static int init_memory_block(struct memory_block **memory, struct mem_section *section, unsigned long state) { struct memory_block *mem; unsigned long start_pfn; int scn_nr; int ret = 0; mem = kzalloc(sizeof(*mem), GFP_KERNEL); if (!mem) return -ENOMEM; scn_nr = __section_nr(section); mem->start_section_nr = base_memory_block_id(scn_nr) * sections_per_block; mem->end_section_nr = mem->start_section_nr + sections_per_block - 1; mem->state = state; start_pfn = section_nr_to_pfn(mem->start_section_nr); mem->phys_device = arch_get_memory_phys_device(start_pfn); ret = register_memory(mem); *memory = mem; return ret; }
/* * A reference for the returned object is held and the reference for the * hinted object is released. */ struct memory_block *find_memory_block_hinted(struct mem_section *section, struct memory_block *hint) { int block_id = base_memory_block_id(__section_nr(section)); struct device *hintdev = hint ? &hint->dev : NULL; struct device *dev; dev = subsys_find_device_by_id(&memory_subsys, block_id, hintdev); if (hint) put_device(&hint->dev); if (!dev) return NULL; return to_memory_block(dev); }
static int init_memory_block(struct memory_block **memory, struct mem_section *section, unsigned long state) { struct memory_block *mem; unsigned long start_pfn; int scn_nr; int ret = 0; mem = kzalloc(sizeof(*mem), GFP_KERNEL); if (!mem) return -ENOMEM; scn_nr = __section_nr(section); mem->start_section_nr = base_memory_block_id(scn_nr) * sections_per_block; mem->end_section_nr = mem->start_section_nr + sections_per_block - 1; mem->state = state; mem->section_count++; mutex_init(&mem->state_mutex); start_pfn = section_nr_to_pfn(mem->start_section_nr); mem->phys_device = arch_get_memory_phys_device(start_pfn); ret = register_memory(mem); if (!ret) ret = mem_create_simple_file(mem, phys_index); if (!ret) ret = mem_create_simple_file(mem, end_phys_index); if (!ret) ret = mem_create_simple_file(mem, state); if (!ret) ret = mem_create_simple_file(mem, phys_device); if (!ret) ret = mem_create_simple_file(mem, removable); *memory = mem; return ret; }