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SubjectRe: 2.6.28-rc6-git1 -- BUG: unable to handle kernel paging request at ffff8800be8b0019
On Thu, 27 Nov 2008 18:31:34 -0500 (EST) Steven Rostedt <rostedt@goodmis.org> wrote:

>
> [ Added Frederic ]
>
> On Thu, 27 Nov 2008, Hugh Dickins wrote:
> > break;
> > --- 2.6.28-rc6/include/linux/ftrace.h 2008-11-02 23:17:56.000000000 +0000
> > +++ linux/include/linux/ftrace.h 2008-11-27 16:39:26.000000000 +0000
> > @@ -231,7 +231,7 @@ ftrace_init_module(unsigned long *start,
> >
> > struct boot_trace {
> > pid_t caller;
> > - char func[KSYM_NAME_LEN];
> > + char func[KSYM_SYMBOL_LEN];
> > int result;
> > unsigned long long duration; /* usecs */
> > ktime_t calltime;
>
> Acked-by: Steven Rostedt <srostedt@redhat.com>
>
> The boot tracer was written by Frederic.
>

This makes rather a mess when applied ahead of the (massive) ftrace
changes in linux-next.

afacit these two func[] arrays:

--- /dev/null
+++ b/include/trace/boot.h
@@ -0,0 +1,56 @@
+#ifndef _LINUX_TRACE_BOOT_H
+#define _LINUX_TRACE_BOOT_H
+
+/*
+ * Structure which defines the trace of an initcall
+ * while it is called.
+ * You don't have to fill the func field since it is
+ * only used internally by the tracer.
+ */
+struct boot_trace_call {
+ pid_t caller;
+ char func[KSYM_NAME_LEN];
+};
+
+/*
+ * Structure which defines the trace of an initcall
+ * while it returns.
+ */
+struct boot_trace_ret {
+ char func[KSYM_NAME_LEN];
+ int result;
+ unsigned long long duration; /* nsecs */
+};

will need to be changed to KSYM_SYMBOL_LEN. I think. Please fix it up
carefully when this all lands on your doorstep.



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