mm/memory-failure.c: remove obsolete comment

With the introduction of mf_mutex, most of memory error handling process
is mutually exclusive, so the in-line comment about subtlety about
double-checking PageHWPoison is no more correct.  So remove it.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Naoya Horiguchi <[email protected]>
Suggested-by: Mike Kravetz <[email protected]>
Reviewed-by: Miaohe Lin <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Reviewed-by: Yang Shi <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 0 insertions, 6 deletions

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 97a9ed8f87a9..0f6413a2f301 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -2150,12 +2150,6 @@ static int __soft_offline_page(struct page *page)
 		.gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL,
 	};
 
-	/*
-	 * Check PageHWPoison again inside page lock because PageHWPoison
-	 * is set by memory_failure() outside page lock. Note that
-	 * memory_failure() also double-checks PageHWPoison inside page lock,
-	 * so there's no race between soft_offline_page() and memory_failure().
-	 */
 	lock_page(page);
 	if (!PageHuge(page))
 		wait_on_page_writeback(page);