[PATCH v2 4/4] x86, mwaitt: add documents of delay option

[Huang Rui <ray.huang@amd.com>]

This patch adds a description in the kerenel parameters documentation
for "delay=" method. The default case is TSC delay.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 Documentation/kernel-parameters.txt |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 89ebe00..deca146 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -867,6 +867,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			Defaults to the default architecture's huge page size
 			if not specified.
 
+	delay=		[X86]
+			Format: { "tsc", "loop", "mwaitx" }
+			tsc	use tsc delay method
+			loop	use loop delay method
+			mwaitx	use mwaitx delay method
+			default: tsc.
+
 	dhash_entries=	[KNL]
 			Set number of hash buckets for dentry cache.
 
-- 
1.7.9.5