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author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-10-28 22:42:17 +0100 |
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committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-11-13 18:14:55 +0100 |
commit | d19ad0775dcd64b49eecf4fa79c17959ebfbd26b (patch) | |
tree | 959910248943a15ed131940bc48eef8835237c34 /fs/pstore | |
parent | MAINTAINERS: assign ./fs/tracefs to TRACING (diff) | |
download | linux-d19ad0775dcd64b49eecf4fa79c17959ebfbd26b.tar.xz linux-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 'fs/pstore')
-rw-r--r-- | fs/pstore/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c index adb0935eb062..5939595f0115 100644 --- a/fs/pstore/ftrace.c +++ b/fs/pstore/ftrace.c @@ -26,7 +26,7 @@ static u64 pstore_ftrace_stamp; static void notrace pstore_ftrace_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, - struct pt_regs *regs) + struct ftrace_regs *fregs) { int bit; unsigned long flags; |