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Subject[PATCH 12/14] kmemleak: Enable the building of the memory leak detector
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This patch adds the Kconfig.debug and Makefile entries needed for
building kmemleak into the kernel.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
lib/Kconfig.debug | 22 ++++++++++++++++++++++
mm/Makefile | 1 +
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index b0f239e..a45aeb5 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -290,6 +290,28 @@ config SLUB_STATS
out which slabs are relevant to a particular load.
Try running: slabinfo -DA

+config DEBUG_KMEMLEAK
+ bool "Kernel memory leak detector"
+ default n
+ depends on EXPERIMENTAL
+ select DEBUG_SLAB if SLAB
+ select SLUB_DEBUG if SLUB
+ select DEBUG_FS if SYSFS
+ select STACKTRACE if STACKTRACE_SUPPORT
+ select KALLSYMS
+ help
+ Say Y here if you want to enable the memory leak
+ detector. The memory allocation/freeing is traced in a way
+ similar to the Boehm's conservative garbage collector, the
+ difference being that the orphan objects are not freed but
+ only shown in /sys/kernel/debug/kmemleak. Enabling this
+ feature will introduce an overhead to memory
+ allocations. See Documentation/kmemleak.txt for more
+ details.
+
+ In order to access the kmemleak file, debugfs needs to be
+ mounted (usually at /sys/kernel/debug).
+
config DEBUG_PREEMPT
bool "Debug preemptible kernel"
depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64)
diff --git a/mm/Makefile b/mm/Makefile
index c06b45a..c2dd3e0 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -34,3 +34,4 @@ obj-$(CONFIG_MIGRATION) += migrate.o
obj-$(CONFIG_SMP) += allocpercpu.o
obj-$(CONFIG_QUICKLIST) += quicklist.o
obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o
+obj-$(CONFIG_DEBUG_KMEMLEAK) += kmemleak.o


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