kernel-doc: fix param matching for array params

Fix function actual parameter vs. kernel-doc description matching
so that a warning is not printed when it should not be:

Warning(include/linux/etherdevice.h:199): Excess function parameter 'addr' description in 'is_etherdev_addr'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index fde6e3a22e7..ed591e9b7d1 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1653,6 +1653,15 @@ sub push_parameter($$$) {
 	}
 	}
 
+	# strip spaces from $param so that it is one continous string
+	# on @parameterlist;
+	# this fixes a problem where check_sections() cannot find
+	# a parameter like "addr[6 + 2]" because it actually appears
+	# as "addr[6", "+", "2]" on the parameter list;
+	# but it's better to maintain the param string unchanged for output,
+	# so just weaken the string compare in check_sections() to ignore
+	# "[blah" in a parameter string;
+	###$param =~ s/\s*//g;
 	push @parameterlist, $param;
 	$parametertypes{$param} = $type;
 }
@@ -1671,6 +1680,14 @@ sub check_sections($$$$$$) {
 			$prm_clean = $prms[$px];
 			$prm_clean =~ s/\[.*\]//;
 			$prm_clean =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//;
+			# ignore array size in a parameter string;
+			# however, the original param string may contain
+			# spaces, e.g.:  addr[6 + 2]
+			# and this appears in @prms as "addr[6" since the
+			# parameter list is split at spaces;
+			# hence just ignore "[..." for the sections check;
+			$prm_clean =~ s/\[.*//;
+
 			##$prm_clean =~ s/^\**//;
 			if ($prm_clean eq $sects[$sx]) {
 				$err = 0;