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Date: Mon, 26 Jan 2004 14:44:00 -0500
From: Carlos O'Donell <carlos@baldric.uwo.ca>
To: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] semid64_ds compiled on a 32-bit system has wrong
	expected size for sem_ctime
Message-ID: <20040126194400.GI5351@baldric.uwo.ca>
References: <20040126192659.GH5351@baldric.uwo.ca>
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> struct semid64_ds {
>         struct ipc64_perm sem_perm;             /* permissions .. see ipc.h */
> #ifndef __LP64__
>         unsigned int    __pad1; 
> #endif
>         __kernel_time_t sem_otime;              /* last semop time */
> #ifndef __LP64__
>         unsigned int    __pad2; 
> #endif
>         __kernel_time_t sem_ctime;              /* last change time */
>         unsigned int    sem_nsems;              /* no. of semaphores in array */
>         unsigned int    __unused1;
>         unsigned int    __unused2;
> };

Our 32-bit userspace will see different values for this depending on
running a 32-bit kernel or 64-bit. That last sem_ctime should probably
have a padding so our 32-bit userspace sees the right thing all the
time.

Something like?

---
#ifndef __LP64__
	unsigned int	__pad3;
#endif
	__kernel_time_t sem_ctime;
---

c.