On 31/07/17 11:58 AM, Andy Shevchenko wrote: > On Mon, Jul 31, 2017 at 7:31 PM, Logan Gunthorpe <logang@xxxxxxxxxxxx> wrote: >> On 31/07/17 10:10 AM, Andy Shevchenko wrote: >>> Some drivers (hardware) would like to have non-atomic MMIO accesses >>> when readq() defined >> >> Huh? But that's the whole point of the io64-nonatomic header. If a >> driver wants a specific non-atomic access they should just code two 32 >> bit accesses. > You mean to call them directly as lo_hi_XXX() or hi_lo_XXX() ? > Yes it would work. I suppose you could do that too but I really meant just using two io32 calls. That's the most explicit way to indicate you want a non-atomic access. Logan
