Commit 00a41db5 authored by Badari Pulavarty's avatar Badari Pulavarty Committed by Greg Kroah-Hartman
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driver core: register_memory/unregister_memory clean ups and bugfix

register_memory()/unregister_memory() never gets called with
"root". unregister_memory() is accessing kobject_name of
the object just freed up. Since no one uses the code,
lets take the code out. And also, make register_memory() static.

Another bug fix - before calling unregister_memory()
remove_memory_block() gets a ref on kobject. unregister_memory()
need to drop that ref before calling sysdev_unregister().
Signed-off-by: default avatarBadari Pulavarty <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent da19cbcf
......@@ -62,8 +62,8 @@ void unregister_memory_notifier(struct notifier_block *nb)
* register_memory - Setup a sysfs device for a memory block
int register_memory(struct memory_block *memory, struct mem_section *section,
struct node *root)
int register_memory(struct memory_block *memory, struct mem_section *section)
int error;
......@@ -71,26 +71,18 @@ int register_memory(struct memory_block *memory, struct mem_section *section,
memory-> = __section_nr(section);
error = sysdev_register(&memory->sysdev);
if (root && !error)
error = sysfs_create_link(&root->sysdev.kobj,
return error;
static void
unregister_memory(struct memory_block *memory, struct mem_section *section,
struct node *root)
unregister_memory(struct memory_block *memory, struct mem_section *section)
BUG_ON(memory->sysdev.cls != &memory_sysdev_class);
BUG_ON(memory-> != __section_nr(section));
/* drop the ref. we got in remove_memory_block() */
if (root)
......@@ -345,7 +337,7 @@ static int add_memory_block(unsigned long node_id, struct mem_section *section,
mem->phys_device = phys_device;
ret = register_memory(mem, section, NULL);
ret = register_memory(mem, section);
if (!ret)
ret = mem_create_simple_file(mem, phys_index);
if (!ret)
......@@ -396,7 +388,7 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section,
mem_remove_simple_file(mem, phys_index);
mem_remove_simple_file(mem, state);
mem_remove_simple_file(mem, phys_device);
unregister_memory(mem, section, NULL);
unregister_memory(mem, section);
return 0;
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