linux-kernel - Re: [PATCH RFC tip/core/rcu 14/14] rcu: Add boosting to TREE_PREEMPT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4D6479E8.3030800@cn.fujitsu.com>
Date:	Wed, 23 Feb 2011 11:07:20 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	"Paul E. McKenney" <paul.mckenney@...aro.org>
Subject: Re: [PATCH RFC tip/core/rcu 14/14] rcu: Add boosting to TREE_PREEMPT_RCU
 tracing

On 02/23/2011 09:39 AM, Paul E. McKenney wrote:
>  	rcudir = debugfs_create_dir("rcu", NULL);
> -	if (!rcudir)
> +	if (IS_ERR_VALUE(rcudir))
>  		goto free_out;

if !defined(CONFIG_DEBUG_FS)
	debugfs_create_xxx() returns ERR_PTR(-ENODEV);
else
	debugfs_create_xxx() returns NULL when failed.

Since TREE_RCU_TRACE selects DEBUG_FS, "if (!rcudir)" is correct,
we don't need to change it.

>  
>  	retval = debugfs_create_file("rcudata", 0444, rcudir,
>  						NULL, &rcudata_fops);
> -	if (!retval)
> +	if (IS_ERR_VALUE(retval))
>  		goto free_out;
>  
>  	retval = debugfs_create_file("rcudata.csv", 0444, rcudir,
>  						NULL, &rcudata_csv_fops);
> -	if (!retval)
> +	if (IS_ERR_VALUE(retval))
> +		goto free_out;
> +
> +	retval = rcu_boost_trace_create_file(rcudir);
> +	if (retval)
>  		goto free_out;
>  
>  	retval = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops);
> -	if (!retval)
> +	if (IS_ERR_VALUE(retval))
>  		goto free_out;
>  
>  	retval = debugfs_create_file("rcuhier", 0444, rcudir,
>  						NULL, &rcuhier_fops);
> -	if (!retval)
> +	if (IS_ERR_VALUE(retval))
>  		goto free_out;
>  
>  	retval = debugfs_create_file("rcu_pending", 0444, rcudir,
>  						NULL, &rcu_pending_fops);
> -	if (!retval)
> +	if (IS_ERR_VALUE(retval))
>  		goto free_out;
>  	return 0;
>  free_out:

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/