Re: [tip:x86/mm] x86, mm: Use a bitfield to mask nuisance get_user()warnings

From: H. Peter Anvin
Date: Tue Feb 12 2013 - 12:35:56 EST

On 02/12/2013 09:32 AM, Linus Torvalds wrote:
On Tue, Feb 12, 2013 at 9:14 AM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:

No, I think what he is talking about it this bit:

Ok, I agree that the bitfield code actually looks cleaner.

That said, maybe gcc has an easier time using a few odd builtins and
magic typeof's. But at least the bitfield trick looks half-way

On the other hand, it still uses two gcc extensions: long long bitfields and typeof.

I'll see what kind of code we get with the macro.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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