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Date: Mon, 20 Feb 2012 20:22:00 -0800 From: "H. Peter Anvin" <hpa@...or.com> To: Linus Torvalds <torvalds@...ux-foundation.org> CC: David Miller <davem@...emloft.net>, thomas@...3r.de, raven@...maw.net, linux-kernel@...r.kernel.org Subject: Re: Linux 3.3-rc4 On 02/19/2012 12:02 PM, Linus Torvalds wrote: > On Sun, Feb 19, 2012 at 11:49 AM, David Miller <davem@...emloft.net> wrote: >> >> A real shame, this should have used "__aligned_u64" from the >> beginning. > > I agree. Sadly, this is exactly the kind of thing that is *really* > easy to overlook, and once it is overlooked we're screwed because > fixing it just breaks the native 32-bit case. > I'm starting to think we should compile the kernel with -Wpadded by default (currently it's only done at "warning level 3", which I doubt anyone ever uses, especially since that also includes -Wpacked which is an actively toxic warning) and force people to add explicit padding where it needs to go, if necessary. Unfortunately even that doesn't guarantee compatibility with userspace, but it's at least something. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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