From: Oscar Salvador <osalvador@techadventures.net>
To: akpm@linux-foundation.org
Cc: mhocko@suse.com, vbabka@suse.cz, dan.j.williams@intel.com,
yasu.isimatu@gmail.com, jonathan.cameron@huawei.com,
david@redhat.com, Pavel.Tatashin@microsoft.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Oscar Salvador <osalvador@suse.de>
Subject: [PATCH v3 2/4] mm/memory_hotplug: Drop mem_blk check from unregister_mem_sect_under_nodes
Date: Wed, 15 Aug 2018 16:42:17 +0200 [thread overview]
Message-ID: <20180815144219.6014-3-osalvador@techadventures.net> (raw)
In-Reply-To: <20180815144219.6014-1-osalvador@techadventures.net>
From: Oscar Salvador <osalvador@suse.de>
Before calling to unregister_mem_sect_under_nodes(),
remove_memory_section() already checks if we got a valid memory_block.
No need to check that again in unregister_mem_sect_under_nodes().
If more functions start using unregister_mem_sect_under_nodes() in the
future, we can always place a WARN_ON to catch null mem_blk's so we can
safely back off.
For now, let us keep the check in remove_memory_section() since it is the
only function that uses it.
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
---
drivers/base/node.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 1ac4c36e13bb..dd3bdab230b2 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -455,10 +455,6 @@ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
NODEMASK_ALLOC(nodemask_t, unlinked_nodes, GFP_KERNEL);
unsigned long pfn, sect_start_pfn, sect_end_pfn;
- if (!mem_blk) {
- NODEMASK_FREE(unlinked_nodes);
- return -EFAULT;
- }
if (!unlinked_nodes)
return -ENOMEM;
nodes_clear(*unlinked_nodes);
--
2.13.6
next prev parent reply other threads:[~2018-08-15 14:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-15 14:42 [PATCH v3 0/4] Refactoring for remove_memory_section/unregister_mem_sect_under_nodes Oscar Salvador
2018-08-15 14:42 ` [PATCH v3 1/4] mm/memory-hotplug: Drop unused args from remove_memory_section Oscar Salvador
2018-08-16 17:45 ` Pasha Tatashin
2018-08-15 14:42 ` Oscar Salvador [this message]
2018-08-16 17:53 ` [PATCH v3 2/4] mm/memory_hotplug: Drop mem_blk check from unregister_mem_sect_under_nodes Pasha Tatashin
2018-08-16 18:43 ` David Hildenbrand
2018-08-15 14:42 ` [PATCH v3 3/4] mm/memory_hotplug: Refactor unregister_mem_sect_under_nodes Oscar Salvador
2018-08-15 22:01 ` Andrew Morton
2018-08-16 7:48 ` Oscar Salvador
2018-08-16 18:22 ` Pasha Tatashin
2018-08-15 14:42 ` [PATCH v3 4/4] mm/memory_hotplug: Drop node_online check in unregister_mem_sect_under_nodes Oscar Salvador
2018-08-16 18:43 ` David Hildenbrand
2018-08-16 18:59 ` Pasha Tatashin
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