[PATCH] Documentation:openrisc: Add build instructions with initramfs

[Ann Yun]

Mention how to include initramfs when building the kernel

Signed-off-by: Ann Yun <by.ann.yun@xxxxxxxxx>
---
 Documentation/arch/openrisc/openrisc_port.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/arch/openrisc/openrisc_port.rst b/Documentation/arch/openrisc/openrisc_port.rst
index a8f307a3b499..4ab28879d7ed 100644
--- a/Documentation/arch/openrisc/openrisc_port.rst
+++ b/Documentation/arch/openrisc/openrisc_port.rst
@@ -40,6 +40,10 @@ Build the Linux kernel as usual::
 	make ARCH=openrisc CROSS_COMPILE="or1k-linux-" defconfig
 	make ARCH=openrisc CROSS_COMPILE="or1k-linux-"
 
+If you want to embed initramfs in the kernel, also pass ``CONFIG_INITRAMFS_SOURCE``. For example::
+
+	make ARCH=openrisc CROSS_COMPILE="or1k-linux-" CONFIG_INITRAMFS_SOURCE="path/to/rootfs path/to/devnodes"
+
 3) Running on FPGA (optional)
 
 The OpenRISC community typically uses FuseSoC to manage building and programming
-- 
2.37.2