checkpatch: add test for blank lines after function/struct/union/enum

Add a --strict test asking for a blank line after
function/struct/union/enum declarations.

Allow exceptions for several attributes and macro uses.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c40ba40cef43..9e4ba9fa9bc8 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2292,6 +2292,22 @@ sub process {
                              "networking block comments put the trailing */ on a separate line\n" . $herecurr);
                 }
 
+# check for missing blank lines after struct/union declarations
+# with exceptions for various attributes and macros
+                if ($prevline =~ /^[\+ ]};?\s*$/ &&
+                    $line =~ /^\+/ &&
+                    !($line =~ /^\+\s*$/ ||
+                      $line =~ /^\+\s*EXPORT_SYMBOL/ ||
+                      $line =~ /^\+\s*MODULE_/i ||
+                      $line =~ /^\+\s*\#\s*(?:end|elif|else)/ ||
+                      $line =~ /^\+[a-z_]*init/ ||
+                      $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ ||
+                      $line =~ /^\+\s*DECLARE/ ||
+                      $line =~ /^\+\s*__setup/)) {
+                        CHK("LINE_SPACING",
+                            "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev);
+                }
+
 # check for missing blank lines after declarations
                 if ($sline =~ /^\+\s+\S/ &&                     #Not at char 1
                         # actual declarations