On Fri, Mar 20, 2015 at 4:17 PM, Luis R. Rodriguez <[email protected]> wrote: > From: "Luis R. Rodriguez" <[email protected]> > > This lets drivers take advanate of PAT when available. This > should help with the transition of converting video drivers over > to ioremap_wc() to help with the goal of eventually using > _PAGE_CACHE_UC over _PAGE_CACHE_UC_MINUS on x86 on > ioremap_nocache() (de33c442e) > > Cc: Suresh Siddha <[email protected]> > Cc: Venkatesh Pallipadi <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Juergen Gross <[email protected]> > Cc: Daniel Vetter <[email protected]> > Cc: Andy Lutomirski <[email protected]> > Cc: Dave Airlie <[email protected]> > Cc: Antonino Daplas <[email protected]> > Cc: Jean-Christophe Plagniol-Villard <[email protected]> > Cc: Tomi Valkeinen <[email protected]> > Cc: [email protected] > Cc: [email protected] > Signed-off-by: Luis R. Rodriguez <[email protected]> > --- > drivers/pci/pci.c | 14 ++++++++++++++ > include/linux/pci.h | 1 + > 2 files changed, 15 insertions(+) > > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c > index 81f06e8..6afd507 100644 > --- a/drivers/pci/pci.c > +++ b/drivers/pci/pci.c > @@ -137,6 +137,20 @@ void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int > bar) > pci_resource_len(pdev, bar)); > } > EXPORT_SYMBOL_GPL(pci_ioremap_bar); > + > +void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar) > +{ > + /* > + * Make sure the BAR is actually a memory resource, not an IO resource > + */ > + if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) { > + WARN_ON(1); > + return NULL; > + }
if (WARN_ON(...))? --Andy -- 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/
