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.