Re: [PATCHv3] Make for_each_cpu_mask a bit smaller

[Ingo Molnar]

* Alexander van Heukelum <heukelum@xxxxxxxxxxxxx> wrote:

> The for_each_cpu_mask loop is used quite often in the kernel. It makes 
> use of two functions: first_cpu and next_cpu. This patch changes 
> for_each_cpu_mask to use only the latter. Because next_cpu finds the 
> next eligible cpu _after_ the given one, the iteration variable has to 
> be initialized to -1 and next_cpu has to be called with this value 
> before the first iteration. An x86_64 defconfig kernel (from 
> sched/latest) is about 2500 bytes smaller with this patch applied:
> 
>    text	   data	    bss	    dec	    hex	filename
> 6222517	 917952	 749932	7890401	 7865e1	vmlinux.orig
> 6219922	 917952	 749932	7887806	 785bbe	vmlinux
> 
> The same size reduction is seen for defconfig+MAXSMP
> 
>    text	   data	    bss	    dec	    hex	filename
> 6241772	2563968	1492716	10298456	 9d2458	vmlinux.orig
> 6239211	2563968	1492716	10295895	 9d1a57	vmlinux

applied for testing, thanks Alexander.

	Ingo
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