[PATCH] kconfig: add config and source entry details

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From: Prasad Pandit <pjp@xxxxxxxxxxxxxxxxx>

Add details to the 'config' and 'source' entry description.
It'd come handy during path reviews for Kconfig source files.

Signed-off-by: Prasad Pandit <pjp@xxxxxxxxxxxxxxxxx>
---
 Documentation/kbuild/kconfig-language.rst | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/Documentation/kbuild/kconfig-language.rst b/Documentation/kbuild/kconfig-language.rst
index 0135905c0aa3..0783850d5a00 100644
--- a/Documentation/kbuild/kconfig-language.rst
+++ b/Documentation/kbuild/kconfig-language.rst
@@ -39,11 +39,14 @@ them. A single configuration option is defined like this::
 	  kernel.  ...
 
 Every line starts with a key word and can be followed by multiple
-arguments.  "config" starts a new config entry. The following lines
-define attributes for this config option. Attributes can be the type of
-the config option, input prompt, dependencies, help text and default
-values. A config option can be defined multiple times with the same
-name, but every definition can have only a single input prompt and the
+arguments.  "config" starts a new config entry. The following lines,
+indented by a leading tab (\t) character, define attributes for this
+config option. Attributes can be the type of the config option,
+input prompt, dependencies, default values and help text. Help text
+is further indented by two more spaces.
+
+A config option can be defined multiple times with the same name,
+but every definition can have only a single input prompt and the
 type must not conflict.
 
 Menu attributes
@@ -451,6 +454,11 @@ source::
 	"source" <prompt>
 
 This reads the specified configuration file. This file is always parsed.
+The specified file path is from the top source directory ($SRCTREE).
+It allows one to source a file from any subdirectory under the source
+tree. Such path is always unique under the source directory.
+A configuration file must terminate with a new line (\n) character
+at the end.
 
 mainmenu::
 
-- 
2.44.0





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