linux-kernel - [PATCH 4/4] mm/memory_hotplug: Drop unnecessary checks from register_mem_sect_under

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Date:   Fri,  1 Jun 2018 14:53:21 +0200
From:   osalvador@...hadventures.net
To:     akpm@...ux-foundation.org
Cc:     mhocko@...e.com, vbabka@...e.cz, pasha.tatashin@...cle.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Oscar Salvador <osalvador@...e.de>
Subject: [PATCH 4/4] mm/memory_hotplug: Drop unnecessary checks from register_mem_sect_under_node

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

Callers of register_mem_sect_under_node() are always passing a valid
memory_block (not NULL), so we can safely drop the check for NULL.

In the same way, register_mem_sect_under_node() is only called in case
the node is online, so we can safely remove that check as well.

Signed-off-by: Oscar Salvador <osalvador@...e.de>
---
 drivers/base/node.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 248c712e8de5..681be04351bc 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -415,12 +415,7 @@ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid,
 	int ret;
 	unsigned long pfn, sect_start_pfn, sect_end_pfn;
 
-	if (!mem_blk)
-		return -EFAULT;
-
 	mem_blk->nid = nid;
-	if (!node_online(nid))
-		return 0;
 
 	sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
 	sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
-- 
2.13.6