diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-06 06:26:16 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-06 06:26:16 +0300 |
commit | 11d8ec408d0aa2dae7ca89f95e497b8f22427b20 (patch) | |
tree | 88e7a8c08437f0bcaa747fc40c68604eb26fd431 /drivers/base | |
parent | 39fada55274241d50e27eb961cc9280b5b6121fb (diff) | |
parent | e2b3b80de5cda284c885721e873f9a6e90f68ef8 (diff) | |
download | linux-11d8ec408d0aa2dae7ca89f95e497b8f22427b20.tar.xz |
Merge tag 'pm-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"A few more fixes and cleanups in the x86-64 low-level hibernation
code, PM core, cpufreq (Kconfig and intel_pstate), and the operating
points framework.
Specifics:
- Prevent the low-level assembly hibernate code on x86-64 from
referring to __PAGE_OFFSET directly as a symbol which doesn't work
when the kernel identity mapping base is randomized, in which case
__PAGE_OFFSET is a variable (Rafael Wysocki).
- Avoid selecting CPU_FREQ_STAT by default as the statistics are not
required for proper cpufreq operation (Borislav Petkov).
- Add Skylake-X and Broadwell-X IDs to the intel_pstate's list of
processors where out-of-band (OBB) control of P-states is possible
and if that is in use, intel_pstate should not attempt to manage
P-states (Srinivas Pandruvada).
- Drop some unnecessary checks from the wakeup IRQ handling code in
the PM core (Markus Elfring).
- Reduce the number operating performance point (OPP) lookups in one
of the OPP framework's helper functions (Jisheng Zhang)"
* tag 'pm-extra-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
x86/power/64: Do not refer to __PAGE_OFFSET from assembly code
cpufreq: Do not default-yes CPU_FREQ_STAT
cpufreq: intel_pstate: Add more out-of-band IDs
PM / OPP: optimize dev_pm_opp_set_rate() performance a bit
PM-wakeup: Delete unnecessary checks before three function calls
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/power/opp/core.c | 31 | ||||
-rw-r--r-- | drivers/base/power/wakeup.c | 18 |
2 files changed, 26 insertions, 23 deletions
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c index 7c04c87738a6..df0c70963d9e 100644 --- a/drivers/base/power/opp/core.c +++ b/drivers/base/power/opp/core.c @@ -402,6 +402,22 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, } EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact); +static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table, + unsigned long *freq) +{ + struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); + + list_for_each_entry_rcu(temp_opp, &opp_table->opp_list, node) { + if (temp_opp->available && temp_opp->rate >= *freq) { + opp = temp_opp; + *freq = opp->rate; + break; + } + } + + return opp; +} + /** * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq * @dev: device for which we do this operation @@ -427,7 +443,6 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, unsigned long *freq) { struct opp_table *opp_table; - struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); opp_rcu_lockdep_assert(); @@ -440,15 +455,7 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, if (IS_ERR(opp_table)) return ERR_CAST(opp_table); - list_for_each_entry_rcu(temp_opp, &opp_table->opp_list, node) { - if (temp_opp->available && temp_opp->rate >= *freq) { - opp = temp_opp; - *freq = opp->rate; - break; - } - } - - return opp; + return _find_freq_ceil(opp_table, freq); } EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil); @@ -612,7 +619,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) return PTR_ERR(opp_table); } - old_opp = dev_pm_opp_find_freq_ceil(dev, &old_freq); + old_opp = _find_freq_ceil(opp_table, &old_freq); if (!IS_ERR(old_opp)) { ou_volt = old_opp->u_volt; ou_volt_min = old_opp->u_volt_min; @@ -622,7 +629,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) __func__, old_freq, PTR_ERR(old_opp)); } - opp = dev_pm_opp_find_freq_ceil(dev, &freq); + opp = _find_freq_ceil(opp_table, &freq); if (IS_ERR(opp)) { ret = PTR_ERR(opp); dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index 5fb7718f256c..62e4de2aa8d1 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -334,10 +334,9 @@ void device_wakeup_arm_wake_irqs(void) struct wakeup_source *ws; rcu_read_lock(); - list_for_each_entry_rcu(ws, &wakeup_sources, entry) { - if (ws->wakeirq) - dev_pm_arm_wake_irq(ws->wakeirq); - } + list_for_each_entry_rcu(ws, &wakeup_sources, entry) + dev_pm_arm_wake_irq(ws->wakeirq); + rcu_read_unlock(); } @@ -351,10 +350,9 @@ void device_wakeup_disarm_wake_irqs(void) struct wakeup_source *ws; rcu_read_lock(); - list_for_each_entry_rcu(ws, &wakeup_sources, entry) { - if (ws->wakeirq) - dev_pm_disarm_wake_irq(ws->wakeirq); - } + list_for_each_entry_rcu(ws, &wakeup_sources, entry) + dev_pm_disarm_wake_irq(ws->wakeirq); + rcu_read_unlock(); } @@ -390,9 +388,7 @@ int device_wakeup_disable(struct device *dev) return -EINVAL; ws = device_wakeup_detach(dev); - if (ws) - wakeup_source_unregister(ws); - + wakeup_source_unregister(ws); return 0; } EXPORT_SYMBOL_GPL(device_wakeup_disable); |