linux-kernel - linux-next: build failure after merge of the vfs tree

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Message-ID: <20200924183038.3c6da86e@canb.auug.org.au>
Date:   Thu, 24 Sep 2020 18:30:38 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Al Viro <viro@...IV.linux.org.uk>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...e.de>
Subject: linux-next: build failure after merge of the vfs tree

Hi all,

After merging the vfs tree, today's linux-next build (x86_64 allnoconfig)
failed like this:

arch/x86/include/asm/barrier.h: Assembler messages:
arch/x86/include/asm/barrier.h:41: Error: operand type mismatch for `cmp'
arch/x86/include/asm/barrier.h:41: Error: operand type mismatch for `cmp'

and many more ...

Caused by commit

  e33ea6e5ba6a ("x86/uaccess: Use pointer masking to limit uaccess speculation")

I am not exactly sure why (but reverting it fixes the build).

I have reverted that commit for today.

-- 
Cheers,
Stephen Rothwell

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