On Thu, Jul 28, 2005 at 12:57:51PM +0100, Ian Pratt wrote: > > > Greg> Hm, you do realize that io_remap_pfn_range() is the same > > > Greg> thing as remap_pfn_range() on i386, right? > > > > > > Greg> So, why would this patch change anything? > > > > > > It's not the same thing under Xen. I think this patch > > fixes userspace > > > access to PCI memory for XenLinux. > > > > But Xen is a separate arch, and hence, will get different pci > > arch specific functions, right? > > > > In short, what is this patch trying to fix? What is the > > problem anyone is seeing with the existing code? > > As I understand it, remap_pfn_range should be used for mapping pages > that are backed by memory, and io_remap_pfn_range should be used for > mapping MMIO regions. > There's a distinciton between the two for architectures like Sparc and > xen/x86.
I agree, but not for i386, which is what the patch was trying to change. If this is a fix for xen, fine, then say so in the changelog information for the patch, as it is, no such information was given. thanks, greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
