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SubjectRe: [PATCH v3 2/3] ARM: cpuidle: refine cpuidle_ops member's parameters.
On Thu, Jul 09 2015 at 02:33 -0600, Jisheng Zhang wrote:
>As for the suspend member function, the to-be-suspended cpu is always
>the calling cpu itself, so the 'cpu' parameter may not be necessary, let
>driver get 'cpu' itself if need.
>
>As for the init member function, the device_node here may not be
>necessary either, because we can get the node via. of_get_cpu_node().
>
>Signed-off-by: Jisheng Zhang <jszhang@marvell.com>

Tested-by: Lina Iyer <lina.iyer@linaro.org>

>---
> arch/arm/include/asm/cpuidle.h | 6 +++---
> arch/arm/kernel/cpuidle.c | 8 ++++----
> drivers/soc/qcom/spm.c | 17 ++++++++++++-----
> 3 files changed, 19 insertions(+), 12 deletions(-)
>
>diff --git a/arch/arm/include/asm/cpuidle.h b/arch/arm/include/asm/cpuidle.h
>index 0f84249..ca5dfe6 100644
>--- a/arch/arm/include/asm/cpuidle.h
>+++ b/arch/arm/include/asm/cpuidle.h
>@@ -30,8 +30,8 @@ static inline int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
> struct device_node;
>
> struct cpuidle_ops {
>- int (*suspend)(int cpu, unsigned long arg);
>- int (*init)(struct device_node *, int cpu);
>+ int (*suspend)(unsigned long arg);
>+ int (*init)(unsigned int cpu);
> };
>
> struct of_cpuidle_method {
>@@ -46,6 +46,6 @@ struct of_cpuidle_method {
>
> extern int arm_cpuidle_suspend(int index);
>
>-extern int arm_cpuidle_init(int cpu);
>+extern int arm_cpuidle_init(unsigned int cpu);
>
> #endif
>diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c
>index 318da33..7bc7bc6 100644
>--- a/arch/arm/kernel/cpuidle.c
>+++ b/arch/arm/kernel/cpuidle.c
>@@ -53,10 +53,10 @@ int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
> int arm_cpuidle_suspend(int index)
> {
> int ret = -EOPNOTSUPP;
>- int cpu = smp_processor_id();
>+ unsigned int cpu = smp_processor_id();
>
> if (cpuidle_ops[cpu].suspend)
>- ret = cpuidle_ops[cpu].suspend(cpu, index);
>+ ret = cpuidle_ops[cpu].suspend(index);
>
> return ret;
> }
>@@ -134,7 +134,7 @@ static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu)
> * -ENXIO if the HW reports a failure or a misconfiguration,
> * -ENOMEM if the HW report an memory allocation failure
> */
>-int __init arm_cpuidle_init(int cpu)
>+int __init arm_cpuidle_init(unsigned int cpu)
> {
> struct device_node *cpu_node = of_cpu_device_node_get(cpu);
> int ret;
>@@ -144,7 +144,7 @@ int __init arm_cpuidle_init(int cpu)
>
> ret = arm_cpuidle_read_ops(cpu_node, cpu);
> if (!ret && cpuidle_ops[cpu].init)
>- ret = cpuidle_ops[cpu].init(cpu_node, cpu);
>+ ret = cpuidle_ops[cpu].init(cpu);
>
> of_node_put(cpu_node);
>
>diff --git a/drivers/soc/qcom/spm.c b/drivers/soc/qcom/spm.c
>index b04b05a..1649ec3 100644
>--- a/drivers/soc/qcom/spm.c
>+++ b/drivers/soc/qcom/spm.c
>@@ -116,7 +116,7 @@ static const struct spm_reg_data spm_reg_8064_cpu = {
>
> static DEFINE_PER_CPU(struct spm_driver_data *, cpu_spm_drv);
>
>-typedef int (*idle_fn)(int);
>+typedef int (*idle_fn)(void);
> static DEFINE_PER_CPU(idle_fn*, qcom_idle_ops);
>
> static inline void spm_register_write(struct spm_driver_data *drv,
>@@ -179,9 +179,10 @@ static int qcom_pm_collapse(unsigned long int unused)
> return -1;
> }
>
>-static int qcom_cpu_spc(int cpu)
>+static int qcom_cpu_spc(void)
> {
> int ret;
>+ int cpu = smp_processor_id();
> struct spm_driver_data *drv = per_cpu(cpu_spm_drv, cpu);
>
> spm_set_low_power_mode(drv, PM_SLEEP_MODE_SPC);
>@@ -197,9 +198,11 @@ static int qcom_cpu_spc(int cpu)
> return ret;
> }
>
>-static int qcom_idle_enter(int cpu, unsigned long index)
>+static int qcom_idle_enter(unsigned long index)
> {
>- return per_cpu(qcom_idle_ops, cpu)[index](cpu);
>+ unsigned int cpu = smp_processor_id();
>+
>+ return per_cpu(qcom_idle_ops, cpu)[index]();
> }
>
> static const struct of_device_id qcom_idle_state_match[] __initconst = {
>@@ -207,7 +210,7 @@ static const struct of_device_id qcom_idle_state_match[] __initconst = {
> { },
> };
>
>-static int __init qcom_cpuidle_init(struct device_node *cpu_node, int cpu)
>+static int __init qcom_cpuidle_init(unsigned int cpu)
> {
> const struct of_device_id *match_id;
> struct device_node *state_node;
>@@ -217,6 +220,10 @@ static int __init qcom_cpuidle_init(struct device_node *cpu_node, int cpu)
> idle_fn *fns;
> cpumask_t mask;
> bool use_scm_power_down = false;
>+ struct device_node *cpu_node = of_get_cpu_node(cpu, NULL);
>+
>+ if (!cpu_node)
>+ return -ENODEV;
>
> for (i = 0; ; i++) {
> state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i);
>--
>2.1.4
>
>
>_______________________________________________
>linux-arm-kernel mailing list
>linux-arm-kernel@lists.infradead.org
>http://lists.infradead.org/mailman/listinfo/linux-arm-kernel


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