kconfig: include kernel/Kconfig.preempt from init/Kconfig

Almost all architectures include it.  Add a ARCH_NO_PREEMPT symbol to
disable preempt support for alpha, hexagon, non-coldfire m68k and
user mode Linux.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
index 3f9c97419f02..cd1655122ec0 100644
--- a/kernel/Kconfig.preempt
+++ b/kernel/Kconfig.preempt
@@ -18,6 +18,7 @@ config PREEMPT_NONE
 
 config PREEMPT_VOLUNTARY
         bool "Voluntary Kernel Preemption (Desktop)"
+        depends on !ARCH_NO_PREEMPT
         help
           This option reduces the latency of the kernel by adding more
           "explicit preemption points" to the kernel code. These new
@@ -35,6 +36,7 @@ config PREEMPT_VOLUNTARY
 
 config PREEMPT
         bool "Preemptible Kernel (Low-Latency Desktop)"
+        depends on !ARCH_NO_PREEMPT
         select PREEMPT_COUNT
         select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK
         help