[RFC PATCH] PPC32: Fix build failure caused by missing dirty pte handlers

From: Pranith Kumar
Date: Mon Jan 25 2016 - 09:23:17 EST


In 4.5-rc1, I am getting a build failure as follows:

mm/memory.c: In function âdo_swap_pageâ:
mm/memory.c:2573:9: error: implicit declaration of function âpte_mksoft_dirtyâ
[-Werror=implicit-function-declaration]
pte = pte_mksoft_dirty(pte);

The soft dirty pte handlers are declared only for PPC64 on PPC_BOOK3S in
arch/powerpc/include/asm/book3s/64/hash.h and missing in the 32-bit arch.

Avoid this error by not setting HAVE_ARCH_SOFT_DIRTY for 32-bit system.

Signed-off-by: Pranith Kumar <bobby.prani@xxxxxxxxx>
---
arch/powerpc/Kconfig | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e4824fd..21cb5c5 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -557,7 +557,7 @@ choice

config PPC_4K_PAGES
bool "4k page size"
- select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S
+ select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S && PPC64

config PPC_16K_PAGES
bool "16k page size"
@@ -566,7 +566,7 @@ config PPC_16K_PAGES
config PPC_64K_PAGES
bool "64k page size"
depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
- select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S
+ select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S && PPC64

config PPC_256K_PAGES
bool "256k page size"
--
2.7.0