ARM: phys-to-virt: improve Kconfig help texts

Improve the Kconfig help texts for the phys-to-virt patching feature.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a816a93..3f3faaa 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -197,15 +197,21 @@ config ARM_PATCH_PHYS_VIRT
        depends on !XIP_KERNEL && MMU
        depends on !ARCH_REALVIEW || !SPARSEMEM
        help
-         Patch phys-to-virt translation functions at runtime according to
-         the position of the kernel in system memory.
+         Patch phys-to-virt and virt-to-phys translation functions at
+         boot and module load time according to the position of the
+         kernel in system memory.
 
-         This can only be used with non-XIP with MMU kernels where
-         the base of physical memory is at a 16MB boundary.
+         This can only be used with non-XIP MMU kernels where the base
+         of physical memory is at a 16MB boundary, or theoretically 64K
+         for the MSM machine class.
 
 config ARM_PATCH_PHYS_VIRT_16BIT
        def_bool y
        depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
+       help
+         This option extends the physical to virtual translation patching
+         to allow physical memory down to a theoretical minimum of 64K
+         boundaries.
 
 source "init/Kconfig"