linux-kernel - Re: [PATCH 06/15] driver model: anti-oopsing medicine

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Message-Id: <200808211124.22485.david-b@pacbell.net>
Date:	Thu, 21 Aug 2008 11:24:22 -0700
From:	David Brownell <david-b@...bell.net>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/15] driver model: anti-oopsing medicine

On Thursday 21 August 2008, Greg Kroah-Hartman wrote:
> +       if (!class->p) {
> +               WARN(1, "%s called for class '%s' before it was initialized",
> +                    __func__, class->name);
> +               return -EINVAL;
> +       }

Or -- for future reference -- using WARN() with non-constant
initial parameter:

	if (WARN(!class-p, "%s called ...\n" ...))
		return -EINVAL;

Some of those macros now have return values, supportin C code
that looks a bit more compact.

- Dave
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