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| author | Hugh Dickins <hughd@google.com> | 2022-03-25 04:09:49 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-25 05:06:45 +0300 |
| commit | bb43b14b576228c580bdc7e1aeeded54d540b5ef (patch) | |
| tree | f8e575109006b348dfaf9d0cfc70594923dbed6e /mm/memremap.c | |
| parent | 6f6a841fb77df0bc6383133b22feb9b015380a55 (diff) | |
| download | linux-bb43b14b576228c580bdc7e1aeeded54d540b5ef.tar.xz | |
mm: delete __ClearPageWaiters()
The PG_waiters bit is not included in PAGE_FLAGS_CHECK_AT_FREE, and
vmscan.c's free_unref_page_list() callers rely on that not to generate
bad_page() alerts. So __page_cache_release(), put_pages_list() and
release_pages() (and presumably copy-and-pasted free_zone_device_page())
are redundant and misleading to make a special point of clearing it (as
the "__" implies, it could only safely be used on the freeing path).
Delete __ClearPageWaiters(). Remark on this in one of the "possible"
comments in folio_wake_bit(), and delete the superfluous comments.
Link: https://lkml.kernel.org/r/3eafa969-5b1a-accf-88fe-318784c791a@google.com
Signed-off-by: Hugh Dickins <hughd@google.com>
Tested-by: Yu Zhao <yuzhao@google.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memremap.c')
| -rw-r--r-- | mm/memremap.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/memremap.c b/mm/memremap.c index c17eca4a48ca..af0223605e69 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -456,8 +456,6 @@ void free_zone_device_page(struct page *page) if (WARN_ON_ONCE(!page->pgmap->ops || !page->pgmap->ops->page_free)) return; - __ClearPageWaiters(page); - mem_cgroup_uncharge(page_folio(page)); /* |