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SubjectRe: [PATCH 1/1 linux-next] ieee802154: add __init to lowpan_frags_sysctl_register
Hi,

On Tue, Sep 30, 2014 at 10:34:08PM +0200, Fabian Frederick wrote:
> lowpan_frags_sysctl_register is only called by __init lowpan_net_frag_init
> (part of the lowpan module).
>
> Signed-off-by: Fabian Frederick <fabf@skynet.be>
> ---
> This is untested.
>
> net/ieee802154/reassembly.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/net/ieee802154/reassembly.c b/net/ieee802154/reassembly.c
> index 32755cb..30ec608 100644
> --- a/net/ieee802154/reassembly.c
> +++ b/net/ieee802154/reassembly.c
> @@ -485,7 +485,7 @@ static void __net_exit lowpan_frags_ns_sysctl_unregister(struct net *net)
>
> static struct ctl_table_header *lowpan_ctl_header;
>
> -static int lowpan_frags_sysctl_register(void)
> +static int __init lowpan_frags_sysctl_register(void)

yes right, but there is more lacks of missing "__init". See below.

> {
> lowpan_ctl_header = register_net_sysctl(&init_net,
> "net/ieee802154/6lowpan",
> @@ -498,7 +498,7 @@ static void lowpan_frags_sysctl_unregister(void)
> unregister_net_sysctl_table(lowpan_ctl_header);
> }
> #else
> -static inline int lowpan_frags_ns_sysctl_register(struct net *net)
> +static inline int __init lowpan_frags_ns_sysctl_register(struct net *net)

This is wrong, it's callback from "struct pernet_operations lowpan_frags_ops".

> {
> return 0;
> }


Your patch adds "__init" now for two different functions and we have
two different declarations for these functions, depends if CONFIG_SYSCTL is
enabled.

Now if CONFIG_SYSCTL select we have as lowpan_frags_sysctl_register declaration:

static int __init lowpan_frags_sysctl_register(void)

if not:

static inline int lowpan_frags_sysctl_register(void)

Same for lowpan_frags_ns_sysctl_register and vice versa for CONFIG_SYSCTL.

Your changes are for two different functions (Don't know if you realized that):

"lowpan_frags_sysctl_register" and "lowpan_frags_ns_sysctl_register",
which makes no sense. Also lowpan_frags_ns_sysctl_register isn't called
by module init which is wrong.


To make "correct" cleanup for this "__init" should be add to the functions, for
both declarations if CONFIG_SYSCTL is set or not:

- lowpan_net_frag_init
- lowpan_frags_sysctl_register


I see now it's already applied, David please revert this change. Are you
fine to apply a correct version of this to wpan-next tree, next time?

- Alex


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