diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/firmware/memmap.c | 57 |
1 files changed, 36 insertions, 21 deletions
diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c index 56f9234..20f6457 100644 --- a/drivers/firmware/memmap.c +++ b/drivers/firmware/memmap.c @@ -122,29 +122,53 @@ static int firmware_map_add_entry(u64 start, u64 end, return 0; } +/* + * Add memmap entry on sysfs + */ +static int add_sysfs_fw_map_entry(struct firmware_map_entry *entry) +{ + static int map_entries_nr; + static struct kset *mmap_kset; + + if (!mmap_kset) { + mmap_kset = kset_create_and_add("memmap", NULL, firmware_kobj); + if (!mmap_kset) + return -ENOMEM; + } + + entry->kobj.kset = mmap_kset; + if (kobject_add(&entry->kobj, NULL, "%d", map_entries_nr++)) + kobject_put(&entry->kobj); + + return 0; +} + /** - * firmware_map_add() - Adds a firmware mapping entry. + * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do + * memory hotplug. * @start: Start of the memory range. * @end: End of the memory range (inclusive). * @type: Type of the memory range. * - * This function uses kmalloc() for memory - * allocation. Use firmware_map_add_early() if you want to use the bootmem - * allocator. - * - * That function must be called before late_initcall. + * Adds a firmware mapping entry. This function is for memory hotplug, it is + * similar to function firmware_map_add_early(). The only difference is that + * it will create the syfs entry dynamically. * * Returns 0 on success, or -ENOMEM if no memory could be allocated. **/ -int firmware_map_add(u64 start, u64 end, const char *type) +int __meminit firmware_map_add_hotplug(u64 start, u64 end, const char *type) { struct firmware_map_entry *entry; - entry = kmalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC); + entry = kzalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC); if (!entry) return -ENOMEM; - return firmware_map_add_entry(start, end, type, entry); + firmware_map_add_entry(start, end, type, entry); + /* create the memmap entry */ + add_sysfs_fw_map_entry(entry); + + return 0; } /** @@ -154,7 +178,7 @@ int firmware_map_add(u64 start, u64 end, const char *type) * @type: Type of the memory range. * * Adds a firmware mapping entry. This function uses the bootmem allocator - * for memory allocation. Use firmware_map_add() if you want to use kmalloc(). + * for memory allocation. * * That function must be called before late_initcall. * @@ -214,19 +238,10 @@ static ssize_t memmap_attr_show(struct kobject *kobj, */ static int __init memmap_init(void) { - int i = 0; struct firmware_map_entry *entry; - struct kset *memmap_kset; - - memmap_kset = kset_create_and_add("memmap", NULL, firmware_kobj); - if (WARN_ON(!memmap_kset)) - return -ENOMEM; - list_for_each_entry(entry, &map_entries, list) { - entry->kobj.kset = memmap_kset; - if (kobject_add(&entry->kobj, NULL, "%d", i++)) - kobject_put(&entry->kobj); - } + list_for_each_entry(entry, &map_entries, list) + add_sysfs_fw_map_entry(entry); return 0; } |