@@ -16,6 +16,7 @@
#include <linux/pfn_t.h>
#include <linux/libnvdimm.h>
#include <linux/delay.h>
+#include <linux/jiffies.h>
#include "dm-io-tracker.h"
#define DM_MSG_PREFIX "writecache"
@@ -1971,8 +1972,8 @@ static void writecache_writeback(struct work_struct *work)
while (!list_empty(&wc->lru) &&
(wc->writeback_all ||
wc->freelist_size + wc->writeback_size <= wc->freelist_low_watermark ||
- (jiffies - container_of(wc->lru.prev, struct wc_entry, lru)->age >=
- wc->max_age - wc->max_age / MAX_AGE_DIV))) {
+ time_after_eq(jiffies, container_of(wc->lru.prev, struct wc_entry, lru)->age +
+ wc->max_age - wc->max_age / MAX_AGE_DIV)) {
n_walked++;
if (unlikely(n_walked > WRITEBACK_LATENCY) &&