powerpc/mm: Add MMU_FTR_KERNEL_RO to possible feature mask

BugLink: http://bugs.launchpad.net/bugs/1672544
commit a5ecdad4847897007399d7a14c9109b65ce4c9b7 upstream.

Without this we will always find the feature disabled.

Fixes: 984d7a1ec6 ("powerpc/mm: Fixup kernel read only mapping")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 233a7e8cc8e32d6cf0ac904b3f02b2f340e3883b..065e762fae85c7c73fa71cc4f0834827935a40eb 100644 (file)
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -136,6 +136,7 @@ enum {
                MMU_FTR_NO_SLBIE_B | MMU_FTR_16M_PAGE | MMU_FTR_TLBIEL |
                MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_CI_LARGE_PAGE |
                MMU_FTR_1T_SEGMENT | MMU_FTR_TLBIE_CROP_VA |
+               MMU_FTR_KERNEL_RO |
 #ifdef CONFIG_PPC_RADIX_MMU
                MMU_FTR_TYPE_RADIX |
 #endif