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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rafael Wysocki <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
	linux-pm@vger.kernel.org,
	Vincent Guittot <vincent.guittot@linaro.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH V2 2/5] cpufreq: Replace few CPUFREQ_CONST_LOOPS checks with has_target()
Date: Thu, 20 Jun 2019 08:35:47 +0530	[thread overview]
Message-ID: <88da7cfabad5e19a361fe2843e5ef547d50fd221.1560999838.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1560999838.git.viresh.kumar@linaro.org>

CPUFREQ_CONST_LOOPS was introduced in a very old commit from pre-2.6
kernel release commit 6a4a93f9c0d5 ("[CPUFREQ] Fix 'out of sync'
issue").

Probably the initial idea was to just avoid these checks for set_policy
type drivers and then things got changed over the years. And it is very
unclear why these checks are there at all.

Replace the CPUFREQ_CONST_LOOPS check with has_target(), which makes
more sense now.

cpufreq_notify_transition() is only called for has_target() type driver
and not for set_policy type, and the check is simply redundant. Remove
it as well.

Also remove () around freq comparison statement as they aren't required
and checkpatch also warns for them.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/cpufreq.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 54befd775bd6..41ac701e324f 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -359,12 +359,10 @@ static void cpufreq_notify_transition(struct cpufreq_policy *policy,
 		 * which is not equal to what the cpufreq core thinks is
 		 * "old frequency".
 		 */
-		if (!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
-			if (policy->cur && (policy->cur != freqs->old)) {
-				pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n",
-					 freqs->old, policy->cur);
-				freqs->old = policy->cur;
-			}
+		if (policy->cur && policy->cur != freqs->old) {
+			pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n",
+				 freqs->old, policy->cur);
+			freqs->old = policy->cur;
 		}
 
 		srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
@@ -1618,8 +1616,7 @@ static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
 	if (policy->fast_switch_enabled)
 		return ret_freq;
 
-	if (ret_freq && policy->cur &&
-		!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
+	if (has_target() && ret_freq && policy->cur) {
 		/* verify no discrepancy between actual and
 					saved value exists */
 		if (unlikely(ret_freq != policy->cur)) {
-- 
2.21.0.rc0.269.g1a574e7a288b


  parent reply	other threads:[~2019-06-20  3:06 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-20  3:05 [PATCH V2 0/5] cpufreq: cleanups Viresh Kumar
2019-06-20  3:05 ` [PATCH V2 1/5] cpufreq: Remove the redundant !setpolicy check Viresh Kumar
2019-06-27 21:52   ` Rafael J. Wysocki
2019-06-20  3:05 ` Viresh Kumar [this message]
2019-06-27  5:00   ` [PATCH V2 2/5] cpufreq: Replace few CPUFREQ_CONST_LOOPS checks with has_target() Viresh Kumar
2019-06-27  9:52     ` Rafael J. Wysocki
2019-06-28  5:16   ` [PATCH V3 2/5] cpufreq: Don't skip frequency validation for has_target() drivers Viresh Kumar
2019-06-20  3:05 ` [PATCH V2 3/5] cpufreq: Use has_target() instead of !setpolicy Viresh Kumar
2019-06-27 21:52   ` Rafael J. Wysocki
2019-06-20  3:05 ` [PATCH V2 4/5] cpufreq: Reuse cpufreq_update_current_freq() in __cpufreq_get() Viresh Kumar
2019-06-20  3:05 ` [PATCH V2 5/5] cpufreq: Avoid calling cpufreq_verify_current_freq() from handle_update() Viresh Kumar

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