[PATCH 5/9] btrfs: swtich EXTENT_BUFFER_* to enums

From: David Sterba <dsterba@suse.com>
To: linux-btrfs@vger.kernel.org
Cc: David Sterba <dsterba@suse.com>
Subject: [PATCH 5/9] btrfs: swtich EXTENT_BUFFER_* to enums
Date: Tue, 27 Nov 2018 20:53:50 +0100	[thread overview]
Message-ID: <132de3b38834a3703cc9cebe56e7de8dcbcec1c9.1543348078.git.dsterba@suse.com> (raw)
In-Reply-To: <cover.1543348078.git.dsterba@suse.com>

We can use simple enum for values that are not part of on-disk format:
extent buffer flags;

Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/extent_io.h | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index a1d3ea5a0d32..fd42492e62e5 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -37,18 +37,22 @@
 #define EXTENT_BIO_COMPRESSED 1
 #define EXTENT_BIO_FLAG_SHIFT 16
 
-/* these are bit numbers for test/set bit */
-#define EXTENT_BUFFER_UPTODATE 0
-#define EXTENT_BUFFER_DIRTY 2
-#define EXTENT_BUFFER_CORRUPT 3
-#define EXTENT_BUFFER_READAHEAD 4	/* this got triggered by readahead */
-#define EXTENT_BUFFER_TREE_REF 5
-#define EXTENT_BUFFER_STALE 6
-#define EXTENT_BUFFER_WRITEBACK 7
-#define EXTENT_BUFFER_READ_ERR 8        /* read IO error */
-#define EXTENT_BUFFER_UNMAPPED 9
-#define EXTENT_BUFFER_IN_TREE 10
-#define EXTENT_BUFFER_WRITE_ERR 11    /* write IO error */
+enum {
+	EXTENT_BUFFER_UPTODATE,
+	EXTENT_BUFFER_DIRTY,
+	EXTENT_BUFFER_CORRUPT,
+	/* this got triggered by readahead */
+	EXTENT_BUFFER_READAHEAD,
+	EXTENT_BUFFER_TREE_REF,
+	EXTENT_BUFFER_STALE,
+	EXTENT_BUFFER_WRITEBACK,
+	/* read IO error */
+	EXTENT_BUFFER_READ_ERR,
+	EXTENT_BUFFER_UNMAPPED,
+	EXTENT_BUFFER_IN_TREE,
+	/* write IO error */
+	EXTENT_BUFFER_WRITE_ERR,
+};
 
 /* these are flags for __process_pages_contig */
 #define PAGE_UNLOCK		(1 << 0)
-- 
2.19.1

