checkpatch: update checkpatch to warn about C99 type usage

Only in rare cases should we allow C99 types, so lets warn about it to
catch issues.

Change-Id: I2bacdd4ba98f88482e0b7acc0567ff1139e749bf
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

.checkpatch.conf

@@ -11,7 +11,6 @@
 --ignore SPLIT_STRING
 --ignore VOLATILE
 --ignore CONFIG_EXPERIMENTAL
---ignore PREFER_KERNEL_TYPES
 --ignore AVOID_EXTERNS
 --ignore NETWORKING_BLOCK_COMMENT_STYLE
 --ignore DATE_TIME

scripts/checkpatch.pl

@@ -415,7 +415,7 @@ our $typeOtherOSTypedefs = qr{(?x:
 	u(?:nchar|short|int|long)            # sysv
 )};
 our $typeKernelTypedefs = qr{(?x:
-	(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
+	(?:__)?(?:u|s|be|le)(?:8|16|32|64)_t|
 	atomic_t
 )};
 our $typeTypedefs = qr{(?x:
@@ -5547,21 +5547,17 @@ sub process {
 			      "Using weak declarations can have unintended link defects\n" . $herecurr);
 		}
 
-# check for c99 types like uint8_t used outside of uapi/
+# check for c99 types like uint8_t
-		if ($realfile !~ m@\binclude/uapi/@ &&
+		if ($line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
-		    $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
 			my $type = $1;
 			if ($type =~ /\b($typeC99Typedefs)\b/) {
 				$type = $1;
 				my $kernel_type = 'u';
 				$kernel_type = 's' if ($type =~ /^_*[si]/);
 				$type =~ /(\d+)/;
-				$kernel_type .= $1;
+				$kernel_type .= $1.'_t';
-				if (CHK("PREFER_KERNEL_TYPES",
+				WARN("PREFER_KERNEL_TYPES",
-					"Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr) &&
+					"Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr)
-				    $fix) {
-					$fixed[$fixlinenr] =~ s/\b$type\b/$kernel_type/;
-				}
 			}
 		}