Re: powerpc/rtas: Introduce rtas_get_sensor_fast() for IRQ handlers
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2015-07-22 11:25:27
On Fri, 2015-17-07 at 10:46:58 UTC, Thomas Huth wrote:
The EPOW interrupt handler uses rtas_get_sensor(), which in turn uses rtas_busy_delay() to wait for RTAS becoming ready in case it is necessary. But rtas_busy_delay() is annotated with might_sleep() and thus may not be used by interrupts handlers like the EPOW handler! This leads to the following BUG when CONFIG_DEBUG_ATOMIC_SLEEP is enabled:
When did we break this? cheers