btrfs: Remove EXTENT_WRITEBACK

This flag was introduced in a52d9a8033c4 ("Btrfs: Extent based page
cache code.") and subsequently it's usage effectively was removed by
1edbb734b4e0 ("Btrfs: reduce CPU usage in the extent_state tree") and
f2a97a9dbd86 ("btrfs: remove all unused functions"). Just remove it,
no functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index ee246a7..5725adf 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4229,8 +4229,7 @@ int try_release_extent_mapping(struct page *page, gfp_t mask)
                        }
                        if (!test_range_bit(tree, em->start,
                                            extent_map_end(em) - 1,
-                                           EXTENT_LOCKED | EXTENT_WRITEBACK,
-                                           0, NULL)) {
+                                           EXTENT_LOCKED, 0, NULL)) {
                                set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
                                        &btrfs_inode->runtime_flags);
                                remove_extent_mapping(map, em);

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index aef7a46..a1dc61b 100644 (file)
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -9,22 +9,21 @@
 
 /* bits for the extent state */
 #define EXTENT_DIRTY           (1U << 0)
-#define EXTENT_WRITEBACK       (1U << 1)
-#define EXTENT_UPTODATE                (1U << 2)
-#define EXTENT_LOCKED          (1U << 3)
-#define EXTENT_NEW             (1U << 4)
-#define EXTENT_DELALLOC                (1U << 5)
-#define EXTENT_DEFRAG          (1U << 6)
-#define EXTENT_BOUNDARY                (1U << 9)
-#define EXTENT_NODATASUM       (1U << 10)
-#define EXTENT_CLEAR_META_RESV (1U << 11)
-#define EXTENT_NEED_WAIT       (1U << 12)
-#define EXTENT_DAMAGED         (1U << 13)
-#define EXTENT_NORESERVE       (1U << 14)
-#define EXTENT_QGROUP_RESERVED (1U << 15)
-#define EXTENT_CLEAR_DATA_RESV (1U << 16)
-#define EXTENT_DELALLOC_NEW    (1U << 17)
-#define EXTENT_IOBITS          (EXTENT_LOCKED | EXTENT_WRITEBACK)
+#define EXTENT_UPTODATE                (1U << 1)
+#define EXTENT_LOCKED          (1U << 2)
+#define EXTENT_NEW             (1U << 3)
+#define EXTENT_DELALLOC                (1U << 4)
+#define EXTENT_DEFRAG          (1U << 5)
+#define EXTENT_BOUNDARY                (1U << 6)
+#define EXTENT_NODATASUM       (1U << 7)
+#define EXTENT_CLEAR_META_RESV (1U << 8)
+#define EXTENT_NEED_WAIT       (1U << 9)
+#define EXTENT_DAMAGED         (1U << 10)
+#define EXTENT_NORESERVE       (1U << 11)
+#define EXTENT_QGROUP_RESERVED (1U << 12)
+#define EXTENT_CLEAR_DATA_RESV (1U << 13)
+#define EXTENT_DELALLOC_NEW    (1U << 14)
+#define EXTENT_IOBITS          (EXTENT_LOCKED)
 #define EXTENT_DO_ACCOUNTING    (EXTENT_CLEAR_META_RESV | \
                                 EXTENT_CLEAR_DATA_RESV)
 #define EXTENT_CTLBITS         (EXTENT_DO_ACCOUNTING)

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 74a11b2..8b12753 100644 (file)
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -102,7 +102,6 @@ TRACE_DEFINE_ENUM(COMMIT_TRANS);
 
 #define EXTENT_FLAGS                                           \
        { EXTENT_DIRTY,                 "DIRTY"},               \
-       { EXTENT_WRITEBACK,             "WRITEBACK"},           \
        { EXTENT_UPTODATE,              "UPTODATE"},            \
        { EXTENT_LOCKED,                "LOCKED"},              \
        { EXTENT_NEW,                   "NEW"},                 \