[PATCH v3 4/4] document: change the document for immovable_mem

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Add the document for the change of new parameter
immovable_mem=nn[KMG]@ss[KMG].

Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Chao Fan <fanc.fnst@xxxxxxxxxxxxxx>
---
 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 b74e13312fdc..eea755af697f 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2355,6 +2355,15 @@
 			allocations which rules out almost all kernel
 			allocations. Use with caution!
 
+	immovable_mem=nn[KMG]@ss[KMG]
+			[KNL] Force usage of a specific region of memory.
+			Make memory hotplug  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:
+			immovable_mem=1G,500M@2G,1G@4G
+
 	MTD_Partition=	[MTD]
 			Format: <name>,<region-number>,<size>,<offset>
 
-- 
2.14.3



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