mm: replace strict_strtoul() with kstrtoul()

The use of strict_strtoul() is not preferred, because strict_strtoul() is
obsolete.  Thus, kstrtoul() should be used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index c8d7f31..e126b0e 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1639,7 +1639,7 @@
 	else if (strncmp(buf, "scan=", 5) == 0) {
 		unsigned long secs;
 
-		ret = strict_strtoul(buf + 5, 0, &secs);
+		ret = kstrtoul(buf + 5, 0, &secs);
 		if (ret < 0)
 			goto out;
 		stop_scan_thread();