[PATCH] swsusp: document support for swap files

Document the "resume_offset=" command line parameter as well as the way in
which swap files are supported by swsusp.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 2ddc43ef4ded..1e183bd33d71 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1370,6 +1370,12 @@ and is between 256 and 4096 characters. It is defined in the file
         resume=         [SWSUSP]
                         Specify the partition device for software suspend
 
+        resume_offset=  [SWSUSP]
+                        Specify the offset from the beginning of the partition
+                        given by "resume=" at which the swap header is located,
+                        in <PAGE_SIZE> units (needed only for swap files).
+                        See  Documentation/power/swsusp-and-swap-files.txt
+
         rhash_entries=  [KNL,NET]
                         Set number of hash buckets for route cache