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memory-hotplug: create /sys/firmware/memmap entry for new memory

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A memmap is a directory in sysfs which includes 3 text files: start, end
and type.  For example:

start: 	0x100000
end:	0x7e7b1cff
type:	System RAM

Interface firmware_map_add was not called explicitly.  Remove it and add
function firmware_map_add_hotplug as hotplug interface of memmap.

Each memory entry has a memmap in sysfs, When we hot-add new memory, sysfs
does not export memmap entry for it.  We add a call in function add_memory
to function firmware_map_add_hotplug.

Add a new function add_sysfs_fw_map_entry() to create memmap entry, it
will be called when initialize memmap and hot-add memory.

[akpm@linux-foundation.org: un-kernedoc a no longer kerneldoc comment]
Signed-off-by: Shaohui Zheng <shaohui.zheng@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
akpm@linux-foundation.org
2010-03-05 13:41:58 -08:00
committed by Linus Torvalds
parent 9d8cebd4bc
commit d96ae53091
3 changed files with 43 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/firmware-map.h
View File

@@ -24,17 +24,17 @@
*/
#ifdef CONFIG_FIRMWARE_MEMMAP
int firmware_map_add(u64 start, u64 end, const char *type);
int firmware_map_add_early(u64 start, u64 end, const char *type);
int firmware_map_add_hotplug(u64 start, u64 end, const char *type);
#else /* CONFIG_FIRMWARE_MEMMAP */
static inline int firmware_map_add(u64 start, u64 end, const char *type)
static inline int firmware_map_add_early(u64 start, u64 end, const char *type)
{
return 0;
}
static inline int firmware_map_add_early(u64 start, u64 end, const char *type)
static inline int firmware_map_add_hotplug(u64 start, u64 end, const char *type)
{
return 0;
}