linux-kernel - Re: [PSEUDOPATCH] rename is_compat

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Message-ID: <20151207234252.GI20997@ZenIV.linux.org.uk>
Date:	Mon, 7 Dec 2015 23:42:52 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	X86 ML <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-arch <linux-arch@...r.kernel.org>
Subject: Re: [PSEUDOPATCH] rename is_compat_task

On Tue, Dec 08, 2015 at 12:16:51AM +0100, Arnd Bergmann wrote:

> As far as I know, x86 is the special case here, on all other architectures,
> this actually checks the task, and it's impossible to call a system call
> of the other kind.

sparc uses
	ta 0x10
for 32bit syscalls and
	ta 0x6d
for 64bit ones.  And yes, the same process can call both just fine.
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