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module: use RCU to synchronize find_module
[linux-2.6-microblaze.git]
/
kernel
/
trace
/
trace_kprobe.c
diff --git
a/kernel/trace/trace_kprobe.c
b/kernel/trace/trace_kprobe.c
index
9c31f42
..
3137992
100644
(file)
--- a/
kernel/trace/trace_kprobe.c
+++ b/
kernel/trace/trace_kprobe.c
@@
-124,9
+124,9
@@
static nokprobe_inline bool trace_kprobe_module_exist(struct trace_kprobe *tk)
if (!p)
return true;
*p = '\0';
if (!p)
return true;
*p = '\0';
-
mutex_lock(&module_mutex
);
+
rcu_read_lock_sched(
);
ret = !!find_module(tk->symbol);
ret = !!find_module(tk->symbol);
-
mutex_unlock(&module_mutex
);
+
rcu_read_unlock_sched(
);
*p = ':';
return ret;
*p = ':';
return ret;
@@
-434,7
+434,7
@@
static int disable_trace_kprobe(struct trace_event_call *call,
return 0;
}
return 0;
}
-#if defined(CONFIG_
KPROBES_ON
_FTRACE) && \
+#if defined(CONFIG_
DYNAMIC
_FTRACE) && \
!defined(CONFIG_KPROBE_EVENTS_ON_NOTRACE)
static bool __within_notrace_func(unsigned long addr)
{
!defined(CONFIG_KPROBE_EVENTS_ON_NOTRACE)
static bool __within_notrace_func(unsigned long addr)
{