diff mbox series

[v1,01/12] powerpc/pseries: CMM: Implement release() function for sysfs device

Message ID 20191031142933.10779-2-david@redhat.com (mailing list archive)
State Accepted
Commit 7d8212747435c534c8d564fbef4541a463c976ff
Headers show
Series powerpc/pseries: CMM: Implement balloon compaction and remove isolate notifier | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (904ea5d546fe35c670396e4813e15c8b075b69f1)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 17 lines checked

Commit Message

David Hildenbrand Oct. 31, 2019, 2:29 p.m. UTC
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 <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Allison Randal <allison@lohutok.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Arun KS <arunks@codeaurora.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 arch/powerpc/platforms/pseries/cmm.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Michael Ellerman Nov. 14, 2019, 9:08 a.m. UTC | #1
On Thu, 2019-10-31 at 14:29:22 UTC, David Hildenbrand wrote:
> When unloading the module, one gets
> [  548.188594] ------------[ cut here ]------------
> [  548.188596] Device 'cmm0' does not have a release() function, it is brok=
> en and must be fixed. See Documentation/kobject.txt.
> [  548.188622] WARNING: CPU: 0 PID: 19308 at drivers/base/core.c:1244 .devi=
> ce_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 <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Vlastimil Babka <vbabka@suse.cz>
> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
> Cc: Allison Randal <allison@lohutok.net>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Arun KS <arunks@codeaurora.org>
> Signed-off-by: David Hildenbrand <david@redhat.com>

Patches 1-10 applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/7d8212747435c534c8d564fbef4541a463c976ff

cheers
David Hildenbrand Nov. 14, 2019, 12:21 p.m. UTC | #2
On 14.11.19 10:08, Michael Ellerman wrote:
> On Thu, 2019-10-31 at 14:29:22 UTC, David Hildenbrand wrote:
>> When unloading the module, one gets
>> [  548.188594] ------------[ cut here ]------------
>> [  548.188596] Device 'cmm0' does not have a release() function, it is brok=
>> en and must be fixed. See Documentation/kobject.txt.
>> [  548.188622] WARNING: CPU: 0 PID: 19308 at drivers/base/core.c:1244 .devi=
>> ce_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 <benh@kernel.crashing.org>
>> Cc: Paul Mackerras <paulus@samba.org>
>> Cc: Michael Ellerman <mpe@ellerman.id.au>
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>> Cc: Vlastimil Babka <vbabka@suse.cz>
>> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
>> Cc: Allison Randal <allison@lohutok.net>
>> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> Cc: Thomas Gleixner <tglx@linutronix.de>
>> Cc: Arun KS <arunks@codeaurora.org>
>> Signed-off-by: David Hildenbrand <david@redhat.com>
> 
> Patches 1-10 applied to powerpc next, thanks.
> 
> https://git.kernel.org/powerpc/c/7d8212747435c534c8d564fbef4541a463c976ff
> 
> cheers
> 

Thanks! I'll probably resend patch 11/12 to give it more attention and 
to fixup one comment leftover in patch 11. I guess if we get ACKs these 
two patch should also go via your tree to avoid collisions.
David Hildenbrand Nov. 20, 2019, 10:35 a.m. UTC | #3
On 14.11.19 10:08, Michael Ellerman wrote:
> On Thu, 2019-10-31 at 14:29:22 UTC, David Hildenbrand wrote:
>> When unloading the module, one gets
>> [  548.188594] ------------[ cut here ]------------
>> [  548.188596] Device 'cmm0' does not have a release() function, it is brok=
>> en and must be fixed. See Documentation/kobject.txt.
>> [  548.188622] WARNING: CPU: 0 PID: 19308 at drivers/base/core.c:1244 .devi=
>> ce_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 <benh@kernel.crashing.org>
>> Cc: Paul Mackerras <paulus@samba.org>
>> Cc: Michael Ellerman <mpe@ellerman.id.au>
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>> Cc: Vlastimil Babka <vbabka@suse.cz>
>> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
>> Cc: Allison Randal <allison@lohutok.net>
>> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> Cc: Thomas Gleixner <tglx@linutronix.de>
>> Cc: Arun KS <arunks@codeaurora.org>
>> Signed-off-by: David Hildenbrand <david@redhat.com>
> 
> Patches 1-10 applied to powerpc next, thanks.
> 
> https://git.kernel.org/powerpc/c/7d8212747435c534c8d564fbef4541a463c976ff
> 
> cheers
> 

Hi Michael,

just to make sure you saw the two MM patches (and the ACKs from Michal)

https://lkml.org/lkml/2019/11/14/410

if you prefer that Andrew picks these up, please let me know.

Cheers!
diff mbox series

Patch

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;