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btrfs: Remove EXTENT_WRITEBACK 

This flag was introduced in a52d9a8033 ("Btrfs: Extent based page
cache code.") and subsequently it's usage effectively was removed by
1edbb734b4 ("Btrfs: reduce CPU usage in the extent_state tree") and
f2a97a9dbd ("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>
This commit is contained in:
Nikolay Borisov 2019-03-14 15:28:30 +02:00 committed by David Sterba
parent e8baf7abcf
commit 4e586ca3c3
3 changed files with 16 additions and 19 deletions
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3
fs/btrfs/extent_io.c
View File

@ -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);

31
fs/btrfs/extent_io.h
View File

@ -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)

1
include/trace/events/btrfs.h
View File

@ -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"}, \