On Wed, 19 Feb 2014 16:55:05 -0500 Dave Jones <da...@redhat.com> wrote:

> On Wed, Feb 19, 2014 at 01:40:25PM -0800, Andrew Morton wrote:
>  
>  > Switching `make_it_fail' to unsigned makes the test simpler but it does
>  > rather muck up the typing in there.  task_struct.make_it_fail is still
>  > an int, we should now use simple_strtoul rather than simple_strtol,
>  > proc_fault_inject_read()'s snprintf() should now use %u, etc.  None of
>  > which actually matters, but still...
>  
> I toyed with the idea of changing task_struct.make_it_fail to unsigned too,
> but only realized I missed that after I'd sent out the diff.

If we're touching the task_struct we could make it a bool.

Or just a single bit(field).  task_struct already has a bunch of
bitfields in it (strangely, they aren't contiguous).  But some locking
would be needed if tasks-other-than-current can modify the bit.

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