Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <c4d8e079-91bd-62e8-7725-b03802398c83@kernel.dk>
Date:   Wed, 12 Apr 2023 10:44:11 -0600
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101
 Thunderbird/102.9.0
Subject: Re: linux-next: build warnings after merge of the block tree
Content-Language: en-US
From:   Jens Axboe <axboe@kernel.dk>
To:     Josh Poimboeuf <jpoimboe@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>
Cc:     Stephen Rothwell <sfr@canb.auug.org.au>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
References: <20230327120017.6bb826d7@canb.auug.org.au>
 <20230327162630.wmxpycxhllt4clpt@treble>
 <20230328104719.65133586@canb.auug.org.au>
 <20230412073416.73a8ea1a@canb.auug.org.au>
 <20230411215518.u2fgi7napfcwyuce@treble>
 <4959d0b8-96fe-7fe5-8b36-7e0a266d1d17@kernel.dk>
 <20230412001400.yraku5fwsjdchxvk@treble>
 <20230412114400.GB628377@hirez.programming.kicks-ass.net>
 <20230412162517.gji52t34zlvcu5bh@treble>
 <6527c6fa-8908-1d8d-2f9e-bb7636a27874@kernel.dk>
In-Reply-To: <6527c6fa-8908-1d8d-2f9e-bb7636a27874@kernel.dk>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

On 4/12/23 10:35 AM, Jens Axboe wrote:
> On 4/12/23 10:25?AM, Josh Poimboeuf wrote:
>> On Wed, Apr 12, 2023 at 01:44:00PM +0200, Peter Zijlstra wrote:
>>> On Tue, Apr 11, 2023 at 05:14:00PM -0700, Josh Poimboeuf wrote:
>>>
>>>> Peter, what do you think, should we make track uaccess state across
>>>> function boundaries?
>>>
>>> So IIRC the goal was to explicitly dis-allow that. You want minimal code
>>> executed with STAC and hence disallow calling stuff.
>>
>> I guess I was wondering if we could make an exception for calls to
>> static IPA-optimized functions, so we wouldn't have to scramble to "fix"
>> compiler optimizations.
>>
>> But for now, yeah let's just keep it simple.
>>
>> Jens, can you confirm this works?  I added __noclone instead of removing
>> static.
> 
> Yep, works for me.

Want me to slap that patch on top of the branch that has the commit
that causes it?

-- 
Jens Axboe