Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Mon, 24 Aug 2020 14:32:47 +0200
From:   Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To:     Lokesh Gidra <lokeshgidra@google.com>
Cc:     Kees Cook <keescook@chromium.org>,
        Jonathan Corbet <corbet@lwn.net>, Peter Xu <peterx@redhat.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Stephen Smalley <stephen.smalley.work@gmail.com>,
        Eric Biggers <ebiggers@kernel.com>,
        Daniel Colascione <dancol@dancol.org>,
        "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org, kaleshsingh@google.com,
        calin@google.com, surenb@google.com, nnk@google.com,
        jeffv@google.com, kernel-team@android.com,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        Shaohua Li <shli@fb.com>, Jerome Glisse <jglisse@redhat.com>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Mel Gorman <mgorman@techsingularity.net>,
        Nitin Gupta <nigupta@nvidia.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Iurii Zaikin <yzaikin@google.com>,
        Luis Chamberlain <mcgrof@kernel.org>,
        Daniel Colascione <dancol@google.com>
Subject: Re: [PATCH v2 1/2] Add UFFD_USER_MODE_ONLY
Message-ID: <20200824123247.finquufqpr6i7umb@linutronix.de>
References: <20200822014018.913868-1-lokeshgidra@google.com>
 <20200822014018.913868-2-lokeshgidra@google.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <20200822014018.913868-2-lokeshgidra@google.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 2020-08-21 18:40:17 [-0700], Lokesh Gidra wrote:
> --- a/fs/userfaultfd.c
> +++ b/fs/userfaultfd.c
> @@ -1966,6 +1969,7 @@ static void init_once_userfaultfd_ctx(void *mem)
>  
>  SYSCALL_DEFINE1(userfaultfd, int, flags)
>  {
> +	static const int uffd_flags = UFFD_USER_MODE_ONLY;
>  	struct userfaultfd_ctx *ctx;
>  	int fd;
Why?

Sebastian