Re: [PATCH] for_each_possible_cpu [1/19] defines for_each_possible_cpu

[Nick Piggin]

KAMEZAWA Hiroyuki wrote:
> Now,
> for_each_cpu() is for-loop cpu over cpu_possible_map.
> for_each_online_cpu is for-loop cpu over cpu_online_map.
> .....for_each_cpu() looks bad name.
>
> This patch renames for_each_cpu() as for_each_possible_cpu().
>
> I also wrote patches to replace all for_each_cpu with for_each_possible_cpu.
> please confirm....
>
> BTW, when HOTPLUC_CPU is not suppoted, using for_each_possible_cpu()
> should be avoided, I think.
>
> all patches are against 2.6.16-rc6-mm1.

for_each_cpu() effectively is for_each_possible_cpu() as far as
generic code is concerned. In other words, nobody would ever expect
for_each_cpu to return an _impossible_ CPU, thus you are just
adding a redundant element to the name.

The only places where things might care is arch bootup code, but
the cpu interface is such that the arch code is expected to _hide_
any weird details from these generic interfaces.

--
SUSE Labs, Novell Inc.
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