linux-kernel - Re: [PATCH] uprobes: Use synchronize_rcu() not synchronize

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Date:   Fri, 10 Aug 2018 13:42:02 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH] uprobes: Use synchronize_rcu() not synchronize_sched()

On 08/10, Oleg Nesterov wrote:
>
> @@ -920,7 +918,8 @@ probe_event_enable(struct trace_uprobe *
>  	ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);
>  	if (ret)
>  		goto err_buffer;
> -
> + add:
> +	list_add_tail_rcu(&link->list, &tu->tp.files);

	if (link)
		list_add_tail_rcu(&link->list, &tu->tp.files);

Oleg.