Ok I understood. after I call request_mem_region , can real device write some byte to this region? or dont touch? I read mem region of device configuration space, start and length register
thanks 2011/6/21 Mulyadi Santosa <[email protected]> > On 20/06/2011, Daniel Redway <[email protected]> wrote: > > Hello > > > > As I understand ioremap() maps and returns virtual address > > for a given physical(bus) address associated with my PCI card. > > That is cool and clear. > > > > > > What is the purpose of request_mem_region()? > > checking http://lxr.linux.no/linux+v2.6.39/kernel/resource.c#L732, I > think that function generally says "alright,I wanna reserve this > memory region, so no one may touch it....until I mark it as free > again" > > -- > regards, > > Mulyadi Santosa > Freelance Linux trainer and consultant > > blog: the-hydra.blogspot.com > training: mulyaditraining.blogspot.com >
_______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
