[PATCH 17/34] btrfs: remove the is_metadata flag in struct btrfs_bio

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This flag is unused now, so remove it.  Re-expand the mirror_num field
to 8 bits, and move it to the I/O completion internal section of the
structure.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/btrfs/bio.h     | 11 +----------
 fs/btrfs/disk-io.c |  1 -
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/fs/btrfs/bio.h b/fs/btrfs/bio.h
index c232148348dfe3..a96bcb3f36f684 100644
--- a/fs/btrfs/bio.h
+++ b/fs/btrfs/bio.h
@@ -30,16 +30,6 @@ typedef void (*btrfs_bio_end_io_t)(struct btrfs_bio *bbio);
  * passed to btrfs_submit_bio for mapping to the physical devices.
  */
 struct btrfs_bio {
-	unsigned int mirror_num:7;
-
-	/*
-	 * Extra indicator for metadata bios.
-	 * For some btrfs bios they use pages without a mapping, thus
-	 * we can not rely on page->mapping->host to determine if
-	 * it's a metadata bio.
-	 */
-	unsigned int is_metadata:1;
-
 	/* Inode and offset into it that this I/O operates on. */
 	struct btrfs_inode *inode;
 	u64 file_offset;
@@ -64,6 +54,7 @@ struct btrfs_bio {
 	void *private;
 
 	/* For internal use in read end I/O handling */
+	unsigned int mirror_num;
 	struct work_struct end_io_work;
 
 	/*
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index a6f89ac1c0865c..5a8ca6a518cf62 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -846,7 +846,6 @@ void btrfs_submit_metadata_bio(struct btrfs_inode *inode, struct bio *bio, int m
 	blk_status_t ret;
 
 	bio->bi_opf |= REQ_META;
-	bbio->is_metadata = 1;
 
 	if (btrfs_op(bio) != BTRFS_MAP_WRITE) {
 		btrfs_submit_bio(fs_info, bio, mirror_num);
-- 
2.39.0




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