From mboxrd@z Thu Jan 1 00:00:00 1970 From: Trinabh Gupta Date: Wed, 20 Apr 2011 06:56:32 +0000 Subject: [RFC PATCH V3 2/4] cpuidle: Remove CPUIDLE_FLAG_IGNORE and Message-Id: <20110420065542.332.76633.stgit@tringupt.in.ibm.com> List-Id: References: <20110420065445.332.13688.stgit@tringupt.in.ibm.com> In-Reply-To: <20110420065445.332.13688.stgit@tringupt.in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: arjan@linux.intel.com, peterz@infradead.org, lenb@kernel.org, venki@google.com, ak@linux.intel.com, len.brown@intel.com Cc: linux-kernel@vger.kernel.org, linux-pm@lists.linux-foundation.org, linux-sh@vger.kernel.org, linux-arm-kernel@lists.infradead.org, davinci-linux-open-source@linux.davincidsp.com, linux-omap@vger.kernel.org, linux-acpi@vger.kernel.org The cpuidle_device->prepare() mechanism causes updates to the cpuidle_state[].flags, setting and clearing CPUIDLE_FLAG_IGNORE to tell the governor not to chose a state on a per-cpu basis at run-time. State demotion is now handled by the driver and it returns the actual state entered. Hence, this mechanism is not required. Also this removes per-cpu flags from cpuidle_state enabling it to be made global. Signed-off-by: Trinabh Gupta --- drivers/cpuidle/cpuidle.c | 10 ---------- drivers/cpuidle/governors/menu.c | 2 -- include/linux/cpuidle.h | 3 --- 3 files changed, 0 insertions(+), 15 deletions(-) diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 355b078..92a6216 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -75,16 +75,6 @@ static void cpuidle_idle_call(void) hrtimer_peek_ahead_timers(); #endif - /* - * Call the device's prepare function before calling the - * governor's select function. ->prepare gives the device's - * cpuidle driver a chance to update any dynamic information - * of its cpuidle states for the current idle period, e.g. - * state availability, latencies, residencies, etc. - */ - if (dev->prepare) - dev->prepare(dev); - /* ask the governor for the next state */ next_state = cpuidle_curr_governor->select(dev); if (need_resched()) { diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index 70d9982..40b5630 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -286,8 +286,6 @@ static int menu_select(struct cpuidle_device *dev) for (i = CPUIDLE_DRIVER_STATE_START; i < dev->state_count; i++) { struct cpuidle_state *s = &dev->states[i]; - if (s->flags & CPUIDLE_FLAG_IGNORE) - continue; if (s->target_residency > data->predicted_us) continue; if (s->exit_latency > latency_req) diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 45eef60..a3306be 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -47,7 +47,6 @@ struct cpuidle_state { /* Idle State Flags */ #define CPUIDLE_FLAG_TIME_VALID (0x01) /* is residency time measurable? */ -#define CPUIDLE_FLAG_IGNORE (0x100) /* ignore during this idle period */ #define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000) @@ -93,8 +92,6 @@ struct cpuidle_device { struct completion kobj_unregister; void *governor_data; int safe_state_index; - - int (*prepare) (struct cpuidle_device *dev); }; DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);