checkpatch: Add --strict messages for blank lines around braces

Blank lines around braces are not unnecessary.  Emit a message on the use
of these blank lines only when using --strict.

int foo(int bar)
{

	something or other....

}

is generally written in the kernel as:

int foo(int bar)
{
	something or other...
}

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

1 files changed, 10 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3e9fee60642c..e0a674f471ee 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3189,6 +3189,16 @@ sub process {
                         }
                 }
 
+# check for unnecessary blank lines around braces
+                if (($line =~ /^..*}\s*$/ && $prevline =~ /^.\s*$/)) {
+                        CHK("BRACES",
+                            "Blank lines aren't necessary before a close brace '}'\n" . $hereprev);
+                }
+                if (($line =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
+                        CHK("BRACES",
+                            "Blank lines aren't necessary after an open brace '{'\n" . $hereprev);
+                }
+
 # no volatiles please
                 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
                 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {