linux-kernel - Re: [PATCH 08/10] Use __kernel_ulong_t in struct msqid64

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Date:	Thu, 17 May 2012 17:45:33 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>,
	Ralf Baechle <ralf@...ux-mips.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H.J. Lu" <hjl.tools@...il.com>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, mingo@...nel.org, tglx@...utronix.de
Subject: Re: [PATCH 08/10] Use __kernel_ulong_t in struct msqid64_ds

On 05/17/2012 05:31 PM, H. Peter Anvin wrote:
> On 05/17/2012 05:29 PM, David Daney wrote:
>>
>> I don't know if that answers your question though.
>>
>
> Not in the slightest.  The question is how on Earth struct msqid64_ds
> isn't botched on MIPS.

It is botched.

#if defined(CONFIG_32BIT) && defined(CONFIG_CPU_LITTLE_ENDIAN) come out 
in the userspace header file.

On mips it would appear that asm/msgbuf.h is not unique in this manner:

# grep CONFIG *.h
fcntl.h:#ifdef CONFIG_32BIT
fcntl.h:#endif /* CONFIG_32BIT */
ioctls.h:#define TIOCSERCONFIG	0x5488
msgbuf.h:#if defined(CONFIG_32BIT) && !defined(CONFIG_CPU_LITTLE_ENDIAN)
msgbuf.h:#if defined(CONFIG_32BIT) && defined(CONFIG_CPU_LITTLE_ENDIAN)
msgbuf.h:#if defined(CONFIG_32BIT) && !defined(CONFIG_CPU_LITTLE_ENDIAN)
msgbuf.h:#if defined(CONFIG_32BIT) && defined(CONFIG_CPU_LITTLE_ENDIAN)
msgbuf.h:#if defined(CONFIG_32BIT) && !defined(CONFIG_CPU_LITTLE_ENDIAN)
msgbuf.h:#if defined(CONFIG_32BIT) && defined(CONFIG_CPU_LITTLE_ENDIAN)
ptrace.h:#ifdef CONFIG_32BIT
ptrace.h:#ifdef CONFIG_CPU_HAS_SMARTMIPS
ptrace.h:#ifdef CONFIG_MIPS_MT_SMTC
ptrace.h:#endif /* CONFIG_MIPS_MT_SMTC */
ptrace.h:#ifdef CONFIG_CPU_CAVIUM_OCTEON
resource.h:#ifdef CONFIG_32BIT
siginfo.h:#ifdef CONFIG_32BIT
siginfo.h:#ifdef CONFIG_64BIT
swab.h:#ifdef CONFIG_CPU_MIPSR2
swab.h: * Having already checked for CONFIG_CPU_MIPSR2, enable the
swab.h:#ifdef CONFIG_64BIT
swab.h:#endif /* CONFIG_64BIT */
swab.h:#endif /* CONFIG_CPU_MIPSR2 */

David Daney
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