On Thu, Jan 24, 2019 at 05:23:59PM +0800, Herbert Xu wrote: > On Thu, Jan 24, 2019 at 09:50:35AM +0100, Ard Biesheuvel wrote: > > > > Thanks for yet another round of cleanup > > > > I'll look into these, but I'd like to clarify one thing first. > > > > IIUC, you are trying to deal with the case where a single scatterlist > > element describes a range that strides two pages, and I wonder if that > > is a valid use of scatterlists in the first place. > > > > Herbert? > > Yes it is valid. IIRC the network stack may generate such a > scatterlist. > Also it can easily happen with kmalloced buffers, e.g. buf = kmalloc(10000, GFP_KERNEL); [...] sg_init_one(&sg, buf, 10000); - Eric
