[PATCH] tracing: recordmcount.pl Clarify the logic on mcount section check

[Li Hong]

Move the mcount section check to the beginning of the objdump read loop.
It is clearer, because mcount section check uses headers dump part of objdump
to identify a mcount section, which goes before the section parts.

Signed-off-by: Li Hong <lihong.hi@xxxxxxxxx>

diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index 970c6d6..a6585b6 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -384,9 +384,26 @@ open(IN, "$objdump -hdr $inputfile|") || die "error running $objdump";
 
 my $text;
 
-my $read_headers = 1;
 
 while (<IN>) {
+    # read headers first
+    my $read_headers = 1;
+    
+    if ($read_headers && /$mcount_section/) {
+	#
+	# Somehow the make process can execute this script on an
+	# object twice. If it does, we would duplicate the mcount
+	# section and it will cause the function tracer self test
+	# to fail. Check if the mcount section exists, and if it does,
+	# warn and exit.
+	#
+	print STDERR "ERROR: $mcount_section already in $inputfile\n" .
+	    "\tThis may be an indication that your build is corrupted.\n" .
+	    "\tDelete $inputfile and try again. If the same object file\n" .
+	    "\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
+	exit(-1);
+    }
+
     # is it a section?
     if (/$section_regex/) {
 	$read_headers = 0;
@@ -427,21 +444,7 @@ while (<IN>) {
 		$offset = hex $1;
 	    }
 	}
-    } elsif ($read_headers && /$mcount_section/) {
-	#
-	# Somehow the make process can execute this script on an
-	# object twice. If it does, we would duplicate the mcount
-	# section and it will cause the function tracer self test
-	# to fail. Check if the mcount section exists, and if it does,
-	# warn and exit.
-	#
-	print STDERR "ERROR: $mcount_section already in $inputfile\n" .
-	    "\tThis may be an indication that your build is corrupted.\n" .
-	    "\tDelete $inputfile and try again. If the same object file\n" .
-	    "\tstill causes an issue, then disable CONFIG_DYNAMIC_FTRACE.\n";
-	exit(-1);
-    }
-
+    } 
     # is this a call site to mcount? If so, record it to print later
     if ($text_found && /$mcount_regex/) {
 	$offsets[$#offsets + 1] = hex $1;
-- 
1.6.0.4

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