[doc] add paragraph about 'fs' subsystem to sysfs.txt

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index c8bce82ddcacdf22e6a7190c204faf154821a619..89b1d196ca80fe3a0dfb4672fe0a36396e14ac32 100644 (file)
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -246,6 +246,7 @@ class/
 devices/
 firmware/
 net/
+fs/
 
 devices/ contains a filesystem representation of the device tree. It maps
 directly to the internal kernel device tree, which is a hierarchy of
@@ -264,6 +265,10 @@ drivers/ contains a directory for each device driver that is loaded
 for devices on that particular bus (this assumes that drivers do not
 span multiple bus types).
 
+fs/ contains a directory for some filesystems.  Currently each
+filesystem wanting to export attributes must create its own hierarchy
+below fs/ (see ./fuse.txt for an example).
+
 
 More information can driver-model specific features can be found in
 Documentation/driver-model/.