[PATCH 1/3] bootconfig: Fix Kconfig help message for BOOT_CONFIG

[Masami Hiramatsu]

Fix Kconfig help message since the bootconfig file is
only available to be appended to initramfs. And also
add a reference to the documentation.

Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
---
 init/Kconfig |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/init/Kconfig b/init/Kconfig
index ffd240fb88c3..9506299a53e3 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1223,7 +1223,9 @@ config BOOT_CONFIG
 	help
 	  Extra boot config allows system admin to pass a config file as
 	  complemental extension of kernel cmdline when booting.
-	  The boot config file is usually attached at the end of initramfs.
+	  The boot config file must be attached at the end of initramfs
+	  with checksum and size.
+	  See <file:Documentation/admin-guide/bootconfig.rst> for details.
 
 	  If unsure, say Y.