kernel: timeout: detect inactive timeouts using dnode linked state
Whether a timeout is linked into the timeout queue can be determined
from the corresponding sys_dnode_t linked state. This removes the need
to use a special flag value in dticks to determine that the timeout is
inactive.
Update _abort_timeout to return an error code, rather than the flag
value, when the timeout to be aborted was not active.
Remove the _INACTIVE flag value, and replace its external uses with an
internal API function that checks whether a timeout is inactive.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
6 files changed
