linux-kernel - Re: [take12 0/3] kevent: Generic event handling mechanism.

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Date:	Wed, 23 Aug 2006 12:34:25 +0200
From:	"Jari Sundell" <sundell.software@...il.com>
To:	"Evgeniy Polyakov" <johnpol@....mipt.ru>
Cc:	"David Miller" <davem@...emloft.net>, kuznet@....inr.ac.ru,
	nmiell@...cast.net, linux-kernel@...r.kernel.org,
	drepper@...hat.com, akpm@...l.org, netdev@...r.kernel.org,
	zach.brown@...cle.com, hch@...radead.org
Subject: Re: [take12 0/3] kevent: Generic event handling mechanism.

On 8/23/06, Evgeniy Polyakov <johnpol@....mipt.ru> wrote:
>
> No, it will change sizes of the structure in kernelspace and userspace,
> so they just can not communicate.

struct kevent {
  uintptr_t ident;        /* identifier for this event */
  short     filter;       /* filter for event */
  u_short   flags;        /* action flags for kqueue */
  u_int     fflags;       /* filter flag value */

  union {
    u32       _data_padding[2];
    intptr_t  data;         /* filter data value */
  };

  union {
    u32       _udata_padding[2];
    void      *udata;       /* opaque user data identifier */
  };
};

I'm not missing anything obvious here, I hope.

Rakshasa
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