[dm-devel] [PATCH] bio: have bio_kmap_irq return the size of mapped data (fwd)

[Christoph Hellwig]

On Tue, Nov 07, 2017 at 04:45:17PM -0500, Mikulas Patocka wrote:
> Hi
> 
> I need the function bio_kmap_irq in the driver that I am developing, but 
> it doesn't return the size of the mapped data. I've made this patch to fix 
> it.

To be honest I think we should just remove bio_kmap_irq.  It is currently
unused and assumes there is only a single bvec to map.

I think you're much better off using a proper bvec iterator in your
caller and then call bvec_kmap_irq/bvec_kunmap_irq manually.