On Fri, 2017-11-03 at 11:02 -0700, Andrew Morton wrote:
> Also, checkpatch says
>
> WARNING: use of in_atomic() is incorrect outside core kernel code
> #43: FILE: mm/memory.c:4491:
> + if (in_atomic())
>
> I don't recall why we did that, but perhaps this should be revisited?
Is the comment above in_atomic() still up-to-date? From <linux/preempt.h>:
/*
* Are we running in atomic context? WARNING: this macro cannot
* always detect atomic context; in particular, it cannot know about
* held spinlocks in non-preemptible kernels. Thus it should not be
* used in the general case to determine whether sleeping is possible.
* Do not use in_atomic() in driver code.
*/
#define in_atomic() (preempt_count() != 0)
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