checkpatch: describe --min-conf-desc-length

Neither the warning nor the help message gives any hint on the unit for
length: Could be meters, inches, bytes, characters or ...  lines.

Extend the output of `--help` to name the unit "lines" and the default:
-  --min-conf-desc-length=n   set the min description length, if shorter, warn
+  --min-conf-desc-length=n   set the minimum description length for config symbols
+                             in lines, if shorter, warn (default 4)

Include the minimum number of lines as other error messages already do:
- WARNING: please write a help paragraph that fully describes the config symbol
+ WARNING: please write a help paragraph that fully describes the config symbol with at least 4 lines

Link: https://lkml.kernel.org/r/c71c170c90eba26265951e248adfedd3245fe575.1741605695.git.p.hahn@avm.de
Signed-off-by: Philipp Hahn <p.hahn@avm.de>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 8c27c39d918202e0c61d96e9634211c0417cbcc8..5cd8935bdd98e3be7f1e4659cd092d45909696b5 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -115,7 +115,8 @@ Options:
   --max-line-length=n        set the maximum line length, (default $max_line_length)
                              if exceeded, warn on patches
                              requires --strict for use with --file
-  --min-conf-desc-length=n   set the min description length, if shorter, warn
+  --min-conf-desc-length=n   set the minimum description length for config symbols
+                             in lines, if shorter, warn (default $min_conf_desc_length)
   --tab-size=n               set the number of spaces for tab (default $tabsize)
   --root=PATH                PATH to the kernel tree root
   --no-summary               suppress the per-file summary
@@ -3647,7 +3648,7 @@ sub process {
                            $help_length < $min_conf_desc_length) {
                                my $stat_real = get_stat_real($linenr, $ln - 1);
                                WARN("CONFIG_DESCRIPTION",
-                                    "please write a help paragraph that fully describes the config symbol\n" . "$here\n$stat_real\n");
+                                    "please write a help paragraph that fully describes the config symbol with at least $min_conf_desc_length lines\n" . "$here\n$stat_real\n");
                        }
                }