linux-kernel - Re: [PATCH 1/4] sys: remove unnecesscary parameter of set_one

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Date:	Thu, 30 May 2013 01:08:25 -0700
From:	Joe Perches <joe@...ches.com>
To:	liguang <lig.fnst@...fujitsu.com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Dave Jones <davej@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Al Viro <viro@...iv.linux.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] sys: remove unnecesscary parameter of set_one_prio

On Thu, 2013-05-30 at 15:58 +0800, liguang wrote:
[]
> diff --git a/kernel/sys.c b/kernel/sys.c
[]
> -static int set_one_prio(struct task_struct *p, int niceval, int error)
> +static int set_one_prio(struct task_struct *p, int niceval)

Umm, error is forwarded through do_each loops.

Are you sure you can do this without
changing any return code behaviors?

[]

> @@ -211,7 +209,7 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
>  			else
>  				pgrp = task_pgrp(current);
>  			do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
> -				error = set_one_prio(p, niceval, error);
> +				error = set_one_prio(p, niceval);
>  			} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
>  			break;
>  		case PRIO_USER:
> @@ -225,7 +223,7 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
>  
>  			do_each_thread(g, p) {
>  				if (uid_eq(task_uid(p), uid))
> -					error = set_one_prio(p, niceval, error);
> +					error = set_one_prio(p, niceval);
>  			} while_each_thread(g, p);
>  			if (!uid_eq(uid, cred->uid))
>  				free_uid(user);		/* For find_user() */



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