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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>
This commit is contained in:
Changbin Du 2019-09-10 22:33:36 +08:00 committed by Steven Rostedt (VMware)
parent ac68154626
commit 08468754c1
1 changed files with 1 additions and 5 deletions
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6
kernel/trace/ftrace.c
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@ -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