From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753141AbdATTyy (ORCPT ); Fri, 20 Jan 2017 14:54:54 -0500 Received: from smtprelay0163.hostedemail.com ([216.40.44.163]:52289 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752412AbdATTyx (ORCPT ); Fri, 20 Jan 2017 14:54:53 -0500 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1540:1593:1594:1711:1730:1747:1777:1792:2393:2553:2559:2562:3138:3139:3140:3141:3142:3352:3622:3865:3866:3867:3868:3872:5007:6261:7875:10004:10400:10848:10967:11026:11232:11473:11658:11914:12296:12438:12740:12760:12895:13069:13161:13180:13229:13311:13357:13439:14096:14097:14181:14659:14721:21080:30054:30090:30091,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:2,LUA_SUMMARY:none X-HE-Tag: skirt76_8f2baaaefe4a X-Filterd-Recvd-Size: 1869 Date: Fri, 20 Jan 2017 14:54:20 -0500 From: Steven Rostedt To: Namhyung Kim Cc: LKML , Ingo Molnar Subject: Re: [PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip Message-ID: <20170120145420.5fc3018a@gandalf.local.home> In-Reply-To: <20170120024447.26097-2-namhyung@kernel.org> References: <20170120024447.26097-1-namhyung@kernel.org> <20170120024447.26097-2-namhyung@kernel.org> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 20 Jan 2017 11:44:46 +0900 Namhyung Kim wrote: > --- a/kernel/trace/trace.h > +++ b/kernel/trace/trace.h > @@ -787,6 +787,20 @@ extern void __trace_graph_return(struct trace_array *tr, > struct ftrace_graph_ret *trace, > unsigned long flags, int pc); > > +struct ftrace_hash { > + unsigned long size_bits; > + struct hlist_head *buckets; > + unsigned long count; > + struct rcu_head rcu; > +}; > + > +struct ftrace_func_entry * > +ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip); > + > +static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash) > +{ > + return !hash || !hash->count; > +} Note, I had to modify this patch and move this declaration outside of the #ifdef CONFIG_FUNCTION_GRAPH_TRACER, as it failed to build when function graph wasn't enabled. Function tracer uses this too. -- Steve > > #ifdef CONFIG_DYNAMIC_FTRACE > /* TODO: make this variable */