linux-kernel - Re: [PATCH] plist: add mutex to the blessed lock type for plists

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Message-ID: <m2tyb81jml.fsf@firstfloor.org>
Date:	Wed, 29 Jun 2011 13:13:22 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Dima Zavin <dima@...roid.com>
Cc:	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] plist: add mutex to the blessed lock type for plists

Dima Zavin <dima@...roid.com> writes:

> Currently, plist debugging "enforces" that the plist is locked
> with either a raw_spinlock or a spinlock. The plist data structure
> is useful in other places, where spinlocks are unnecessary.
>
> Extend the plist initializers and debug checks to allow the plist
> to be protected by a mutex

Seems really ugly and clearly not a godo path. 

It's a bit like adding a 11th argument to a function which already has 
10.

Perhaps better move out the locking completely to wrappers and remove
the knowledge from the core plist code.

-Andi


-- 
ak@...ux.intel.com -- Speaking for myself only
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