mm: struct shrink_control: keep int fields together

Patch series "Reorderings in struct shrinker and struct shrink_control".

These structures are intensively used during reclaim and, displace other
data in cache, so there is no a reason they have int fields not grouped
together.

This patch (of 2):

gfp_t is of unsigned type, so let's move nid to keep them together.

Link: http://lkml.kernel.org/r/153199747930.21131.861043607301997810.stgit@localhost.localdomainSigned-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/shrinker.h

@@ -12,6 +12,9 @@
 struct shrink_control {
 	gfp_t gfp_mask;
 
+	/* current node being shrunk (for NUMA aware shrinkers) */
+	int nid;
+
 	/*
 	 * How many objects scan_objects should scan and try to reclaim.
 	 * This is reset before every call, so it is safe for callees
@@ -26,9 +29,6 @@ struct shrink_control {
 	 */
 	unsigned long nr_scanned;
 
-	/* current node being shrunk (for NUMA aware shrinkers) */
-	int nid;
-
 	/* current memcg being shrunk (for memcg aware shrinkers) */
 	struct mem_cgroup *memcg;
 };