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

From: Alastair D'Silva
Date: Wed Aug 28 2019 - 23:52:03 EST

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

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@xxxxxxxxxxx>
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