ext4: remove buffer_uninit handling
There isn't any need for setting BH_Uninit on buffers anymore. It was
only used to signal we need to mark io_end as needing extent
conversion in add_bh_to_extent() but now we can mark the io_end
directly when mapping extent.
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 90a164f..0a9b729 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2653,20 +2653,17 @@
extern int ext4_mmp_csum_verify(struct super_block *sb,
struct mmp_struct *mmp);
-/* BH_Uninit flag: blocks are allocated but uninitialized on disk */
+/*
+ * Note that these flags will never ever appear in a buffer_head's state flag.
+ * See EXT4_MAP_... to see where this is used.
+ */
enum ext4_state_bits {
BH_Uninit /* blocks are allocated but uninitialized on disk */
- = BH_JBDPrivateStart,
+ = BH_JBDPrivateStart,
BH_AllocFromCluster, /* allocated blocks were part of already
- * allocated cluster. Note that this flag will
- * never, ever appear in a buffer_head's state
- * flag. See EXT4_MAP_FROM_CLUSTER to see where
- * this is used. */
+ * allocated cluster. */
};
-BUFFER_FNS(Uninit, uninit)
-TAS_BUFFER_FNS(Uninit, uninit)
-
/*
* Add new method to test whether block and inode bitmaps are properly
* initialized. With uninit_bg reading the block from disk is not enough
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 5939a47..736d164 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2047,8 +2047,6 @@
clear_buffer_delay(bh);
bh->b_blocknr = pblock++;
}
- if (mpd->map.m_flags & EXT4_MAP_UNINIT)
- set_buffer_uninit(bh);
clear_buffer_unwritten(bh);
} while (++lblk < blocks &&
(bh = bh->b_this_page) != head);
@@ -2110,6 +2108,8 @@
err = ext4_map_blocks(handle, inode, map, get_blocks_flags);
if (err < 0)
return err;
+ if (map->m_flags & EXT4_MAP_UNINIT)
+ ext4_set_io_unwritten_flag(inode, mpd->io_submit.io_end);
BUG_ON(map->m_len == 0);
if (map->m_flags & EXT4_MAP_NEW) {
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 3e58546..de6860c 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -369,7 +369,6 @@
struct inode *inode,
struct buffer_head *bh)
{
- ext4_io_end_t *io_end;
int ret;
if (io->io_bio && bh->b_blocknr != io->io_next_block) {
@@ -384,9 +383,6 @@
ret = bio_add_page(io->io_bio, bh->b_page, bh->b_size, bh_offset(bh));
if (ret != bh->b_size)
goto submit_and_retry;
- io_end = io->io_end;
- if (test_clear_buffer_uninit(bh))
- ext4_set_io_unwritten_flag(inode, io_end);
io->io_next_block++;
return 0;
}