tree fec12d0daf2fadea20cce426118fbb560bd6fb41
parent 5dacbbef3d29598dcb6ecf747a7dae4fbb4ce039
author Max Filippov <jcmvbkbc@gmail.com> 1543278651 -0800
committer Max Filippov <jcmvbkbc@gmail.com> 1543961303 -0800

xtensa: don't clear cpenable unconditionally on release

Clearing cpenable special register for a task without changing
coprocessor owner for the coprocessors that were enabled will result in
coprocessor context flush and immediate reload at the next attempt to
access this coprocessor if it happens before the context switch.
Avoid it by only clearing cpenable special register if
coprocessor_release_all is called for the current task.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>