[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 c8bce82..89b1d19 100644
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -246,6 +246,7 @@
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 @@
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/.
