projects/linux·commit ff7ea79c

mm: create /sys/kernel/mm

ff7ea79c · Nishanth Aravamudan <[email protected]> · 2008-07-23 21:27:39 -07:00

Add a kobject to create /sys/kernel/mm when sysfs is mounted.  The kobject
will exist regardless.  This will allow for the hugepage related sysfs
directories to exist under the mm "subsystem" directory.  Add an ABI file
appropriately.

[[email protected]: fix build]
Signed-off-by: Nishanth Aravamudan <[email protected]>
Cc: Nick Piggin <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: KOSAKI Motohiro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Commit
ff7ea79cf7c3a481851bd4b2185fdeb6ce4afa29
Parents
5e9426ab

Changes

3 files changed · +24 −0

FileStatusAddDelContent
Documentation/ABI/testing/sysfs-kernel-mmadded+6−0View file
include/linux/kobject.hmodified+2−0View file
mm/mm_init.cmodified+16−0View file

Documentation/ABI/testing/sysfs-kernel-mm

View file
diff --git a/Documentation/ABI/testing/sysfs-kernel-mm b/Documentation/ABI/testing/sysfs-kernel-mm
new file mode 100644
index 0000000..190d523
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-mm
@@ -0,0 +1,6 @@
+What: /sys/kernel/mm
+Date: July 2008
+Contact: Nishanth Aravamudan <[email protected]>, VM maintainers
+Description:
+ /sys/kernel/mm/ should contain any and all VM
+ related information in /sys/kernel/.

include/linux/kobject.h

View file
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 60f0d41..5437ac0 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -186,6 +186,8 @@ extern struct kobject *kset_find_obj(struct kset *, const char *);
/* The global /sys/kernel/ kobject for people to chain off of */
extern struct kobject *kernel_kobj;
+/* The global /sys/kernel/mm/ kobject for people to chain off of */
+extern struct kobject *mm_kobj;
/* The global /sys/hypervisor/ kobject for people to chain off of */
extern struct kobject *hypervisor_kobj;
/* The global /sys/power/ kobject for people to chain off of */

mm/mm_init.c

View file
diff --git a/mm/mm_init.c b/mm/mm_init.c
index eaf0d3b..c6af41e 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -7,6 +7,8 @@
*/
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/kobject.h>
+#include <linux/module.h>
#include "internal.h"
#ifdef CONFIG_DEBUG_MEMORY_INIT
@@ -134,3 +136,17 @@ static __init int set_mminit_loglevel(char *str)
}
early_param("mminit_loglevel", set_mminit_loglevel);
#endif /* CONFIG_DEBUG_MEMORY_INIT */
+
+struct kobject *mm_kobj;
+EXPORT_SYMBOL_GPL(mm_kobj);
+
+static int __init mm_sysfs_init(void)
+{
+ mm_kobj = kobject_create_and_add("mm", kernel_kobj);
+ if (!mm_kobj)
+ return -ENOMEM;
+
+ return 0;
+}
+
+__initcall(mm_sysfs_init);