linux-kernel - Re: [PATCH] printk: Userspace format enumeration support

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Date:   Fri, 5 Feb 2021 00:47:58 +0000
From:   Chris Down <chris@...isdown.name>
To:     linux-kernel@...r.kernel.org
Cc:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        John Ogness <john.ogness@...utronix.de>,
        Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>, kernel-team@...com
Subject: Re: [PATCH] printk: Userspace format enumeration support

Some improvements I noticed that I'll include when sending v2.

Chris Down writes:
>+static void remove_printk_fmt_sec(const struct module *mod)
>+{
>+	struct printk_fmt_sec *tmp = NULL, *ps = NULL;
>+	const char **fptr = NULL;

fptr can be scoped to list_for_each_entry_safe, I'll move it.

>+static int proc_pf_show(struct seq_file *s, void *v)
>+{
>+	const struct printk_fmt_sec *ps = NULL;
>+	const char **fptr = NULL;

Ditto for list_for_each_entry.

>+
>+	mutex_lock(&printk_fmts_mutex);
>+
>+	list_for_each_entry(ps, &printk_fmts_list, list) {
>+		const char *mod_name = ps_get_module_name(ps);
>+
>+		for (fptr = ps->start; fptr < ps->end; fptr++) {
>+			seq_puts(s, mod_name);
>+			seq_putc(s, ',');
>+			seq_puts(s, *fptr);
>+			seq_putc(s, '\0');
>+		}
>+	}

Not sure why I didn't just use seq_printf here. I'll do that.

I'll wait a few days for feedback then will send v2 either way. :-)