Re: [PATCH 11/13] random: simplify sysctl declaration with register_sysctl_subdir()

[Greg KH]

On Fri, May 29, 2020 at 07:41:06AM +0000, Luis Chamberlain wrote:
> From: Xiaoming Ni <nixiaoming@xxxxxxxxxx>
> 
> Move random_table sysctl from kernel/sysctl.c to drivers/char/random.c
> and use register_sysctl_subdir() to help remove the clutter out of
> kernel/sysctl.c.
> 
> Signed-off-by: Xiaoming Ni <nixiaoming@xxxxxxxxxx>
> Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
> ---
>  drivers/char/random.c  | 14 ++++++++++++--
>  include/linux/sysctl.h |  1 -
>  kernel/sysctl.c        |  5 -----
>  3 files changed, 12 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/char/random.c b/drivers/char/random.c
> index a7cf6aa65908..73fd4b6e9c18 100644
> --- a/drivers/char/random.c
> +++ b/drivers/char/random.c
> @@ -2101,8 +2101,7 @@ static int proc_do_entropy(struct ctl_table *table, int write,
>  }
>  
>  static int sysctl_poolsize = INPUT_POOL_WORDS * 32;
> -extern struct ctl_table random_table[];
> -struct ctl_table random_table[] = {
> +static struct ctl_table random_table[] = {
>  	{
>  		.procname	= "poolsize",
>  		.data		= &sysctl_poolsize,
> @@ -2164,6 +2163,17 @@ struct ctl_table random_table[] = {
>  #endif
>  	{ }
>  };
> +
> +/*
> + * rand_initialize() is called before sysctl_init(),
> + * so we cannot call register_sysctl_init() in rand_initialize()
> + */
> +static int __init random_sysctls_init(void)
> +{
> +	register_sysctl_subdir("kernel", "random", random_table);

No error checking?

:(