diff options
| author | Greg Kroah-Hartman <gregkh@suse.de> | 2006-04-27 14:10:12 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-21 12:40:47 -0700 |
| commit | c18f6365fdbaf30611a8822afcd7097865dcaa32 (patch) | |
| tree | fb136fffab80d3022edcc4fc17b3da789eb7b838 /Documentation/ABI/testing | |
| parent | 183bd5b3da82b80920c30c4772222df8027fc364 (diff) | |
[PATCH] Add kernel<->userspace ABI stability documentation
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class | 16 | ||||
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices | 25 |
2 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class b/Documentation/ABI/testing/sysfs-class new file mode 100644 index 000000000000..4b0cb891e46e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class @@ -0,0 +1,16 @@ +What: /sys/class/ +Date: Febuary 2006 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + The /sys/class directory will consist of a group of + subdirectories describing individual classes of devices + in the kernel. The individual directories will consist + of either subdirectories, or symlinks to other + directories. + + All programs that use this directory tree must be able + to handle both subdirectories or symlinks in order to + work properly. + +Users: + udev <linux-hotplug-devel@lists.sourceforge.net> diff --git a/Documentation/ABI/testing/sysfs-devices b/Documentation/ABI/testing/sysfs-devices new file mode 100644 index 000000000000..6a25671ee5f6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices @@ -0,0 +1,25 @@ +What: /sys/devices +Date: February 2006 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + The /sys/devices tree contains a snapshot of the + internal state of the kernel device tree. Devices will + be added and removed dynamically as the machine runs, + and between different kernel versions, the layout of the + devices within this tree will change. + + Please do not rely on the format of this tree because of + this. If a program wishes to find different things in + the tree, please use the /sys/class structure and rely + on the symlinks there to point to the proper location + within the /sys/devices tree of the individual devices. + Or rely on the uevent messages to notify programs of + devices being added and removed from this tree to find + the location of those devices. + + Note that sometimes not all devices along the directory + chain will have emitted uevent messages, so userspace + programs must be able to handle such occurrences. + +Users: + udev <linux-hotplug-devel@lists.sourceforge.net> |