Re: [RFC v4 linux-next 19/19] fs & block: remove bdev->bd_inode

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On Thu, Mar 21, 2024 at 08:15:06PM +0800, Yu Kuai wrote:

> > blkdev_iomap_begin() etc. may be an arbitrary filesystem block device
> > inode. But why can't you use I_BDEV(inode->i_mapping->host) to get to the
> > block device instead of your file_bdev(inode->i_private)? I don't see any
> > advantage in stashing away that special bdev_file into inode->i_private but
> > perhaps I'm missing something...
> > 
> 
> Because we're goning to remove the 'block_device' from iomap and
> buffer_head, and replace it with a 'bdev_file'.

What of that?  file_inode(file)->f_mapping->host will give you bdevfs inode
just fine...




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