Messages in this thread Patch in this message | | | Date | Thu, 19 Sep 2019 19:23:14 -0400 | From | Steven Rostedt <> | Subject | [for-next][PATCH 1/8] ftrace: Simplify ftrace hash lookup code in clear_func_from_hash() |
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From: Changbin Du <changbin.du@gmail.com>
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> --- 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 f9821a3374e9..c4cc048eb594 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 -- 2.20.1
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