---

yaml --- r: 121117 b: refs/heads/master c: c91add5 h: refs/heads/master i: 121115: 8b84ee2 v: v3
git-mirror · Nov 16, 2008 · be991d5 · be991d5
1 parent 50eb734
commit be991d5
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Showing 3 changed files with 14 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b3535c6390f27d04273e4eee0bc687f171fbf5f4
+refs/heads/master: c91add5fa68ea9b1f2923b3788c5dae0e60e1f6b
diff --git a/trunk/kernel/trace/ring_buffer.c b/trunk/kernel/trace/ring_buffer.c
@@ -533,6 +533,12 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
 	LIST_HEAD(pages);
 	int i, cpu;
 
+	/*
+	 * Always succeed at resizing a non-existent buffer:
+	 */
+	if (!buffer)
+		return size;
+
 	size = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
 	size *= BUF_PAGE_SIZE;
 	buffer_size = buffer->pages * BUF_PAGE_SIZE;

diff --git a/trunk/scripts/bootgraph.pl b/trunk/scripts/bootgraph.pl
@@ -78,11 +78,13 @@
 }
 
 if ($count == 0) {
-	print "No data found in the dmesg. Make sure that 'printk.time=1' and\n";
-	print "'initcall_debug' are passed on the kernel command line.\n\n";
-	print "Usage: \n";
-	print "      dmesg | perl scripts/bootgraph.pl > output.svg\n\n";
-	exit;
+    print STDERR <<END;
+No data found in the dmesg. Make sure that 'printk.time=1' and
+'initcall_debug' are passed on the kernel command line.
+Usage:
+      dmesg | perl scripts/bootgraph.pl > output.svg
+END
+    exit 1;
 }
 
 print "<?xml version=\"1.0\" standalone=\"no\"?> \n";