Commit 08468754 authored Sep 10, 2019 by Changbin Du Committed by Steven Rostedt (VMware) Sep 17, 2019

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 <changbin.du@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent ac681546

kernel/trace/ftrace.c

+1 −5

Original line number	Diff line number	Diff line
		@@ -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