From mboxrd@z Thu Jan 1 00:00:00 1970 From: Masami Hiramatsu Subject: Re: next-20171103 build: 3 failures 22 warnings (next-20171103) Date: Sat, 4 Nov 2017 06:12:40 +0900 Message-ID: <20171104061240.0c56c5e9f3ede3341e8fd4a9@kernel.org> References: <20171104042729.2196dbe1ad905c71f18cbb1e@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Build bot for Mark Brown , Kernel Build Reports Mailman List , linaro-kernel@lists.linaro.org, Linux-Next Mailing List , Linux Kernel Mailing List , Stephen Hemminger , Networking , David Miller , Daniel Borkmann , Ian McDonald , Wei Yongjun To: Arnd Bergmann Return-path: In-Reply-To: Sender: linux-next-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Fri, 3 Nov 2017 21:16:21 +0100 Arnd Bergmann wrote: > On Fri, Nov 3, 2017 at 8:27 PM, Masami Hiramatsu wrote: > > On Fri, 3 Nov 2017 15:44:53 +0100 Arnd Bergmann wrote: > >> On Fri, Nov 3, 2017 at 1:44 PM, Build bot for Mark Brown wrote: > >> > >> > Warnings Summary: 22 > >> > 2 ../net/sctp/probe.c:240:2: warning: 'unregister_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/sctp/probe.c:194:3: warning: 'register_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/sctp/probe.c:189:2: warning: 'register_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/ipv4/tcp_probe.c:298:2: warning: 'unregister_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/ipv4/tcp_probe.c:280:2: warning: 'register_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/dccp/probe.c:190:2: warning: 'unregister_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/dccp/probe.c:170:4: warning: 'register_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 2 ../net/dccp/probe.c:166:2: warning: 'register_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 1 ../arch/arm/probes/kprobes/test-core.c:398:2: warning: 'unregister_jprobe' is deprecated [-Wdeprecated-declarations] > >> > 1 ../arch/arm/probes/kprobes/test-core.c:390:2: warning: 'register_jprobe' is deprecated [-Wdeprecated-declarations] > >> > >> I need a little help from Masami Hiramatsu to understand what the plan is here: > >> Do we just need to remove those files now that jprobes are gone, or do > >> we actually want to restore the functionality using some other replacement code? > >> > >> I'm asking because the __deprecated warning seems unhelpful if there > >> isn't an easy way to address the warning. > > > > It seems that the arm/probes case is just for testing, I'll just remove it > > because it's functionality is gone. > > Makes sense, thanks! > > > Others should be decided by network maintainers. Maybe those are not used anymore, > > or should be rewritten by kprobes or ftrace. > > Added a few people to cc that worked on {tcp,dccp,sctp}_probe in the past > for clarification. Do you already have plans to deal with this? As far as I can see, those features can not be fixed simply using kprobes because they are using function arguments. Fortunately we already have trace-events nowadays. So my suggestion is adding trace-events in the target function with required arguments, rewrite user-space tools to use ftrace, and remove the modules. Thank you, -- Masami Hiramatsu