checkpatch: fix jiffies comparison and others

checkpatch could not distinguish between a variable in a struct named
jiffies and the normal jiffies.

	foo->jiffies

would emit a "Comparing jiffies" arning.

Update the $Compare variable to do a negative look-behind for "-" when
finding a ">" so that a pointer dereference like -> isn't a comparison.

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>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e7c5097..646295c 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -296,7 +296,7 @@ our $Float_int      = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
 our $Float     = qr{$Float_hex|$Float_dec|$Float_int};
 our $Constant  = qr{$Float|$Binary|$Octal|$Hex|$Int};
 our $Assignment        = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=};
-our $Compare    = qr{<=|>=|==|!=|<|>};
+our $Compare    = qr{<=|>=|==|!=|<|(?<!-)>};
 our $Arithmetic = qr{\+|-|\*|\/|%};
 our $Operators = qr{
                        <=|>=|==|!=|