From: Steven Rostedt <rostedt@goodmis.org>
To: Muchun Song <songmuchun@bytedance.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Chengming Zhou <zhouchengming@bytedance.com>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: Re: [External] linux-next: build warning after merge of the ftrace tree
Date: Wed, 5 Aug 2020 11:11:05 -0400 [thread overview]
Message-ID: <20200805111105.081276bb@oasis.local.home> (raw)
In-Reply-To: <CAMZfGtX0a3tui_KQfCXLcARVcev9V-HV6HMkXgVXObq8w-4EQg@mail.gmail.com>
On Wed, 5 Aug 2020 12:53:39 +0800
Muchun Song <songmuchun@bytedance.com> wrote:
> On Wed, Aug 5, 2020 at 12:21 PM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> >
> > Hi all,
> >
> > After merging the ftrace tree, today's linux-next build (powerpc
> > ppc64_defconfig) produced this warning:
> >
> > kernel/kprobes.c: In function 'kill_kprobe':
> > kernel/kprobes.c:1116:33: warning: statement with no effect [-Wunused-value]
> > 1116 | #define disarm_kprobe_ftrace(p) (-ENODEV)
> > | ^
> > kernel/kprobes.c:2154:3: note: in expansion of macro 'disarm_kprobe_ftrace'
> > 2154 | disarm_kprobe_ftrace(p);
> > | ^~~~~~~~~~~~~~~~~~~~
> >
>
> Sorry, maybe we should rework the macro of disarm_kprobe_ftrace to an
> inline function like below.
>
> -#define disarm_kprobe_ftrace(p) (-ENODEV)
> +static inline int disarm_kprobe_ftrace(struct kprobe *p)
> +{
> + return -ENODEV
> +}
> #endif
Looks like that would work. Care to send a formal patch. Could you also
change arm_kprobe_ftrace() as well?
Thanks!
-- Steve
next prev parent reply other threads:[~2020-08-05 20:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-05 4:21 linux-next: build warning after merge of the ftrace tree Stephen Rothwell
2020-08-05 4:53 ` [External] " Muchun Song
2020-08-05 15:11 ` Steven Rostedt [this message]
2020-08-05 15:51 ` Muchun Song
2020-08-05 17:04 ` Masami Hiramatsu
2020-08-05 17:09 ` Steven Rostedt
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