[PATCH] mm: Use BUG_ON directly instead of a if condition followed by BUG

[zhong jiang]

The if condition can be removed if we use BUG_ON directly.
The issule is detected with the help of Coccinelle.

Signed-off-by: zhong jiang <zhongji...@huawei.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 38d94b7..280b26c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1888,8 +1888,7 @@ void __ref remove_memory(int nid, u64 start, u64 size)
         */
        ret = walk_memory_range(PFN_DOWN(start), PFN_UP(start + size - 1), NULL,
                                check_memblock_offlined_cb);
-       if (ret)
-               BUG();
+       BUG(ret);
 
        /* remove memmap entry */
        firmware_map_remove(start, start + size, "System RAM");
-- 
1.7.12.4