xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ftrace: Return pt_regs to function trace callback

Browse Source 
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>
This commit is contained in:
Steven Rostedt
2011-08-09 12:50:46 -04:00
committed by Steven Rostedt
parent ccf3672d53
commit a1e2e31d17
9 changed files with 47 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
kernel/trace/trace_stack.c
View File

@@ -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;