diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2011-08-09 12:50:46 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2012-07-19 13:18:49 -0400 |
| commit | a1e2e31d175a1349274eba3465d17616c6725f8c (patch) | |
| tree | 5f92ba7a822f8a9911aa50157f796213bfac4ebb /kernel/trace/trace_stack.c | |
| parent | ccf3672d530170c98c734dfc5db07d64bcbad2ad (diff) | |
| download | lwn-a1e2e31d175a1349274eba3465d17616c6725f8c.tar.gz lwn-a1e2e31d175a1349274eba3465d17616c6725f8c.zip | |
ftrace: Return pt_regs to function trace callback
Return as the 4th paramater to the function tracer callback the pt_regs.
Later patches that implement regs passing for the architectures will require
having the ftrace_ops set the SAVE_REGS flag, which will tell the arch
to take the time to pass a full set of pt_regs to the ftrace_ops callback
function. If the arch does not support it then it should pass NULL.
If an arch can pass full regs, then it should define:
ARCH_SUPPORTS_FTRACE_SAVE_REGS to 1
Link: http://lkml.kernel.org/r/20120702201821.019966811@goodmis.org
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_stack.c')
| -rw-r--r-- | kernel/trace/trace_stack.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index e20006d5fb6a..2fa5328e8893 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -111,7 +111,8 @@ static inline void check_stack(void) } static void -stack_trace_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op) +stack_trace_call(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct pt_regs *pt_regs) { int cpu; |