linux-kernel - linux-next: build warning after merge of the ftrace tree

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Date:   Wed, 5 Aug 2020 14:21:36 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Muchun Song <songmuchun@...edance.com>,
        Chengming Zhou <zhouchengming@...edance.com>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: linux-next: build warning after merge of the ftrace tree

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);
      |   ^~~~~~~~~~~~~~~~~~~~

Introduced by commit

  0cb2f1372baa ("kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler")

-- 
Cheers,
Stephen Rothwell

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