linux-kernel - [PATCH] btrfs: remove EXTENT_BUFFER_IN

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Message-ID: <20250318095440.436685-1-neelx@suse.com>
Date: Tue, 18 Mar 2025 10:54:38 +0100
From: Daniel Vacek <neelx@...e.com>
To: Chris Mason <clm@...com>,
	Josef Bacik <josef@...icpanda.com>,
	David Sterba <dsterba@...e.com>
Cc: Daniel Vacek <neelx@...e.com>,
	linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] btrfs: remove EXTENT_BUFFER_IN_TREE flag

This flag is set after inserting the eb to the buffer tree and cleared on
it's removal. But it does not bring any added value. Just kill it for good.

Signed-off-by: Daniel Vacek <neelx@...e.com>
---
 fs/btrfs/extent_io.c | 18 ++++++------------
 fs/btrfs/extent_io.h |  1 -
 2 files changed, 6 insertions(+), 13 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index b168dc354f20b..864bdffaa1123 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3048,7 +3048,6 @@ struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
 			goto again;
 	}
 	check_buffer_tree_ref(eb);
-	set_bit(EXTENT_BUFFER_IN_TREE, &eb->bflags);
 
 	return eb;
 free_eb:
@@ -3368,7 +3367,6 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
 	}
 	/* add one reference for the tree */
 	check_buffer_tree_ref(eb);
-	set_bit(EXTENT_BUFFER_IN_TREE, &eb->bflags);
 
 	/*
 	 * Now it's safe to unlock the pages because any calls to
@@ -3432,18 +3430,14 @@ static int release_extent_buffer(struct extent_buffer *eb)
 
 	WARN_ON(atomic_read(&eb->refs) == 0);
 	if (atomic_dec_and_test(&eb->refs)) {
-		if (test_and_clear_bit(EXTENT_BUFFER_IN_TREE, &eb->bflags)) {
-			struct btrfs_fs_info *fs_info = eb->fs_info;
+		struct btrfs_fs_info *fs_info = eb->fs_info;
 
-			spin_unlock(&eb->refs_lock);
+		spin_unlock(&eb->refs_lock);
 
-			spin_lock(&fs_info->buffer_lock);
-			radix_tree_delete(&fs_info->buffer_radix,
-					  eb->start >> fs_info->sectorsize_bits);
-			spin_unlock(&fs_info->buffer_lock);
-		} else {
-			spin_unlock(&eb->refs_lock);
-		}
+		spin_lock(&fs_info->buffer_lock);
+		radix_tree_delete_item(&fs_info->buffer_radix,
+				       eb->start >> fs_info->sectorsize_bits, eb);
+		spin_unlock(&fs_info->buffer_lock);
 
 		btrfs_leak_debug_del_eb(eb);
 		/* Should be safe to release folios at this point. */
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 2e261892c7bc7..9cfb1e8f9b42d 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -47,7 +47,6 @@ enum {
 	/* read IO error */
 	EXTENT_BUFFER_READ_ERR,
 	EXTENT_BUFFER_UNMAPPED,
-	EXTENT_BUFFER_IN_TREE,
 	/* write IO error */
 	EXTENT_BUFFER_WRITE_ERR,
 	/* Indicate the extent buffer is written zeroed out (for zoned) */
-- 
2.47.2