Messages in this thread | | | From | "Ren, Qiaowei" <> | Subject | RE: [PATCH v8 04/10] x86, mpx: hook #BR exception handler to allocate bound tables | Date | Sat, 13 Sep 2014 07:24:02 +0000 |
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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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