[ARM] Feroceon: Feroceon-specific WA-cache compatible {copy,clear}_user_page()

This patch implements a set of Feroceon-specific
{copy,clear}_user_page() routines that perform more optimally than
the generic implementations.  This also deals with write-allocate
caches (Feroceon can run L1 D in WA mode) which otherwise prevents
Linux from booting.

[nico: optimized the code even further]

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Sylver Bruneau <sylver.bruneau@googlemail.com>
Tested-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index a92a577c1b65..33ed048502a3 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -372,7 +372,7 @@ config CPU_FEROCEON
         select CPU_PABRT_NOIFAR
         select CPU_CACHE_VIVT
         select CPU_CP15_MMU
-        select CPU_COPY_V4WB if MMU
+        select CPU_COPY_FEROCEON if MMU
         select CPU_TLB_V4WBI if MMU
 
 config CPU_FEROCEON_OLD_ID
@@ -523,6 +523,9 @@ config CPU_COPY_V4WT
 config CPU_COPY_V4WB
         bool
 
+config CPU_COPY_FEROCEON
+        bool
+
 config CPU_COPY_V6
         bool