linux-kernel - Re: linux-next: manual merge of the driver-core tree with the s390 tree

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Message-ID: <ZBlfT3mb5Kmuyh4I@kroah.com>
Date:   Tue, 21 Mar 2023 08:39:59 +0100
From:   Greg KH <greg@...ah.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: Re: linux-next: manual merge of the driver-core tree with the s390
 tree

On Tue, Mar 21, 2023 at 12:34:28PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> Today's linux-next merge of the driver-core tree got a conflict in:
> 
>   arch/s390/kernel/topology.c
> 
> between commit:
> 
>   0599331c3da6 ("s390: simplify one-level sysctl registration for topology_ctl_table")
> 
> from the s390 tree and commit:
> 
>   9493ed19fbc3 ("s390/topology: move to use bus_get_dev_root()")
> 
> from the driver-core tree.
> 
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
> 
> -- 
> Cheers,
> Stephen Rothwell
> 
> diff --cc arch/s390/kernel/topology.c
> index e5d6a1c25d13,72af753d1bba..000000000000
> --- a/arch/s390/kernel/topology.c
> +++ b/arch/s390/kernel/topology.c
> @@@ -637,14 -637,33 +637,23 @@@ static struct ctl_table topology_ctl_ta
>   	{ },
>   };
>   
>  -static struct ctl_table topology_dir_table[] = {
>  -	{
>  -		.procname	= "s390",
>  -		.maxlen		= 0,
>  -		.mode		= 0555,
>  -		.child		= topology_ctl_table,
>  -	},
>  -	{ },
>  -};
>  -
>   static int __init topology_init(void)
>   {
> + 	struct device *dev_root;
> + 	int rc = 0;
> + 
>   	timer_setup(&topology_timer, topology_timer_fn, TIMER_DEFERRABLE);
>   	if (MACHINE_HAS_TOPOLOGY)
>   		set_topology_timer();
>   	else
>   		topology_update_polarization_simple();
>  -	register_sysctl_table(topology_dir_table);
>  +	register_sysctl("s390", topology_ctl_table);
> - 	return device_create_file(cpu_subsys.dev_root, &dev_attr_dispatching);
> + 
> + 	dev_root = bus_get_dev_root(&cpu_subsys);
> + 	if (dev_root) {
> + 		rc = device_create_file(dev_root, &dev_attr_dispatching);
> + 		put_device(dev_root);
> + 	}
> + 	return rc;
>   }
>   device_initcall(topology_init);

Looks correct to me, thanks!

greg k-h