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path: root/drivers/firmware/memmap.c
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Diffstat (limited to 'drivers/firmware/memmap.c')
-rw-r--r--drivers/firmware/memmap.c57
1 files changed, 36 insertions, 21 deletions
diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c
index 56f9234781f..20f645743ea 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;
}