[PATCH v2 1/5] checkpatch: improve Kconfig help text patch parsing

[Robert Elliott]

While parsing Kconfig help text, allow the strings that affect
parsing (e.g., help, bool, tristate, and prompt) to be in existing
text, not just added text (i.e., allow both + and a space character
at the beginning of the line).

This improves parsing of a patch like:

+config CRYPTO_SHA512_S390
+       tristate "SHA384 and SHA512 (s390)"
+       depends on S390
        select CRYPTO_HASH
        help
-         SHA512 secure hash standard (DFIPS 180-2).
+         SHA-384 and SHA-512 secure hash algorithms (FIPS 180)

-         This version of SHA implements a 512 bit hash with 256 bits of
-         security against collision attacks.
+         Architecture: s390

-         This code also includes SHA-384, a 384 bit hash with 192 bits
-         of security against collision attacks.
+         It is available as of z10.

Signed-off-by: Robert Elliott <elliott@xxxxxxx>
---
 scripts/checkpatch.pl | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c8a616a9d034..1d9e563e768a 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3490,11 +3490,11 @@ sub process {
 				next if ($f =~ /^-/);
 				last if ($f !~ /^[\+ ]/);	# !patch context
 
-				if ($f =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) {
+				if ($f =~ /^[\+ ]\s*(?:bool|tristate|prompt)\s*["']/) {
 					$needs_help = 1;
 					next;
 				}
-				if ($f =~ /^\+\s*help\s*$/) {
+				if ($f =~ /^[\+ ]\s*help\s*$/) {
 					$has_help = 1;
 					next;
 				}
@@ -3519,7 +3519,8 @@ 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 $min_conf_desc_length lines of help text that fully describes the config symbol (detected $help_length lines)\n" .
+				     "$here\n$stat_real\n");
 			}
 		}
 
-- 
2.38.1