diff options
Diffstat (limited to 'mm/slab.c')
| -rw-r--r-- | mm/slab.c | 124 |
1 files changed, 0 insertions, 124 deletions
@@ -3440,130 +3440,6 @@ void *__kmalloc_track_caller(size_t size, gfp_t flags, void *caller) EXPORT_SYMBOL(__kmalloc_track_caller); #endif -#ifdef CONFIG_SMP -/** - * percpu_depopulate - depopulate per-cpu data for given cpu - * @__pdata: per-cpu data to depopulate - * @cpu: depopulate per-cpu data for this cpu - * - * Depopulating per-cpu data for a cpu going offline would be a typical - * use case. You need to register a cpu hotplug handler for that purpose. - */ -void percpu_depopulate(void *__pdata, int cpu) -{ - struct percpu_data *pdata = __percpu_disguise(__pdata); - if (pdata->ptrs[cpu]) { - kfree(pdata->ptrs[cpu]); - pdata->ptrs[cpu] = NULL; - } -} -EXPORT_SYMBOL_GPL(percpu_depopulate); - -/** - * percpu_depopulate_mask - depopulate per-cpu data for some cpu's - * @__pdata: per-cpu data to depopulate - * @mask: depopulate per-cpu data for cpu's selected through mask bits - */ -void __percpu_depopulate_mask(void *__pdata, cpumask_t *mask) -{ - int cpu; - for_each_cpu_mask(cpu, *mask) - percpu_depopulate(__pdata, cpu); -} -EXPORT_SYMBOL_GPL(__percpu_depopulate_mask); - -/** - * percpu_populate - populate per-cpu data for given cpu - * @__pdata: per-cpu data to populate further - * @size: size of per-cpu object - * @gfp: may sleep or not etc. - * @cpu: populate per-data for this cpu - * - * Populating per-cpu data for a cpu coming online would be a typical - * use case. You need to register a cpu hotplug handler for that purpose. - * Per-cpu object is populated with zeroed buffer. - */ -void *percpu_populate(void *__pdata, size_t size, gfp_t gfp, int cpu) -{ - struct percpu_data *pdata = __percpu_disguise(__pdata); - int node = cpu_to_node(cpu); - - BUG_ON(pdata->ptrs[cpu]); - if (node_online(node)) { - /* FIXME: kzalloc_node(size, gfp, node) */ - pdata->ptrs[cpu] = kmalloc_node(size, gfp, node); - if (pdata->ptrs[cpu]) - memset(pdata->ptrs[cpu], 0, size); - } else - pdata->ptrs[cpu] = kzalloc(size, gfp); - return pdata->ptrs[cpu]; -} -EXPORT_SYMBOL_GPL(percpu_populate); - -/** - * percpu_populate_mask - populate per-cpu data for more cpu's - * @__pdata: per-cpu data to populate further - * @size: size of per-cpu object - * @gfp: may sleep or not etc. - * @mask: populate per-cpu data for cpu's selected through mask bits - * - * Per-cpu objects are populated with zeroed buffers. - */ -int __percpu_populate_mask(void *__pdata, size_t size, gfp_t gfp, - cpumask_t *mask) -{ - cpumask_t populated = CPU_MASK_NONE; - int cpu; - - for_each_cpu_mask(cpu, *mask) - if (unlikely(!percpu_populate(__pdata, size, gfp, cpu))) { - __percpu_depopulate_mask(__pdata, &populated); - return -ENOMEM; - } else - cpu_set(cpu, populated); - return 0; -} -EXPORT_SYMBOL_GPL(__percpu_populate_mask); - -/** - * percpu_alloc_mask - initial setup of per-cpu data - * @size: size of per-cpu object - * @gfp: may sleep or not etc. - * @mask: populate per-data for cpu's selected through mask bits - * - * Populating per-cpu data for all online cpu's would be a typical use case, - * which is simplified by the percpu_alloc() wrapper. - * Per-cpu objects are populated with zeroed buffers. - */ -void *__percpu_alloc_mask(size_t size, gfp_t gfp, cpumask_t *mask) -{ - void *pdata = kzalloc(sizeof(struct percpu_data), gfp); - void *__pdata = __percpu_disguise(pdata); - - if (unlikely(!pdata)) - return NULL; - if (likely(!__percpu_populate_mask(__pdata, size, gfp, mask))) - return __pdata; - kfree(pdata); - return NULL; -} -EXPORT_SYMBOL_GPL(__percpu_alloc_mask); - -/** - * percpu_free - final cleanup of per-cpu data - * @__pdata: object to clean up - * - * We simply clean up any per-cpu object left. No need for the client to - * track and specify through a bis mask which per-cpu objects are to free. - */ -void percpu_free(void *__pdata) -{ - __percpu_depopulate_mask(__pdata, &cpu_possible_map); - kfree(__percpu_disguise(__pdata)); -} -EXPORT_SYMBOL_GPL(percpu_free); -#endif /* CONFIG_SMP */ - /** * kmem_cache_free - Deallocate an object * @cachep: The cache the allocation was from. |