[PATCH v6 26/27] mm/filemap: Convert wake_up_page_bit to wake_up_folio_bit

Matthew Wilcox (Oracle)
2021-03-31T18:57:15Z

All callers have a folio, so use it directly.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
mm/filemap.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 76e1c4be1205..51b2091d402c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1121,14 +1121,14 @@ static int wake_page_function(wait_queue_entry_t *wait, unsigned mode, int sync,
return (flags & WQ_FLAG_EXCLUSIVE) != 0;
}

-static void wake_up_page_bit(struct page *page, int bit_nr)
+static void wake_up_folio_bit(struct folio *folio, int bit_nr)
{
- wait_queue_head_t *q = page_waitqueue(page);
+ wait_queue_head_t *q = page_waitqueue(&folio->page);
struct wait_page_key key;
unsigned long flags;
wait_queue_entry_t bookmark;

- key.page = page;
+ key.page = &folio->page;
key.bit_nr = bit_nr;
key.page_match = 0;

@@ -1163,7 +1163,7 @@ static void wake_up_page_bit(struct page *page, int bit_nr)
* page waiters.
*/
if (!waitqueue_active(q) || !key.page_match) {
- ClearPageWaiters(page);
+ ClearFolioWaiters(folio);
/*
* It's possible to miss clearing Waiters here, when we woke
* our page waiters, but the hashed waitqueue has waiters for
@@ -1179,7 +1179,7 @@ static void wake_up_folio(struct folio *folio, int bit)
{
if (!FolioWaiters(folio))
return;
- wake_up_page_bit(&folio->page, bit);
+ wake_up_folio_bit(folio, bit);
}

/*
@@ -1444,7 +1444,7 @@ void unlock_folio(struct folio *folio)
BUILD_BUG_ON(PG_waiters != 7);
VM_BUG_ON_FOLIO(!FolioLocked(folio), folio);
if (clear_bit_unlock_is_negative_byte(PG_locked, folio_flags(folio, 0)))
- wake_up_page_bit(&folio->page, PG_locked);
+ wake_up_folio_bit(folio, PG_locked);
}
EXPORT_SYMBOL(unlock_folio);

@@ -1461,10 +1461,10 @@ EXPORT_SYMBOL(unlock_folio);
*/
void unlock_page_private_2(struct page *page)
{
- page = compound_head(page);
- VM_BUG_ON_PAGE(!PagePrivate2(page), page);
- clear_bit_unlock(PG_private_2, &page->flags);
- wake_up_page_bit(page, PG_private_2);
+ struct folio *folio = page_folio(page);
+ VM_BUG_ON_FOLIO(!FolioPrivate2(folio), folio);
+ clear_bit_unlock(PG_private_2, folio_flags(folio, 0));
+ wake_up_folio_bit(folio, PG_private_2);
}
EXPORT_SYMBOL(unlock_page_private_2);

--
2.30.2