From 1958b046683bd6db04897364cfdf5a584fd7be14 Mon Sep 17 00:00:00 2001 From: Anders Roxell Date: Thu, 6 Dec 2018 12:55:37 +0100 Subject: [PATCH] kernel/kcov.c: mark func write_comp_data() as notrace Since __sanitizer_cov_trace_const_cmp4 is marked as notrace, the function called from __sanitizer_cov_trace_const_cmp4 shouldn't be tracable either. ftrace_graph_caller() gets called every time func write_comp_data() gets called if it isn't marked 'notrace'. This is the backtrace from gdb: Rework so that write_comp_data() that are called from __sanitizer_cov_trace_*_cmp*() are marked as 'notrace'. Signed-off-by: Arnd Bergmann Signed-off-by: Anders Roxell Co-developed-by: Arnd Bergmann --- kernel/kcov.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/kcov.c b/kernel/kcov.c index 97959d7b77e2..c2277dbdbfb1 100644 --- a/kernel/kcov.c +++ b/kernel/kcov.c @@ -112,7 +112,7 @@ void notrace __sanitizer_cov_trace_pc(void) EXPORT_SYMBOL(__sanitizer_cov_trace_pc); #ifdef CONFIG_KCOV_ENABLE_COMPARISONS -static void write_comp_data(u64 type, u64 arg1, u64 arg2, u64 ip) +static void notrace write_comp_data(u64 type, u64 arg1, u64 arg2, u64 ip) { struct task_struct *t; u64 *area; -- 2.19.2