linux-kernel - Re: [PATCH v4 1/2] rcu: uninline rcu_lock_acquire() and rcu_lock

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: <20140701114138.GQ6758@twins.programming.kicks-ass.net>
Date:	Tue, 1 Jul 2014 13:41:38 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] rcu: uninline rcu_lock_acquire() and
 rcu_lock_release()

On Mon, Jun 30, 2014 at 06:18:49PM +0200, Oleg Nesterov wrote:
> +static inline void __rcu_lock_acquire(struct lockdep_map *map, unsigned long ip)
>  {
> +	lock_acquire(map, 0, 0, 2, 0, NULL, ip);
>  }

> +extern void rcu_lock_acquire(void);
> +extern void rcu_lock_release(void);
> +extern void rcu_lock_acquire_bh(void);
> +extern void rcu_lock_release_bh(void);
> +extern void rcu_lock_acquire_sched(void);
> +extern void rcu_lock_release_sched(void);

> diff --git a/include/linux/srcu.h b/include/linux/srcu.h
> index a2783cb..5c06289 100644
> --- a/include/linux/srcu.h
> +++ b/include/linux/srcu.h
> @@ -219,7 +219,7 @@ static inline int srcu_read_lock(struct srcu_struct *sp) __acquires(sp)
>  {
>  	int retval = __srcu_read_lock(sp);
>  
> -	rcu_lock_acquire(&(sp)->dep_map);
> +	__rcu_lock_acquire(&(sp)->dep_map, _THIS_IP_);
>  	return retval;
>  }

Would an srcu_lock_acquire() not make sense here?

In any case, not wrong per se, just a consistency thing that stood out.

Content of type "application/pgp-signature" skipped