kmemleak-test: fix kmemleak_test.c build logic

kmemleak-test.c was moved to the samples directory in 1abbef4f51724
("mm,kmemleak-test.c: move kmemleak-test.c to samples dir").

If CONFIG_DEBUG_KMEMLEAK_TEST=m and CONFIG_SAMPLES is unset,
kmemleak-test.c will be unnecessarily compiled.

So move the entry for CONFIG_DEBUG_KMEMLEAK_TEST from mm/Kconfig and add a
new CONFIG_SAMPLE_KMEMLEAK in samples/ to control whether kmemleak-test.c
is built or not.

Link: https://lkml.kernel.org/r/20230330060904.292975-1-gehao@kylinos.cn
Fixes: 1abbef4f51724 ("mm,kmemleak-test.c: move kmemleak-test.c to samples dir")
Signed-off-by: Hao Ge <gehao@kylinos.cn>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Finn Behrens <me@kloenk.dev>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Tony Krowiak <akrowiak@linux.ibm.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index 4965a73..065ed0d 100644 (file)
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -249,14 +249,6 @@ config DEBUG_KMEMLEAK_MEM_POOL_SIZE
          fully initialised, this memory pool acts as an emergency one
          if slab allocations fail.
 
-config DEBUG_KMEMLEAK_TEST
-       tristate "Simple test for the kernel memory leak detector"
-       depends on DEBUG_KMEMLEAK && m
-       help
-         This option enables a module that explicitly leaks memory.
-
-         If unsure, say N.
-
 config DEBUG_KMEMLEAK_DEFAULT_OFF
        bool "Default kmemleak to off"
        depends on DEBUG_KMEMLEAK

diff --git a/samples/Kconfig b/samples/Kconfig
index 30ef8bd..69076fb 100644 (file)
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -273,6 +273,13 @@ config SAMPLE_CORESIGHT_SYSCFG
          This demonstrates how a user may create their own CoreSight
          configurations and easily load them into the system at runtime.
 
+config SAMPLE_KMEMLEAK
+        tristate "Simple test for the kernel memory leak detector"
+        depends on DEBUG_KMEMLEAK && m
+        help
+          Build a sample program which have explicitly leaks memory to test
+          kmemleak
+
 source "samples/rust/Kconfig"
 
 endif # SAMPLES

diff --git a/samples/Makefile b/samples/Makefile
index 7cb632e..7727f1a 100644 (file)
--- a/samples/Makefile
+++ b/samples/Makefile
@@ -33,7 +33,7 @@ subdir-$(CONFIG_SAMPLE_VFS)           += vfs
 obj-$(CONFIG_SAMPLE_INTEL_MEI)         += mei/
 subdir-$(CONFIG_SAMPLE_WATCHDOG)       += watchdog
 subdir-$(CONFIG_SAMPLE_WATCH_QUEUE)    += watch_queue
-obj-$(CONFIG_DEBUG_KMEMLEAK_TEST)      += kmemleak/
+obj-$(CONFIG_SAMPLE_KMEMLEAK)          += kmemleak/
 obj-$(CONFIG_SAMPLE_CORESIGHT_SYSCFG)  += coresight/
 obj-$(CONFIG_SAMPLE_FPROBE)            += fprobe/
 obj-$(CONFIG_SAMPLES_RUST)             += rust/

diff --git a/samples/kmemleak/Makefile b/samples/kmemleak/Makefile
index 16b6132..8a999ab 100644 (file)
--- a/samples/kmemleak/Makefile
+++ b/samples/kmemleak/Makefile
@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
-obj-$(CONFIG_DEBUG_KMEMLEAK_TEST) += kmemleak-test.o
+obj-$(CONFIG_SAMPLE_KMEMLEAK) += kmemleak-test.o