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Date:   Thu, 16 Jun 2022 12:18:57 -0700
From:   Linus Torvalds <>
To:     Matthew Wilcox <>
Cc:     "Jason A. Donenfeld" <>,
        Linux-MM <>,
        linux-xfs <>,,
        Linux Kernel Mailing List <>,
        Uladzislau Rezki <>,
        Kees Cook <>,
        Greg Kroah-Hartman <>,
        Joe Perches <>
Subject: Re: [PATCH] usercopy: use unsigned long instead of uintptr_t

On Thu, Jun 16, 2022 at 12:14 PM Linus Torvalds
<> wrote:
> In that situation, we'd probably just see "long long" being 128-bit
> ("I32LP64LL128").

Looking around, it looks like people prefer "long long long" (or in
the kernel, just "u128") for this, because so many have already gotten
used to "long long" being 64-bit, and 32-bit architectures (where
"long" is 32-bit and "long long" is 64-bit) are still relevant enough
that people want to keep that.


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