On Tue, 2009-09-22 at 11:29 +0200, Weirich, Bernhard wrote: > Hello, > > I found the cause of the problem. > My architecture does not define the _PAGE_SPECIAL macro, thus in pte-common.h > line 32, it is defined as 0 > And then in line 180, since _PAGE_SPECIAL is defined, the macro > __HAVE_ARCH_PTE_SPECIAL is erroneously defined. > This makes any ppc architecture to act as if it has a pte special bit! > I suggest the following simple patch to fix this.
Thank ! That looks indeed like a bug. Note that with 2.6.32, we should be able to use 0x20 as _PAGE_SPECIAL on 40x which would improve performances in some areas. Cheers, Ben. > Bernhard WEIRICH > Software Development > > > Signed-off-by: Bernhard Weirich <bernhard.weir...@riedel.net> > --- linux/arch/powerpc/include/asm/pte-common.h 2009-09-16 > 11:23:44.000000000 +0200 > +++ linux/arch/powerpc/include/asm/pte-common.h 2009-09-22 > 11:13:08.000000000 +0200 > @@ -176,7 +176,7 @@ > #define HAVE_PAGE_AGP > > /* Advertise support for _PAGE_SPECIAL */ > -#ifdef _PAGE_SPECIAL > +#if _PAGE_SPECIAL != 0 > #define __HAVE_ARCH_PTE_SPECIAL > #endif > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev