nfsd: use ktime_get_seconds() for timestamps

The delegation logic in nfsd uses the somewhat inefficient
seconds_since_boot() function to record time intervals.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfs4state.c

@@ -854,7 +854,7 @@ static void nfs4_free_deleg(struct nfs4_stid *stid)
 static DEFINE_SPINLOCK(blocked_delegations_lock);
 static struct bloom_pair {
 	int	entries, old_entries;
-	time_t	swap_time;
+	time64_t swap_time;
 	int	new; /* index into 'set' */
 	DECLARE_BITMAP(set[2], 256);
 } blocked_delegations;
@@ -866,15 +866,15 @@ static int delegation_blocked(struct knfsd_fh *fh)
 
 	if (bd->entries == 0)
 		return 0;
-	if (seconds_since_boot() - bd->swap_time > 30) {
+	if (ktime_get_seconds() - bd->swap_time > 30) {
 		spin_lock(&blocked_delegations_lock);
-		if (seconds_since_boot() - bd->swap_time > 30) {
+		if (ktime_get_seconds() - bd->swap_time > 30) {
 			bd->entries -= bd->old_entries;
 			bd->old_entries = bd->entries;
 			memset(bd->set[bd->new], 0,
 			       sizeof(bd->set[0]));
 			bd->new = 1-bd->new;
-			bd->swap_time = seconds_since_boot();
+			bd->swap_time = ktime_get_seconds();
 		}
 		spin_unlock(&blocked_delegations_lock);
 	}
@@ -904,7 +904,7 @@ static void block_delegations(struct knfsd_fh *fh)
 	__set_bit((hash>>8)&255, bd->set[bd->new]);
 	__set_bit((hash>>16)&255, bd->set[bd->new]);
 	if (bd->entries == 0)
-		bd->swap_time = seconds_since_boot();
+		bd->swap_time = ktime_get_seconds();
 	bd->entries += 1;
 	spin_unlock(&blocked_delegations_lock);
 }