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author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-10-28 17:42:17 -0400 |
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committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-11-13 12:14:55 -0500 |
commit | d19ad0775dcd64b49eecf4fa79c17959ebfbd26b (patch) | |
tree | 959910248943a15ed131940bc48eef8835237c34 /kernel/trace/trace_event_perf.c | |
parent | 58954b3be8b7a8a0ebf1ced6fbbab808e8ccc4b6 (diff) | |
download | linux-stable-d19ad0775dcd64b49eecf4fa79c17959ebfbd26b.tar.gz linux-stable-d19ad0775dcd64b49eecf4fa79c17959ebfbd26b.tar.bz2 linux-stable-d19ad0775dcd64b49eecf4fa79c17959ebfbd26b.zip |
ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs
In preparation to have arguments of a function passed to callbacks attached
to functions as default, change the default callback prototype to receive a
struct ftrace_regs as the forth parameter instead of a pt_regs.
For callbacks that set the FL_SAVE_REGS flag in their ftrace_ops flags, they
will now need to get the pt_regs via a ftrace_get_regs() helper call. If
this is called by a callback that their ftrace_ops did not have a
FL_SAVE_REGS flag set, it that helper function will return NULL.
This will allow the ftrace_regs to hold enough just to get the parameters
and stack pointer, but without the worry that callbacks may have a pt_regs
that is not completely filled.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_event_perf.c')
-rw-r--r-- | kernel/trace/trace_event_perf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index 1b202e28dfaa..a71181655958 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -432,7 +432,7 @@ NOKPROBE_SYMBOL(perf_trace_buf_update); #ifdef CONFIG_FUNCTION_TRACER static void perf_ftrace_function_call(unsigned long ip, unsigned long parent_ip, - struct ftrace_ops *ops, struct pt_regs *pt_regs) + struct ftrace_ops *ops, struct ftrace_regs *fregs) { struct ftrace_entry *entry; struct perf_event *event; |