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parisc/ftrace: set function trace function 

With DYNAMIC_FTRACE, we need to implement ftrace_update_trace_func
and not call ftrace_trace_function() directly, as ftrace doesn't
expect calls to this function during code patching.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Sven Schnelle 2021-10-23 20:21:00 +02:00 committed by Helge Deller
parent d1fbab7e20
commit 44382af893
1 changed files with 5 additions and 7 deletions
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12
arch/parisc/kernel/ftrace.c
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@ -48,20 +48,16 @@ static void __hot prepare_ftrace_return(unsigned long *parent,
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
static ftrace_func_t ftrace_func;
void notrace __hot ftrace_function_trampoline(unsigned long parent,
unsigned long self_addr,
unsigned long org_sp_gr3,
struct ftrace_regs *fregs)
{
#ifndef CONFIG_DYNAMIC_FTRACE
extern ftrace_func_t ftrace_trace_function;
#endif
extern struct ftrace_ops *function_trace_op;
if (function_trace_op->flags & FTRACE_OPS_FL_ENABLED &&
ftrace_trace_function != ftrace_stub)
ftrace_trace_function(self_addr, parent,
function_trace_op, fregs);
ftrace_func(self_addr, parent, function_trace_op, fregs);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
if (dereference_function_descriptor(ftrace_graph_return) !=
@ -99,8 +95,10 @@ int __init ftrace_dyn_arch_init(void)
{
return 0;
}
int ftrace_update_ftrace_func(ftrace_func_t func)
{
ftrace_func = func;
return 0;
}