Declare ftrace_get_parent_ra_addr() as static to suppress clang compiler warning that 'no previous prototype'. This function is not intended to be called from other parts. Fix follow error with clang-19: arch/mips/kernel/ftrace.c:251:15: error: no previous prototype for function 'ftrace_get_parent_ra_addr' [-Werror,-Wmissing-prototypes] 251 | unsigned long ftrace_get_parent_ra_addr(unsigned long self_ra, unsigned long | ^ arch/mips/kernel/ftrace.c:251:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 251 | unsigned long ftrace_get_parent_ra_addr(unsigned long self_ra, unsigned long | ^ | static 1 error generated. Signed-off-by: WangYuli <wangyuli@xxxxxxxxxxxxx> --- arch/mips/kernel/ftrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c index 8c401e42301c..f39e85fd58fa 100644 --- a/arch/mips/kernel/ftrace.c +++ b/arch/mips/kernel/ftrace.c @@ -248,7 +248,7 @@ int ftrace_disable_ftrace_graph_caller(void) #define S_R_SP (0xafb0 << 16) /* s{d,w} R, offset(sp) */ #define OFFSET_MASK 0xffff /* stack offset range: 0 ~ PT_SIZE */ -unsigned long ftrace_get_parent_ra_addr(unsigned long self_ra, unsigned long +static unsigned long ftrace_get_parent_ra_addr(unsigned long self_ra, unsigned long old_parent_ra, unsigned long parent_ra_addr, unsigned long fp) { unsigned long sp, ip, tmp; -- 2.45.2