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authorakpm@linux-foundation.org <akpm@linux-foundation.org>2010-03-05 21:41:58 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-06 19:26:25 (GMT)
commitd96ae5309165d9ed7c008a178238977b73595cd9 (patch)
tree78b169102b718a9489fcc41ad4829a646492d2fb /mm/memory_hotplug.c
parent9d8cebd4bcd7c3878462fdfda34bbcdeb4df7ef4 (diff)
memory-hotplug: create /sys/firmware/memmap entry for new memory
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>
Diffstat (limited to 'mm/memory_hotplug.c')
-rw-r--r--mm/memory_hotplug.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 030ce8a..78e34e6 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -28,6 +28,7 @@
#include <linux/pfn.h>
#include <linux/suspend.h>
#include <linux/mm_inline.h>
+#include <linux/firmware-map.h>
#include <asm/tlbflush.h>
@@ -523,6 +524,9 @@ int __ref add_memory(int nid, u64 start, u64 size)
BUG_ON(ret);
}
+ /* create new memmap entry */
+ firmware_map_add_hotplug(start, start + size, "System RAM");
+
goto out;
error:

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