linux-kernel - Re: [PATCH v2] printk: Userspace format enumeration support

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Date:   Tue, 9 Feb 2021 13:14:58 +0000
From:   Chris Down <chris@...isdown.name>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, 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>,
        Steven Rostedt <rostedt@...dmis.org>,
        Kees Cook <keescook@...omium.org>, kernel-team@...com
Subject: Re: [PATCH v2] printk: Userspace format enumeration support

Greg Kroah-Hartman writes:
>How can file ever be NULL?
>
>And if it is an error, what is the problem here?  You can always feed
>the output of a debugfs_* call back into debugfs, and you never need to
>check the return values.

Oh, thanks -- that's helpful to know. Looks like I misread 
debugfs_create_{file,dir}. :-)

I'll send v3.