From d125bffcefb290743e4eac536886dba689edf1eb Mon Sep 17 00:00:00 2001 From: Julien Thierry Date: Fri, 3 Nov 2017 11:44:16 +0000 Subject: arm64: Fix static use of function graph Function graph does not work currently when CONFIG_DYNAMIC_TRACE is not set. This is because ftrace_function_trace is not always set to ftrace_stub when function_graph is in use. Do not skip checking of graph tracer functions when ftrace_function_trace is set. Signed-off-by: Julien Thierry Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland Acked-by: Steven Rostedt (VMware) Reviewed-by: AKASHI Takahiro Signed-off-by: Will Deacon --- arch/arm64/kernel/entry-ftrace.S | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) (limited to 'arch/arm64/kernel') diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S index e1be42e11ff5..1175f5827ae1 100644 --- a/arch/arm64/kernel/entry-ftrace.S +++ b/arch/arm64/kernel/entry-ftrace.S @@ -108,13 +108,8 @@ ENTRY(_mcount) mcount_get_lr x1 // function's lr (= parent's pc) blr x2 // (*ftrace_trace_function)(pc, lr); -#ifndef CONFIG_FUNCTION_GRAPH_TRACER -skip_ftrace_call: // return; - mcount_exit // } -#else - mcount_exit // return; - // } -skip_ftrace_call: +skip_ftrace_call: // } +#ifdef CONFIG_FUNCTION_GRAPH_TRACER ldr_l x2, ftrace_graph_return cmp x0, x2 // if ((ftrace_graph_return b.ne ftrace_graph_caller // != ftrace_stub) @@ -123,9 +118,8 @@ skip_ftrace_call: adr_l x0, ftrace_graph_entry_stub // != ftrace_graph_entry_stub)) cmp x0, x2 b.ne ftrace_graph_caller // ftrace_graph_caller(); - - mcount_exit #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ + mcount_exit ENDPROC(_mcount) #else /* CONFIG_DYNAMIC_FTRACE */ -- cgit