Nathan Lynch writes:
> Michael Ellerman writes:
>> Nathan Lynch via B4 Submission Endpoint
>> writes:
...
>>> +struct rtas_work_area * __ref rtas_work_area_alloc(size_t size)
>>> +{
>>> + struct rtas_work_area *area;
>>> + unsigned long addr;
>>> +
>>> + might_sleep();
>>> +
>>> + WARN_O
Michael Ellerman writes:
> Nathan Lynch via B4 Submission Endpoint
> writes:
>> diff --git a/arch/powerpc/include/asm/rtas-work-area.h
>> b/arch/powerpc/include/asm/rtas-work-area.h
>> new file mode 100644
>> index ..76ccb039cc37
>> --- /dev/null
>> +++ b/arch/powerpc/include/asm/rta
Nathan Lynch via B4 Submission Endpoint
writes:
> diff --git a/arch/powerpc/include/asm/rtas-work-area.h
> b/arch/powerpc/include/asm/rtas-work-area.h
> new file mode 100644
> index ..76ccb039cc37
> --- /dev/null
> +++ b/arch/powerpc/include/asm/rtas-work-area.h
> @@ -0,0 +1,45 @@
> +
From: Nathan Lynch
Most callers of RTAS functions that take a temporary "work area"
parameter use the statically allocated rtas_data_buf buffer as the
argument. This buffer is protected by a global spinlock. So users of
rtas_data_buf cannot perform sleeping operations while accessing the
buffer.
