checkpatch: extend line continuation test

Preprocessor directives and asm statements should be allowed to have a
line continuation.

Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 6fa1677..3e9fee6 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3009,10 +3009,12 @@ sub process {
                                }
                        }
 
-# check for line continuations outside of #defines
+# check for line continuations outside of #defines, preprocessor #, and asm
 
                } else {
                        if ($prevline !~ /^..*\\$/ &&
+                           $line !~ /^\+\s*\#.*\\$/ &&         # preprocessor
+                           $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ &&   # asm
                            $line =~ /^\+.*\\$/) {
                                WARN("LINE_CONTINUATIONS",
                                     "Avoid unnecessary line continuations\n" . $herecurr);