Re: [PATCH] Change ZERO_SIZE_PTR to point at unmapped space
From: Larry H.
Date: Sat May 30 2009 - 19:02:58 EST
On 15:29 Sat 30 May , Linus Torvalds wrote:
> On Sat, 30 May 2009, Larry H. wrote:
> > The ZERO_OR_NULL_PTR macro is changed accordingly. This patch does
> > not modify its behavior nor has any performance nor functionality
> > impact.
> I'm sure it makes a code generation difference, with (a) big constants and
> (b) no longer possible to merge the conditional into one single one.
Like I said in the reply to Peter, this is 3 extra bytes for amd64 with
gcc 4.3.3. I can't be bothered to check other architectures at the
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