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Date:   Tue, 8 Sep 2020 15:30:17 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Greg Ungerer <gerg@linux-m68k.org>
Cc:     linux-m68k@vger.kernel.org, hch@lst.de, geert@linux-m68k.org,
        kernel test robot <lkp@intel.com>
Subject: Re: [PATCH] m68knommu: add missing __user annotations
Message-ID: <20200908133017.GA4042@lst.de>
References: <20200908132647.923201-1-gerg@linux-m68k.org>
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On Tue, Sep 08, 2020 at 11:26:47PM +1000, Greg Ungerer wrote:
> Some of the m68knommu user access functions are not using the __user
> annotation where required. Specifically __clear_user(), strnlen_user()
> and strncpy_from_user() need their user space source address annoted
> with __user.

You'll also need __force annotations to that sparse doesn't complain
inside the function.  Btw, it might be worth to just use the helpers
from asm-generic/uaccess.h as they should work for m68knommu.