linux-kernel - Re: [PATCH 6/8] Use __kernel_ulong_t in x86 struct semid64

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Message-ID: <CAMe9rOoKvJNkhHLwF+gfX1T8M=ekBvCJn7PJ61U9-_OvcB-tKQ@mail.gmail.com>
Date:	Tue, 21 Jan 2014 10:06:11 -0800
From:	"H.J. Lu" <hjl.tools@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/8] Use __kernel_ulong_t in x86 struct semid64_ds

On Tue, Jan 21, 2014 at 9:10 AM, Catalin Marinas
<catalin.marinas@....com> wrote:
> On Fri, Dec 27, 2013 at 05:25:10PM +0000, H.J. Lu wrote:
>> Both x32 and x86-64 use the same struct semid64_ds for system calls.
>> But x32 long is 32-bit. This patch replaces unsigned long with
>> __kernel_ulong_t in x86 struct semid64_ds.
>>
>> Signed-off-by: H.J. Lu <hjl.tools@...il.com>
>> ---
>>  arch/x86/include/uapi/asm/sembuf.h | 10 +++++-----
>>  1 file changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/arch/x86/include/uapi/asm/sembuf.h b/arch/x86/include/uapi/asm/sembuf.h
>> index ee50c80..cc2d6a3 100644
>> --- a/arch/x86/include/uapi/asm/sembuf.h
>> +++ b/arch/x86/include/uapi/asm/sembuf.h
>> @@ -13,12 +13,12 @@
>>  struct semid64_ds {
>>       struct ipc64_perm sem_perm;     /* permissions .. see ipc.h */
>>       __kernel_time_t sem_otime;      /* last semop time */
>> -     unsigned long   __unused1;
>> +     __kernel_ulong_t __unused1;
>>       __kernel_time_t sem_ctime;      /* last change time */
>> -     unsigned long   __unused2;
>> -     unsigned long   sem_nsems;      /* no. of semaphores in array */
>> -     unsigned long   __unused3;
>> -     unsigned long   __unused4;
>> +     __kernel_ulong_t __unused2;
>> +     __kernel_ulong_t sem_nsems;     /* no. of semaphores in array */
>> +     __kernel_ulong_t __unused3;
>> +     __kernel_ulong_t __unused4;
>>  };
>
> Since you are at this, could you please change the
> include/uapi/asm-generic/sembuf.h structure as well?
>

I could, but my build doesn't use that header file.  I prefer not to
change something I can't test.

I am enclosing a program to check kernel uabi header files
against glibc header files.  You can try it on ILP32 ARM64.

-- 
H.J.

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