From 67d4f6e3bf5dddced226fbf19704cdbbb0c98847 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Mon, 1 Nov 2021 16:39:07 +0100 Subject: [PATCH] ftrace/samples: Add missing prototype for my_direct_func There's compilation fail reported kernel test robot for W=1 build: >> samples/ftrace/ftrace-direct-multi.c:8:6: warning: no previous prototype for function 'my_direct_func' [-Wmissing-prototypes] void my_direct_func(unsigned long ip) The inlined assembly is used outside function, so we can't make my_direct_func static and pass it as asm input argument. However my_tramp is already extern so I think there's no problem keeping my_direct_func extern as well and just add its prototype. Link: https://lkml.kernel.org/r/20211101153907.377668-1-jolsa@kernel.org Reported-by: kernel test robot Fixes: 5fae941b9a6f ("ftrace/samples: Add multi direct interface test module") Signed-off-by: Jiri Olsa Signed-off-by: Steven Rostedt (VMware) --- samples/ftrace/ftrace-direct-multi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/samples/ftrace/ftrace-direct-multi.c b/samples/ftrace/ftrace-direct-multi.c index 2a5b1fb7ac14..b6d7806b400e 100644 --- a/samples/ftrace/ftrace-direct-multi.c +++ b/samples/ftrace/ftrace-direct-multi.c @@ -5,6 +5,8 @@ #include #include +extern void my_direct_func(unsigned long ip); + void my_direct_func(unsigned long ip) { trace_printk("ip %lx\n", ip); -- 2.20.1