When unloading the module, one gets
[ 548.188594] ------------[ cut here ]------------
[ 548.188596] Device 'cmm0' does not have a release() function, it is broken
and must be fixed. See Documentation/kobject.txt.
[ 548.188622] WARNING: CPU: 0 PID: 19308 at drivers/base/core.c:1244
.device_release+0xcc/0xf0
...
We only have on static fake device. There is nothing to do when
releasing the device (via cmm_exit).
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
Cc: Allison Randal <alli...@lohutok.net>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Arun KS <aru...@codeaurora.org>
Signed-off-by: David Hildenbrand <da...@redhat.com>
---
arch/powerpc/platforms/pseries/cmm.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/cmm.c
b/arch/powerpc/platforms/pseries/cmm.c
index b33251d75927..572651a5c87b 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -411,6 +411,10 @@ static struct bus_type cmm_subsys = {
.dev_name = "cmm",
};
+static void cmm_release_device(struct device *dev)
+{
+}
+
/**
* cmm_sysfs_register - Register with sysfs
*
@@ -426,6 +430,7 @@ static int cmm_sysfs_register(struct device *dev)
dev->id = 0;
dev->bus = &cmm_subsys;
+ dev->release = cmm_release_device;
if ((rc = device_register(dev)))
goto subsys_unregister;
--
2.21.0
