linux-kernel - Re: [PATCH v7 3.2-rc2 3/30] uprobes: register/unregister probes.

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Message-ID: <1322066106.14799.84.camel@twins>
Date:	Wed, 23 Nov 2011 17:35:06 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-mm <linux-mm@...ck.org>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <andi@...stfloor.org>,
	Christoph Hellwig <hch@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Roland McGrath <roland@...k.frob.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Anton Arapov <anton@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Stephen Wilson <wilsons@...rt.ca>
Subject: Re: [PATCH v7 3.2-rc2 3/30] uprobes: register/unregister probes.

On Fri, 2011-11-18 at 16:37 +0530, Srikar Dronamraju wrote:
> +#define UPROBES_HASH_SZ        13
> +/* serialize (un)register */
> +static struct mutex uprobes_mutex[UPROBES_HASH_SZ];
> +#define uprobes_hash(v)        (&uprobes_mutex[((unsigned long)(v)) %\
> +                                               UPROBES_HASH_SZ]) 

Was there any reason to for using this hasing scheme, say over hash.h?
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