linux-kernel - Re: [PATCH v3 4/7] tracing: Add synthetic event error logging

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Date:   Tue, 13 Oct 2020 11:37:09 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Tom Zanussi <zanussi@...nel.org>
Cc:     axelrasmussen@...gle.com, mhiramat@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/7] tracing: Add synthetic event error logging

On Tue, 13 Oct 2020 09:17:55 -0500
Tom Zanussi <zanussi@...nel.org> wrote:

> +static int save_cmdstr(int argc, const char *name, const char **argv)
> +{
> +        struct seq_buf s;
> +	char *buf;
> +	int i;
> +
> +        buf = kzalloc(MAX_DYNEVENT_CMD_LEN, GFP_KERNEL);
> +        if (!buf)
> +                return -ENOMEM;
> +
> +        seq_buf_init(&s, buf, MAX_DYNEVENT_CMD_LEN);
> +
> +        seq_buf_puts(&s, name);
> +
> +        for (i = 0; i < argc; i++) {
> +                seq_buf_putc(&s, ' ');
> +                seq_buf_puts(&s, argv[i]);
> +        }
> +
> +        if (!seq_buf_buffer_left(&s)) {
> +                synth_err(SYNTH_ERR_CMD_TOO_LONG, 0);
> +                kfree(buf);
> +                return -EINVAL;
> +        }
> +        buf[s.len] = 0;
> +        last_cmd_set(buf);
> +
> +        kfree(buf);
> +        return 0;
> +}

I see you cut and pasted this ;-)

I fixed up the whitespace.

-- Steve