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authorAkinobu Mita <akinobu.mita@gmail.com>2011-03-22 19:32:46 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 20:44:02 -0400
commit7bc32f6f90dae67730645da67bfd44304f810f93 (patch)
treecaefa40b2b5563d0e54686b40cb6f6375c2015cb /mm/Kconfig.debug
parent1d16871d8c96deadc5f9753b6b096074f2cbcbe1 (diff)
mm: debug-pagealloc: fix kconfig dependency warning
Fix kconfig dependency warning to satisfy dependencies: warning: (PAGE_POISONING) selects DEBUG_PAGEALLOC which has unmet direct dependencies (DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC && (!HIBERNATION || !PPC && !SPARC) && !KMEMCHECK) Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig.debug')
-rw-r--r--mm/Kconfig.debug25
1 files changed, 11 insertions, 14 deletions
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index af7cfb43d2f0..8b1a477162dc 100644
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -1,27 +1,24 @@
1config DEBUG_PAGEALLOC 1config DEBUG_PAGEALLOC
2 bool "Debug page memory allocations" 2 bool "Debug page memory allocations"
3 depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC 3 depends on DEBUG_KERNEL
4 depends on !HIBERNATION || !PPC && !SPARC 4 depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
5 depends on !KMEMCHECK 5 depends on !KMEMCHECK
6 select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
6 ---help--- 7 ---help---
7 Unmap pages from the kernel linear mapping after free_pages(). 8 Unmap pages from the kernel linear mapping after free_pages().
8 This results in a large slowdown, but helps to find certain types 9 This results in a large slowdown, but helps to find certain types
9 of memory corruption. 10 of memory corruption.
10 11
12 For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC,
13 fill the pages with poison patterns after free_pages() and verify
14 the patterns before alloc_pages(). Additionally,
15 this option cannot be enabled in combination with hibernation as
16 that would result in incorrect warnings of memory corruption after
17 a resume because free pages are not saved to the suspend image.
18
11config WANT_PAGE_DEBUG_FLAGS 19config WANT_PAGE_DEBUG_FLAGS
12 bool 20 bool
13 21
14config PAGE_POISONING 22config PAGE_POISONING
15 bool "Debug page memory allocations" 23 bool
16 depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC
17 depends on !HIBERNATION
18 select DEBUG_PAGEALLOC
19 select WANT_PAGE_DEBUG_FLAGS 24 select WANT_PAGE_DEBUG_FLAGS
20 ---help---
21 Fill the pages with poison patterns after free_pages() and verify
22 the patterns before alloc_pages(). This results in a large slowdown,
23 but helps to find certain types of memory corruption.
24
25 This option cannot be enabled in combination with hibernation as
26 that would result in incorrect warnings of memory corruption after
27 a resume because free pages are not saved to the suspend image.