[PATCH 03/30] ipcns: remove useless get/put while CLONE_NEWIPC

[PATCH 03/30] ipcns: remove useless get/put while CLONE_NEWIPC

[Alexey Dobriyan]

copy_ipcs() doesn't actually copy anything. If new ipcns is created,
it's created from scratch, in this case get/put on old ipcns isn't needed.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

 ipc/namespace.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -50,15 +50,11 @@ struct ipc_namespace *copy_ipcs(unsigned long flags, struct ipc_namespace *ns)
 {
 	struct ipc_namespace *new_ns;
 
-	BUG_ON(!ns);
-	get_ipc_ns(ns);
-
 	if (!(flags & CLONE_NEWIPC))
-		return ns;
+		return get_ipc_ns(ns);
 
 	new_ns = clone_ipc_ns(ns);
 
-	put_ipc_ns(ns);
 	return new_ns;
 }
 

Re: [PATCH 03/30] ipcns: remove useless get/put while CLONE_NEWIPC

[Serge E. Hallyn]

Quoting Alexey Dobriyan (adobriyan@gmail.com):
> copy_ipcs() doesn't actually copy anything. If new ipcns is created,
> it's created from scratch, in this case get/put on old ipcns isn't needed.
> 
> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

Yeah, I like this change just for the diffstat.

Acked-by: Serge Hallyn <serue@us.ibm.com>

How about breaking these out from the c/r set?

thanks,
-serge

> ---
> 
>  ipc/namespace.c |    6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> --- a/ipc/namespace.c
> +++ b/ipc/namespace.c
> @@ -50,15 +50,11 @@ struct ipc_namespace *copy_ipcs(unsigned long flags, struct ipc_namespace *ns)
>  {
>  	struct ipc_namespace *new_ns;
> 
> -	BUG_ON(!ns);
> -	get_ipc_ns(ns);
> -
>  	if (!(flags & CLONE_NEWIPC))
> -		return ns;
> +		return get_ipc_ns(ns);
> 
>  	new_ns = clone_ipc_ns(ns);
> 
> -	put_ipc_ns(ns);
>  	return new_ns;
>  }