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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2020-10-28 17:42:17 -0400
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2020-11-13 12:14:55 -0500
commitd19ad0775dcd64b49eecf4fa79c17959ebfbd26b (patch)
tree959910248943a15ed131940bc48eef8835237c34 /arch/nds32
parent58954b3be8b7a8a0ebf1ced6fbbab808e8ccc4b6 (diff)
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 'arch/nds32')
-rw-r--r--arch/nds32/kernel/ftrace.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
index 3763b3f8c3db..414f8a780cc3 100644
--- a/arch/nds32/kernel/ftrace.c
+++ b/arch/nds32/kernel/ftrace.c
@@ -10,7 +10,7 @@ extern void (*ftrace_trace_function)(unsigned long, unsigned long,
extern void ftrace_graph_caller(void);
noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip,
- struct ftrace_ops *op, struct pt_regs *regs)
+ struct ftrace_ops *op, struct ftrace_regs *fregs)
{
__asm__ (""); /* avoid to optimize as pure function */
}
@@ -38,7 +38,7 @@ EXPORT_SYMBOL(_mcount);
#else /* CONFIG_DYNAMIC_FTRACE */
noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip,
- struct ftrace_ops *op, struct pt_regs *regs)
+ struct ftrace_ops *op, struct ftrace_regs *fregs)
{
__asm__ (""); /* avoid to optimize as pure function */
}