From 08468754c16e731d31538a8b1b0b433be2410a89 Mon Sep 17 00:00:00 2001 From: Changbin Du Date: Tue, 10 Sep 2019 22:33:36 +0800 Subject: [PATCH] ftrace: Simplify ftrace hash lookup code in clear_func_from_hash() Function ftrace_lookup_ip() will check empty hash table. So we don't need extra check outside. Link: http://lkml.kernel.org/r/20190910143336.13472-1-changbin.du@gmail.com Signed-off-by: Changbin Du Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/ftrace.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index f9821a3..c4cc048 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -6036,11 +6036,7 @@ clear_func_from_hash(struct ftrace_init_func *func, struct ftrace_hash *hash) { struct ftrace_func_entry *entry; - if (ftrace_hash_empty(hash)) - return; - - entry = __ftrace_lookup_ip(hash, func->ip); - + entry = ftrace_lookup_ip(hash, func->ip); /* * Do not allow this rec to match again. * Yeah, it may waste some memory, but will be removed -- 2.7.4