linux-kernel - Re: RFC: Boiler plate functions for ida / idr allocation?

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20110713133139.GO2872@htj.dyndns.org>
Date:	Wed, 13 Jul 2011 15:31:39 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: RFC: Boiler plate functions for ida / idr allocation?

(cc'ing Rusty Russell)
Hello,

On Wed, Jul 13, 2011 at 10:44:32AM +0100, Jonathan Cameron wrote:
> The other thing this highlights is that I suspect quite a few are protected by
> spin locks when a mutex would be fine. Hence that might be worth tidying up first.
> 
> Anyhow, a cleanup worth making? (obviously the exact form needs some work, but
> I think the following is enough to start a discussion!)
> 
> Subject: [PATCH] ida utility function

Rusty suggested similar addition some weeks ago, so people are really
getting annoyed by this.

  http://thread.gmane.org/gmane.linux.kernel/1148513/focus=74236

Here's an interface that I think should work,

	int ida_get(struct ida *ida, int begin, int end, gfp_t gfp);

It uses an internal spinlock, returns the allocated ID and @end <= 0
indicates no limit.

Thanks.

-- 
tejun
--
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/