lru_cache: remove use of seq_printf return value

The seq_printf return value, because it's frequently misused,
will eventually be converted to void.

See: commit 1f33c41c ("seq_file: Rename seq_overflow() to
     seq_has_overflowed() and make public")
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Lars Ellenberg <drbd-dev@lists.linbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/lru_cache.c

@@ -247,10 +247,11 @@ size_t lc_seq_printf_stats(struct seq_file *seq, struct lru_cache *lc)
 	 * progress) and "changed", when this in fact lead to an successful
 	 * update of the cache.
 	 */
-	return seq_printf(seq, "\t%s: used:%u/%u "
-		"hits:%lu misses:%lu starving:%lu locked:%lu changed:%lu\n",
-		lc->name, lc->used, lc->nr_elements,
-		lc->hits, lc->misses, lc->starving, lc->locked, lc->changed);
+	seq_printf(seq, "\t%s: used:%u/%u hits:%lu misses:%lu starving:%lu locked:%lu changed:%lu\n",
+		   lc->name, lc->used, lc->nr_elements,
+		   lc->hits, lc->misses, lc->starving, lc->locked, lc->changed);
+
+	return 0;
 }
 
 static struct hlist_head *lc_hash_slot(struct lru_cache *lc, unsigned int enr)