Commit ebe40c5c authored Sep 24, 2008 by Johannes Berg Committed by Benjamin Herrenschmidt Oct 07, 2008

powerpc: Enforce sane MAX_ORDER



powerpc uses CONFIG_FORCE_MAX_ZONEORDER, and some things depend on it
being at least 10 when 64k pages are not configured (notably the dart
iommu code with CONFIG_PM). The defaults are fine, but when going from a
64K pages config to one without 64K pages, MAX_ORDER stays at 9 which is
too low for 4K pages.

This patch makes the Kconfig enforce at least the defaults.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 2e2b4043

arch/powerpc/Kconfig

+3 −0

Original line number	Diff line number	Diff line
		@@ -415,8 +415,11 @@ config PPC_64K_PAGES

		config FORCE_MAX_ZONEORDER
		int "Maximum zone order"
		range 9 64 if PPC_64K_PAGES
		default "9" if PPC_64K_PAGES
		range 13 64 if PPC64 && !PPC_64K_PAGES
		default "13" if PPC64 && !PPC_64K_PAGES
		range 11 64
		default "11"
		help
		The kernel memory allocator divides physically contiguous memory

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