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Subject[PATCH] mm/hotplug: remove unnecessary BUG_ON in __offline_pages()
I think we can remove "BUG_ON(start_pfn >= end_pfn)" in __offline_pages(),
because in memory_block_action() "nr_pages = PAGES_PER_SECTION * sections_per_block"
is always greater than 0.

memory_block_action()
offline_pages()
__offline_pages()
BUG_ON(start_pfn >= end_pfn)

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
---
mm/memory_hotplug.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index ca1dd3a..8e333f9 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1472,7 +1472,6 @@ static int __ref __offline_pages(unsigned long start_pfn,
struct zone *zone;
struct memory_notify arg;

- BUG_ON(start_pfn >= end_pfn);
/* at least, alignment against pageblock is necessary */
if (!IS_ALIGNED(start_pfn, pageblock_nr_pages))
return -EINVAL;
--
1.8.2.2


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