[PATCH 1/3] common: fix help text reference to internal imagicvars

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Both ${global.linux.bootargs.bootm.appendroot} and
${global.linux.bootargs.machine_id} are magic vars internally populated
by barebox to hold the computed root= or systemd.machine_id options.

They are out of place in the help text as they are an implementation
detail and not user API. In the case of CONFIG_MMCBLKDEV_ROOTARG, it's
even incorrect as the help text is talking about what a user can do to
trigger the root= appending and that should be either
global.bootm.appendroot=1 or adding linux-appendroot to the blspec file.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 common/Kconfig | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/common/Kconfig b/common/Kconfig
index fd422714d560..28a89265b386 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -769,7 +769,7 @@ config MMCBLKDEV_ROOTARG
 	  kernel doesn't contain commit [1]. The first linux kernel release
 	  containing that commit is v5.10-rc1.
 
-	  The appending only happens if barebox' 'linux.bootargs.bootm.appendroot'
+	  The appending only happens if barebox' 'global.bootm.appendroot'
 	  variable is set or the used blspec entry contains 'linux-appendroot'.
 
 	  Note: It is crucial that the kernel device tree and the barebox device
@@ -1285,8 +1285,9 @@ config MACHINE_ID
 	  updating barebox the machine id might change.
 
 	  global.bootm.provide_machine_id may be used to automatically set
-	  the linux.bootargs.machine_id global variable with a value of
-	  systemd.machine_id=${global.machine_id}
+	  fix up the kernel command line on boot with 
+
+	    systemd.machine_id=${global.machine_id}
 
 	  Note: if no hashable information is available no machine id will be passed
 	  to the kernel.
-- 
2.47.3