linux-kernel - Re: linux-next: build warnings after merge of the block tree

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Date:   Tue, 11 Apr 2023 16:30:07 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warnings after merge of the block tree

On 4/11/23 3:34?PM, Stephen Rothwell wrote:
> Hi all,
> 
> On Tue, 28 Mar 2023 10:47:19 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>>
>> On Mon, 27 Mar 2023 09:26:30 -0700 Josh Poimboeuf <jpoimboe@...nel.org> wrote:
>>>
>>> On Mon, Mar 27, 2023 at 12:00:17PM +1100, Stephen Rothwell wrote:  
>>>>
>>>> After merging the block tree, today's linux-next build (x86_64
>>>> allnoconfig) produced these warnings:
>>>>
>>>> lib/iov_iter.o: warning: objtool: .altinstr_replacement+0x0: redundant UACCESS d
>>>> isable
>>>> lib/iov_iter.o: warning: objtool: iovec_from_user.part.0+0xc7: call to copy_comp
>>>> at_iovec_from_user.part.0() with UACCESS enabled
>>>> lib/iov_iter.o: warning: objtool: __import_iovec+0x21d: call to copy_compat_iovec_from_user.part.0() with UACCESS enabled
>>>>
>>>> Presumably introduced by commit
>>>>
>>>>   6376ce56feb6 ("iov_iter: import single vector iovecs as ITER_UBUF")    
>>>
>>> I'm not able to recreate.  What's your compiler version?  
>>
>> $ x86_64-linux-gnu-gcc --version
>> x86_64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0
> 
> Any progress?

Honestly I have no idea what it's complaining about. It's obviously the
compat copy, but everything seems fine to me?

-- 
Jens Axboe