[PATCH] mm: Remove NULL check in clear_hwpoisoned_pages()

["Alastair D'Silva" <alastair@d-silva.org>]

There is no possibility for memmap to be NULL in the current
codebase.

This check was added in commit 95a4774d055c ("memory-hotplug:
update mce_bad_pages when removing the memory")
where memmap was originally inited to NULL, and only conditionally
given a value.

The code that could have passed a NULL has been removed, so there
is no longer a possibility that memmap can be NULL.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
---
 mm/sparse.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index 78979c142b7d..9f7e3682cdcb 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -754,9 +754,6 @@ static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
 {
 	int i;
 
-	if (!memmap)
-		return;
-
 	/*
 	 * A further optimization is to have per section refcounted
 	 * num_poisoned_pages.  But that would need more space per memmap, so
-- 
2.21.0