mm,kmemleak-test.c: move kmemleak-test.c to samples dir

kmemleak-test.c is just a kmemleak test module, which also can not be used
as a built-in kernel module.  Thus, i think it may should not be in mm
dir, and move the kmemleak-test.c to samples/kmemleak/kmemleak-test.c.
Fix the spelling of built-in by the way.

Signed-off-by: Hui Su <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Steven Rostedt (VMware) <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Divya Indi <[email protected]>
Cc: Tomas Winkler <[email protected]>
Cc: David Howells <[email protected]>
Link: https://lkml.kernel.org/r/20200925183729.GA172837@rlk
Signed-off-by: Linus Torvalds <[email protected]>

Documentation/dev-tools/kmemleak.rst

@@ -229,7 +229,7 @@ Testing with kmemleak-test
 
 To check if you have all set up to use kmemleak, you can use the kmemleak-test
 module, a module that deliberately leaks memory. Set CONFIG_DEBUG_KMEMLEAK_TEST
-as module (it can't be used as bult-in) and boot the kernel with kmemleak
+as module (it can't be used as built-in) and boot the kernel with kmemleak
 enabled. Load the module and perform a scan with::
 
         # modprobe kmemleak-test

MAINTAINERS

@@ -9727,8 +9727,8 @@ M:	Catalin Marinas <[email protected]>
 S:	Maintained
 F:	Documentation/dev-tools/kmemleak.rst
 F:	include/linux/kmemleak.h
-F:	mm/kmemleak-test.c
 F:	mm/kmemleak.c
+F:	samples/kmemleak/kmemleak-test.c
 
 KMOD KERNEL MODULE LOADER - USERMODE HELPER
 M:	Luis Chamberlain <[email protected]>

mm/Makefile

@@ -94,7 +94,6 @@ obj-$(CONFIG_GUP_BENCHMARK) += gup_benchmark.o
 obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o
 obj-$(CONFIG_HWPOISON_INJECT) += hwpoison-inject.o
 obj-$(CONFIG_DEBUG_KMEMLEAK) += kmemleak.o
-obj-$(CONFIG_DEBUG_KMEMLEAK_TEST) += kmemleak-test.o
 obj-$(CONFIG_DEBUG_RODATA_TEST) += rodata_test.o
 obj-$(CONFIG_DEBUG_VM_PGTABLE) += debug_vm_pgtable.o
 obj-$(CONFIG_PAGE_OWNER) += page_owner.o

samples/Makefile

@@ -28,3 +28,4 @@ subdir-$(CONFIG_SAMPLE_VFS)		+= vfs
 obj-$(CONFIG_SAMPLE_INTEL_MEI)		+= mei/
 subdir-$(CONFIG_SAMPLE_WATCHDOG)	+= watchdog
 subdir-$(CONFIG_SAMPLE_WATCH_QUEUE)	+= watch_queue
+obj-$(CONFIG_DEBUG_KMEMLEAK_TEST)	+= kmemleak/

samples/kmemleak/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_DEBUG_KMEMLEAK_TEST) += kmemleak-test.o

samples/kmemleak/kmemleak-test.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * mm/kmemleak-test.c
+ * samples/kmemleak/kmemleak-test.c
  *
  * Copyright (C) 2008 ARM Limited
  * Written by Catalin Marinas <catalin.marinas@arm.com>