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-rw-r--r--gnu/system.scm17
-rw-r--r--gnu/system/file-systems.scm5
2 files changed, 8 insertions, 14 deletions
diff --git a/gnu/system.scm b/gnu/system.scm
index e1ed1a2f19..731f9de55f 100644
--- a/gnu/system.scm
+++ b/gnu/system.scm
@@ -250,23 +250,14 @@ as 'needed-for-boot'."
 (define (operating-system-user-mapped-devices os)
   "Return the subset of mapped devices that can be installed in
 user-land--i.e., those not needed during boot."
-  (let ((devices      (operating-system-mapped-devices os))
-        (file-systems (operating-system-file-systems os)))
-   (filter (lambda (md)
-             (let ((user (mapped-device-user md file-systems)))
-               (or (not user)
-                   (not (file-system-needed-for-boot? user)))))
-           devices)))
+  (remove mapped-device-needed-for-boot?
+          (operating-system-mapped-devices os)))
 
 (define (operating-system-boot-mapped-devices os)
   "Return the subset of mapped devices that must be installed during boot,
 from the initrd."
-  (let ((devices      (operating-system-mapped-devices os))
-        (file-systems (operating-system-file-systems os)))
-   (filter (lambda (md)
-             (let ((user (mapped-device-user md file-systems)))
-               (and user (file-system-needed-for-boot? user))))
-           devices)))
+  (filter mapped-device-needed-for-boot?
+          (operating-system-mapped-devices os)))
 
 (define (device-mapping-services os)
   "Return the list of device-mapping services for OS as a monadic list."
diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm
index 4760821840..356b4826b4 100644
--- a/gnu/system/file-systems.scm
+++ b/gnu/system/file-systems.scm
@@ -45,6 +45,7 @@
             mapped-device-source
             mapped-device-target
             mapped-device-type
+            mapped-device-needed-for-boot?
 
             mapped-device-kind
             mapped-device-kind?
@@ -157,7 +158,9 @@ file system."
   mapped-device?
   (source    mapped-device-source)                ;string
   (target    mapped-device-target)                ;string
-  (type      mapped-device-type))                 ;<mapped-device-kind>
+  (type      mapped-device-type)                  ;<mapped-device-kind>
+  (needed-for-boot? mapped-device-needed-for-boot? ;Boolean
+                    (default #f)))
 
 (define-record-type* <mapped-device-type> mapped-device-kind
   make-mapped-device-kind