File 23173-xentrace_Move_register_cpu_notifier_call_... of Package xen

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File 23173-xentrace_Move_register_cpu_notifier_call_into_boot-time_init..patch of Package xen

changeset:   23173:94cef9aaf0cd
user:        Keir Fraser <keir@xen.org>
date:        Wed Apr 06 15:52:50 2011 +0100
files:       xen/common/trace.c
description:
xentrace: Move register_cpu_notifier() call into boot-time init.

We can't do it lazily from alloc_trace_bufs() as that gets called
later if tracing is enabled later by dom0.

Signed-off-by: Keir Fraser <keir@xen.org>

---
 xen/common/trace.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: xen-4.1.2-testing/xen/common/trace.c
===================================================================
--- xen-4.1.2-testing.orig/xen/common/trace.c
+++ xen-4.1.2-testing/xen/common/trace.c
@@ -225,8 +225,6 @@ static int alloc_trace_bufs(unsigned int
     t_buf_highwater = data_size >> 1; /* 50% high water */
     opt_tbuf_size = pages;
 
-    register_cpu_notifier(&cpu_nfb);
-
     printk("xentrace: initialised\n");
     wmb(); /* above must be visible before tb_init_done flag set */
     tb_init_done = 1;
@@ -309,6 +307,8 @@ int trace_will_trace_event(u32 event)
  */
 void __init init_trace_bufs(void)
 {
+    register_cpu_notifier(&cpu_nfb);
+
     if ( opt_tbuf_size && alloc_trace_bufs(opt_tbuf_size) )
     {
         printk(XENLOG_INFO "xentrace: allocation size %d failed, disabling\n",

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File 23173-xentrace_Move_register_cpu_notifier_call_into_boot-time_init..patch of Package xen

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