[PATCH v2 00/13] Rid W=1 warnings in CPUFreq

[PATCH v2 00/13] Rid W=1 warnings in CPUFreq

[Lee Jones]

This set is part of a larger effort attempting to clean-up W=1
kernel builds, which are currently overwhelmingly riddled with
niggly little warnings.

After these patches are applied, the build system no longer
complains about any W=0 nor W=1 level warnings in drivers/cpufreq.

Hurrah!

Changelog

v1 => v2:
 - Collect *-bys
 - Use __maybe_unused instead of removing device IDs
 - Use __always_unused instead of using unused variables
 - Include architecture header instead of creating new include file

Lee Jones (13):
  cpufreq: freq_table: Demote obvious misuse of kerneldoc to standard
    comment blocks
  cpufreq: cpufreq: Demote lots of function headers unworthy of
    kerneldoc status
  cpufreq: cpufreq_governor: Demote store_sampling_rate() header to
    standard comment block
  cpufreq: sti-cpufreq: Fix some formatting and misspelling issues
  cpufreq: pasemi: Include header file for {check,restore}_astate
    prototypes
  cpufreq: powernv-cpufreq: Functions only used in call-backs should be
    static
  cpufreq: powernv-cpufreq: Fix a bunch of kerneldoc related issues
  cpufreq: acpi-cpufreq: Mark 'dummy' variable as __always_unused
  cpufreq: acpi-cpufreq: Mark sometimes used ID structs as
    __maybe_unused
  cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as
    __always_unused
  cpufreq: pcc-cpufreq: Mark sometimes used ID structs as __maybe_unused
  cpufreq: intel_pstate: Supply struct attribute description for
    get_aperf_mperf_shift()
  cpufreq: amd_freq_sensitivity: Mark sometimes used ID structs as
    __maybe_unused

 drivers/cpufreq/acpi-cpufreq.c         |  8 +++----
 drivers/cpufreq/amd_freq_sensitivity.c |  2 +-
 drivers/cpufreq/cpufreq.c              | 32 ++++++++++++++------------
 drivers/cpufreq/cpufreq_governor.c     |  2 +-
 drivers/cpufreq/freq_table.c           |  6 ++---
 drivers/cpufreq/intel_pstate.c         |  2 ++
 drivers/cpufreq/pasemi-cpufreq.c       |  2 ++
 drivers/cpufreq/pcc-cpufreq.c          |  2 +-
 drivers/cpufreq/powernow-k8.c          |  4 ++--
 drivers/cpufreq/powernv-cpufreq.c      | 15 ++++++------
 drivers/cpufreq/sti-cpufreq.c          |  8 +++----
 11 files changed, 45 insertions(+), 38 deletions(-)

-- 
2.25.1

[PATCH v2 01/13] cpufreq: freq_table: Demote obvious misuse of kerneldoc to standard comment blocks

[Lee Jones]

No attempt has been made to document any of the demoted functions here.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/freq_table.c:229: warning: Function parameter or member 'policy' not described in 'show_available_freqs'
 drivers/cpufreq/freq_table.c:229: warning: Function parameter or member 'buf' not described in 'show_available_freqs'
 drivers/cpufreq/freq_table.c:229: warning: Function parameter or member 'show_boost' not described in 'show_available_freqs'
 drivers/cpufreq/freq_table.c:269: warning: Function parameter or member 'policy' not described in 'scaling_available_frequencies_show'
 drivers/cpufreq/freq_table.c:269: warning: Function parameter or member 'buf' not described in 'scaling_available_frequencies_show'
 drivers/cpufreq/freq_table.c:281: warning: Function parameter or member 'policy' not described in 'scaling_boost_frequencies_show'
 drivers/cpufreq/freq_table.c:281: warning: Function parameter or member 'buf' not described in 'scaling_boost_frequencies_show'

Cc: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/freq_table.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index e117b0059123e..f839dc9852c08 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -221,7 +221,7 @@ int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
 
-/**
+/*
  * show_available_freqs - show available frequencies for the specified CPU
  */
 static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
@@ -260,7 +260,7 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
 struct freq_attr cpufreq_freq_attr_##_name##_freqs =     \
 __ATTR_RO(_name##_frequencies)
 
-/**
+/*
  * show_scaling_available_frequencies - show available normal frequencies for
  * the specified CPU
  */
@@ -272,7 +272,7 @@ static ssize_t scaling_available_frequencies_show(struct cpufreq_policy *policy,
 cpufreq_attr_available_freq(scaling_available);
 EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
 
-/**
+/*
  * show_available_boost_freqs - show available boost frequencies for
  * the specified CPU
  */
-- 
2.25.1

[PATCH v2 02/13] cpufreq: cpufreq: Demote lots of function headers unworthy of kerneldoc status

[Lee Jones]

Also provide missing function parameter description for 'cpu' and 'policy'.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/cpufreq.c:60: warning: cannot understand function prototype: 'struct cpufreq_driver *cpufreq_driver; '
 drivers/cpufreq/cpufreq.c:90: warning: Function parameter or member 'cpufreq_policy_notifier_list' not described in 'BLOCKING_NOTIFIER_HEAD'
 drivers/cpufreq/cpufreq.c:312: warning: Function parameter or member 'val' not described in 'adjust_jiffies'
 drivers/cpufreq/cpufreq.c:312: warning: Function parameter or member 'ci' not described in 'adjust_jiffies'
 drivers/cpufreq/cpufreq.c:538: warning: Function parameter or member 'policy' not described in 'cpufreq_driver_resolve_freq'
 drivers/cpufreq/cpufreq.c:686: warning: Function parameter or member 'file_name' not described in 'show_one'
 drivers/cpufreq/cpufreq.c:686: warning: Function parameter or member 'object' not described in 'show_one'
 drivers/cpufreq/cpufreq.c:731: warning: Function parameter or member 'file_name' not described in 'store_one'
 drivers/cpufreq/cpufreq.c:731: warning: Function parameter or member 'object' not described in 'store_one'
 drivers/cpufreq/cpufreq.c:741: warning: Function parameter or member 'policy' not described in 'show_cpuinfo_cur_freq'
 drivers/cpufreq/cpufreq.c:741: warning: Function parameter or member 'buf' not described in 'show_cpuinfo_cur_freq'
 drivers/cpufreq/cpufreq.c:754: warning: Function parameter or member 'policy' not described in 'show_scaling_governor'
 drivers/cpufreq/cpufreq.c:754: warning: Function parameter or member 'buf' not described in 'show_scaling_governor'
 drivers/cpufreq/cpufreq.c:770: warning: Function parameter or member 'policy' not described in 'store_scaling_governor'
 drivers/cpufreq/cpufreq.c:770: warning: Function parameter or member 'buf' not described in 'store_scaling_governor'
 drivers/cpufreq/cpufreq.c:770: warning: Function parameter or member 'count' not described in 'store_scaling_governor'
 drivers/cpufreq/cpufreq.c:806: warning: Function parameter or member 'policy' not described in 'show_scaling_driver'
 drivers/cpufreq/cpufreq.c:806: warning: Function parameter or member 'buf' not described in 'show_scaling_driver'
 drivers/cpufreq/cpufreq.c:815: warning: Function parameter or member 'policy' not described in 'show_scaling_available_governors'
 drivers/cpufreq/cpufreq.c:815: warning: Function parameter or member 'buf' not described in 'show_scaling_available_governors'
 drivers/cpufreq/cpufreq.c:859: warning: Function parameter or member 'policy' not described in 'show_related_cpus'
 drivers/cpufreq/cpufreq.c:859: warning: Function parameter or member 'buf' not described in 'show_related_cpus'
 drivers/cpufreq/cpufreq.c:867: warning: Function parameter or member 'policy' not described in 'show_affected_cpus'
 drivers/cpufreq/cpufreq.c:867: warning: Function parameter or member 'buf' not described in 'show_affected_cpus'
 drivers/cpufreq/cpufreq.c:901: warning: Function parameter or member 'policy' not described in 'show_bios_limit'
 drivers/cpufreq/cpufreq.c:901: warning: Function parameter or member 'buf' not described in 'show_bios_limit'
 drivers/cpufreq/cpufreq.c:1625: warning: Function parameter or member 'dev' not described in 'cpufreq_remove_dev'
 drivers/cpufreq/cpufreq.c:1625: warning: Function parameter or member 'sif' not described in 'cpufreq_remove_dev'
 drivers/cpufreq/cpufreq.c:2380: warning: Function parameter or member 'cpu' not described in 'cpufreq_get_policy'
 drivers/cpufreq/cpufreq.c:2771: warning: Function parameter or member 'driver' not described in 'cpufreq_unregister_driver'

Cc: Dominik Brodowski <linux@brodo.de>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/cpufreq.c | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 036f4cc42ede2..17c1c3becd925 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -52,7 +52,7 @@ static LIST_HEAD(cpufreq_governor_list);
 
 static char default_governor[CPUFREQ_NAME_LEN];
 
-/**
+/*
  * The "cpufreq driver" - the arch- or hardware-dependent low
  * level driver of CPUFreq support, and its spinlock. This lock
  * also protects the cpufreq_cpu_data array.
@@ -80,7 +80,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
 			      struct cpufreq_governor *new_gov,
 			      unsigned int new_pol);
 
-/**
+/*
  * Two notifier lists: the "policy" list is involved in the
  * validation process for a new CPU frequency policy; the
  * "transition" list for kernel code that needs to handle
@@ -300,7 +300,7 @@ struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu)
  *            EXTERNALLY AFFECTING FREQUENCY CHANGES                 *
  *********************************************************************/
 
-/**
+/*
  * adjust_jiffies - adjust the system "loops_per_jiffy"
  *
  * This function alters the system "loops_per_jiffy" for the clock
@@ -526,6 +526,7 @@ EXPORT_SYMBOL_GPL(cpufreq_disable_fast_switch);
 /**
  * cpufreq_driver_resolve_freq - Map a target frequency to a driver-supported
  * one.
+ * @policy: associated policy to interrogate
  * @target_freq: target frequency to resolve.
  *
  * The target to driver frequency mapping is cached in the policy.
@@ -670,7 +671,7 @@ static struct cpufreq_governor *cpufreq_parse_governor(char *str_governor)
 	return get_governor(str_governor);
 }
 
-/**
+/*
  * cpufreq_per_cpu_attr_read() / show_##file_name() -
  * print out cpufreq information
  *
@@ -712,7 +713,7 @@ static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
 	return ret;
 }
 
-/**
+/*
  * cpufreq_per_cpu_attr_write() / store_##file_name() - sysfs write access
  */
 #define store_one(file_name, object)			\
@@ -733,7 +734,7 @@ static ssize_t store_##file_name					\
 store_one(scaling_min_freq, min);
 store_one(scaling_max_freq, max);
 
-/**
+/*
  * show_cpuinfo_cur_freq - current CPU frequency as detected by hardware
  */
 static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
@@ -747,7 +748,7 @@ static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
 	return sprintf(buf, "<unknown>\n");
 }
 
-/**
+/*
  * show_scaling_governor - show the current policy for the specified CPU
  */
 static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf)
@@ -762,7 +763,7 @@ static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf)
 	return -EINVAL;
 }
 
-/**
+/*
  * store_scaling_governor - store policy for the specified CPU
  */
 static ssize_t store_scaling_governor(struct cpufreq_policy *policy,
@@ -799,7 +800,7 @@ static ssize_t store_scaling_governor(struct cpufreq_policy *policy,
 	return ret ? ret : count;
 }
 
-/**
+/*
  * show_scaling_driver - show the cpufreq driver currently loaded
  */
 static ssize_t show_scaling_driver(struct cpufreq_policy *policy, char *buf)
@@ -807,7 +808,7 @@ static ssize_t show_scaling_driver(struct cpufreq_policy *policy, char *buf)
 	return scnprintf(buf, CPUFREQ_NAME_PLEN, "%s\n", cpufreq_driver->name);
 }
 
-/**
+/*
  * show_scaling_available_governors - show the available CPUfreq governors
  */
 static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy,
@@ -851,7 +852,7 @@ ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf)
 }
 EXPORT_SYMBOL_GPL(cpufreq_show_cpus);
 
-/**
+/*
  * show_related_cpus - show the CPUs affected by each transition even if
  * hw coordination is in use
  */
@@ -860,7 +861,7 @@ static ssize_t show_related_cpus(struct cpufreq_policy *policy, char *buf)
 	return cpufreq_show_cpus(policy->related_cpus, buf);
 }
 
-/**
+/*
  * show_affected_cpus - show the CPUs affected by each transition
  */
 static ssize_t show_affected_cpus(struct cpufreq_policy *policy, char *buf)
@@ -894,7 +895,7 @@ static ssize_t show_scaling_setspeed(struct cpufreq_policy *policy, char *buf)
 	return policy->governor->show_setspeed(policy, buf);
 }
 
-/**
+/*
  * show_bios_limit - show the current cpufreq HW/BIOS limitation
  */
 static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf)
@@ -1616,7 +1617,7 @@ static int cpufreq_offline(unsigned int cpu)
 	return 0;
 }
 
-/**
+/*
  * cpufreq_remove_dev - remove a CPU device
  *
  * Removes the cpufreq interface for a CPU device.
@@ -2373,6 +2374,7 @@ EXPORT_SYMBOL_GPL(cpufreq_unregister_governor);
  * cpufreq_get_policy - get the current cpufreq_policy
  * @policy: struct cpufreq_policy into which the current cpufreq_policy
  *	is written
+ * @cpu: CPU to find the policy for
  *
  * Reads the current cpufreq policy.
  */
@@ -2759,7 +2761,7 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 }
 EXPORT_SYMBOL_GPL(cpufreq_register_driver);
 
-/**
+/*
  * cpufreq_unregister_driver - unregister the current CPUFreq driver
  *
  * Unregister the current CPUFreq driver. Only call this if you have
-- 
2.25.1

[PATCH v2 03/13] cpufreq: cpufreq_governor: Demote store_sampling_rate() header to standard comment block

[Lee Jones]

There is no need for this to be denoted as kerneldoc.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/cpufreq_governor.c:46: warning: Function parameter or member 'attr_set' not described in 'store_sampling_rate'
 drivers/cpufreq/cpufreq_governor.c:46: warning: Function parameter or member 'buf' not described in 'store_sampling_rate'
 drivers/cpufreq/cpufreq_governor.c:46: warning: Function parameter or member 'count' not described in 'store_sampling_rate'

Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Jun Nakajima <jun.nakajima@intel.com>
Cc: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/cpufreq_governor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index f99ae45efaea7..63f7c219062b9 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -26,7 +26,7 @@ static DEFINE_PER_CPU(struct cpu_dbs_info, cpu_dbs);
 static DEFINE_MUTEX(gov_dbs_data_mutex);
 
 /* Common sysfs tunables */
-/**
+/*
  * store_sampling_rate - update sampling rate effective immediately if needed.
  *
  * If new rate is smaller than the old, simply updating
-- 
2.25.1

[PATCH v2 04/13] cpufreq: sti-cpufreq: Fix some formatting and misspelling issues

[Lee Jones]

Kerneldoc format for attribute descriptions should be '@.*: '.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/sti-cpufreq.c:49: warning: cannot understand function prototype: 'struct sti_cpufreq_ddata '

Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Pal Singh <ajitpal.singh@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/sti-cpufreq.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c
index 8f16bbb164b84..a5ad96d29adca 100644
--- a/drivers/cpufreq/sti-cpufreq.c
+++ b/drivers/cpufreq/sti-cpufreq.c
@@ -40,11 +40,11 @@ enum {
 };
 
 /**
- * ST CPUFreq Driver Data
+ * struct sti_cpufreq_ddata - ST CPUFreq Driver Data
  *
- * @cpu_node		CPU's OF node
- * @syscfg_eng		Engineering Syscon register map
- * @regmap		Syscon register map
+ * @cpu:		CPU's OF node
+ * @syscfg_eng:		Engineering Syscon register map
+ * @syscfg:		Syscon register map
  */
 static struct sti_cpufreq_ddata {
 	struct device *cpu;
-- 
2.25.1

[PATCH v2 05/13] cpufreq: pasemi: Include header file for {check,restore}_astate prototypes

[Lee Jones]

If function callers and providers do not share the same prototypes the
compiler complains of missing prototypes.  Fix this by including the
correct platforms header file.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/pasemi-cpufreq.c:109:5: warning: no previous prototype for ‘check_astate’ [-Wmissing-prototypes]
 109 | int check_astate(void)
 | ^~~~~~~~~~~~
 drivers/cpufreq/pasemi-cpufreq.c:114:6: warning: no previous prototype for ‘restore_astate’ [-Wmissing-prototypes]
 114 | void restore_astate(int cpu)
 | ^~~~~~~~~~~~~~

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Suggested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/pasemi-cpufreq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cpufreq/pasemi-cpufreq.c b/drivers/cpufreq/pasemi-cpufreq.c
index c66f566a854cb..815645170c4de 100644
--- a/drivers/cpufreq/pasemi-cpufreq.c
+++ b/drivers/cpufreq/pasemi-cpufreq.c
@@ -22,6 +22,8 @@
 #include <asm/time.h>
 #include <asm/smp.h>
 
+#include <platforms/pasemi/pasemi.h>
+
 #define SDCASR_REG		0x0100
 #define SDCASR_REG_STRIDE	0x1000
 #define SDCPWR_CFGA0_REG	0x0100
-- 
2.25.1

[PATCH v2 06/13] cpufreq: powernv-cpufreq: Functions only used in call-backs should be static

[Lee Jones]

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/powernv-cpufreq.c:669:6: warning: no previous prototype for ‘gpstate_timer_handler’ [-Wmissing-prototypes]
 drivers/cpufreq/powernv-cpufreq.c:902:6: warning: no previous prototype for ‘powernv_cpufreq_work_fn’ [-Wmissing-prototypes]

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/powernv-cpufreq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
index 8646eb197cd96..068cc53abe320 100644
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -666,7 +666,7 @@ static inline void  queue_gpstate_timer(struct global_pstate_info *gpstates)
  * according quadratic equation. Queues a new timer if it is still not equal
  * to local pstate
  */
-void gpstate_timer_handler(struct timer_list *t)
+static void gpstate_timer_handler(struct timer_list *t)
 {
 	struct global_pstate_info *gpstates = from_timer(gpstates, t, timer);
 	struct cpufreq_policy *policy = gpstates->policy;
@@ -899,7 +899,7 @@ static struct notifier_block powernv_cpufreq_reboot_nb = {
 	.notifier_call = powernv_cpufreq_reboot_notifier,
 };
 
-void powernv_cpufreq_work_fn(struct work_struct *work)
+static void powernv_cpufreq_work_fn(struct work_struct *work)
 {
 	struct chip *chip = container_of(work, struct chip, throttle);
 	struct cpufreq_policy *policy;
-- 
2.25.1

[PATCH v2 07/13] cpufreq: powernv-cpufreq: Fix a bunch of kerneldoc related issues

[Lee Jones]

Repair problems with formatting and missing attributes/parameters, and
demote header comments which do not meet the required standards
applicable to kerneldoc.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/powernv-cpufreq.c:84: warning: Function parameter or member 'last_lpstate_idx' not described in 'global_pstate_info'
 drivers/cpufreq/powernv-cpufreq.c:84: warning: Function parameter or member 'last_gpstate_idx' not described in 'global_pstate_info'
 drivers/cpufreq/powernv-cpufreq.c:84: warning: Function parameter or member 'policy' not described in 'global_pstate_info'
 drivers/cpufreq/powernv-cpufreq.c:182: warning: Function parameter or member 'i' not described in 'idx_to_pstate'
 drivers/cpufreq/powernv-cpufreq.c:201: warning: Function parameter or member 'pstate' not described in 'pstate_to_idx'
 drivers/cpufreq/powernv-cpufreq.c:670: warning: Function parameter or member 't' not described in 'gpstate_timer_handler'
 drivers/cpufreq/powernv-cpufreq.c:670: warning: Excess function parameter 'data' description in 'gpstate_timer_handler'

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/powernv-cpufreq.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
index 068cc53abe320..2e5a8b8a4abaa 100644
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -64,13 +64,14 @@
  *				highest_lpstate_idx
  * @last_sampled_time:		Time from boot in ms when global pstates were
  *				last set
- * @last_lpstate_idx,		Last set value of local pstate and global
- * last_gpstate_idx		pstate in terms of cpufreq table index
+ * @last_lpstate_idx:		Last set value of local pstate and global
+ * @last_gpstate_idx:		pstate in terms of cpufreq table index
  * @timer:			Is used for ramping down if cpu goes idle for
  *				a long time with global pstate held high
  * @gpstate_lock:		A spinlock to maintain synchronization between
  *				routines called by the timer handler and
  *				governer's target_index calls
+ * @policy:			Associated CPUFreq policy
  */
 struct global_pstate_info {
 	int highest_lpstate_idx;
@@ -170,7 +171,7 @@ static inline u8 extract_pstate(u64 pmsr_val, unsigned int shift)
 
 /* Use following functions for conversions between pstate_id and index */
 
-/**
+/*
  * idx_to_pstate : Returns the pstate id corresponding to the
  *		   frequency in the cpufreq frequency table
  *		   powernv_freqs indexed by @i.
@@ -188,7 +189,7 @@ static inline u8 idx_to_pstate(unsigned int i)
 	return powernv_freqs[i].driver_data;
 }
 
-/**
+/*
  * pstate_to_idx : Returns the index in the cpufreq frequencytable
  *		   powernv_freqs for the frequency whose corresponding
  *		   pstate id is @pstate.
@@ -660,7 +661,7 @@ static inline void  queue_gpstate_timer(struct global_pstate_info *gpstates)
 /**
  * gpstate_timer_handler
  *
- * @data: pointer to cpufreq_policy on which timer was queued
+ * @t: Timer context used to fetch global pstate info struct
  *
  * This handler brings down the global pstate closer to the local pstate
  * according quadratic equation. Queues a new timer if it is still not equal
-- 
2.25.1

[PATCH v2 08/13] cpufreq: acpi-cpufreq: Mark 'dummy' variable as __always_unused

[Lee Jones]

If we fail to use a variable, even a 'dummy' one, then the compiler
complains that it is set but not used.  We know this is fine, so we
set it as __always_unused to let the compiler know.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/acpi-cpufreq.c: In function ‘cpu_freq_read_intel’:
 drivers/cpufreq/acpi-cpufreq.c:247:11: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable]
 drivers/cpufreq/acpi-cpufreq.c: In function ‘cpu_freq_read_amd’:
 drivers/cpufreq/acpi-cpufreq.c:265:11: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable]

Cc: Andy Grover <andrew.grover@intel.com>
Cc: Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
Cc: Dominik Brodowski <linux@brodo.de>
Cc: Denis Sadykov <denis.m.sadykov@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/acpi-cpufreq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 429e5a36c08a9..6b3d8355c8dea 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -244,7 +244,7 @@ static unsigned extract_freq(struct cpufreq_policy *policy, u32 val)
 
 static u32 cpu_freq_read_intel(struct acpi_pct_register *not_used)
 {
-	u32 val, dummy;
+	u32 val, dummy __always_unused;
 
 	rdmsr(MSR_IA32_PERF_CTL, val, dummy);
 	return val;
@@ -261,7 +261,7 @@ static void cpu_freq_write_intel(struct acpi_pct_register *not_used, u32 val)
 
 static u32 cpu_freq_read_amd(struct acpi_pct_register *not_used)
 {
-	u32 val, dummy;
+	u32 val, dummy __always_unused;
 
 	rdmsr(MSR_AMD_PERF_CTL, val, dummy);
 	return val;
-- 
2.25.1

[PATCH v2 09/13] cpufreq: acpi-cpufreq: Mark sometimes used ID structs as __maybe_unused

[Lee Jones]

Not used when MODULE is not defined.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/acpi-cpufreq.c:1004:36: warning: ‘processor_device_ids’ defined but not used [-Wunused-const-variable=]
 997 | static const struct x86_cpu_id acpi_cpufreq_ids[] = {
 | ^~~~~~~~~~~~~~~~
 drivers/cpufreq/acpi-cpufreq.c:997:32: warning: ‘acpi_cpufreq_ids’ defined but not used [-Wunused-const-variable=]
 619 | static const struct acpi_device_id processor_device_ids[] = {
 | ^~~~~~~~~~~~~~~~~~~~

Cc: Andy Grover <andrew.grover@intel.com>
Cc: Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
Cc: Dominik Brodowski <linux@brodo.de>
Cc: Denis Sadykov <denis.m.sadykov@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/acpi-cpufreq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 6b3d8355c8dea..65bdedcc7f142 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -993,14 +993,14 @@ MODULE_PARM_DESC(acpi_pstate_strict,
 late_initcall(acpi_cpufreq_init);
 module_exit(acpi_cpufreq_exit);
 
-static const struct x86_cpu_id acpi_cpufreq_ids[] = {
+static const struct x86_cpu_id __maybe_unused acpi_cpufreq_ids[] = {
 	X86_MATCH_FEATURE(X86_FEATURE_ACPI, NULL),
 	X86_MATCH_FEATURE(X86_FEATURE_HW_PSTATE, NULL),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, acpi_cpufreq_ids);
 
-static const struct acpi_device_id processor_device_ids[] = {
+static const struct acpi_device_id __maybe_unused processor_device_ids[] = {
 	{ACPI_PROCESSOR_OBJECT_HID, },
 	{ACPI_PROCESSOR_DEVICE_HID, },
 	{},
-- 
2.25.1

[PATCH v2 10/13] cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as __always_unused

[Lee Jones]

if we fail to use a variable, even a dummy ones, then the compiler
complains that it is set but not used.  We know this is fine, so we
set them as __always_unused here to let the compiler know.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/powernow-k8.c: In function ‘pending_bit_stuck’:
 drivers/cpufreq/powernow-k8.c:89:10: warning: variable ‘hi’ set but not used [-Wunused-but-set-variable]
 89 | u32 lo, hi;
 | ^~
 drivers/cpufreq/powernow-k8.c: In function ‘core_voltage_pre_transition’:
 drivers/cpufreq/powernow-k8.c:285:14: warning: variable ‘lo’ set but not used [-Wunused-but-set-variable]
 285 | u32 maxvid, lo, rvomult = 1;
 | ^~

Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: Dominik Brodowski <linux@brodo.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Paul Devriendt <paul.devriendt@amd.com>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/powernow-k8.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 3984959eed1d5..0acc9e241cd7d 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -86,7 +86,7 @@ static u32 convert_fid_to_vco_fid(u32 fid)
  */
 static int pending_bit_stuck(void)
 {
-	u32 lo, hi;
+	u32 lo, hi __always_unused;
 
 	rdmsr(MSR_FIDVID_STATUS, lo, hi);
 	return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0;
@@ -282,7 +282,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data,
 {
 	u32 rvosteps = data->rvo;
 	u32 savefid = data->currfid;
-	u32 maxvid, lo, rvomult = 1;
+	u32 maxvid, lo __always_unused, rvomult = 1;
 
 	pr_debug("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n",
 		smp_processor_id(),
-- 
2.25.1

[PATCH v2 11/13] cpufreq: pcc-cpufreq: Mark sometimes used ID structs as __maybe_unused

[Lee Jones]

Not used when MODULE is not defined.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/pcc-cpufreq.c:619:36: warning: ‘processor_device_ids’ defined but not used [-Wunused-const-variable=]
 619 | static const struct acpi_device_id processor_device_ids[] = {
 | ^~~~~~~~~~~~~~~~~~~~

Cc: Matthew Garrett <mjg@redhat.com>
Cc: Nagananda Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/pcc-cpufreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c
index 5789fe7a94bd3..9f3fc7a073d07 100644
--- a/drivers/cpufreq/pcc-cpufreq.c
+++ b/drivers/cpufreq/pcc-cpufreq.c
@@ -616,7 +616,7 @@ static void __exit pcc_cpufreq_exit(void)
 	free_percpu(pcc_cpu_info);
 }
 
-static const struct acpi_device_id processor_device_ids[] = {
+static const struct acpi_device_id __maybe_unused processor_device_ids[] = {
 	{ACPI_PROCESSOR_OBJECT_HID, },
 	{ACPI_PROCESSOR_DEVICE_HID, },
 	{},
-- 
2.25.1

[PATCH v2 12/13] cpufreq: intel_pstate: Supply struct attribute description for get_aperf_mperf_shift()

[Lee Jones]

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/intel_pstate.c:293: warning: Function parameter or member 'get_aperf_mperf_shift' not described in 'pstate_funcs'

Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Dirk Brandewie <dirk.j.brandewie@intel.com>
Suggested-by: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/intel_pstate.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 44c7b4677675d..3960f971fdfb3 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -275,6 +275,8 @@ static struct cpudata **all_cpu_data;
  * @get_min:		Callback to get minimum P state
  * @get_turbo:		Callback to get turbo P state
  * @get_scaling:	Callback to get frequency scaling factor
+ * @get_aperf_mperf_shift: Callback to get the APERF vs MPERF frequency
+ *			   difference
  * @get_val:		Callback to convert P state to actual MSR write value
  * @get_vid:		Callback to get VID data for Atom platforms
  *
-- 
2.25.1

[PATCH v2 13/13] cpufreq: amd_freq_sensitivity: Mark sometimes used ID structs as __maybe_unused

[Lee Jones]

ot used when MODULE is not defined.

Fixes the following W=1 kernel build warning(s):

 drivers/cpufreq/amd_freq_sensitivity.c:147:32: warning: ‘amd_freq_sensitivity_ids’ defined but not used [-Wunused-const-variable=]
 147 | static const struct x86_cpu_id amd_freq_sensitivity_ids[] = {
 | ^~~~~~~~~~~~~~~~~~~~~~~~

Cc: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/cpufreq/amd_freq_sensitivity.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/amd_freq_sensitivity.c b/drivers/cpufreq/amd_freq_sensitivity.c
index f7c4206d4c90b..d0b10baf039ab 100644
--- a/drivers/cpufreq/amd_freq_sensitivity.c
+++ b/drivers/cpufreq/amd_freq_sensitivity.c
@@ -144,7 +144,7 @@ static void __exit amd_freq_sensitivity_exit(void)
 }
 module_exit(amd_freq_sensitivity_exit);
 
-static const struct x86_cpu_id amd_freq_sensitivity_ids[] = {
+static const struct x86_cpu_id __maybe_unused amd_freq_sensitivity_ids[] = {
 	X86_MATCH_FEATURE(X86_FEATURE_PROC_FEEDBACK, NULL),
 	{}
 };
-- 
2.25.1

Re: [PATCH v2 06/13] cpufreq: powernv-cpufreq: Functions only used in call-backs should be static

[Viresh Kumar]

On 15-07-20, 09:26, Lee Jones wrote:
> Fixes the following W=1 kernel build warning(s):
> 
>  drivers/cpufreq/powernv-cpufreq.c:669:6: warning: no previous prototype for ‘gpstate_timer_handler’ [-Wmissing-prototypes]
>  drivers/cpufreq/powernv-cpufreq.c:902:6: warning: no previous prototype for ‘powernv_cpufreq_work_fn’ [-Wmissing-prototypes]
> 
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: linuxppc-dev@lists.ozlabs.org
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
>  drivers/cpufreq/powernv-cpufreq.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
> index 8646eb197cd96..068cc53abe320 100644
> --- a/drivers/cpufreq/powernv-cpufreq.c
> +++ b/drivers/cpufreq/powernv-cpufreq.c
> @@ -666,7 +666,7 @@ static inline void  queue_gpstate_timer(struct global_pstate_info *gpstates)
>   * according quadratic equation. Queues a new timer if it is still not equal
>   * to local pstate
>   */
> -void gpstate_timer_handler(struct timer_list *t)
> +static void gpstate_timer_handler(struct timer_list *t)
>  {
>  	struct global_pstate_info *gpstates = from_timer(gpstates, t, timer);
>  	struct cpufreq_policy *policy = gpstates->policy;
> @@ -899,7 +899,7 @@ static struct notifier_block powernv_cpufreq_reboot_nb = {
>  	.notifier_call = powernv_cpufreq_reboot_notifier,
>  };
>  
> -void powernv_cpufreq_work_fn(struct work_struct *work)
> +static void powernv_cpufreq_work_fn(struct work_struct *work)
>  {
>  	struct chip *chip = container_of(work, struct chip, throttle);
>  	struct cpufreq_policy *policy;

Don't you want to drop this patch now ? As you already reviewed the
other one on the list ?

-- 
viresh

Re: [PATCH v2 04/13] cpufreq: sti-cpufreq: Fix some formatting and misspelling issues

[Viresh Kumar]

On 15-07-20, 09:26, Lee Jones wrote:
> Kerneldoc format for attribute descriptions should be '@.*: '.
> 
> Fixes the following W=1 kernel build warning(s):
> 
>  drivers/cpufreq/sti-cpufreq.c:49: warning: cannot understand function prototype: 'struct sti_cpufreq_ddata '
> 
> Cc: Patrice Chotard <patrice.chotard@st.com>
> Cc: Pal Singh <ajitpal.singh@st.com>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  drivers/cpufreq/sti-cpufreq.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c
> index 8f16bbb164b84..a5ad96d29adca 100644
> --- a/drivers/cpufreq/sti-cpufreq.c
> +++ b/drivers/cpufreq/sti-cpufreq.c
> @@ -40,11 +40,11 @@ enum {
>  };
>  
>  /**
> - * ST CPUFreq Driver Data
> + * struct sti_cpufreq_ddata - ST CPUFreq Driver Data
>   *
> - * @cpu_node		CPU's OF node
> - * @syscfg_eng		Engineering Syscon register map
> - * @regmap		Syscon register map
> + * @cpu:		CPU's OF node
> + * @syscfg_eng:		Engineering Syscon register map
> + * @syscfg:		Syscon register map
>   */
>  static struct sti_cpufreq_ddata {
>  	struct device *cpu;

I already applied the one from V1 earlier this morning.

-- 
viresh

Re: [PATCH v2 00/13] Rid W=1 warnings in CPUFreq

[Viresh Kumar]

On 15-07-20, 09:26, Lee Jones wrote:
> This set is part of a larger effort attempting to clean-up W=1
> kernel builds, which are currently overwhelmingly riddled with
> niggly little warnings.
> 
> After these patches are applied, the build system no longer
> complains about any W=0 nor W=1 level warnings in drivers/cpufreq.
> 
> Hurrah!
> 
> Changelog
> 
> v1 => v2:
>  - Collect *-bys
>  - Use __maybe_unused instead of removing device IDs
>  - Use __always_unused instead of using unused variables
>  - Include architecture header instead of creating new include file

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh

Re: [PATCH v2 06/13] cpufreq: powernv-cpufreq: Functions only used in call-backs should be static

[Lee Jones]

On Wed, 15 Jul 2020, Viresh Kumar wrote:

> On 15-07-20, 09:26, Lee Jones wrote:
> > Fixes the following W=1 kernel build warning(s):
> > 
> >  drivers/cpufreq/powernv-cpufreq.c:669:6: warning: no previous prototype for ‘gpstate_timer_handler’ [-Wmissing-prototypes]
> >  drivers/cpufreq/powernv-cpufreq.c:902:6: warning: no previous prototype for ‘powernv_cpufreq_work_fn’ [-Wmissing-prototypes]
> > 
> > Cc: Michael Ellerman <mpe@ellerman.id.au>
> > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> > Cc: Paul Mackerras <paulus@samba.org>
> > Cc: linuxppc-dev@lists.ozlabs.org
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> > ---
> >  drivers/cpufreq/powernv-cpufreq.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
> > index 8646eb197cd96..068cc53abe320 100644
> > --- a/drivers/cpufreq/powernv-cpufreq.c
> > +++ b/drivers/cpufreq/powernv-cpufreq.c
> > @@ -666,7 +666,7 @@ static inline void  queue_gpstate_timer(struct global_pstate_info *gpstates)
> >   * according quadratic equation. Queues a new timer if it is still not equal
> >   * to local pstate
> >   */
> > -void gpstate_timer_handler(struct timer_list *t)
> > +static void gpstate_timer_handler(struct timer_list *t)
> >  {
> >  	struct global_pstate_info *gpstates = from_timer(gpstates, t, timer);
> >  	struct cpufreq_policy *policy = gpstates->policy;
> > @@ -899,7 +899,7 @@ static struct notifier_block powernv_cpufreq_reboot_nb = {
> >  	.notifier_call = powernv_cpufreq_reboot_notifier,
> >  };
> >  
> > -void powernv_cpufreq_work_fn(struct work_struct *work)
> > +static void powernv_cpufreq_work_fn(struct work_struct *work)
> >  {
> >  	struct chip *chip = container_of(work, struct chip, throttle);
> >  	struct cpufreq_policy *policy;
> 
> Don't you want to drop this patch now ? As you already reviewed the
> other one on the list ?

Yes, please drop/ignore.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH v2 00/13] Rid W=1 warnings in CPUFreq

[Rafael J. Wysocki]

On Wed, Jul 15, 2020 at 10:27 AM Lee Jones <lee.jones@linaro.org> wrote:
>
> This set is part of a larger effort attempting to clean-up W=1
> kernel builds, which are currently overwhelmingly riddled with
> niggly little warnings.
>
> After these patches are applied, the build system no longer
> complains about any W=0 nor W=1 level warnings in drivers/cpufreq.
>
> Hurrah!
>
> Changelog
>
> v1 => v2:
>  - Collect *-bys
>  - Use __maybe_unused instead of removing device IDs
>  - Use __always_unused instead of using unused variables
>  - Include architecture header instead of creating new include file
>
> Lee Jones (13):
>   cpufreq: freq_table: Demote obvious misuse of kerneldoc to standard
>     comment blocks
>   cpufreq: cpufreq: Demote lots of function headers unworthy of
>     kerneldoc status
>   cpufreq: cpufreq_governor: Demote store_sampling_rate() header to
>     standard comment block
>   cpufreq: sti-cpufreq: Fix some formatting and misspelling issues
>   cpufreq: pasemi: Include header file for {check,restore}_astate
>     prototypes
>   cpufreq: powernv-cpufreq: Functions only used in call-backs should be
>     static
>   cpufreq: powernv-cpufreq: Fix a bunch of kerneldoc related issues
>   cpufreq: acpi-cpufreq: Mark 'dummy' variable as __always_unused
>   cpufreq: acpi-cpufreq: Mark sometimes used ID structs as
>     __maybe_unused
>   cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as
>     __always_unused
>   cpufreq: pcc-cpufreq: Mark sometimes used ID structs as __maybe_unused
>   cpufreq: intel_pstate: Supply struct attribute description for
>     get_aperf_mperf_shift()
>   cpufreq: amd_freq_sensitivity: Mark sometimes used ID structs as
>     __maybe_unused
>
>  drivers/cpufreq/acpi-cpufreq.c         |  8 +++----
>  drivers/cpufreq/amd_freq_sensitivity.c |  2 +-
>  drivers/cpufreq/cpufreq.c              | 32 ++++++++++++++------------
>  drivers/cpufreq/cpufreq_governor.c     |  2 +-
>  drivers/cpufreq/freq_table.c           |  6 ++---
>  drivers/cpufreq/intel_pstate.c         |  2 ++
>  drivers/cpufreq/pasemi-cpufreq.c       |  2 ++
>  drivers/cpufreq/pcc-cpufreq.c          |  2 +-
>  drivers/cpufreq/powernow-k8.c          |  4 ++--
>  drivers/cpufreq/powernv-cpufreq.c      | 15 ++++++------
>  drivers/cpufreq/sti-cpufreq.c          |  8 +++----
>  11 files changed, 45 insertions(+), 38 deletions(-)
>
> --

All patches except for the [04/13] (applied by Viresh) and [06/13]
(requested to be ignored) applied as 5.9 material with the ACKs from
Viresh, thanks!

Re: [PATCH v2 10/13] cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as __always_unused

[Pavel Machek]

[-- Attachment #1: Type: text/plain, Size: 1055 bytes --]

On Wed 2020-07-15 09:26:31, Lee Jones wrote:
> if we fail to use a variable, even a dummy ones, then the compiler
> complains that it is set but not used.  We know this is fine, so we
> set them as __always_unused here to let the compiler know.
> 
> Fixes the following W=1 kernel build warning(s):
> 
>  drivers/cpufreq/powernow-k8.c: In function ‘pending_bit_stuck’:
>  drivers/cpufreq/powernow-k8.c:89:10: warning: variable ‘hi’ set but not used [-Wunused-but-set-variable]
>  89 | u32 lo, hi;
>  | ^~
>  drivers/cpufreq/powernow-k8.c: In function ‘core_voltage_pre_transition’:
>  drivers/cpufreq/powernow-k8.c:285:14: warning: variable ‘lo’ set but not used [-Wunused-but-set-variable]
>  285 | u32 maxvid, lo, rvomult = 1;
>  | ^~
> 
> Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
> Cc: Dominik Brodowski <linux@brodo.de>

Acked-by: Pavel Machek <pavel@ucw.cz>

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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