Re: [PATCH 02/38] utsns: extract create_uts_ns()

["Serge E. Hallyn" <serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org>]

Quoting Alexey Dobriyan (adobriyan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org):
> create_uts_ns() will be used by C/R to create fresh uts_ns.
> 
> Signed-off-by: Alexey Dobriyan <adobriyan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Acked-by: Serge Hallyn <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>

> ---
>  kernel/utsname.c |   13 +++++++++++--
>  1 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/utsname.c b/kernel/utsname.c
> index 815237a..8a82b4b 100644
> --- a/kernel/utsname.c
> +++ b/kernel/utsname.c
> @@ -15,6 +15,16 @@
>  #include <linux/err.h>
>  #include <linux/slab.h>
>  
> +static struct uts_namespace *create_uts_ns(void)
> +{
> +	struct uts_namespace *uts_ns;
> +
> +	uts_ns = kmalloc(sizeof(struct uts_namespace), GFP_KERNEL);
> +	if (uts_ns)
> +		kref_init(&uts_ns->kref);
> +	return uts_ns;
> +}
> +
>  /*
>   * Clone a new ns copying an original utsname, setting refcount to 1
>   * @old_ns: namespace to clone
> @@ -24,14 +34,13 @@ static struct uts_namespace *clone_uts_ns(struct uts_namespace *old_ns)
>  {
>  	struct uts_namespace *ns;
>  
> -	ns = kmalloc(sizeof(struct uts_namespace), GFP_KERNEL);
> +	ns = create_uts_ns();
>  	if (!ns)
>  		return ERR_PTR(-ENOMEM);
>  
>  	down_read(&uts_sem);
>  	memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
>  	up_read(&uts_sem);
> -	kref_init(&ns->kref);
>  	return ns;
>  }
>  
> -- 
> 1.5.6.5
> 
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