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SubjectRe: [PATCH net] mpls: fix af_mpls dependencies
On Wed, Jun 12, 2019 at 9:41 AM Randy Dunlap <rdunlap@infradead.org> wrote:
> On 6/11/19 5:08 PM, Matteo Croce wrote:
> > On Wed, Jun 12, 2019 at 1:07 AM Randy Dunlap <rdunlap@infradead.org> wrote:
> > * Configure standard kernel features (expert users)
> > *
> > Configure standard kernel features (expert users) (EXPERT) [Y/?] y
> > Multiple users, groups and capabilities support (MULTIUSER) [Y/n/?] y
> > sgetmask/ssetmask syscalls support (SGETMASK_SYSCALL) [N/y/?] n
> > Sysfs syscall support (SYSFS_SYSCALL) [N/y/?] n
> > Sysctl syscall support (SYSCTL_SYSCALL) [N/y/?] (NEW)
>
> So I still say that MPLS_ROUTING should depend on PROC_SYSCTL,
> not select it.

It clearly shouldn't select PROC_SYSCTL, but I think it should not
have a 'depends on' statement either. I think the correct fix for the
original problem would have been something like

--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -2659,6 +2659,9 @@ static int mpls_net_init(struct net *net)
net->mpls.ip_ttl_propagate = 1;
net->mpls.default_ttl = 255;

+ if (!IS_ENABLED(CONFIG_PROC_SYSCTL))
+ return 0;
+
table = kmemdup(mpls_table, sizeof(mpls_table), GFP_KERNEL);
if (table == NULL)
return -ENOMEM;
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