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vmemmap: generify initialisation via helpers

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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 <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andy Whitcroft 2007-10-16 01:24:14 -07:00 • committed by Linus Torvalds
commit 29c71111d0
3 changed files with 83 additions and 98 deletions
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13
mm/Kconfig
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@ -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"