From: Dave Kleikamp Date: Mon, 7 Jul 2008 14:28:55 +0000 (+1000) Subject: powerpc/mm: Don't clear _PAGE_COHERENT when _PAGE_SAO is set X-Git-Tag: v2.6.27-rc1~1058^2~38 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=801eb73f45371accc78ca9d6d22d647eeb722c11;p=linux-2.6 powerpc/mm: Don't clear _PAGE_COHERENT when _PAGE_SAO is set The current low level hash code on LPAR configurations clears _PAGE_COHERENT (M) when either _PAGE_GUARDED (G) or _PAGE_NO_CACHE (I) is set. This conflicts with _PAGE_SAO which has M, I and W bits sets at once (normally invalid combo) to indicate the new SAO attribute. This changes the code to allow that case. Signed-off-by: Dave Kleikamp Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 3b4651b6ee..38b5927b36 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -305,7 +305,8 @@ static long pSeries_lpar_hpte_insert(unsigned long hpte_group, flags = 0; /* Make pHyp happy */ - if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE)) + if ((rflags & _PAGE_GUARDED) || + ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU))) hpte_r &= ~_PAGE_COHERENT; lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);