linux-kernel - [PATCH 01/12] mm, page_alloc: Remove unnecessary parameter from zone_watermark_ok

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Date:	Mon, 24 Aug 2015 13:09:40 +0100
From:	Mel Gorman <mgorman@...hsingularity.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	Rik van Riel <riel@...hat.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Hocko <mhocko@...nel.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mel Gorman <mgorman@...hsingularity.net>
Subject: [PATCH 01/12] mm, page_alloc: Remove unnecessary parameter from zone_watermark_ok_safe

No user of zone_watermark_ok_safe() specifies alloc_flags. This patch
removes the unnecessary parameter.

Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
Acked-by: David Rientjes <rientjes@...gle.com>
Acked-by: Vlastimil Babka <vbabka@...e.cz>
Acked-by: Michal Hocko <mhocko@...e.com>
Reviewed-by: Christoph Lameter <cl@...ux.com>
---
 include/linux/mmzone.h | 2 +-
 mm/page_alloc.c        | 5 +++--
 mm/vmscan.c            | 4 ++--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 754c25966a0a..99cf4209cd45 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -802,7 +802,7 @@ void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx);
 bool zone_watermark_ok(struct zone *z, unsigned int order,
 		unsigned long mark, int classzone_idx, int alloc_flags);
 bool zone_watermark_ok_safe(struct zone *z, unsigned int order,
-		unsigned long mark, int classzone_idx, int alloc_flags);
+		unsigned long mark, int classzone_idx);
 enum memmap_context {
 	MEMMAP_EARLY,
 	MEMMAP_HOTPLUG,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index df959b7d6085..9b6bae688db8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2224,6 +2224,7 @@ static bool __zone_watermark_ok(struct zone *z, unsigned int order,
 		min -= min / 2;
 	if (alloc_flags & ALLOC_HARDER)
 		min -= min / 4;
+
 #ifdef CONFIG_CMA
 	/* If allocation can't use CMA areas don't use free CMA pages */
 	if (!(alloc_flags & ALLOC_CMA))
@@ -2253,14 +2254,14 @@ bool zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
 }
 
 bool zone_watermark_ok_safe(struct zone *z, unsigned int order,
-			unsigned long mark, int classzone_idx, int alloc_flags)
+			unsigned long mark, int classzone_idx)
 {
 	long free_pages = zone_page_state(z, NR_FREE_PAGES);
 
 	if (z->percpu_drift_mark && free_pages < z->percpu_drift_mark)
 		free_pages = zone_page_state_snapshot(z, NR_FREE_PAGES);
 
-	return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
+	return __zone_watermark_ok(z, order, mark, classzone_idx, 0,
 								free_pages);
 }
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8286938c70de..e950134c4b9a 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2450,7 +2450,7 @@ static inline bool compaction_ready(struct zone *zone, int order)
 	balance_gap = min(low_wmark_pages(zone), DIV_ROUND_UP(
 			zone->managed_pages, KSWAPD_ZONE_BALANCE_GAP_RATIO));
 	watermark = high_wmark_pages(zone) + balance_gap + (2UL << order);
-	watermark_ok = zone_watermark_ok_safe(zone, 0, watermark, 0, 0);
+	watermark_ok = zone_watermark_ok_safe(zone, 0, watermark, 0);
 
 	/*
 	 * If compaction is deferred, reclaim up to a point where
@@ -2933,7 +2933,7 @@ static bool zone_balanced(struct zone *zone, int order,
 			  unsigned long balance_gap, int classzone_idx)
 {
 	if (!zone_watermark_ok_safe(zone, order, high_wmark_pages(zone) +
-				    balance_gap, classzone_idx, 0))
+				    balance_gap, classzone_idx))
 		return false;
 
 	if (IS_ENABLED(CONFIG_COMPACTION) && order && compaction_suitable(zone,
-- 
2.4.6

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