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| author | Len Brown <len.brown@intel.com> | 2015-05-27 17:11:37 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2015-07-26 12:43:45 -0400 |
| commit | 7dd0e0af64afe4aa08ccdd167f64bd007f09b515 (patch) | |
| tree | f09c6ef7092df934e512aaf1ef2fd628c9f91fff | |
| parent | 26ae19a3883c9d595e9100fd10b856a7cf1a949a (diff) | |
| download | lwn-7dd0e0af64afe4aa08ccdd167f64bd007f09b515.tar.gz lwn-7dd0e0af64afe4aa08ccdd167f64bd007f09b515.zip | |
intel_idle: allow idle states to be freeze-mode specific
intel_idle uses a NULL "enter" field in a cpuidle state
to recognize the invalid entry terminating a variable-length array.
Linux-4.0 added support for the system-wide "freeze" state
in cpuidle drivers via the new "enter_freeze" field.
The natural way to expose a deep idle state for freeze,
but not for run-time idle is to supply "enter_freeze" without "enter";
so we update the driver to accept such states.
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/idle/intel_idle.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 2a36a95d95cf..008e943d224d 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -965,7 +965,8 @@ static int __init intel_idle_cpuidle_driver_init(void) for (cstate = 0; cstate < CPUIDLE_STATE_MAX; ++cstate) { int num_substates, mwait_hint, mwait_cstate; - if (cpuidle_state_table[cstate].enter == NULL) + if ((cpuidle_state_table[cstate].enter == NULL) && + (cpuidle_state_table[cstate].enter_freeze == NULL)) break; if (cstate + 1 > max_cstate) { |