ARM: Allow SMP kernels to boot on UP systems

[mv-sheeva.git] / arch / arm / Kconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6a939e64cbd79c84f8b39fc1f4753acc145cfc0e..f6cdc21b562cd0c616e16e605bed5c133fcaa6ca 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1191,6 +1191,19 @@ config SMP
 
          If you don't know what to do here, say N.
 
+config SMP_ON_UP
+       bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
+       depends on EXPERIMENTAL
+       depends on SMP && !XIP && !THUMB2_KERNEL
+       default y
+       help
+         SMP kernels contain instructions which fail on non-SMP processors.
+         Enabling this option allows the kernel to modify itself to make
+         these instructions safe.  Disabling it allows about 1K of space
+         savings.
+
+         If you don't know what to do here, say Y.
+
 config HAVE_ARM_SCU
        bool
        depends on SMP