[Beignet] [PATCH] Update README for the command parser in drm kernel.

[Yang Rong]

Signed-off-by: Yang Rong <rong.r.yang at intel.com>
---
 docs/Beignet.mdwn | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/docs/Beignet.mdwn b/docs/Beignet.mdwn
index 1cbffa4..1c6c575 100644
--- a/docs/Beignet.mdwn
+++ b/docs/Beignet.mdwn
@@ -72,6 +72,16 @@ really recent C++11 features, you may expect problems with older compilers. Last
 time I tried, the code breaks ICC 12 and Clang with internal compiler errors
 while compiling anonymous nested lambda functions.
 
+**Note about Linux Kernel**
+* If your beignet don't run correctly, pls check your linux kernel first. Beignet is blocked
+  between some commits of kernel, nearby 3.15 and 3.16. If your kernel include the commit
+  f0a346bdafaf6fc4a51df9ddf1548fd888f860d8, witch enable register whitelist when parse command
+  but not include some register used by beignet, you should also include the commit
+  c9224faa59c3071ecfa2d4b24592f4eb61e57069, or you can disable the parse command by invoke the
+  following command on Ubuntu system:
+
+  `# echo 0 > /sys/module/i915/parameters/enable_cmd_parser`
+
 
 How to build and install
 ------------------------
-- 
1.8.3.2