From c35ce7f8b3d97b476d59aba9759bc965f5413d37 Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Mon, 8 Apr 2019 20:35:52 +0800 Subject: [PATCH] mm, memory_hotplug: drop pointless block alignment checks from __offline_pages mainline inclusion from mainline-5.0-rc1 commit 6cc2baf600eca841549e182b471d5c7b8c4143c3 category: bugfix bugzilla: 13472 CVE: NA ------------------------------------------------ This function is never called from a context which would provide misaligned pfn range so drop the pointless check. Link: http://lkml.kernel.org/r/20181107101830.17405-4-mhocko@kernel.org Signed-off-by: Michal Hocko Reviewed-by: Andrew Morton Reviewed-by: Oscar Salvador Reviewed-by: Anshuman Khandual Cc: Baoquan He Cc: Oscar Salvador Cc: William Kucharski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: zhong jiang Reviewed-by: Jing Xiangfeng Signed-off-by: Yang Yingliang --- mm/memory_hotplug.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index e486d32557e0..ccaec2efe15a 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1648,12 +1648,6 @@ static int __ref __offline_pages(unsigned long start_pfn, struct zone *zone; struct memory_notify arg; - /* at least, alignment against pageblock is necessary */ - if (!IS_ALIGNED(start_pfn, pageblock_nr_pages)) - return -EINVAL; - if (!IS_ALIGNED(end_pfn, pageblock_nr_pages)) - return -EINVAL; - mem_hotplug_begin(); /* This makes hotplug much easier...and readable. -- GitLab