diff options
| author | Nathan Fontenot <nfont@austin.ibm.com> | 2010-10-19 12:46:19 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 10:16:44 -0700 |
| commit | 07681215975e05a1454b0afdeef07deb0db626ee (patch) | |
| tree | 87caa0a9fd41f9e6cb323d52cf0f75036ea1ad2a | |
| parent | 2938ffbd466d2811a6012609684a2298eef35065 (diff) | |
Driver core: Add section count to memory_block struct
Add a section count property to the memory_block struct to track the number
of memory sections that have been added/removed from a memory block. This
allows us to know when the last memory section of a memory block has been
removed so we can remove the memory block.
Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Reviewed-by: Robin Holt <holt@sgi.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/base/memory.c | 17 | ||||
| -rw-r--r-- | include/linux/memory.h | 2 |
2 files changed, 13 insertions, 6 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 5185bcff2de..cafeaaf0428 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -490,6 +490,7 @@ static int add_memory_block(int nid, struct mem_section *section, mem->phys_index = __section_nr(section); mem->state = state; + mem->section_count++; mutex_init(&mem->state_mutex); start_pfn = section_nr_to_pfn(mem->phys_index); mem->phys_device = arch_get_memory_phys_device(start_pfn); @@ -519,12 +520,16 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section, mutex_lock(&mem_sysfs_mutex); mem = find_memory_block(section); - unregister_mem_sect_under_nodes(mem); - mem_remove_simple_file(mem, phys_index); - mem_remove_simple_file(mem, state); - mem_remove_simple_file(mem, phys_device); - mem_remove_simple_file(mem, removable); - unregister_memory(mem, section); + + mem->section_count--; + if (mem->section_count == 0) { + unregister_mem_sect_under_nodes(mem); + mem_remove_simple_file(mem, phys_index); + mem_remove_simple_file(mem, state); + mem_remove_simple_file(mem, phys_device); + mem_remove_simple_file(mem, removable); + unregister_memory(mem, section); + } mutex_unlock(&mem_sysfs_mutex); return 0; diff --git a/include/linux/memory.h b/include/linux/memory.h index c4f3127dbd4..06c1fa0a5c7 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -23,6 +23,8 @@ struct memory_block { unsigned long phys_index; unsigned long state; + int section_count; + /* * This serializes all state change requests. It isn't * held during creation because the control files are |