| Message ID | 1457105585-25157-1-git-send-email-jonathanh@nvidia.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | Rafael Wysocki |
| Headers | show |
On 04/03/16 15:33, Jon Hunter wrote: > The functions pm_clk_suspend() and pm_clk_resume() cannot be used > directly within the main body of a function, because when CONFIG_PM_CLK > is not defined the functions are defined as NULL and this will lead to > a compilation error. > > Add stubs functions for pm_clk_suspend() and pm_clk_resume() so that > these functions may be called directly. > > Please note that these functions are currently assigned to function > pointers in the PM domain core and so to avoid have a valid function > pointer defined when CONFIG_PM_CLK is not defined, define > GENPD_FLAG_PM_CLK as 0 when CONFIG_PM_CLK is not defined to ensure > the stubs are not populated as valid function pointers. > > Signed-off-by: Jon Hunter <jonathanh@nvidia.com> > --- > include/linux/pm_clock.h | 10 ++++++++-- > include/linux/pm_domain.h | 4 ++++ > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h > index 25266c600021..ffefbf2df1aa 100644 > --- a/include/linux/pm_clock.h > +++ b/include/linux/pm_clock.h > @@ -72,8 +72,14 @@ static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) > static inline void pm_clk_remove(struct device *dev, const char *con_id) > { > } > -#define pm_clk_suspend NULL > -#define pm_clk_resume NULL > +static inline int pm_clk_suspend(struct device *dev) > +{ > + return -EINVAL; > +} > +static inline int pm_clk_resume(struct device *dev) > +{ > + return -EINVAL; > +} > #endif > > #ifdef CONFIG_HAVE_CLK > diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h > index 49cd8890b873..1074c2073df8 100644 > --- a/include/linux/pm_domain.h > +++ b/include/linux/pm_domain.h > @@ -17,7 +17,11 @@ > #include <linux/notifier.h> > > /* Defines used for the flags field in the struct generic_pm_domain */ > +#ifdef CONFIG_PM_CLK > #define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */ > +#else > +#define GENPD_FLAG_PM_CLK 0 > +#endif > > #define GENPD_MAX_NUM_STATES 8 /* Number of possible low power states */ Thinking about this some more, the alternative is for drivers using PM_CLK to select it. Would that be appropriate? If so, we would not need these stubs. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tuesday, March 08, 2016 05:18:06 PM Jon Hunter wrote: > > On 04/03/16 15:33, Jon Hunter wrote: > > The functions pm_clk_suspend() and pm_clk_resume() cannot be used > > directly within the main body of a function, because when CONFIG_PM_CLK > > is not defined the functions are defined as NULL and this will lead to > > a compilation error. > > > > Add stubs functions for pm_clk_suspend() and pm_clk_resume() so that > > these functions may be called directly. > > > > Please note that these functions are currently assigned to function > > pointers in the PM domain core and so to avoid have a valid function > > pointer defined when CONFIG_PM_CLK is not defined, define > > GENPD_FLAG_PM_CLK as 0 when CONFIG_PM_CLK is not defined to ensure > > the stubs are not populated as valid function pointers. > > > > Signed-off-by: Jon Hunter <jonathanh@nvidia.com> > > --- > > include/linux/pm_clock.h | 10 ++++++++-- > > include/linux/pm_domain.h | 4 ++++ > > 2 files changed, 12 insertions(+), 2 deletions(-) > > > > diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h > > index 25266c600021..ffefbf2df1aa 100644 > > --- a/include/linux/pm_clock.h > > +++ b/include/linux/pm_clock.h > > @@ -72,8 +72,14 @@ static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) > > static inline void pm_clk_remove(struct device *dev, const char *con_id) > > { > > } > > -#define pm_clk_suspend NULL > > -#define pm_clk_resume NULL > > +static inline int pm_clk_suspend(struct device *dev) > > +{ > > + return -EINVAL; > > +} > > +static inline int pm_clk_resume(struct device *dev) > > +{ > > + return -EINVAL; > > +} > > #endif > > > > #ifdef CONFIG_HAVE_CLK > > diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h > > index 49cd8890b873..1074c2073df8 100644 > > --- a/include/linux/pm_domain.h > > +++ b/include/linux/pm_domain.h > > @@ -17,7 +17,11 @@ > > #include <linux/notifier.h> > > > > /* Defines used for the flags field in the struct generic_pm_domain */ > > +#ifdef CONFIG_PM_CLK > > #define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */ > > +#else > > +#define GENPD_FLAG_PM_CLK 0 > > +#endif > > > > #define GENPD_MAX_NUM_STATES 8 /* Number of possible low power states */ > > Thinking about this some more, the alternative is for drivers using > PM_CLK to select it. Would that be appropriate? If so, we would not need > these stubs. Well, I don't see why it might not be appropriate. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 08/03/16 22:58, Rafael J. Wysocki wrote: > On Tuesday, March 08, 2016 05:18:06 PM Jon Hunter wrote: >> >> On 04/03/16 15:33, Jon Hunter wrote: >>> The functions pm_clk_suspend() and pm_clk_resume() cannot be used >>> directly within the main body of a function, because when CONFIG_PM_CLK >>> is not defined the functions are defined as NULL and this will lead to >>> a compilation error. >>> >>> Add stubs functions for pm_clk_suspend() and pm_clk_resume() so that >>> these functions may be called directly. >>> >>> Please note that these functions are currently assigned to function >>> pointers in the PM domain core and so to avoid have a valid function >>> pointer defined when CONFIG_PM_CLK is not defined, define >>> GENPD_FLAG_PM_CLK as 0 when CONFIG_PM_CLK is not defined to ensure >>> the stubs are not populated as valid function pointers. >>> >>> Signed-off-by: Jon Hunter <jonathanh@nvidia.com> >>> --- >>> include/linux/pm_clock.h | 10 ++++++++-- >>> include/linux/pm_domain.h | 4 ++++ >>> 2 files changed, 12 insertions(+), 2 deletions(-) >>> >>> diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h >>> index 25266c600021..ffefbf2df1aa 100644 >>> --- a/include/linux/pm_clock.h >>> +++ b/include/linux/pm_clock.h >>> @@ -72,8 +72,14 @@ static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) >>> static inline void pm_clk_remove(struct device *dev, const char *con_id) >>> { >>> } >>> -#define pm_clk_suspend NULL >>> -#define pm_clk_resume NULL >>> +static inline int pm_clk_suspend(struct device *dev) >>> +{ >>> + return -EINVAL; >>> +} >>> +static inline int pm_clk_resume(struct device *dev) >>> +{ >>> + return -EINVAL; >>> +} >>> #endif >>> >>> #ifdef CONFIG_HAVE_CLK >>> diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h >>> index 49cd8890b873..1074c2073df8 100644 >>> --- a/include/linux/pm_domain.h >>> +++ b/include/linux/pm_domain.h >>> @@ -17,7 +17,11 @@ >>> #include <linux/notifier.h> >>> >>> /* Defines used for the flags field in the struct generic_pm_domain */ >>> +#ifdef CONFIG_PM_CLK >>> #define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */ >>> +#else >>> +#define GENPD_FLAG_PM_CLK 0 >>> +#endif >>> >>> #define GENPD_MAX_NUM_STATES 8 /* Number of possible low power states */ >> >> Thinking about this some more, the alternative is for drivers using >> PM_CLK to select it. Would that be appropriate? If so, we would not need >> these stubs. > > Well, I don't see why it might not be appropriate. Ok, thanks. I will drop this patch for now and update the 2nd patch of this series to address the comments from Geert. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h index 25266c600021..ffefbf2df1aa 100644 --- a/include/linux/pm_clock.h +++ b/include/linux/pm_clock.h @@ -72,8 +72,14 @@ static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) static inline void pm_clk_remove(struct device *dev, const char *con_id) { } -#define pm_clk_suspend NULL -#define pm_clk_resume NULL +static inline int pm_clk_suspend(struct device *dev) +{ + return -EINVAL; +} +static inline int pm_clk_resume(struct device *dev) +{ + return -EINVAL; +} #endif #ifdef CONFIG_HAVE_CLK diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 49cd8890b873..1074c2073df8 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -17,7 +17,11 @@ #include <linux/notifier.h> /* Defines used for the flags field in the struct generic_pm_domain */ +#ifdef CONFIG_PM_CLK #define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */ +#else +#define GENPD_FLAG_PM_CLK 0 +#endif #define GENPD_MAX_NUM_STATES 8 /* Number of possible low power states */
The functions pm_clk_suspend() and pm_clk_resume() cannot be used directly within the main body of a function, because when CONFIG_PM_CLK is not defined the functions are defined as NULL and this will lead to a compilation error. Add stubs functions for pm_clk_suspend() and pm_clk_resume() so that these functions may be called directly. Please note that these functions are currently assigned to function pointers in the PM domain core and so to avoid have a valid function pointer defined when CONFIG_PM_CLK is not defined, define GENPD_FLAG_PM_CLK as 0 when CONFIG_PM_CLK is not defined to ensure the stubs are not populated as valid function pointers. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> --- include/linux/pm_clock.h | 10 ++++++++-- include/linux/pm_domain.h | 4 ++++ 2 files changed, 12 insertions(+), 2 deletions(-)