ARM: add help text for HIGHPTE configuration entry

Add some help text for the HIGHPTE configuration entry.  This comes from
the x86 entry, but reworded to be more a more accurate description of
what this option does.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 45df48ba0b12..cc0ea0c6cfc9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1661,6 +1661,12 @@ config HIGHMEM
 config HIGHPTE
         bool "Allocate 2nd-level pagetables from highmem"
         depends on HIGHMEM
+        help
+          The VM uses one page of physical memory for each page table.
+          For systems with a lot of processes, this can use a lot of
+          precious low memory, eventually leading to low memory being
+          consumed by page tables.  Setting this option will allow
+          user-space 2nd level page tables to reside in high memory.
 
 config HW_PERF_EVENTS
         bool "Enable hardware performance counter support for perf events"