linux-kernel - Re: [PATCH 2/4] compat: backport work

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Message-ID: <1332245223.3329.5.camel@jlt3.sipsolutions.net>
Date:	Tue, 20 Mar 2012 13:07:03 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	"Luis R. Rodriguez" <mcgrof@...jolero.org>
Cc:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	lf_driver_backport@...ts.linux-foundation.org
Subject: Re: [PATCH 2/4] compat: backport work_busy()

On Mon, 2012-03-19 at 20:26 -0700, Luis R. Rodriguez wrote:
> From: "Luis R. Rodriguez" <mcgrof@...jolero.org>
> 
> Best we can do is just tell the users of we are WORK_BUSY_PENDING
> for older kernels. The ckmake log:

[...]

> + * Test whether @work is currently pending or running.  There is no
> + * synchronization around this function and the test result is
> + * unreliable and only useful as advisory hints or for debugging.
> + * Especially for reentrant wqs, the pending state might hide the
> + * running state.

What's this needed for? It seems if it's used only for hints/debugging
we should not need the function, or possibly simply return some
pointless combination like -1?

johannes

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