Add the document for the change of extended movable_node=nn[KMG]@ss[KMG].

Cc: Jonathan Corbet <cor...@lwn.net>
Cc: linux-...@vger.kernel.org
Signed-off-by: Chao Fan <fanc.f...@cn.fujitsu.com>
---
 Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt 
b/Documentation/admin-guide/kernel-parameters.txt
index ead7f4066ea4..226560667d84 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2332,6 +2332,15 @@
                        allocations which rules out almost all kernel
                        allocations. Use with caution!
 
+       movable_node=nn[KMG]@ss[KMG]
+                       [KNL] Force usage of a specific region of memory.
+                       Extend movable_node to work well with KASLR.
+                       Region of memory in immovable node is from ss to ss+nn.
+                       Multiple regions can be specified, comma delimited.
+                       Notice: we support 4 regions at most now.
+                       Example:
+                       movable_node=100M@2G,1G@4G
+
        MTD_Partition=  [MTD]
                        Format: <name>,<region-number>,<size>,<offset>
 
-- 
2.13.6



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