linux-kernel - Re: [PATCH] ftrace: makes ops_references

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Date:   Mon, 22 Aug 2022 00:28:58 -0700
From:   Song Liu <song@...nel.org>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ftrace: makes ops_references_rec() inline

On Sun, Aug 21, 2022 at 7:31 PM Kuninori Morimoto
<kuninori.morimoto.gx@...esas.com> wrote:
>
> commit 53cd885bc5c3e ("ftrace: Allow IPMODIFY and DIRECT ops on the
> same function") changed ops_references_rec() inline to function,
> thus we will get below error if .config doesn't have CONFIG_MODULES.
>
>   CC      kernel/trace/ftrace.o
> ${linux}/kernel/trace/ftrace.c:3149:1: error: 'ops_references_rec' \
> defined but not used [-Werror=unused-function]
>  3149 | ops_references_rec(struct ftrace_ops *ops, struct dyn_ftrace *rec)
>       | ^~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
> make[2]: *** [${linux}/scripts/Makefile.build:249: kernel/trace/ftrace.o] error 1
> make[1]: *** [${linux}/scripts/Makefile.build:466: kernel/trace] error 2
> make: *** [/opt/disk_cd/morimoto/linux/Makefile:1843: kernel] error 2
>
> This patch makes it to inline again, and fixes the issue.
>
> Fixes:  53cd885bc5c3e ("ftrace: Allow IPMODIFY and DIRECT ops on the same function")
> CC: Song Liu <song@...nel.org>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

Acked-by: Song Liu <song@...nel.org>

Thanks for the fix!