RE: [PATCH v8 04/10] x86, mpx: hook #BR exception handler to allocate bound tables

[Ren, Qiaowei]

On 2014-09-13, Hansen, Dave wrote:
> On 09/11/2014 01:46 AM, Qiaowei Ren wrote:
>> +static int allocate_bt(long __user *bd_entry) {
>> +	unsigned long bt_addr, old_val = 0;
>> +	int ret = 0;
>> +
>> +	bt_addr = mpx_mmap(MPX_BT_SIZE_BYTES);
>> +	if (IS_ERR((void *)bt_addr))
>> +		return bt_addr;
>> +	bt_addr = (bt_addr & MPX_BT_ADDR_MASK) |
> MPX_BD_ENTRY_VALID_FLAG;
> 
> Qiaowei, why do we need the "& MPX_BT_ADDR_MASK" here?

It should be not necessary, and can be removed.

Thanks,
Qiaowei
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