When the caller already has a folio, this saves a call to compound_head().
If not, the call to compound_head() is merely moved.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
fs/io_uring.c | 2 +-
include/linux/pagemap.h | 14 +++++++-------
mm/filemap.c | 12 ++++++------
3 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 03748faa5295..2627160ffd4c 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3398,7 +3398,7 @@ static int io_read_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
}
/*
- * This is our waitqueue callback handler, registered through lock_page_async()
+ * This is our waitqueue callback handler, registered through lock_folio_async()
* when we initially tried to do the IO with the iocb armed our waitqueue.
* This gets called when the page is unlocked, and we generally expect that to
* happen when the page IO is completed and the page is now uptodate. This will
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 93a4ab9feaa8..131d1aa2af61 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -620,7 +620,7 @@ static inline bool wake_page_match(struct wait_page_queue *wait_page,
void __lock_folio(struct folio *folio);
int __lock_folio_killable(struct folio *folio);
-extern int __lock_page_async(struct page *page, struct wait_page_queue *wait);
+int __lock_folio_async(struct folio *folio, struct wait_page_queue *wait);
extern int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
unsigned int flags);
void unlock_folio(struct folio *folio);
@@ -687,18 +687,18 @@ static inline int lock_page_killable(struct page *page)
}
/*
- * lock_page_async - Lock the page, unless this would block. If the page
- * is already locked, then queue a callback when the page becomes unlocked.
+ * lock_folio_async - Lock the folio, unless this would block. If the folio
+ * is already locked, then queue a callback when the folio becomes unlocked.
* This callback can then retry the operation.
*
- * Returns 0 if the page is locked successfully, or -EIOCBQUEUED if the page
+ * Returns 0 if the folio is locked successfully, or -EIOCBQUEUED if the folio
* was already locked and the callback defined in 'wait' was queued.
*/
-static inline int lock_page_async(struct page *page,
+static inline int lock_folio_async(struct folio *folio,
struct wait_page_queue *wait)
{
- if (!trylock_page(page))
- return __lock_page_async(page, wait);
+ if (!trylock_folio(folio))
+ return __lock_folio_async(folio, wait);
return 0;
}
diff --git a/mm/filemap.c b/mm/filemap.c
index c378b28c2bdc..a54eb4641385 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1524,18 +1524,18 @@ int __lock_folio_killable(struct folio *folio)
}
EXPORT_SYMBOL_GPL(__lock_folio_killable);
-int __lock_page_async(struct page *page, struct wait_page_queue *wait)
+int __lock_folio_async(struct folio *folio, struct wait_page_queue *wait)
{
- struct wait_queue_head *q = page_waitqueue(page);
+ struct wait_queue_head *q = page_waitqueue(&folio->page);
int ret = 0;
- wait->page = page;
+ wait->page = &folio->page;
wait->bit_nr = PG_locked;
spin_lock_irq(&q->lock);
__add_wait_queue_entry_tail(q, &wait->wait);
- SetPageWaiters(page);
- ret = !trylock_page(page);
+ SetFolioWaiters(folio);
+ ret = !trylock_folio(folio);
/*
* If we were successful now, we know we're still on the
* waitqueue as we're still under the lock. This means it's
@@ -2293,7 +2293,7 @@ static int filemap_update_page(struct kiocb *iocb,
put_and_wait_on_page_locked(page, TASK_KILLABLE);
return AOP_TRUNCATED_PAGE;
}
- error = __lock_page_async(page, iocb->ki_waitq);
+ error = __lock_folio_async(page_folio(page), iocb->ki_waitq);
if (error)
return error;
}
--
2.29.2
