linux-kernel - Re: [JANITOR PROPOSAL] Switch ioctl functions to ->unlocked

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Message-ID: <20080111083345.GA3863@ucw.cz>
Date:	Fri, 11 Jan 2008 08:33:45 +0000
From:	Pavel Machek <pavel@....cz>
To:	Paolo Ciarrocchi <paolo.ciarrocchi@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, gorcunov@...il.com
Subject: Re: [JANITOR PROPOSAL] Switch ioctl functions to ->unlocked_ioctl


> Hi Andi,
> I grepped and tried to do what you suggested.
> The first file that git grep reported was:
> arch/arm/common/rtctime.c:static const struct file_operations rtc_fops = {
> 
> So I cooked up the following patch (probably mangled, just to give you
> a rough idea of what I did):
> diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
> index bf1075e..19dedb5 100644
> --- a/arch/arm/common/rtctime.c
> +++ b/arch/arm/common/rtctime.c
> @@ -189,13 +189,16 @@ static int rtc_ioctl(struct inode *inode, struct
> file *file, unsigned int cmd,
>  		if (ret)
>  			break;
>  		ret = copy_to_user(uarg, &alrm.time, sizeof(tm));
> -		if (ret)
> +		if (ret) {
> +			unlock_kernel();
>  			ret = -EFAULT;
> +		}
>  		break;

Just put unlock kernel near return ret;...

-- 
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