linux-kernel - Re: [RFC 12/12] asm-generic: simplify asm/unaligned.h

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Date:   Fri, 7 May 2021 16:54:53 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-arch <linux-arch@...r.kernel.org>,
        Vineet Gupta <vgupta@...opsys.com>,
        Arnd Bergmann <arnd@...db.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 12/12] asm-generic: simplify asm/unaligned.h

On Fri, May 7, 2021 at 3:12 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
>
> The get_unaligned()/put_unaligned() implementations are much more complex
> than necessary, now that all architectures use the same code.

Thanks for doing this, it looks good to me.

I suspect it's still slightly unnecessarily complicated - why is that
get_unaligned() not just

  #define get_unaligned(ptr) \
        __get_unaligned_t(typeof(*__ptr), __ptr)

Because I'm not seeing the reason for doing that "__auto_type __ptr"
thing - the argument to a "typeof()" isn't actually evaluated.

Maybe I'm just nit-picking, this certainly is a huge improvement regardless.

             Linus