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SubjectRe: [PATCH 7/7] memcg : remove ugly vairable initialization by callers
On Fri, 21 Jan 2011 15:50:51 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> This is a promised one.
> ==
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
>
> This patch is for removing initialization in caller of memory cgroup
> function. Some memory cgroup uses following style to bring the result
> of start function to the end function for avoiding races.
>
> mem_cgroup_start_A(&(*ptr))
> /* Something very complicated can happen here. */
> mem_cgroup_end_A(*ptr)
>
> In some calls, *ptr should be initialized to NULL be caller. But
> it's ugly. This patch fixes that *ptr is initialized by _start
> function.
>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>


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