Messages in this thread Patch in this message | | | From | Jeff Xie <> | Subject | [PATCH 1/3] tracing: make tracepoint_iter_lock public | Date | Wed, 30 Mar 2022 00:39:29 +0800 |
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The syscall tracepoints need tracepoint_iter_lock for the tp_printk work.
Signed-off-by: Jeff Xie <xiehuan09@gmail.com> --- kernel/trace/trace.c | 2 +- kernel/trace/trace.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index eaf7d30ca6f1..867f00473f9f 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2833,7 +2833,7 @@ trace_event_buffer_lock_reserve(struct trace_buffer **current_rb, } EXPORT_SYMBOL_GPL(trace_event_buffer_lock_reserve); -static DEFINE_SPINLOCK(tracepoint_iter_lock); +DEFINE_SPINLOCK(tracepoint_iter_lock); static DEFINE_MUTEX(tracepoint_printk_mutex); static void output_printk(struct trace_event_buffer *fbuffer) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 0f5e22238cd2..7ce345699ac2 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1523,6 +1523,7 @@ static inline void *event_file_data(struct file *filp) extern struct mutex event_mutex; extern struct list_head ftrace_events; +extern spinlock_t tracepoint_iter_lock; extern const struct file_operations event_trigger_fops; extern const struct file_operations event_hist_fops; -- 2.25.1
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