[PATCH v3] cpumask: Rephrase comments for cpu_any*() APIs

[PATCH v3] cpumask: Rephrase comments for cpu_any*() APIs

[I Hsin Cheng]

The cpu_any*() APIs comment states that it returns a "random" cpu within
the given cpumask. However it's not actually random as random itself
stands a meaning for uniform distribution.

cpu_any*() APIs are a naming convention for the caller to states that it
doesn't care which CPU it gets, so change "random" to "arbitrary" would
be more appropriate.

Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
---
v1 -> v2:
- Fix typo for Hoever/However
- Drop quotes around 'arbitrary' word

v2 -> v3:
- Place changelogs in the correct position

 include/linux/cpumask.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 9278a50d5..93be218fc 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -391,7 +391,7 @@ unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int sta
 	for_each_set_bit_from(cpu, cpumask_bits(mask), small_cpumask_bits)
 
 /**
- * cpumask_any_but - return a "random" in a cpumask, but not this one.
+ * cpumask_any_but - return an arbitrary cpu in a cpumask, but not this one.
  * @mask: the cpumask to search
  * @cpu: the cpu to ignore.
  *
@@ -411,7 +411,7 @@ unsigned int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
 }
 
 /**
- * cpumask_any_and_but - pick a "random" cpu from *mask1 & *mask2, but not this one.
+ * cpumask_any_and_but - pick an arbitrary cpu from *mask1 & *mask2, but not this one.
  * @mask1: the first input cpumask
  * @mask2: the second input cpumask
  * @cpu: the cpu to ignore
@@ -840,7 +840,7 @@ void cpumask_copy(struct cpumask *dstp, const struct cpumask *srcp)
 }
 
 /**
- * cpumask_any - pick a "random" cpu from *srcp
+ * cpumask_any - pick an arbitrary cpu from *srcp
  * @srcp: the input cpumask
  *
  * Return: >= nr_cpu_ids if no cpus set.
@@ -848,7 +848,7 @@ void cpumask_copy(struct cpumask *dstp, const struct cpumask *srcp)
 #define cpumask_any(srcp) cpumask_first(srcp)
 
 /**
- * cpumask_any_and - pick a "random" cpu from *mask1 & *mask2
+ * cpumask_any_and - pick an arbitrary cpu from *mask1 & *mask2
  * @mask1: the first input cpumask
  * @mask2: the second input cpumask
  *
-- 
2.43.0

Re: [PATCH v3] cpumask: Rephrase comments for cpu_any*() APIs

[Yury Norov]

On Fri, Jan 17, 2025 at 10:27:24PM +0800, I Hsin Cheng wrote:
> The cpu_any*() APIs comment states that it returns a "random" cpu within
> the given cpumask. However it's not actually random as random itself
> stands a meaning for uniform distribution.
> 
> cpu_any*() APIs are a naming convention for the caller to states that it

There's no cpu_any* API. I replaced it with cpumask_any* and applied
in bitmap-for-next.

Thanks,
Yury

> doesn't care which CPU it gets, so change "random" to "arbitrary" would
> be more appropriate.
> 
> Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
> Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
> ---
> v1 -> v2:
> - Fix typo for Hoever/However
> - Drop quotes around 'arbitrary' word
> 
> v2 -> v3:
> - Place changelogs in the correct position
> 
>  include/linux/cpumask.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
> index 9278a50d5..93be218fc 100644
> --- a/include/linux/cpumask.h
> +++ b/include/linux/cpumask.h
> @@ -391,7 +391,7 @@ unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int sta
>  	for_each_set_bit_from(cpu, cpumask_bits(mask), small_cpumask_bits)
>  
>  /**
> - * cpumask_any_but - return a "random" in a cpumask, but not this one.
> + * cpumask_any_but - return an arbitrary cpu in a cpumask, but not this one.
>   * @mask: the cpumask to search
>   * @cpu: the cpu to ignore.
>   *
> @@ -411,7 +411,7 @@ unsigned int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
>  }
>  
>  /**
> - * cpumask_any_and_but - pick a "random" cpu from *mask1 & *mask2, but not this one.
> + * cpumask_any_and_but - pick an arbitrary cpu from *mask1 & *mask2, but not this one.
>   * @mask1: the first input cpumask
>   * @mask2: the second input cpumask
>   * @cpu: the cpu to ignore
> @@ -840,7 +840,7 @@ void cpumask_copy(struct cpumask *dstp, const struct cpumask *srcp)
>  }
>  
>  /**
> - * cpumask_any - pick a "random" cpu from *srcp
> + * cpumask_any - pick an arbitrary cpu from *srcp
>   * @srcp: the input cpumask
>   *
>   * Return: >= nr_cpu_ids if no cpus set.
> @@ -848,7 +848,7 @@ void cpumask_copy(struct cpumask *dstp, const struct cpumask *srcp)
>  #define cpumask_any(srcp) cpumask_first(srcp)
>  
>  /**
> - * cpumask_any_and - pick a "random" cpu from *mask1 & *mask2
> + * cpumask_any_and - pick an arbitrary cpu from *mask1 & *mask2
>   * @mask1: the first input cpumask
>   * @mask2: the second input cpumask
>   *
> -- 
> 2.43.0

Re: [PATCH v3] cpumask: Rephrase comments for cpu_any*() APIs

[Kuan-Wei Chiu]

Hi Yury,

On Fri, Jan 17, 2025 at 01:36:29PM -0500, Yury Norov wrote:
> On Fri, Jan 17, 2025 at 10:27:24PM +0800, I Hsin Cheng wrote:
> > The cpu_any*() APIs comment states that it returns a "random" cpu within
> > the given cpumask. However it's not actually random as random itself
> > stands a meaning for uniform distribution.
> > 
> > cpu_any*() APIs are a naming convention for the caller to states that it
> 
> There's no cpu_any* API. I replaced it with cpumask_any* and applied
> in bitmap-for-next.
> 
The same issue exists in the subject title:
cpu_any*() -> cpumask_any*().

Could you amend it on bitmap-for-next?
Thanks.

Reagrds,
Kuan-Wei

> 
> > doesn't care which CPU it gets, so change "random" to "arbitrary" would
> > be more appropriate.
> > 
> > Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
> > Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
> > ---
> > v1 -> v2:
> > - Fix typo for Hoever/However
> > - Drop quotes around 'arbitrary' word
> > 
> > v2 -> v3:
> > - Place changelogs in the correct position
> > 
> >  include/linux/cpumask.h | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
> > index 9278a50d5..93be218fc 100644
> > --- a/include/linux/cpumask.h
> > +++ b/include/linux/cpumask.h
> > @@ -391,7 +391,7 @@ unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int sta
> >  	for_each_set_bit_from(cpu, cpumask_bits(mask), small_cpumask_bits)
> >  
> >  /**
> > - * cpumask_any_but - return a "random" in a cpumask, but not this one.
> > + * cpumask_any_but - return an arbitrary cpu in a cpumask, but not this one.
> >   * @mask: the cpumask to search
> >   * @cpu: the cpu to ignore.
> >   *
> > @@ -411,7 +411,7 @@ unsigned int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
> >  }
> >  
> >  /**
> > - * cpumask_any_and_but - pick a "random" cpu from *mask1 & *mask2, but not this one.
> > + * cpumask_any_and_but - pick an arbitrary cpu from *mask1 & *mask2, but not this one.
> >   * @mask1: the first input cpumask
> >   * @mask2: the second input cpumask
> >   * @cpu: the cpu to ignore
> > @@ -840,7 +840,7 @@ void cpumask_copy(struct cpumask *dstp, const struct cpumask *srcp)
> >  }
> >  
> >  /**
> > - * cpumask_any - pick a "random" cpu from *srcp
> > + * cpumask_any - pick an arbitrary cpu from *srcp
> >   * @srcp: the input cpumask
> >   *
> >   * Return: >= nr_cpu_ids if no cpus set.
> > @@ -848,7 +848,7 @@ void cpumask_copy(struct cpumask *dstp, const struct cpumask *srcp)
> >  #define cpumask_any(srcp) cpumask_first(srcp)
> >  
> >  /**
> > - * cpumask_any_and - pick a "random" cpu from *mask1 & *mask2
> > + * cpumask_any_and - pick an arbitrary cpu from *mask1 & *mask2
> >   * @mask1: the first input cpumask
> >   * @mask2: the second input cpumask
> >   *
> > -- 
> > 2.43.0