linux-kernel - [PATCH v3 4/4] mm/memory_hotplug: Drop node_online check in unregister_mem_sect_under

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Message-Id: <20180815144219.6014-5-osalvador@techadventures.net>
Date:   Wed, 15 Aug 2018 16:42:19 +0200
From:   Oscar Salvador <osalvador@...hadventures.net>
To:     akpm@...ux-foundation.org
Cc:     mhocko@...e.com, vbabka@...e.cz, dan.j.williams@...el.com,
        yasu.isimatu@...il.com, jonathan.cameron@...wei.com,
        david@...hat.com, Pavel.Tatashin@...rosoft.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v3 4/4] mm/memory_hotplug: Drop node_online check in unregister_mem_sect_under_nodes

From: Oscar Salvador <osalvador@...e.de>

We are getting the nid from the pages that are not yet removed,
but a node can only be offline when its memory/cpu's have been removed.
Therefore, we know that the node is still online.

Signed-off-by: Oscar Salvador <osalvador@...e.de>
---
 drivers/base/node.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 81b27b5b1f15..b23769e4fcbb 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -465,8 +465,6 @@ void unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
 
 		if (nid < 0)
 			continue;
-		if (!node_online(nid))
-			continue;
 		/*
 		 * It is possible that NODEMASK_ALLOC fails due to memory
 		 * pressure.
-- 
2.13.6