Re: [PATCH 08/10] Use __kernel_ulong_t in struct msqid64_ds

[H.J. Lu]

On Thu, May 17, 2012 at 8:49 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Thu, May 17, 2012 at 8:39 PM, H.J. Lu <hjl.tools@xxxxxxxxx> wrote:
>>
>> That will be wrong.   __BITS_PER_LONG defines # bits of long
>> as seen by kernel.  We don't use it in user space.
>
> Yes you do. Exactly in that structure that Peter points to. *Exactly*
> because that structure uses "long" instead of some fixed size. Which
> will be different in user mode than in kernel mode.
>
> And if user mode doesn't use these headers at all, then we should stop
> playing the insane games.
>
>                     Linus

We need kernel headers for constants used in system calls.  But I don't
mind if kernel stops exporting data structures to user space.


-- 
H.J.
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