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| author | Dmitry Shmidt <dimitrysh@google.com> | 2017-01-17 12:44:14 -0800 |
|---|---|---|
| committer | Dmitry Shmidt <dimitrysh@google.com> | 2017-01-17 12:44:14 -0800 |
| commit | f103e3b0d8e462a747c53fc5a7ac3981ef1e8f3f (patch) | |
| tree | 2fcb1d356e096ae0b0c047abebfaa0424223595e /kernel/trace/trace_functions_graph.c | |
| parent | 82a6fedb6ea53c9f3eb00ab1e0b839d3fcfe5fc2 (diff) | |
| parent | d9ea51a9bea4ed29f8fd9c59a8122c7aabcc5562 (diff) | |
Merge tag 'v4.4.43' into android-4.4.y
This is the 4.4.43 stable release
Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 4641bdb40f8f..96c75b0e9831 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -785,6 +785,10 @@ print_graph_entry_leaf(struct trace_iterator *iter, cpu_data = per_cpu_ptr(data->cpu_data, cpu); + /* If a graph tracer ignored set_graph_notrace */ + if (call->depth < -1) + call->depth += FTRACE_NOTRACE_DEPTH; + /* * Comments display at + 1 to depth. Since * this is a leaf function, keep the comments @@ -793,7 +797,8 @@ print_graph_entry_leaf(struct trace_iterator *iter, cpu_data->depth = call->depth - 1; /* No need to keep this function around for this depth */ - if (call->depth < FTRACE_RETFUNC_DEPTH) + if (call->depth < FTRACE_RETFUNC_DEPTH && + !WARN_ON_ONCE(call->depth < 0)) cpu_data->enter_funcs[call->depth] = 0; } @@ -823,11 +828,16 @@ print_graph_entry_nested(struct trace_iterator *iter, struct fgraph_cpu_data *cpu_data; int cpu = iter->cpu; + /* If a graph tracer ignored set_graph_notrace */ + if (call->depth < -1) + call->depth += FTRACE_NOTRACE_DEPTH; + cpu_data = per_cpu_ptr(data->cpu_data, cpu); cpu_data->depth = call->depth; /* Save this function pointer to see if the exit matches */ - if (call->depth < FTRACE_RETFUNC_DEPTH) + if (call->depth < FTRACE_RETFUNC_DEPTH && + !WARN_ON_ONCE(call->depth < 0)) cpu_data->enter_funcs[call->depth] = call->func; } @@ -1057,7 +1067,8 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, */ cpu_data->depth = trace->depth - 1; - if (trace->depth < FTRACE_RETFUNC_DEPTH) { + if (trace->depth < FTRACE_RETFUNC_DEPTH && + !WARN_ON_ONCE(trace->depth < 0)) { if (cpu_data->enter_funcs[trace->depth] != trace->func) func_match = 0; cpu_data->enter_funcs[trace->depth] = 0; |