On Wed, Jan 17, 2024 at 05:32:54PM +0100, Jan Kara wrote:
> > @@ -68,6 +69,7 @@ struct buffer_head {
> > size_t b_size; /* size of mapping */
> > char *b_data; /* pointer to data within the page */
> >
> > + struct file *f_b_bdev;
> > struct block_device *b_bdev;
> > bh_end_io_t *b_end_io; /* I/O completion */
> > void *b_private; /* reserved for b_end_io */
>
> It is kind of annoying to have bdev duplicated in every buffer_head.
> Perhaps we can get rid of b_bdev?
Yes, that's ultimately the goal similar for struct super_block, I think
and struct iomap. But please see:
https://lore.kernel.org/r/20240118-gemustert-aalen-ee71d0c69826@brauner
as I'm still not yet clear on some details there.
