linux-kernel - Re: [PATCH 3/5] tty: n_gsm: Added refcount usage to gsm_mux and gsm

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Date:	Fri, 3 Jun 2011 23:08:36 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Russ Gorby <russ.gorby@...el.com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	suhail.ahmed@...el.com
Subject: Re: [PATCH 3/5] tty: n_gsm: Added refcount usage to gsm_mux and
 gsm_dlci structs

> To avoid this, gsm_mux and dlcis now have a reference counter
> ldisc open takes a reference on the mux and all the dlcis
> gsmtty_open takes a reference on the mux, dlci0 and its specific
> dlci. Dropping the last reference initiates the actual free.

Definitely the right direction. Only comment really is style related

We usualyl define

struct foo *foo_get(struct foo *)
void foo_put(struct foo *)

helpers/inlines just make it clearer and keep the knowledge of the
function pointer etc in one place

Also when you take a reference this lets you write the more natural
reading

	bar->foo = foo_get(foo);


Alan
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