From 93ea9964d14ad583492ffb9ab7543f015876aaf2 Mon Sep 17 00:00:00 2001
From: Mel Gorman
Date: Thu, 19 May 2016 17:14:13 -0700
Subject: mm, page_alloc: remove field from alloc_context

The classzone_idx can be inferred from preferred_zoneref so remove the
unnecessary field and save stack space.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/internal.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'mm/internal.h')

diff --git a/mm/internal.h b/mm/internal.h
index d1ddd71c1bbf..3ac544f1963f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -103,12 +103,13 @@ struct alloc_context {
 	struct zonelist *zonelist;
 	nodemask_t *nodemask;
 	struct zoneref *preferred_zoneref;
-	int classzone_idx;
 	int migratetype;
 	enum zone_type high_zoneidx;
 	bool spread_dirty_pages;
 };
 
+#define ac_classzone_idx(ac) zonelist_zone_idx(ac->preferred_zoneref)
+
 /*
  * Locate the struct page for both the matching buddy in our
  * pair (buddy1) and the combined O(n+1) page they form (page).
-- 
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