diff options
Diffstat (limited to 'drivers/firmware/memmap.c')
| -rw-r--r-- | drivers/firmware/memmap.c | 54 |
1 files changed, 28 insertions, 26 deletions
diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c index e2e04b007e15..55b9cfad8a04 100644 --- a/drivers/firmware/memmap.c +++ b/drivers/firmware/memmap.c @@ -1,17 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/firmware/memmap.c * Copyright (C) 2008 SUSE LINUX Products GmbH * by Bernhard Walle <bernhard.walle@gmx.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License v2.0 as published by - * the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/string.h> @@ -19,7 +10,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/types.h> -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/slab.h> #include <linux/mm.h> @@ -78,6 +69,7 @@ static struct attribute *def_attrs[] = { &memmap_type_attr.attr, NULL }; +ATTRIBUTE_GROUPS(def); static const struct sysfs_ops memmap_attr_ops = { .show = memmap_attr_show, @@ -124,10 +116,10 @@ static void __meminit release_firmware_map_entry(struct kobject *kobj) kfree(entry); } -static struct kobj_type __refdata memmap_ktype = { +static const struct kobj_type memmap_ktype = { .release = release_firmware_map_entry, .sysfs_ops = &memmap_attr_ops, - .default_attrs = def_attrs, + .default_groups = def_groups, }; /* @@ -144,7 +136,9 @@ static struct kobj_type __refdata memmap_ktype = { * * Common implementation of firmware_map_add() and firmware_map_add_early() * which expects a pre-allocated struct firmware_map_entry. - **/ + * + * Return: 0 always + */ static int firmware_map_add_entry(u64 start, u64 end, const char *type, struct firmware_map_entry *entry) @@ -170,7 +164,7 @@ static int firmware_map_add_entry(u64 start, u64 end, * @entry: removed entry. * * The caller must hold map_entries_lock, and release it properly. - **/ + */ static inline void firmware_map_remove_entry(struct firmware_map_entry *entry) { list_del(&entry->list); @@ -184,6 +178,9 @@ static int add_sysfs_fw_map_entry(struct firmware_map_entry *entry) static int map_entries_nr; static struct kset *mmap_kset; + if (entry->kobj.state_in_sysfs) + return -EEXIST; + if (!mmap_kset) { mmap_kset = kset_create_and_add("memmap", NULL, firmware_kobj); if (!mmap_kset) @@ -205,7 +202,7 @@ static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry) kobject_put(&entry->kobj); } -/* +/** * firmware_map_find_entry_in_list() - Search memmap entry in a given list. * @start: Start of the memory range. * @end: End of the memory range (exclusive). @@ -233,7 +230,7 @@ firmware_map_find_entry_in_list(u64 start, u64 end, const char *type, return NULL; } -/* +/** * firmware_map_find_entry() - Search memmap entry in map_entries. * @start: Start of the memory range. * @end: End of the memory range (exclusive). @@ -251,7 +248,7 @@ firmware_map_find_entry(u64 start, u64 end, const char *type) return firmware_map_find_entry_in_list(start, end, type, &map_entries); } -/* +/** * firmware_map_find_entry_bootmem() - Search memmap entry in map_entries_bootmem. * @start: Start of the memory range. * @end: End of the memory range (exclusive). @@ -280,13 +277,17 @@ firmware_map_find_entry_bootmem(u64 start, u64 end, const char *type) * 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. - **/ + * Return: 0 on success, or -ENOMEM if no memory could be allocated. + */ int __meminit firmware_map_add_hotplug(u64 start, u64 end, const char *type) { struct firmware_map_entry *entry; - entry = firmware_map_find_entry_bootmem(start, end, type); + entry = firmware_map_find_entry(start, end - 1, type); + if (entry) + return 0; + + entry = firmware_map_find_entry_bootmem(start, end - 1, type); if (!entry) { entry = kzalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC); if (!entry) @@ -318,13 +319,14 @@ int __meminit firmware_map_add_hotplug(u64 start, u64 end, const char *type) * * That function must be called before late_initcall. * - * Returns 0 on success, or -ENOMEM if no memory could be allocated. - **/ + * Return: 0 on success, or -ENOMEM if no memory could be allocated. + */ int __init firmware_map_add_early(u64 start, u64 end, const char *type) { struct firmware_map_entry *entry; - entry = alloc_bootmem(sizeof(struct firmware_map_entry)); + entry = memblock_alloc(sizeof(struct firmware_map_entry), + SMP_CACHE_BYTES); if (WARN_ON(!entry)) return -ENOMEM; @@ -339,8 +341,8 @@ int __init firmware_map_add_early(u64 start, u64 end, const char *type) * * removes a firmware mapping entry. * - * Returns 0 on success, or -EINVAL if no entry. - **/ + * Return: 0 on success, or -EINVAL if no entry. + */ int __meminit firmware_map_remove(u64 start, u64 end, const char *type) { struct firmware_map_entry *entry; |