On Fri, Jun 29, 2012 at 10:16:12AM -0400, Rik van Riel wrote: > On 06/28/2012 08:55 AM, Andrea Arcangeli wrote: > > Xen has taken over the last reserved bit available for the pagetables > > which is set through ioremap, this documents it and makes the code > > more readable. > > > > Signed-off-by: Andrea Arcangeli<aarcange@xxxxxxxxxx> > > --- > > arch/x86/include/asm/pgtable_types.h | 11 +++++++++-- > > 1 files changed, 9 insertions(+), 2 deletions(-) > > > > diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h > > index 013286a..b74cac9 100644 > > --- a/arch/x86/include/asm/pgtable_types.h > > +++ b/arch/x86/include/asm/pgtable_types.h > > @@ -17,7 +17,7 @@ > > #define _PAGE_BIT_PAT 7 /* on 4KB pages */ > > #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ > > #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ > > -#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */ > > +#define _PAGE_BIT_UNUSED2 10 > > Considering that Xen is using it, it is not really > unused, is it? _PAGE_BIT_UNUSED1 is used too (_PAGE_BIT_SPECIAL). Unused stands for unused by the CPU, not by the OS. But this patch is dropped. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>