Messages in this thread Patch in this message | | | Date | Tue, 6 Jan 2015 15:44:15 +0200 | From | Asaf Vertz <> | Subject | [PATCH] dm bufio: fix time comparison |
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To be future-proof and for better readability the time comparison modified to use time_after_eq() instead of plain, error-prone math.
Signed-off-by: Asaf Vertz <asaf.vertz@tandemg.com> --- drivers/md/dm-bufio.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index c33b497..86dbbc7 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -11,6 +11,7 @@ #include <linux/device-mapper.h> #include <linux/dm-io.h> #include <linux/slab.h> +#include <linux/jiffies.h> #include <linux/vmalloc.h> #include <linux/shrinker.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) { - 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) -- 1.7.0.4
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