We always either ask for a block device or DAX device mapping, so we can use the same space for both.
Signed-off-by: Christoph Hellwig <[email protected]> --- fs/ext2/inode.c | 6 ++++-- fs/ext4/inode.c | 6 ++++-- fs/xfs/xfs_iomap.c | 6 ++++-- include/linux/iomap.h | 6 ++++-- 4 files changed, 16 insertions(+), 8 deletions(-) diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 71635909df3b..8aead4e9dbc1 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -815,9 +815,11 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length, return ret; iomap->flags = 0; - iomap->bdev = inode->i_sb->s_bdev; iomap->offset = (u64)first_block << blkbits; - iomap->dax_dev = sbi->s_daxdev; + if (IS_DAX(inode)) + iomap->dax_dev = sbi->s_daxdev; + else + iomap->bdev = inode->i_sb->s_bdev; if (ret == 0) { iomap->type = IOMAP_HOLE; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2ea07efbe016..79027e99118f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3524,8 +3524,10 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length, iomap->flags = 0; if (ext4_inode_datasync_dirty(inode)) iomap->flags |= IOMAP_F_DIRTY; - iomap->bdev = inode->i_sb->s_bdev; - iomap->dax_dev = sbi->s_daxdev; + if (IS_DAX(inode)) + iomap->dax_dev = sbi->s_daxdev; + else + iomap->bdev = inode->i_sb->s_bdev; iomap->offset = (u64)first_block << blkbits; iomap->length = (u64)map.m_len << blkbits; diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index c6ce6f9335b6..587110db1ad2 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -70,8 +70,10 @@ xfs_bmbt_to_iomap( } iomap->offset = XFS_FSB_TO_B(mp, imap->br_startoff); iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount); - iomap->bdev = xfs_find_bdev_for_inode(VFS_I(ip)); - iomap->dax_dev = xfs_find_daxdev_for_inode(VFS_I(ip)); + if (IS_DAX(VFS_I(ip))) + iomap->bdev = xfs_find_bdev_for_inode(VFS_I(ip)); + else + iomap->dax_dev = xfs_find_daxdev_for_inode(VFS_I(ip)); } xfs_extlen_t diff --git a/include/linux/iomap.h b/include/linux/iomap.h index a044a824da85..212f4d59bcbf 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -53,8 +53,10 @@ struct iomap { u64 length; /* length of mapping, bytes */ u16 type; /* type of mapping */ u16 flags; /* flags for mapping */ - struct block_device *bdev; /* block device for I/O */ - struct dax_device *dax_dev; /* dax_dev for dax operations */ + union { + struct block_device *bdev; + struct dax_device *dax_dev; + }; }; /* -- 2.14.2
