From 29c71111d0557385328211b130246a90f9223b46 Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Tue, 16 Oct 2007 01:24:14 -0700 Subject: vmemmap: generify initialisation via helpers Convert the common vmemmap population into initialisation helpers for use by architecture vmemmap populators. All architecture implementing the SPARSEMEM_VMEMMAP variant supply an architecture specific vmemmap_populate() initialiser, which may make use of the helpers. This allows us to clean up and remove the initialisation Kconfig entries. With this patch there is a single SPARSEMEM_VMEMMAP_ENABLE Kconfig option to indicate use of that variant. Signed-off-by: Andy Whitcroft Acked-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'mm/Kconfig') diff --git a/mm/Kconfig b/mm/Kconfig index a7609cbcb00..b0673066841 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -112,6 +112,19 @@ config SPARSEMEM_EXTREME def_bool y depends on SPARSEMEM && !SPARSEMEM_STATIC +# +# SPARSEMEM_VMEMMAP uses a virtually mapped mem_map to optimise pfn_to_page +# and page_to_pfn. The most efficient option where kernel virtual space is +# not under pressure. +# +config SPARSEMEM_VMEMMAP_ENABLE + def_bool n + +config SPARSEMEM_VMEMMAP + bool + depends on SPARSEMEM + default y if (SPARSEMEM_VMEMMAP_ENABLE) + # eventually, we can have this option just 'select SPARSEMEM' config MEMORY_HOTPLUG bool "Allow for memory hot-add" -- cgit v1.2.3