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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>
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commit 7bc32f6f90dae67730645da67bfd44304f810f93 1 parent 1d16871
@mita mita authored torvalds committed
Showing with 11 additions and 14 deletions.
  1. +11 −14 mm/Kconfig.debug
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25 mm/Kconfig.debug
@@ -1,27 +1,24 @@
config DEBUG_PAGEALLOC
bool "Debug page memory allocations"
- depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC
- depends on !HIBERNATION || !PPC && !SPARC
+ depends on DEBUG_KERNEL
+ depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
depends on !KMEMCHECK
+ select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
---help---
Unmap pages from the kernel linear mapping after free_pages().
This results in a large slowdown, but helps to find certain types
of memory corruption.
+ For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC,
+ fill the pages with poison patterns after free_pages() and verify
+ the patterns before alloc_pages(). Additionally,
+ this option cannot be enabled in combination with hibernation as
+ that would result in incorrect warnings of memory corruption after
+ a resume because free pages are not saved to the suspend image.
+
config WANT_PAGE_DEBUG_FLAGS
bool
config PAGE_POISONING
- bool "Debug page memory allocations"
- depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC
- depends on !HIBERNATION
- select DEBUG_PAGEALLOC
+ bool
select WANT_PAGE_DEBUG_FLAGS
- ---help---
- Fill the pages with poison patterns after free_pages() and verify
- the patterns before alloc_pages(). This results in a large slowdown,
- but helps to find certain types of memory corruption.
-
- This option cannot be enabled in combination with hibernation as
- that would result in incorrect warnings of memory corruption after
- a resume because free pages are not saved to the suspend image.
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