Date: Sat, 18 Apr 2015 10:55:50 +0200
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Jens Wiklander <jens.wiklander@linaro.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        devicetree@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
        javier@javigon.com, Herbert Xu <herbert@gondor.apana.org.au>,
        tpmdd-devel@lists.sourceforge.net, valentin.manea@huawei.com,
        jean-michel.delorme@st.com, emmanuel.michel@st.com
Subject: Re: [RFC PATCH 1/2] tee: generic TEE subsystem
Message-ID: <20150418085550.GA29858@kroah.com>
References: <1429257057-7935-1-git-send-email-jens.wiklander@linaro.org>
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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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