linux-kernel - [PATCH] mm/page_alloc: remove redundant init code for ZONE

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Message-Id: <20170209141731.60208-1-richard.weiyang@gmail.com>
Date:   Thu,  9 Feb 2017 22:17:31 +0800
From:   Wei Yang <richard.weiyang@...il.com>
To:     akpm@...ux-foundation.org, mgorman@...hsingularity.net,
        mhocko@...e.com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Wei Yang <richard.weiyang@...il.com>
Subject: [PATCH] mm/page_alloc: remove redundant init code for ZONE_MOVABLE

arch_zone_lowest/highest_possible_pfn[] is set to 0 and [ZONE_MOVABLE] is
skipped in the loop. No need to reset them to 0 again.

This patch just removes the redundant code.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
---
 mm/page_alloc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 51c60c0eadcb..cc9695d14226 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6279,8 +6279,6 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
 
 		start_pfn = end_pfn;
 	}
-	arch_zone_lowest_possible_pfn[ZONE_MOVABLE] = 0;
-	arch_zone_highest_possible_pfn[ZONE_MOVABLE] = 0;
 
 	/* Find the PFNs that ZONE_MOVABLE begins at in each node */
 	memset(zone_movable_pfn, 0, sizeof(zone_movable_pfn));
-- 
2.11.0