linux-kernel - Re: [PATCH v9 2/3] mmc: core: add random fault injection

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Date:	Tue, 13 Sep 2011 22:12:04 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Per Forlin <per.forlin@...ricsson.com>
Cc:	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linaro-dev@...ts.linaro.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Chris Ball <cjb@...top.org>, linux-doc@...r.kernel.org,
	Per Forlin <per.forlin@...aro.org>
Subject: Re: [PATCH v9 2/3] mmc: core: add random fault injection

2011/8/19 Per Forlin <per.forlin@...ricsson.com>:

> +#ifdef KERNEL
> +/*
> + * Internal function. Pass the boot param fail_mmc_request to
> + * the setup fault injection attributes routine.
> + */
> +static int __init setup_fail_mmc_request(char *str)
> +{
> +       return setup_fault_attr(&fail_mmc_request, str);
> +}
> +__setup("fail_mmc_request=", setup_fail_mmc_request);
> +#endif /* KERNEL */

You attempt to enable __setup() only when mmc_core is built into
the kernel.  Does it really work? I cannot find any drivers using
"KERNEL" macro.

You can use module_param_cb() instead of __setup() without #ifdef KERNEL.
When mmc_core is built into the kernel, you can specify the parameter
with "mmc_core.fail_mmc_request=..."

Sorry for pointing that out too late.
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