cpumask: kernel-doc cleanups and additions
Clean up some punctutation and abbreviations. Add kernel-doc notation for one function and function return value for 39 functions. cpumask.h: Fix some punctuation (plural vs. possessive). Fix some abbreviations (ie. -> i.e., id -> ID). Fix 35 warnings like this: include/linux/cpumask.h:161: warning: No description found for return value of 'cpumask_first' cpumask.c: Add Return: value for 4 functions. Add kernel-doc for cpumask_any_distribute(). Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Yury Norov <yury.norov@gmail.com>
This commit is contained in:
Randy Dunlap
Yury Norov
parent
94f6f0550c
commit
57f728d59f
@ -4,7 +4,7 @@
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/*
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* Cpumasks provide a bitmap suitable for representing the
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* set of CPU's in a system, one bit position per CPU number. In general,
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* set of CPUs in a system, one bit position per CPU number. In general,
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* only nr_cpu_ids (<= NR_CPUS) bits are valid.
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*/
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#include <linux/kernel.h>
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@ -97,7 +97,7 @@ static inline void set_nr_cpu_ids(unsigned int nr)
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*
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* If !CONFIG_HOTPLUG_CPU, present == possible, and active == online.
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*
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* The cpu_possible_mask is fixed at boot time, as the set of CPU id's
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* The cpu_possible_mask is fixed at boot time, as the set of CPU IDs
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* that it is possible might ever be plugged in at anytime during the
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* life of that system boot. The cpu_present_mask is dynamic(*),
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* representing which CPUs are currently plugged in. And
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@ -112,7 +112,7 @@ static inline void set_nr_cpu_ids(unsigned int nr)
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* hotplug, it's a copy of cpu_possible_mask, hence fixed at boot.
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*
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* Subtleties:
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* 1) UP arch's (NR_CPUS == 1, CONFIG_SMP not defined) hardcode
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* 1) UP ARCHes (NR_CPUS == 1, CONFIG_SMP not defined) hardcode
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* assumption that their single CPU is online. The UP
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* cpu_{online,possible,present}_masks are placebos. Changing them
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* will have no useful affect on the following num_*_cpus()
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@ -155,7 +155,7 @@ static __always_inline unsigned int cpumask_check(unsigned int cpu)
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* cpumask_first - get the first cpu in a cpumask
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* @srcp: the cpumask pointer
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*
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* Returns >= nr_cpu_ids if no cpus set.
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* Return: >= nr_cpu_ids if no cpus set.
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*/
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static inline unsigned int cpumask_first(const struct cpumask *srcp)
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{
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@ -166,7 +166,7 @@ static inline unsigned int cpumask_first(const struct cpumask *srcp)
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* cpumask_first_zero - get the first unset cpu in a cpumask
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* @srcp: the cpumask pointer
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*
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* Returns >= nr_cpu_ids if all cpus are set.
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* Return: >= nr_cpu_ids if all cpus are set.
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*/
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static inline unsigned int cpumask_first_zero(const struct cpumask *srcp)
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{
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@ -178,7 +178,7 @@ static inline unsigned int cpumask_first_zero(const struct cpumask *srcp)
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* @srcp1: the first input
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* @srcp2: the second input
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*
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* Returns >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and().
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* Return: >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and().
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*/
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static inline
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unsigned int cpumask_first_and(const struct cpumask *srcp1, const struct cpumask *srcp2)
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@ -190,7 +190,7 @@ unsigned int cpumask_first_and(const struct cpumask *srcp1, const struct cpumask
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* cpumask_last - get the last CPU in a cpumask
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* @srcp: - the cpumask pointer
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*
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* Returns >= nr_cpumask_bits if no CPUs set.
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* Return: >= nr_cpumask_bits if no CPUs set.
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*/
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static inline unsigned int cpumask_last(const struct cpumask *srcp)
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{
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@ -199,10 +199,10 @@ static inline unsigned int cpumask_last(const struct cpumask *srcp)
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/**
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* cpumask_next - get the next cpu in a cpumask
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* @n: the cpu prior to the place to search (ie. return will be > @n)
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* @n: the cpu prior to the place to search (i.e. return will be > @n)
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* @srcp: the cpumask pointer
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*
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* Returns >= nr_cpu_ids if no further cpus set.
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* Return: >= nr_cpu_ids if no further cpus set.
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*/
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static inline
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unsigned int cpumask_next(int n, const struct cpumask *srcp)
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@ -215,10 +215,10 @@ unsigned int cpumask_next(int n, const struct cpumask *srcp)
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/**
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* cpumask_next_zero - get the next unset cpu in a cpumask
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* @n: the cpu prior to the place to search (ie. return will be > @n)
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* @n: the cpu prior to the place to search (i.e. return will be > @n)
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* @srcp: the cpumask pointer
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*
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* Returns >= nr_cpu_ids if no further cpus unset.
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* Return: >= nr_cpu_ids if no further cpus unset.
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*/
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static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp)
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{
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@ -254,11 +254,11 @@ unsigned int cpumask_any_distribute(const struct cpumask *srcp);
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/**
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* cpumask_next_and - get the next cpu in *src1p & *src2p
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* @n: the cpu prior to the place to search (ie. return will be > @n)
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* @n: the cpu prior to the place to search (i.e. return will be > @n)
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* @src1p: the first cpumask pointer
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* @src2p: the second cpumask pointer
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*
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* Returns >= nr_cpu_ids if no further cpus set in both.
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* Return: >= nr_cpu_ids if no further cpus set in both.
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*/
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static inline
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unsigned int cpumask_next_and(int n, const struct cpumask *src1p,
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@ -373,7 +373,7 @@ unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int sta
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* @cpu: the cpu to ignore.
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*
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* Often used to find any cpu but smp_processor_id() in a mask.
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* Returns >= nr_cpu_ids if no cpus set.
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* Return: >= nr_cpu_ids if no cpus set.
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*/
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static inline
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unsigned int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
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@ -388,11 +388,11 @@ unsigned int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
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}
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/**
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* cpumask_nth - get the first cpu in a cpumask
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* cpumask_nth - get the Nth cpu in a cpumask
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* @srcp: the cpumask pointer
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* @cpu: the N'th cpu to find, starting from 0
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* @cpu: the Nth cpu to find, starting from 0
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*
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* Returns >= nr_cpu_ids if such cpu doesn't exist.
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* Return: >= nr_cpu_ids if such cpu doesn't exist.
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*/
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static inline unsigned int cpumask_nth(unsigned int cpu, const struct cpumask *srcp)
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{
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@ -400,12 +400,12 @@ static inline unsigned int cpumask_nth(unsigned int cpu, const struct cpumask *s
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}
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/**
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* cpumask_nth_and - get the first cpu in 2 cpumasks
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* cpumask_nth_and - get the Nth cpu in 2 cpumasks
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* @srcp1: the cpumask pointer
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* @srcp2: the cpumask pointer
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* @cpu: the N'th cpu to find, starting from 0
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* @cpu: the Nth cpu to find, starting from 0
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*
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* Returns >= nr_cpu_ids if such cpu doesn't exist.
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* Return: >= nr_cpu_ids if such cpu doesn't exist.
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*/
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static inline
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unsigned int cpumask_nth_and(unsigned int cpu, const struct cpumask *srcp1,
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@ -416,12 +416,12 @@ unsigned int cpumask_nth_and(unsigned int cpu, const struct cpumask *srcp1,
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}
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/**
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* cpumask_nth_andnot - get the first cpu set in 1st cpumask, and clear in 2nd.
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* cpumask_nth_andnot - get the Nth cpu set in 1st cpumask, and clear in 2nd.
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* @srcp1: the cpumask pointer
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* @srcp2: the cpumask pointer
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* @cpu: the N'th cpu to find, starting from 0
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* @cpu: the Nth cpu to find, starting from 0
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*
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* Returns >= nr_cpu_ids if such cpu doesn't exist.
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* Return: >= nr_cpu_ids if such cpu doesn't exist.
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*/
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static inline
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unsigned int cpumask_nth_andnot(unsigned int cpu, const struct cpumask *srcp1,
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@ -436,9 +436,9 @@ unsigned int cpumask_nth_andnot(unsigned int cpu, const struct cpumask *srcp1,
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* @srcp1: the cpumask pointer
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* @srcp2: the cpumask pointer
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* @srcp3: the cpumask pointer
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* @cpu: the N'th cpu to find, starting from 0
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* @cpu: the Nth cpu to find, starting from 0
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*
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* Returns >= nr_cpu_ids if such cpu doesn't exist.
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* Return: >= nr_cpu_ids if such cpu doesn't exist.
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*/
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static __always_inline
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unsigned int cpumask_nth_and_andnot(unsigned int cpu, const struct cpumask *srcp1,
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@ -497,7 +497,7 @@ static __always_inline void __cpumask_clear_cpu(int cpu, struct cpumask *dstp)
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* @cpu: cpu number (< nr_cpu_ids)
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* @cpumask: the cpumask pointer
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*
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* Returns true if @cpu is set in @cpumask, else returns false
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* Return: true if @cpu is set in @cpumask, else returns false
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*/
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static __always_inline bool cpumask_test_cpu(int cpu, const struct cpumask *cpumask)
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{
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@ -509,9 +509,9 @@ static __always_inline bool cpumask_test_cpu(int cpu, const struct cpumask *cpum
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* @cpu: cpu number (< nr_cpu_ids)
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* @cpumask: the cpumask pointer
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*
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* Returns true if @cpu is set in old bitmap of @cpumask, else returns false
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*
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* test_and_set_bit wrapper for cpumasks.
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*
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* Return: true if @cpu is set in old bitmap of @cpumask, else returns false
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*/
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static __always_inline bool cpumask_test_and_set_cpu(int cpu, struct cpumask *cpumask)
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{
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@ -523,9 +523,9 @@ static __always_inline bool cpumask_test_and_set_cpu(int cpu, struct cpumask *cp
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* @cpu: cpu number (< nr_cpu_ids)
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* @cpumask: the cpumask pointer
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*
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* Returns true if @cpu is set in old bitmap of @cpumask, else returns false
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*
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* test_and_clear_bit wrapper for cpumasks.
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*
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* Return: true if @cpu is set in old bitmap of @cpumask, else returns false
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*/
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static __always_inline bool cpumask_test_and_clear_cpu(int cpu, struct cpumask *cpumask)
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{
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@ -560,7 +560,7 @@ static inline void cpumask_clear(struct cpumask *dstp)
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* @src1p: the first input
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* @src2p: the second input
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*
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* If *@dstp is empty, returns false, else returns true
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* Return: false if *@dstp is empty, else returns true
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*/
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static inline bool cpumask_and(struct cpumask *dstp,
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const struct cpumask *src1p,
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@ -603,7 +603,7 @@ static inline void cpumask_xor(struct cpumask *dstp,
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* @src1p: the first input
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* @src2p: the second input
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*
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* If *@dstp is empty, returns false, else returns true
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* Return: false if *@dstp is empty, else returns true
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*/
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static inline bool cpumask_andnot(struct cpumask *dstp,
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const struct cpumask *src1p,
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@ -617,6 +617,8 @@ static inline bool cpumask_andnot(struct cpumask *dstp,
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* cpumask_equal - *src1p == *src2p
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* @src1p: the first input
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* @src2p: the second input
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*
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* Return: true if the cpumasks are equal, false if not
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*/
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static inline bool cpumask_equal(const struct cpumask *src1p,
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const struct cpumask *src2p)
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@ -630,6 +632,9 @@ static inline bool cpumask_equal(const struct cpumask *src1p,
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* @src1p: the first input
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* @src2p: the second input
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* @src3p: the third input
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*
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* Return: true if first cpumask ORed with second cpumask == third cpumask,
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* otherwise false
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*/
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static inline bool cpumask_or_equal(const struct cpumask *src1p,
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const struct cpumask *src2p,
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@ -643,6 +648,9 @@ static inline bool cpumask_or_equal(const struct cpumask *src1p,
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* cpumask_intersects - (*src1p & *src2p) != 0
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* @src1p: the first input
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* @src2p: the second input
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*
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* Return: true if first cpumask ANDed with second cpumask is non-empty,
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* otherwise false
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*/
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static inline bool cpumask_intersects(const struct cpumask *src1p,
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const struct cpumask *src2p)
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@ -656,7 +664,7 @@ static inline bool cpumask_intersects(const struct cpumask *src1p,
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* @src1p: the first input
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* @src2p: the second input
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*
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* Returns true if *@src1p is a subset of *@src2p, else returns false
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* Return: true if *@src1p is a subset of *@src2p, else returns false
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*/
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static inline bool cpumask_subset(const struct cpumask *src1p,
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const struct cpumask *src2p)
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@ -668,6 +676,8 @@ static inline bool cpumask_subset(const struct cpumask *src1p,
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/**
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* cpumask_empty - *srcp == 0
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* @srcp: the cpumask to that all cpus < nr_cpu_ids are clear.
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*
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* Return: true if srcp is empty (has no bits set), else false
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*/
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static inline bool cpumask_empty(const struct cpumask *srcp)
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{
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@ -677,6 +687,8 @@ static inline bool cpumask_empty(const struct cpumask *srcp)
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/**
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* cpumask_full - *srcp == 0xFFFFFFFF...
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* @srcp: the cpumask to that all cpus < nr_cpu_ids are set.
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*
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* Return: true if srcp is full (has all bits set), else false
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*/
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static inline bool cpumask_full(const struct cpumask *srcp)
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{
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@ -686,6 +698,8 @@ static inline bool cpumask_full(const struct cpumask *srcp)
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/**
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* cpumask_weight - Count of bits in *srcp
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* @srcp: the cpumask to count bits (< nr_cpu_ids) in.
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*
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* Return: count of bits set in *srcp
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*/
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static inline unsigned int cpumask_weight(const struct cpumask *srcp)
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{
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@ -696,6 +710,8 @@ static inline unsigned int cpumask_weight(const struct cpumask *srcp)
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* cpumask_weight_and - Count of bits in (*srcp1 & *srcp2)
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* @srcp1: the cpumask to count bits (< nr_cpu_ids) in.
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* @srcp2: the cpumask to count bits (< nr_cpu_ids) in.
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*
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* Return: count of bits set in both *srcp1 and *srcp2
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*/
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static inline unsigned int cpumask_weight_and(const struct cpumask *srcp1,
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const struct cpumask *srcp2)
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@ -744,7 +760,7 @@ static inline void cpumask_copy(struct cpumask *dstp,
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* cpumask_any - pick a "random" cpu from *srcp
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* @srcp: the input cpumask
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*
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* Returns >= nr_cpu_ids if no cpus set.
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* Return: >= nr_cpu_ids if no cpus set.
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*/
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#define cpumask_any(srcp) cpumask_first(srcp)
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@ -753,7 +769,7 @@ static inline void cpumask_copy(struct cpumask *dstp,
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* @mask1: the first input cpumask
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* @mask2: the second input cpumask
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*
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* Returns >= nr_cpu_ids if no cpus set.
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* Return: >= nr_cpu_ids if no cpus set.
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*/
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#define cpumask_any_and(mask1, mask2) cpumask_first_and((mask1), (mask2))
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@ -769,7 +785,7 @@ static inline void cpumask_copy(struct cpumask *dstp,
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* @len: the length of the buffer
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* @dstp: the cpumask to set.
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*
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* Returns -errno, or 0 for success.
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* Return: -errno, or 0 for success.
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*/
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static inline int cpumask_parse_user(const char __user *buf, int len,
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struct cpumask *dstp)
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@ -783,7 +799,7 @@ static inline int cpumask_parse_user(const char __user *buf, int len,
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* @len: the length of the buffer
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* @dstp: the cpumask to set.
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*
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* Returns -errno, or 0 for success.
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* Return: -errno, or 0 for success.
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*/
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static inline int cpumask_parselist_user(const char __user *buf, int len,
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struct cpumask *dstp)
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@ -797,7 +813,7 @@ static inline int cpumask_parselist_user(const char __user *buf, int len,
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* @buf: the buffer to extract from
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* @dstp: the cpumask to set.
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*
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* Returns -errno, or 0 for success.
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* Return: -errno, or 0 for success.
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*/
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static inline int cpumask_parse(const char *buf, struct cpumask *dstp)
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{
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@ -809,7 +825,7 @@ static inline int cpumask_parse(const char *buf, struct cpumask *dstp)
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* @buf: the buffer to extract from
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* @dstp: the cpumask to set.
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*
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* Returns -errno, or 0 for success.
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* Return: -errno, or 0 for success.
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*/
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static inline int cpulist_parse(const char *buf, struct cpumask *dstp)
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{
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@ -817,7 +833,9 @@ static inline int cpulist_parse(const char *buf, struct cpumask *dstp)
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}
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/**
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* cpumask_size - size to allocate for a 'struct cpumask' in bytes
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* cpumask_size - calculate size to allocate for a 'struct cpumask' in bytes
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*
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* Return: size to allocate for a &struct cpumask in bytes
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*/
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static inline unsigned int cpumask_size(void)
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{
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@ -831,7 +849,7 @@ static inline unsigned int cpumask_size(void)
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* little more difficult, we typedef cpumask_var_t to an array or a
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* pointer: doing &mask on an array is a noop, so it still works.
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*
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* ie.
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* i.e.
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* cpumask_var_t tmpmask;
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* if (!alloc_cpumask_var(&tmpmask, GFP_KERNEL))
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* return -ENOMEM;
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@ -887,6 +905,8 @@ bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
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* a nop returning a constant 1 (in <linux/cpumask.h>).
|
||||
*
|
||||
* See alloc_cpumask_var_node.
|
||||
*
|
||||
* Return: %true if allocation succeeded, %false if not
|
||||
*/
|
||||
static inline
|
||||
bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
|
||||
@ -1025,7 +1045,7 @@ set_cpu_dying(unsigned int cpu, bool dying)
|
||||
}
|
||||
|
||||
/**
|
||||
* to_cpumask - convert an NR_CPUS bitmap to a struct cpumask *
|
||||
* to_cpumask - convert a NR_CPUS bitmap to a struct cpumask *
|
||||
* @bitmap: the bitmap
|
||||
*
|
||||
* There are a few places where cpumask_var_t isn't appropriate and
|
||||
@ -1068,6 +1088,8 @@ static inline const struct cpumask *get_cpu_mask(unsigned int cpu)
|
||||
* interface gives only a momentary snapshot and is not protected against
|
||||
* concurrent CPU hotplug operations unless invoked from a cpuhp_lock held
|
||||
* region.
|
||||
*
|
||||
* Return: momentary snapshot of the number of online CPUs
|
||||
*/
|
||||
static __always_inline unsigned int num_online_cpus(void)
|
||||
{
|
||||
@ -1160,7 +1182,7 @@ static inline bool cpu_dying(unsigned int cpu)
|
||||
* @mask: the cpumask to copy
|
||||
* @buf: the buffer to copy into
|
||||
*
|
||||
* Returns the length of the (null-terminated) @buf string, zero if
|
||||
* Return: the length of the (null-terminated) @buf string, zero if
|
||||
* nothing is copied.
|
||||
*/
|
||||
static inline ssize_t
|
||||
@ -1183,7 +1205,7 @@ cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask)
|
||||
* cpumask; Typically used by bin_attribute to export cpumask bitmask
|
||||
* ABI.
|
||||
*
|
||||
* Returns the length of how many bytes have been copied, excluding
|
||||
* Return: the length of how many bytes have been copied, excluding
|
||||
* terminating '\0'.
|
||||
*/
|
||||
static inline ssize_t
|
||||
@ -1204,6 +1226,9 @@ cpumap_print_bitmask_to_buf(char *buf, const struct cpumask *mask,
|
||||
*
|
||||
* Everything is same with the above cpumap_print_bitmask_to_buf()
|
||||
* except the print format.
|
||||
*
|
||||
* Return: the length of how many bytes have been copied, excluding
|
||||
* terminating '\0'.
|
||||
*/
|
||||
static inline ssize_t
|
||||
cpumap_print_list_to_buf(char *buf, const struct cpumask *mask,
|
||||
|
||||
@ -14,7 +14,7 @@
|
||||
* @start: the start point of the iteration
|
||||
* @wrap: assume @n crossing @start terminates the iteration
|
||||
*
|
||||
* Returns >= nr_cpu_ids on completion
|
||||
* Return: >= nr_cpu_ids on completion
|
||||
*
|
||||
* Note: the @wrap argument is required for the start condition when
|
||||
* we cannot assume @start is set in @mask.
|
||||
@ -48,8 +48,9 @@ EXPORT_SYMBOL(cpumask_next_wrap);
|
||||
* @node: memory node from which to allocate or %NUMA_NO_NODE
|
||||
*
|
||||
* Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
|
||||
* a nop returning a constant 1 (in <linux/cpumask.h>)
|
||||
* Returns TRUE if memory allocation succeeded, FALSE otherwise.
|
||||
* a nop returning a constant 1 (in <linux/cpumask.h>).
|
||||
*
|
||||
* Return: TRUE if memory allocation succeeded, FALSE otherwise.
|
||||
*
|
||||
* In addition, mask will be NULL if this fails. Note that gcc is
|
||||
* usually smart enough to know that mask can never be NULL if
|
||||
@ -115,7 +116,7 @@ void __init free_bootmem_cpumask_var(cpumask_var_t mask)
|
||||
* @i: index number
|
||||
* @node: local numa_node
|
||||
*
|
||||
* Returns online CPU according to a numa aware policy; local cpus are returned
|
||||
* Return: online CPU according to a numa aware policy; local cpus are returned
|
||||
* first, followed by non-local ones, then it wraps around.
|
||||
*
|
||||
* For those who wants to enumerate all CPUs based on their NUMA distances,
|
||||
@ -165,7 +166,7 @@ static DEFINE_PER_CPU(int, distribute_cpu_mask_prev);
|
||||
* Iterated calls using the same srcp1 and srcp2 will be distributed within
|
||||
* their intersection.
|
||||
*
|
||||
* Returns >= nr_cpu_ids if the intersection is empty.
|
||||
* Return: >= nr_cpu_ids if the intersection is empty.
|
||||
*/
|
||||
unsigned int cpumask_any_and_distribute(const struct cpumask *src1p,
|
||||
const struct cpumask *src2p)
|
||||
@ -184,6 +185,12 @@ unsigned int cpumask_any_and_distribute(const struct cpumask *src1p,
|
||||
}
|
||||
EXPORT_SYMBOL(cpumask_any_and_distribute);
|
||||
|
||||
/**
|
||||
* cpumask_any_distribute - Return an arbitrary cpu from srcp
|
||||
* @srcp: &cpumask for selection
|
||||
*
|
||||
* Return: >= nr_cpu_ids if the intersection is empty.
|
||||
*/
|
||||
unsigned int cpumask_any_distribute(const struct cpumask *srcp)
|
||||
{
|
||||
unsigned int next, prev;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user