linux-kernel - Re: [RFC PATCH 1/2] tee: generic TEE subsystem

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Date:	Sat, 18 Apr 2015 10:55:50 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Jens Wiklander <jens.wiklander@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	javier@...igon.com, Herbert Xu <herbert@...dor.apana.org.au>,
	tpmdd-devel@...ts.sourceforge.net, valentin.manea@...wei.com,
	jean-michel.delorme@...com, emmanuel.michel@...com
Subject: Re: [RFC PATCH 1/2] tee: generic TEE subsystem

On Fri, Apr 17, 2015 at 09:50:56AM +0200, Jens Wiklander wrote:
> +/**
> + * struct tee_cmd_data - Opaque command argument
> + * @buf_ptr:	[in] A __user pointer to a command buffer
> + * @buf_len:	[in] Length of the buffer above
> + *
> + * Opaque command data which is passed on to the specific driver. The command
> + * buffer doesn't have to reside in shared memory.
> + * Used as argument for TEE_IOC_CMD below.
> + */
> +struct tee_ioctl_cmd_data {
> +	uint64_t buf_ptr;
> +	uint64_t buf_len;
> +};

All structures that cross the user/kernel boundry must use the __
variant of variable names.  So for this one, it must be __u64.

Same for all of your ioctl structures.

thanks,

greg k-h
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