Messages in this thread | | | Date | Sat, 30 May 2009 16:00:22 -0700 | From | "Larry H." <> | Subject | Re: [PATCH] Change ZERO_SIZE_PTR to point at unmapped space |
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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 moment.
Larry
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