_buffer *b, unsigned long age_hz) static bool older_than(struct dm_buffer *b, unsigned long age_hz)
{ {
return (jiffies - b->last_accessed) >= age_hz; return time_after_eq(jiffies, b->last_accessed + age_hz);
} }
static void __evict_old_buffers(struct dm_bufio_client *c, unsigned long age_hz) static void __evict_old_buffers(struct dm_bufio_client *c, unsigned long age_hz)