zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/mm/Kconfig.debug b/ap/os/linux/linux-3.4.x/mm/Kconfig.debug
new file mode 100644
index 0000000..4b24432
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/mm/Kconfig.debug
@@ -0,0 +1,29 @@
+config DEBUG_PAGEALLOC
+ bool "Debug page memory allocations"
+ depends on DEBUG_KERNEL
+ depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
+ depends on !KMEMCHECK
+ select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
+ select PAGE_GUARD 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
+ select WANT_PAGE_DEBUG_FLAGS
+
+config PAGE_GUARD
+ bool
+ select WANT_PAGE_DEBUG_FLAGS