1 // SPDX-License-Identifier: GPL-2.0
11  * cpumask_next - get the next cpu in a cpumask
19 	/* -1 is a legal arg here. */  in cpumask_next()
20 	if (n != -1)  in cpumask_next()
27  * cpumask_next_and - get the next cpu in *src1p & *src2p
37 	/* -1 is a legal arg here. */  in cpumask_next_and()
38 	if (n != -1)  in cpumask_next_and()
46  * cpumask_any_but - return a "random" in a cpumask, but not this one.
47  * @mask: the cpumask to search
50  * Often used to find any cpu but smp_processor_id() in a mask.
53 int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)  in cpumask_any_but()  argument
58 	for_each_cpu(i, mask)  in cpumask_any_but()
66  * cpumask_next_wrap - helper to implement for_each_cpu_wrap
68  * @mask: the cpumask pointer
75  * we cannot assume @start is set in @mask.
77 int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap)  in cpumask_next_wrap()  argument
82 	next = cpumask_next(n, mask);  in cpumask_next_wrap()
89 		n = -1;  in cpumask_next_wrap()
100  * alloc_cpumask_var_node - allocate a struct cpumask on a given node
101  * @mask: pointer to cpumask_var_t where the cpumask is returned
102  * @flags: GFP_ flags
108  * In addition, mask will be NULL if this fails.  Note that gcc is
109  * usually smart enough to know that mask can never be NULL if
113 bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)  in alloc_cpumask_var_node()  argument
115 	*mask = kmalloc_node(cpumask_size(), flags, node);  in alloc_cpumask_var_node()
118 	if (!*mask) {  in alloc_cpumask_var_node()
124 	return *mask != NULL;  in alloc_cpumask_var_node()
128 bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)  in zalloc_cpumask_var_node()  argument
130 	return alloc_cpumask_var_node(mask, flags | __GFP_ZERO, node);  in zalloc_cpumask_var_node()
135  * alloc_cpumask_var - allocate a struct cpumask
136  * @mask: pointer to cpumask_var_t where the cpumask is returned
137  * @flags: GFP_ flags
144 bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)  in alloc_cpumask_var()  argument
146 	return alloc_cpumask_var_node(mask, flags, NUMA_NO_NODE);  in alloc_cpumask_var()
150 bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)  in zalloc_cpumask_var()  argument
152 	return alloc_cpumask_var(mask, flags | __GFP_ZERO);  in zalloc_cpumask_var()
157  * alloc_bootmem_cpumask_var - allocate a struct cpumask from the bootmem arena.
158  * @mask: pointer to cpumask_var_t where the cpumask is returned
162  * Either returns an allocated (zero-filled) cpumask, or causes the
165 void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask)  in alloc_bootmem_cpumask_var()  argument
167 	*mask = memblock_alloc(cpumask_size(), SMP_CACHE_BYTES);  in alloc_bootmem_cpumask_var()
168 	if (!*mask)  in alloc_bootmem_cpumask_var()
174  * free_cpumask_var - frees memory allocated for a struct cpumask.
175  * @mask: cpumask to free
177  * This is safe on a NULL mask.
179 void free_cpumask_var(cpumask_var_t mask)  in free_cpumask_var()  argument
181 	kfree(mask);  in free_cpumask_var()
186  * free_bootmem_cpumask_var - frees result of alloc_bootmem_cpumask_var
187  * @mask: cpumask to free
189 void __init free_bootmem_cpumask_var(cpumask_var_t mask)  in free_bootmem_cpumask_var()  argument
191 	memblock_free_early(__pa(mask), cpumask_size());  in free_bootmem_cpumask_var()
196  * cpumask_local_spread - select the i'th cpu with local numa cpu's first
201  * local cpus are returned first, followed by non-local ones, then it
215 			if (i-- == 0)  in cpumask_local_spread()
220 			if (i-- == 0)  in cpumask_local_spread()
228 			if (i-- == 0)  in cpumask_local_spread()