--- arch/arm/Kconfig

+++ arch/arm/Kconfig

@@ -21,6 +21,7 @@ config ARM

select HAVE_KERNEL_GZIP

select HAVE_KERNEL_LZO

select HAVE_KERNEL_LZMA

+ select HAVE_KERNEL_XZ

select HAVE_IRQ_WORK

select HAVE_PERF_EVENTS

select PERF_USE_VMALLOC

@@ -31,6 +32,8 @@ config ARM

select HAVE_SPARSE_IRQ

select GENERIC_IRQ_SHOW

select HAVE_BPF_JIT

+ select GENERIC_STRNCPY_FROM_USER

+ select GENERIC_STRNLEN_USER

help

The ARM series is a line of low-power-consumption RISC chip designs

licensed by ARM Ltd and targeted at embedded applications and

@@ -1708,6 +1711,16 @@ config ALIGNMENT_TRAP

correct operation of some network protocols. With an IP-only

configuration it is safe to say N, otherwise say Y.

+config ALLOW_CPU_ALIGNMENT

+ bool "Allow CPU-based alignment handling"

+ default y if ARCH_MSM_SCORPION || ARCH_MSM_SCORPIONMP

+ help

+ Advanced ARM processors, such as the Cortex series and ARMv7-based

+ CPUS are capable of performing unaligned accesses for many types of

+ memory accesses. Typically, using a cpu-based alignment fixup is

+ faster than doing such a fixup in software. For best performance

+ on advanced CPUs, say Y here.

+

config UACCESS_WITH_MEMCPY

bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"

depends on MMU && EXPERIMENTAL