From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Kent Overstreet <kent.overstreet@gmail.com>,
Christoph Hellwig <hch@lst.de>
Subject: [PATCH v5 07/18] mm/filemap: Inline __wait_on_page_locked_async into caller
Date: Fri, 22 Jan 2021 16:01:29 +0000 [thread overview]
Message-ID: <20210122160140.223228-8-willy@infradead.org> (raw)
In-Reply-To: <20210122160140.223228-1-willy@infradead.org>
The previous patch removed wait_on_page_locked_async(), so inline
__wait_on_page_locked_async into __lock_page_async().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Kent Overstreet <kent.overstreet@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
mm/filemap.c | 53 ++++++++++++++++++++++------------------------------
1 file changed, 22 insertions(+), 31 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 88201506ad3ef..abd596931f699 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1338,36 +1338,6 @@ int wait_on_page_bit_killable(struct page *page, int bit_nr)
}
EXPORT_SYMBOL(wait_on_page_bit_killable);
-static int __wait_on_page_locked_async(struct page *page,
- struct wait_page_queue *wait, bool set)
-{
- struct wait_queue_head *q = page_waitqueue(page);
- int ret = 0;
-
- wait->page = page;
- wait->bit_nr = PG_locked;
-
- spin_lock_irq(&q->lock);
- __add_wait_queue_entry_tail(q, &wait->wait);
- SetPageWaiters(page);
- if (set)
- ret = !trylock_page(page);
- else
- ret = PageLocked(page);
- /*
- * If we were successful now, we know we're still on the
- * waitqueue as we're still under the lock. This means it's
- * safe to remove and return success, we know the callback
- * isn't going to trigger.
- */
- if (!ret)
- __remove_wait_queue(q, &wait->wait);
- else
- ret = -EIOCBQUEUED;
- spin_unlock_irq(&q->lock);
- return ret;
-}
-
/**
* put_and_wait_on_page_locked - Drop a reference and wait for it to be unlocked
* @page: The page to wait for.
@@ -1543,7 +1513,28 @@ EXPORT_SYMBOL_GPL(__lock_page_killable);
int __lock_page_async(struct page *page, struct wait_page_queue *wait)
{
- return __wait_on_page_locked_async(page, wait, true);
+ struct wait_queue_head *q = page_waitqueue(page);
+ int ret = 0;
+
+ wait->page = 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);
+ /*
+ * If we were successful now, we know we're still on the
+ * waitqueue as we're still under the lock. This means it's
+ * safe to remove and return success, we know the callback
+ * isn't going to trigger.
+ */
+ if (!ret)
+ __remove_wait_queue(q, &wait->wait);
+ else
+ ret = -EIOCBQUEUED;
+ spin_unlock_irq(&q->lock);
+ return ret;
}
/*
--
2.29.2
next prev parent reply other threads:[~2021-01-22 16:09 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 16:01 [PATCH v5 00/18] Refactor generic_file_buffered_read Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 01/18] mm/filemap: Rename generic_file_buffered_read subfunctions Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 02/18] mm/filemap: Remove dynamically allocated array from filemap_read Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 03/18] mm/filemap: Convert filemap_get_pages to take a pagevec Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 04/18] mm/filemap: Use head pages in generic_file_buffered_read Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 05/18] mm/filemap: Pass a sleep state to put_and_wait_on_page_locked Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 06/18] mm/filemap: Support readpage splitting a page Matthew Wilcox (Oracle)
2021-01-22 16:01 ` Matthew Wilcox (Oracle) [this message]
2021-01-22 16:01 ` [PATCH v5 08/18] mm/filemap: Don't call ->readpage if IOCB_WAITQ is set Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 09/18] mm/filemap: Change filemap_read_page calling conventions Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 10/18] mm/filemap: Change filemap_create_page " Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 11/18] mm/filemap: Convert filemap_update_page to return an errno Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 12/18] mm/filemap: Move the iocb checks into filemap_update_page Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 13/18] mm/filemap: Add filemap_range_uptodate Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 14/18] mm/filemap: Split filemap_readahead out of filemap_get_pages Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 15/18] mm/filemap: Restructure filemap_get_pages Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 16/18] mm/filemap: Don't relock the page after calling readpage Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 17/18] mm/filemap: Rename generic_file_buffered_read to filemap_read Matthew Wilcox (Oracle)
2021-01-22 16:01 ` [PATCH v5 18/18] mm/filemap: Simplify generic_file_read_iter Matthew Wilcox (Oracle)
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