[PATCH 2/2] mm,memory_hotplug: Drop redundant hugepage_migration_supported check

From: Oscar Salvador <osalvador@suse.de>
To: akpm@linux-foundation.org
Cc: mhocko@suse.com, david@redhat.com, mike.kravetz@oracle.com,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Oscar Salvador <osalvador@suse.de>
Subject: [PATCH 2/2] mm,memory_hotplug: Drop redundant hugepage_migration_supported check
Date: Mon,  4 Mar 2019 09:51:47 +0100	[thread overview]
Message-ID: <20190304085147.556-3-osalvador@suse.de> (raw)
In-Reply-To: <20190304085147.556-1-osalvador@suse.de>

has_unmovable_pages() does alreay check whether the hugetlb page supports
migration, so all non-migrateable hugetlb pages should have been caught there.
Let us drop the check from scan_movable_pages() as is redundant.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
---
 mm/memory_hotplug.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 0f479c710615..2dfd9a0b0832 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1346,8 +1346,7 @@ static unsigned long scan_movable_pages(unsigned long start, unsigned long end)
 		if (!PageHuge(page))
 			continue;
 		head = compound_head(page);
-		if (hugepage_migration_supported(page_hstate(head)) &&
-		    page_huge_active(head))
+		if (page_huge_active(head))
 			return pfn;
 		skip = (1 << compound_order(head)) - (page - head);
 		pfn += skip - 1;
-- 
2.13.7

