linux-kernel - [PATCH] Documentation/admin-guide: mark memmap parameter is supported by a few architectures

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Date:   Wed, 18 Nov 2020 14:41:45 +1300
From:   Barry Song <song.bao.hua@...ilicon.com>
To:     <corbet@....net>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <linuxarm@...wei.com>, Barry Song <song.bao.hua@...ilicon.com>
Subject: [PATCH] Documentation/admin-guide: mark memmap parameter is supported by a few architectures

early_param memmap is only implemented on X86, MIPS and XTENSA. To avoid
wasting users’ time on trying this on platform like ARM, mark it clearly.

Signed-off-by: Barry Song <song.bao.hua@...ilicon.com>
---
 * the background was that I spent one hour on using memmap on arm64, only
   to find memmap= is not implemented on most architectures;

 Documentation/admin-guide/kernel-parameters.rst | 1 +
 Documentation/admin-guide/kernel-parameters.txt | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst
index 6d421694d98e..06fb1b4aa849 100644
--- a/Documentation/admin-guide/kernel-parameters.rst
+++ b/Documentation/admin-guide/kernel-parameters.rst
@@ -172,6 +172,7 @@ parameter is applicable::
 	X86	Either 32-bit or 64-bit x86 (same as X86-32+X86-64)
 	X86_UV	SGI UV support is enabled.
 	XEN	Xen support is enabled
+	XTENSA	xtensa architecture is enabled.
 
 In addition, the following text indicates that the option::
 
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 526d65d8573a..8bdbc555f221 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2709,7 +2709,7 @@
 			option description.
 
 	memmap=nn[KMG]@ss[KMG]
-			[KNL] Force usage of a specific region of memory.
+			[KNL, X86, MIPS, XTENSA] Force usage of a specific region of memory.
 			Region of memory to be used is from ss to ss+nn.
 			If @ss[KMG] is omitted, it is equivalent to mem=nn[KMG],
 			which limits max address to nn[KMG].
-- 
2.25.1