linux-kernel - Re: [PATCH 0/8] Update kernel uabi header files for x32

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Date:	Tue, 21 Jan 2014 09:06:59 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"H.J. Lu" <hjl.tools@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
CC:	linux-arch <linux-arch@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 0/8] Update kernel uabi header files for x32

On 12/27/2013 02:14 PM, H.J. Lu wrote:
> X32 uses the same kernel system call interface as x86-64 for many
> system calls.  However, "long" is 64-bit for x86-64 and is 32-bit for
> x32.  Where long or unsigned long are used in struct types for such
> system calls, they are wrong for x32.  __kernel_[u]long_t is [unsigned]
> long for all ABIs other than x32.  I am submitting 8 patches to replace
> long or unsigned long with __kernel_[u]long_t so that those struct types
> can be used with x32 system calls.
> 
> H.J. Lu (8):
>   Use __kernel_long_t in struct timex
>   Use __kernel_long_t/__kernel_ulong_t in <linux/resource.h>
>   Use __kernel_ulong_t in uapi struct ipc64_perm
>   Use __kernel_long_t in struct msgbuf
>   Use __kernel_ulong_t in struct msqid64_ds
>   Use __kernel_ulong_t in x86 struct semid64_ds
>   Use __kernel_ulong_t in shmid64_ds/shminfo64/shm_info
>   Use __kernel_long_t in struct mq_attr
> 

As Catalin indirectly pointed out, I had made a followup to the wrong
version of the patchset (because I commented to Christoph's feedback.)
This is threaded to the proper version (without unnecessary #if
__BITS_PER_LONG.)

	-hpa
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