Re: [PATCH v4 0/7] arm64: untag user pointers passed to the kernel

On Wed, Jun 27, 2018 at 06:17:58PM +0100, Catalin Marinas wrote:

sparse is indeed an option. The current implementation doesn't warn on an explicit cast from (void __user *) to (unsigned long) since that's a valid thing in the kernel. I couldn't figure out if there's any other __attribute__ that could be used to warn of such conversion.

Hi,

sparse doesn't have such attribute but would an new option that would warn on such cast be a solution for your case?

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