Change in coreboot[master]: util/lint/checkpatch: Update "check for missing blank lines after dec...

[HAOUAS Elyes (Code Review)]

HAOUAS Elyes has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/61469 )

Change subject: util/lint/checkpatch: Update "check for missing blank lines after declarations"
......................................................................

util/lint/checkpatch: Update "check for missing blank lines after declarations"

This is to reduce difference with linux v5.16.

Change-Id: I1b7bc2b4ec832f0abeda215c381856a5ec153883
Signed-off-by: Elyes HAOUAS 
---
M util/lint/checkpatch.pl
1 file changed, 28 insertions(+), 23 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/69/61469/1

diff --git a/util/lint/checkpatch.pl b/util/lint/checkpatch.pl
index 9bd490d..fdf6818 100755
--- a/util/lint/checkpatch.pl
+++ b/util/lint/checkpatch.pl
@@ -3259,43 +3259,48 @@
    	}

# check for missing blank lines after declarations
-		if ($sline =~ /^+\s+\S/ &&			#Not at char 1
-			# actual declarations
-		    ($prevline =~ /^+\s+$Declare\s*$Ident\s*[=,;:[]/ ||
+# (declarations must have the same indentation and not be at the start of line)
+		if (($prevline =~ /+(\s+)\S/) && $sline =~ /^+$1\S/) {
+			# use temporaries
+			my $sl = $sline;
+			my $pl = $prevline;
+			# remove $Attribute/$Sparse uses to simplify comparisons
+			$sl =~ s/\b(?:$Attribute|$Sparse)\b//g;
+			$pl =~ s/\b(?:$Attribute|$Sparse)\b//g;
+			if (($pl =~ /^+\s+$Declare\s*$Ident\s*[=,;:[]/ ||
    		# function pointer declarations
-		     $prevline =~ /^+\s+$Declare\s*(\s**\s*$Ident\s*)\s*[=,;:[(]/ ||
+			     $pl =~ /^+\s+$Declare\s*(\s**\s*$Ident\s*)\s*[=,;:[(]/ ||
    		# foo bar; where foo is some local typedef or #define
-		     $prevline =~ /^+\s+$Ident(?:\s+|\s**\s*)$Ident\s*[=,;[]/ ||
+			     $pl =~ /^+\s+$Ident(?:\s+|\s**\s*)$Ident\s*[=,;[]/ ||
    		# known declaration macros
-		     $prevline =~ /^+\s+$declaration_macros/) &&
+			     $pl =~ /^+\s+$declaration_macros/) &&
    		# for "else if" which can look like "$Ident $Ident"
-		    !($prevline =~ /^+\s+$c90_Keywords\b/ ||
+			    !($pl =~ /^+\s+$c90_Keywords\b/ ||
    		# other possible extensions of declaration lines
-		      $prevline =~ /(?:$Compare|$Assignment|$Operators)\s*$/ ||
+			      $pl =~ /(?:$Compare|$Assignment|$Operators)\s*$/ ||
    		# not starting a section or a macro "" extended line
-		      $prevline =~ /(?:{\s*|\)$/) &&
+			      $pl =~ /(?:{\s*|\)$/) &&
    		# looks like a declaration
-		    !($sline =~ /^+\s+$Declare\s*$Ident\s*[=,;:[]/ ||
+			    !($sl =~ /^+\s+$Declare\s*$Ident\s*[=,;:[]/ ||
    		# function pointer declarations
-		      $sline =~ /^+\s+$Declare\s*(\s**\s*$Ident\s*)\s*[=,;:[(]/ ||
+			      $sl =~ /^+\s+$Declare\s*(\s**\s*$Ident\s*)\s*[=,;:[(]/ ||
    		# foo bar; where foo is some local typedef or #define
-		      $sline =~ /^+\s+$Ident(?:\s+|\s**\s*)$Ident\s*[=,;[]/ ||
+			      $sl =~ /^+\s+$Ident(?:\s+|\s**\s*)$Ident\s*[=,;[]/ ||
    		# known declaration macros
-		      $sline =~ /^+\s+$declaration_macros/ ||
+			      $sl =~ /^+\s+$declaration_macros/ ||
    		# start of struct or union or enum
-		      $sline =~ /^+\s+(?:union|struct|enum|typedef)\b/ ||
+			      $sl =~ /^+\s+(?:static\s+)?(?:const\s+)?(?:union|struct|enum|typedef)\b/ ||
    		# start or end of block or continuation of declaration
-		      $sline =~ /^+\s+(?:$|[{}.#"?:([])/ ||
+			      $sl =~ /^+\s+(?:$|[{}.#"?:([])/ ||
    		# bitfield continuation
-		      $sline =~ /^+\s+$Ident\s*:\s*\d+\s*[,;]/ ||
+			      $sl =~ /^+\s+$Ident\s*:\s*\d+\s*[,;]/ ||
    		# other possible extensions of declaration lines
-		      $sline =~ /^+\s+(?\s*(?:$Compare|$Assignment|$Operators)/) &&
-			# indentation of previous and current line are the same
-		    (($prevline =~ /+(\s+)\S/) && $sline =~ /^+$1\S/)) {
-			if (WARN("LINE_SPACING",
-				 "Missing a blank line after declarations\n" . $hereprev) &&
-			    $fix) {
-				fix_insert_line($fixlinenr, "+");
+			      $sl =~ /^+\s+(?\s*(?:$Compare|$Assignment|$Operators)/)) {
+				if (WARN("LINE_SPACING",
+					 "Missing a blank line after declarations\n" . $hereprev) &&
+				    $fix) {
+					fix_insert_line($fixlinenr, "+");
+				}
    		}
    	}