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To:     linux-kernel@vger.kernel.org, x86@kernel.org,
        linux-sgx@vger.kernel.org,
        "Jarkko Sakkinen" <jarkko.sakkinen@linux.intel.com>
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        "Suresh Siddha" <suresh.b.siddha@intel.com>
Subject: Re: [PATCH v24 12/24] x86/sgx: Linux Enclave Driver
Reply-To: haitao.huang@linux.intel.com
References: <20191129231326.18076-1-jarkko.sakkinen@linux.intel.com>
 <20191129231326.18076-13-jarkko.sakkinen@linux.intel.com>
Date:   Mon, 02 Dec 2019 09:48:43 -0600
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From:   "Haitao Huang" <haitao.huang@linux.intel.com>
Organization: Intel
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On Fri, 29 Nov 2019 17:13:14 -0600, Jarkko Sakkinen  
<jarkko.sakkinen@linux.intel.com> wrote:


> +
> +	for (c = 0 ; c < addp.length; c += PAGE_SIZE) {
> +		if (signal_pending(current)) {
> +			ret = -ERESTARTSYS;
> +			break;
> +		}

This IOC is not idempotent as pages EADDed at this point can not be  
re-EADDed again. So we can't return ERESTARTSYS

Haitao