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authorLi Zefan <lizf@cn.fujitsu.com>2010-03-24 05:57:43 +0300
committerSteven Rostedt <rostedt@goodmis.org>2010-04-01 06:56:58 +0400
commitae832d1e03ac9bf09fb8a07fb37908ab40c7cd0e (patch)
treecf754c5242e66aa0349559af880db5fa29af6f2a /include/linux/module.h
parent50354a8a28d0c91695a2d6d25b5a821bfe557a07 (diff)
downloadlinux-ae832d1e03ac9bf09fb8a07fb37908ab40c7cd0e.tar.xz
tracing: Remove side effect from module tracepoints that caused a GPF
Remove the @refcnt argument, because it has side-effects, and arguments with side-effects are not skipped by the jump over disabled instrumentation and are executed even when the tracepoint is disabled. This was also causing a GPF as found by Randy Dunlap: Subject: 2.6.33 GP fault only when built with tracing LKML-Reference: <4BA2B69D.3000309@oracle.com> Note, the current 2.6.34-rc has a fix for the actual cause of the GPF, but this fixes one of its triggers. Tested-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4BA97FA7.6040406@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/module.h')
-rw-r--r--include/linux/module.h6
1 files changed, 2 insertions, 4 deletions
diff --git a/include/linux/module.h b/include/linux/module.h
index 5e869ffd34aa..393ec39b580a 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -460,8 +460,7 @@ static inline void __module_get(struct module *module)
if (module) {
preempt_disable();
__this_cpu_inc(module->refptr->count);
- trace_module_get(module, _THIS_IP_,
- __this_cpu_read(module->refptr->count));
+ trace_module_get(module, _THIS_IP_);
preempt_enable();
}
}
@@ -475,8 +474,7 @@ static inline int try_module_get(struct module *module)
if (likely(module_is_live(module))) {
__this_cpu_inc(module->refptr->count);
- trace_module_get(module, _THIS_IP_,
- __this_cpu_read(module->refptr->count));
+ trace_module_get(module, _THIS_IP_);
}
else
ret = 0;