Commit 53bcddb9 authored by Stephen Rothwell's avatar Stephen Rothwell Committed by Paul Mackerras
Browse files

[POWERPC] Fix MAX_ORDER config problem 



The allyesconfig (among others) build was giving this:

In file included from include/linux/gfp.h:4,
                 from include/linux/slab.h:14,
                 from include/linux/percpu.h:5,
                 from include2/asm/time.h:18,
                 from include2/asm/cputime.h:26,
                 from include/linux/sched.h:67,
                 from
arch/powerpc/kernel/asm-offsets.c:17:
include/linux/mmzone.h:791:2: error: #error Allocator MAX_ORDER exceeds SECTION_SIZE

Kconfig options are order depenendent, so move the setting of
FORCE_MAX_ZONEORDER to after the setting of PPC_64K_PAGES. Also add an
explicit !PPC_64K_PAGES.

Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 320787c7

arch/powerpc/Kconfig

+20 −20
Original line number Diff line number Diff line
@@ -211,26 +211,6 @@ source kernel/Kconfig.hz 
source kernel/Kconfig.preempt

source "fs/Kconfig.binfmt"



config FORCE_MAX_ZONEORDER

	int "Maximum zone order"

	default "9" if PPC_64K_PAGES

	default "13" if PPC64

	default "11"

	help

	  The kernel memory allocator divides physically contiguous memory

	  blocks into "zones", where each zone is a power of two number of

	  pages.  This option selects the largest power of two that the kernel

	  keeps in the memory allocator.  If you need to allocate very large

	  blocks of physically contiguous memory, then you may need to

	  increase this value.



	  This config option is actually maximum order plus one. For example,

	  a value of 11 means that the largest free memory block is 2^10 pages.



	  The page size is not necessarily 4KB.  For example, on 64-bit

	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep

	  this in mind when choosing a value for this option.



config HUGETLB_PAGE_SIZE_VARIABLE

	bool

	depends on HUGETLB_PAGE
@@ -403,6 +383,26 @@ config PPC_64K_PAGES 
	  while on hardware with such support, it will be used to map

	  normal application pages.



config FORCE_MAX_ZONEORDER

	int "Maximum zone order"

	default "9" if PPC_64K_PAGES

	default "13" if PPC64 && !PPC_64K_PAGES

	default "11"

	help

	  The kernel memory allocator divides physically contiguous memory

	  blocks into "zones", where each zone is a power of two number of

	  pages.  This option selects the largest power of two that the kernel

	  keeps in the memory allocator.  If you need to allocate very large

	  blocks of physically contiguous memory, then you may need to

	  increase this value.



	  This config option is actually maximum order plus one. For example,

	  a value of 11 means that the largest free memory block is 2^10 pages.



	  The page size is not necessarily 4KB.  For example, on 64-bit

	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep

	  this in mind when choosing a value for this option.



config PPC_SUBPAGE_PROT

	bool "Support setting protections for 4k subpages"

	depends on PPC_64K_PAGES

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