cpumask: Rephrase comments for cpumask_any*() APIs

The cpumask_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.

cpumask_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.

CC: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>

Author: vax-r

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
@@ -840,15 +840,15 @@ 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.
  */
 #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
  *