Re: [PATCH v2 06/35] nds32: MMU fault handling and page table management

[Greentime Hu]

2017-12-08 0:40 GMT+08:00 Al Viro <viro@xxxxxxxxxxxxxxxxxx>:
> On Mon, Nov 27, 2017 at 08:27:53PM +0800, Greentime Hu wrote:
>> +void do_page_fault(unsigned long entry, unsigned long addr,
>> +                unsigned int error_code, struct pt_regs *regs)
> [snip]
>> +     /*
>> +      * If we're in an interrupt or have no user
>> +      * context, we must not take the fault..
>> +      */
>> +     if (unlikely(in_atomic() || !mm))
>
> Broken.  in_atomic() is wrong here - it should be faulthandler_disabled().

Thanks.
I will include <linux/uaccess.h> and replace in_atomic() with
faulthandler_disabled()
I will fix it in the next version patch.