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mm/sparse.c: remove NULL check in clear_hwpoisoned_pages() 

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

This check was added in commit 95a4774d05 ("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 by commit
ba72b4c8cf ("mm/sparsemem: support sub-section hotplug"), so there is no
longer a possibility that memmap can be NULL.

Link: http://lkml.kernel.org/r/20190829035151.20975-1-alastair@d-silva.org
Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alastair D'Silva 2019-09-23 15:36:33 -07:00 committed by Linus Torvalds
parent 9f82883c6d
commit 5ed867037e
1 changed files with 0 additions and 3 deletions
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mm/sparse.c
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@ -896,9 +896,6 @@ 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