ARC: uaccess: use optimized generic __strnlen_user/__strncpy_from_user

The existing ARC variants have 2 issues
 - Use ZOL which may not be present in forthcoming architecture
 - Byte loop based vs. generic version which is word loop based

Signed-off-by: Vineet Gupta <vgupta@kernel.org>

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 96cf8720bb93910d3171c2fbe89d127166bbab23..47b4acc7d0c9cd9a452edc5a57eb21151c16b740 100644 (file)
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -26,6 +26,8 @@ config ARC
        select GENERIC_PENDING_IRQ if SMP
        select GENERIC_SCHED_CLOCK
        select GENERIC_SMP_IDLE_THREAD
+       select GENERIC_STRNCPY_FROM_USER if MMU
+       select GENERIC_STRNLEN_USER if MMU
        select HAVE_ARCH_KGDB
        select HAVE_ARCH_TRACEHOOK
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE if ARC_MMU_V4