checkpatch: high precedence operators do not require additional parentheses in #defines
Andy Whitcroft [Fri, 23 Mar 2012 22:02:18 +0000 (15:02 -0700)]
With any very high precedence operator it is not necessary to enforce
additional parentheses around simple negated expressions.  This prevents
us requesting further perentheses around the following:

    #define PMEM_IS_FREE(id, index) !(pmem[id].bitmap[index].allocated)

For now add logical and bitwise not and unary minus.

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

scripts/checkpatch.pl

index 01a6598..ec58d31 100755 (executable)
@@ -2916,7 +2916,7 @@ sub process {
                        if ($dstat ne '' &&
                            $dstat !~ /^(?:$Ident|-?$Constant),$/ &&                    # 10, // foo(),
                            $dstat !~ /^(?:$Ident|-?$Constant);$/ &&                    # foo();
-                           $dstat !~ /^(?:$Ident|-?$Constant)$/ &&                     # 10 // foo()
+                           $dstat !~ /^[!~-]?(?:$Ident|$Constant)$/ &&         # 10 // foo() // !foo // ~foo // -foo
                            $dstat !~ /^'X'$/ &&                                        # character constants
                            $dstat !~ /$exceptions/ &&
                            $dstat !~ /^\.$Ident\s*=/ &&                                # .foo =