On Wed, 9 Sep 2009, Sukadev Bhattiprolu wrote:
> 
> BTW, would it work if we defined 
> 
>       struct pid_set {
>               u64 pids;
>               int num_pids;
>       }
> 
> where ->pids can be still be a pointer ? The data structure would
> have the same size on all architectures.

I don't think that's all that great. Just go with the C90 version, we 
already have that thing in the kernel, and

        struct pid_set {
                int num_pids;
                pid_t pids[];
        };

looks simple and straightforward. And it even makes your example simpler, 
doesn't it? Ie now it's just

        struct pid_set pids = { 3, { 0, 97, 99 } };

and gcc should do the right thing.

(Of course, in any real case it would be dynamically allocated, but 
whatever).

                Linus
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