Re: [PATCH DRAFT RFC 34/34] buffer: port block device access to files and get rid of bd_inode access

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On Wed, Jan 17, 2024 at 05:15:00PM +0100, Jan Kara wrote:
> > >  	iomap->bdev = bdev;
> > > +	BUG_ON(true /* TODO(brauner): This is the only place where we don't go from inode->i_sb->s_f_bdev for obvious reasons. Thoughts? */);
> > 
> > Maybe block devices should have their own struct file created when the
> > block device is instantiated and torn down when the block device is
> > trashed?
> 
> OK, but is there a problem with I_BDEV() which is currently used in
> blkdev_iomap_begin()?

Well, blkdev_iomap_begin is always called on the the actual bdev fs
inode that is allocated together with the bdev itself.  So we'll always
be able to get to it using container_of variants.





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