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authorJohannes Berg <johannes@sipsolutions.net>2008-09-24 04:29:08 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-10-07 14:26:20 +1100
commitebe40c5c4c888f2cbfd9f0880a8bc072e6fc3a0d (patch)
tree165f42619606c83fbc8b87016aa67e50448a7094
parent2e2b4043cc0a2c11abbe4fdff6dce3f81cff3e30 (diff)
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>
-rw-r--r--arch/powerpc/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 17c988b678d..c171f5bcf25 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -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