drivers/base/memory: clarify adding and removing of memory blocks
Let's make it clearer at which places we actually add and remove memory blocks -- streamlining the terminology -- and highlight which memory block start out online and which start out as offline. * rename add_memory_block -> add_boot_memory_block * rename init_memory_block -> add_memory_block * rename unregister_memory -> remove_memory_block * rename register_memory -> __add_memory_block * add add_hotplug_memory_block * mark add_boot_memory_block with __init (suggested by Oscar) __add_memory_block() is a pure helper for add_memory_block(), remove the somewhat obvious comment. Link: https://lkml.kernel.org/r/20220221154531.11382-1-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -619,11 +619,7 @@ static const struct attribute_group *memory_memblk_attr_groups[] = {
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NULL,
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};
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/*
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* register_memory - Setup a sysfs device for a memory block
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*/
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static
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int register_memory(struct memory_block *memory)
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static int __add_memory_block(struct memory_block *memory)
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{
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int ret;
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@ -723,9 +719,9 @@ void memory_block_add_nid(struct memory_block *mem, int nid,
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}
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#endif
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static int init_memory_block(unsigned long block_id, unsigned long state,
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unsigned long nr_vmemmap_pages,
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struct memory_group *group)
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static int add_memory_block(unsigned long block_id, unsigned long state,
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unsigned long nr_vmemmap_pages,
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struct memory_group *group)
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{
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struct memory_block *mem;
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int ret = 0;
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@ -756,7 +752,7 @@ static int init_memory_block(unsigned long block_id, unsigned long state,
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mem->zone = early_node_zone_for_memory_block(mem, NUMA_NO_NODE);
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#endif /* CONFIG_NUMA */
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ret = register_memory(mem);
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ret = __add_memory_block(mem);
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if (ret)
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return ret;
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@ -768,7 +764,7 @@ static int init_memory_block(unsigned long block_id, unsigned long state,
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return 0;
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}
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static int add_memory_block(unsigned long base_section_nr)
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static int __init add_boot_memory_block(unsigned long base_section_nr)
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{
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int section_count = 0;
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unsigned long nr;
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@ -780,11 +776,18 @@ static int add_memory_block(unsigned long base_section_nr)
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if (section_count == 0)
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return 0;
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return init_memory_block(memory_block_id(base_section_nr),
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MEM_ONLINE, 0, NULL);
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return add_memory_block(memory_block_id(base_section_nr),
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MEM_ONLINE, 0, NULL);
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}
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static void unregister_memory(struct memory_block *memory)
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static int add_hotplug_memory_block(unsigned long block_id,
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unsigned long nr_vmemmap_pages,
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struct memory_group *group)
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{
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return add_memory_block(block_id, MEM_OFFLINE, nr_vmemmap_pages, group);
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}
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static void remove_memory_block(struct memory_block *memory)
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{
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if (WARN_ON_ONCE(memory->dev.bus != &memory_subsys))
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return;
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@ -823,8 +826,7 @@ int create_memory_block_devices(unsigned long start, unsigned long size,
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return -EINVAL;
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for (block_id = start_block_id; block_id != end_block_id; block_id++) {
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ret = init_memory_block(block_id, MEM_OFFLINE, vmemmap_pages,
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group);
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ret = add_hotplug_memory_block(block_id, vmemmap_pages, group);
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if (ret)
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break;
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}
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@ -835,7 +837,7 @@ int create_memory_block_devices(unsigned long start, unsigned long size,
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mem = find_memory_block_by_id(block_id);
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if (WARN_ON_ONCE(!mem))
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continue;
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unregister_memory(mem);
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remove_memory_block(mem);
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}
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}
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return ret;
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@ -864,7 +866,7 @@ void remove_memory_block_devices(unsigned long start, unsigned long size)
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if (WARN_ON_ONCE(!mem))
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continue;
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unregister_memory_block_under_nodes(mem);
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unregister_memory(mem);
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remove_memory_block(mem);
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}
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}
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@ -924,7 +926,7 @@ void __init memory_dev_init(void)
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*/
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for (nr = 0; nr <= __highest_present_section_nr;
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nr += sections_per_block) {
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ret = add_memory_block(nr);
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ret = add_boot_memory_block(nr);
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if (ret)
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panic("%s() failed to add memory block: %d\n", __func__,
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ret);
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