[ For RCU trace which is not yet in mainline ]

In the initialization of the RCU trace module, if
rcupreempt_debugfs_init() fails, we never free the the trace buffer.

This patch frees the trace buffer in case the debugfs fails.

Signed-off-by: Steven Rostedt

Index: linux-2.6.23-rc9-rt1/kernel/rcupreempt_trace.c
================================================== =================
--- linux-2.6.23-rc9-rt1.orig/kernel/rcupreempt_trace.c
+++ linux-2.6.23-rc9-rt1/kernel/rcupreempt_trace.c
@@ -309,11 +309,16 @@ out:

static int __init rcupreempt_trace_init(void)
+ int ret;
rcupreempt_trace_buf = kmalloc(RCUPREEMPT_TRACE_BUF_SIZE, GFP_KERNEL);
if (!rcupreempt_trace_buf)
return 1;
- return rcupreempt_debugfs_init();
+ ret = rcupreempt_debugfs_init();
+ if (ret)
+ kfree(rcupreempt_trace_buf);
+ return ret;

static void __exit rcupreempt_trace_cleanup(void)

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