linux-kernel - [PATCH 2/6] btrfs: drop usage of folio

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Message-ID: <20250427185908.90450-3-ryncsn@gmail.com>
Date: Mon, 28 Apr 2025 02:59:04 +0800
From: Kairui Song <ryncsn@...il.com>
To: linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Wilcox <willy@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Chris Li <chrisl@...nel.org>,
	Yosry Ahmed <yosryahmed@...gle.com>,
	"Huang, Ying" <ying.huang@...ux.alibaba.com>,
	Nhat Pham <nphamcs@...il.com>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org,
	Kairui Song <kasong@...cent.com>,
	Chris Mason <clm@...com>,
	Josef Bacik <josef@...icpanda.com>,
	David Sterba <dsterba@...e.com>,
	linux-btrfs@...r.kernel.org
Subject: [PATCH 2/6] btrfs: drop usage of folio_index

From: Kairui Song <kasong@...cent.com>

folio_index is only needed for mixed usage of page cache and swap
cache, for pure page cache usage, the caller can just use
folio->index instead.

It can't be a swap cache folio here.  Swap mapping may only call into fs
through `swap_rw` and that is not supported for btrfs.  So just drop it
and use folio->index instead.

Signed-off-by: Kairui Song <kasong@...cent.com>
Cc: Chris Mason <clm@...com> (maintainer:BTRFS FILE SYSTEM)
Cc: Josef Bacik <josef@...icpanda.com> (maintainer:BTRFS FILE SYSTEM)
Cc: David Sterba <dsterba@...e.com> (maintainer:BTRFS FILE SYSTEM)
Cc: linux-btrfs@...r.kernel.org (open list:BTRFS FILE SYSTEM)
Signed-off-by: Kairui Song <kasong@...cent.com>
---
 fs/btrfs/extent_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 197f5e51c474..e08b50504d13 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3509,7 +3509,7 @@ static void btree_clear_folio_dirty_tag(struct folio *folio)
 	xa_lock_irq(&folio->mapping->i_pages);
 	if (!folio_test_dirty(folio))
 		__xa_clear_mark(&folio->mapping->i_pages,
-				folio_index(folio), PAGECACHE_TAG_DIRTY);
+				folio->index, PAGECACHE_TAG_DIRTY);
 	xa_unlock_irq(&folio->mapping->i_pages);
 }
 
-- 
2.49.0