From e51710d1efd406890285907876ad20ec787394b3 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Fri, 17 Jul 2015 19:24:15 +0200
Subject: file-systems: Add a 'dependencies' field to <file-system>.

* gnu/system/file-systems.scm (<file-system>)[dependencies]: New field.
* gnu/system.scm (other-file-system-services)[requirements]: Honor
  'file-system-dependencies'.
* doc/guix.texi (File Systems): Document it.
---
 doc/guix.texi | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'doc/guix.texi')

diff --git a/doc/guix.texi b/doc/guix.texi
index 2f8c52c8b6..0d24b12f8c 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5027,6 +5027,14 @@ errors before being mounted.
 @item @code{create-mount-point?} (default: @code{#f})
 When true, the mount point is created if it does not exist yet.
 
+@item @code{dependencies} (default: @code{'()})
+This is a list of @code{<file-system>} objects representing file systems
+that must be mounted before (and unmounted after) this one.
+
+As an example, consider a hierarchy of mounts: @file{/sys/fs/cgroup} is
+a dependency of @file{/sys/fs/cgroup/cpu} and
+@file{/sys/fs/cgroup/memory}.
+
 @end table
 @end deftp
 
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