checkpatch: rename variables to avoid confusion

The variable name "$msg_type" is sometimes used to set the message type,
and sometimes used to set the message level.  This works but is kind of
confusing.  Use "$msg_level" in the latter case instead, to make the code
clearer.

Link: http://lkml.kernel.org/r/20170902175345.175db33a@endymion
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-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 3e66fbf..b3a1bc7 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2715,10 +2715,10 @@
 				my $typo_fix = $spelling_fix{lc($typo)};
 				$typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
 				$typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
-				my $msg_type = \&WARN;
-				$msg_type = \&CHK if ($file);
-				if (&{$msg_type}("TYPO_SPELLING",
-						 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
+				my $msg_level = \&WARN;
+				$msg_level = \&CHK if ($file);
+				if (&{$msg_level}("TYPO_SPELLING",
+						  "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
 				    $fix) {
 					$fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
 				}
@@ -2753,10 +2753,10 @@
 		    $rawline =~ /\b59\s+Temple\s+Pl/i ||
 		    $rawline =~ /\b51\s+Franklin\s+St/i) {
 			my $herevet = "$here\n" . cat_vet($rawline) . "\n";
-			my $msg_type = \&ERROR;
-			$msg_type = \&CHK if ($file);
-			&{$msg_type}("FSF_MAILING_ADDRESS",
-				     "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet)
+			my $msg_level = \&ERROR;
+			$msg_level = \&CHK if ($file);
+			&{$msg_level}("FSF_MAILING_ADDRESS",
+				      "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet)
 		}
 
 # check for Kconfig help text having a real description
@@ -3810,10 +3810,10 @@
 
 # avoid BUG() or BUG_ON()
 		if ($line =~ /\b(?:BUG|BUG_ON)\b/) {
-			my $msg_type = \&WARN;
-			$msg_type = \&CHK if ($file);
-			&{$msg_type}("AVOID_BUG",
-				     "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
+			my $msg_level = \&WARN;
+			$msg_level = \&CHK if ($file);
+			&{$msg_level}("AVOID_BUG",
+				      "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
 		}
 
 # avoid LINUX_VERSION_CODE
@@ -4339,11 +4339,11 @@
 
 					# messages are ERROR, but ?: are CHK
 					if ($ok == 0) {
-						my $msg_type = \&ERROR;
-						$msg_type = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
+						my $msg_level = \&ERROR;
+						$msg_level = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
 
-						if (&{$msg_type}("SPACING",
-								 "spaces required around that '$op' $at\n" . $hereptr)) {
+						if (&{$msg_level}("SPACING",
+								  "spaces required around that '$op' $at\n" . $hereptr)) {
 							$good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
 							if (defined $fix_elements[$n + 2]) {
 								$fix_elements[$n + 2] =~ s/^\s+//;