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Subject[PATCH v4 7/7] mm,hwpoison: remove stale code
Date
Currently we call shake_page and then check whether the page is Buddy
because shake_page calls drain_all_pages, which sends pcp-pages back to
the buddy freelists, so we could have a chance to handle free pages.

get_hwpoison_page already calls drain_all_pages, and we do call
get_hwpoison_page right before coming here, so we should be on the safe
side.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
---
mm/memory-failure.c | 12 ------------
1 file changed, 12 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 7fba4ba201d5..f68cb5e3b320 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1423,18 +1423,6 @@ int memory_failure(unsigned long pfn, int flags)
* walked by the page reclaim code, however that's not a big loss.
*/
shake_page(p, 0);
- /* shake_page could have turned it free. */
- if (!PageLRU(p) && is_free_buddy_page(p)) {
- if (!take_page_off_buddy(p))
- res = -EBUSY;
-
- if (flags & MF_COUNT_INCREASED)
- action_result(pfn, MF_MSG_BUDDY, res ? MF_FAILED : MF_RECOVERED);
- else
- action_result(pfn, MF_MSG_BUDDY_2ND, res ? MF_FAILED : MF_RECOVERED);
-
- return res;
- }

lock_page(p);

--
2.26.2
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