This field was added in commit 44510d6fa0c0 ("s390/pci: Handling
multifunctions") but is an unused remnant of an earlier version where
the devices on the virtual bus were connected in a linked list instead
of a fixed 256 entry array of pointers.

It is also not used for the list of busses as that is threaded through
struct zpci_bus not through struct zpci_dev.

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
---
 arch/s390/include/asm/pci.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 7b4cdadbc023..108e732d7b14 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -117,7 +117,6 @@ struct zpci_bus {
 struct zpci_dev {
 	struct zpci_bus *zbus;
 	struct list_head entry;		/* list of all zpci_devices, needed for hotplug, etc. */
-	struct list_head bus_next;
 	struct kref kref;
 	struct hotplug_slot hotplug_slot;
 
-- 
2.34.1

On 9/22/22 11:52, Niklas Schnelle wrote:
> This field was added in commit 44510d6fa0c0 ("s390/pci: Handling
> multifunctions") but is an unused remnant of an earlier version where
> the devices on the virtual bus were connected in a linked list instead
> of a fixed 256 entry array of pointers.
> 
> It is also not used for the list of busses as that is threaded through
> struct zpci_bus not through struct zpci_dev.
> 
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>

Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>


> ---
>   arch/s390/include/asm/pci.h | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
> index 7b4cdadbc023..108e732d7b14 100644
> --- a/arch/s390/include/asm/pci.h
> +++ b/arch/s390/include/asm/pci.h
> @@ -117,7 +117,6 @@ struct zpci_bus {
>   struct zpci_dev {
>   	struct zpci_bus *zbus;
>   	struct list_head entry;		/* list of all zpci_devices, needed for hotplug, etc. */
> -	struct list_head bus_next;
>   	struct kref kref;
>   	struct hotplug_slot hotplug_slot;
>   

-- 
Pierre Morel
IBM Lab Boeblingen

On 9/26/22 11:17, Pierre Morel wrote:
> 
> 
> On 9/22/22 11:52, Niklas Schnelle wrote:
>> This field was added in commit 44510d6fa0c0 ("s390/pci: Handling
>> multifunctions") but is an unused remnant of an earlier version where
>> the devices on the virtual bus were connected in a linked list instead
>> of a fixed 256 entry array of pointers.
>>
>> It is also not used for the list of busses as that is threaded through
>> struct zpci_bus not through struct zpci_dev.
>>
>> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> 
> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
> 
> 

Also couldn't it be detached of the series and posted on its own?

>> ---
>>   arch/s390/include/asm/pci.h | 1 -
>>   1 file changed, 1 deletion(-)
>>
>> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
>> index 7b4cdadbc023..108e732d7b14 100644
>> --- a/arch/s390/include/asm/pci.h
>> +++ b/arch/s390/include/asm/pci.h
>> @@ -117,7 +117,6 @@ struct zpci_bus {
>>   struct zpci_dev {
>>       struct zpci_bus *zbus;
>>       struct list_head entry;        /* list of all zpci_devices, 
>> needed for hotplug, etc. */
>> -    struct list_head bus_next;
>>       struct kref kref;
>>       struct hotplug_slot hotplug_slot;
> 

-- 
Pierre Morel
IBM Lab Boeblingen

On Mon, 2022-09-26 at 11:23 +0200, Pierre Morel wrote:
> 
> On 9/26/22 11:17, Pierre Morel wrote:
> > 
> > On 9/22/22 11:52, Niklas Schnelle wrote:
> > > This field was added in commit 44510d6fa0c0 ("s390/pci: Handling
> > > multifunctions") but is an unused remnant of an earlier version where
> > > the devices on the virtual bus were connected in a linked list instead
> > > of a fixed 256 entry array of pointers.
> > > 
> > > It is also not used for the list of busses as that is threaded through
> > > struct zpci_bus not through struct zpci_dev.
> > > 
> > > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> > 
> > Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
> > 
> > 
> 
> Also couldn't it be detached of the series and posted on its own?

As this is entirely s390 specific this can go via the s390 tree without
re-posting. Since we're still figuring the rest of the series out it
might even make it upstream before that and then we can more easily
refer to it as a pre-requisite.

> 
> > > ---
> > >   arch/s390/include/asm/pci.h | 1 -
> > >   1 file changed, 1 deletion(-)
> > > 
> > > diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
> > > index 7b4cdadbc023..108e732d7b14 100644
> > > --- a/arch/s390/include/asm/pci.h
> > > +++ b/arch/s390/include/asm/pci.h
> > > @@ -117,7 +117,6 @@ struct zpci_bus {
> > >   struct zpci_dev {
> > >       struct zpci_bus *zbus;
> > >       struct list_head entry;        /* list of all zpci_devices, 
> > > needed for hotplug, etc. */
> > > -    struct list_head bus_next;
> > >       struct kref kref;
> > >       struct hotplug_slot hotplug_slot;