Date: Mon, 20 Aug 2012 12:53:08 +0200
From: Pavel Machek <pavel@ucw.cz>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
        Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH v2 21/31] arm64: 32-bit (compat) applications support
Message-ID: <20120820105308.GA906@elf.ucw.cz>
References: <1344966752-16102-1-git-send-email-catalin.marinas@arm.com>
 <1344966752-16102-22-git-send-email-catalin.marinas@arm.com>
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Hi!

> This patch adds support for 32-bit applications. The vectors page is a
> binary blob mapped into the application user space at 0xffff0000 (the
> AArch64 toolchain does not support compilation of AArch32 code). Full
> compatibility with ARMv7 user space is supported. The use of deprecated
> ARMv7 functionality (SWP, CP15 barriers) has been disabled by default on
> AArch64 kernels and unaligned LDM/STM is not supported.
> 
> Please note that only the ARM 32-bit EABI is supported, so no OABI
> compatibility.

> +struct compat_statfs {
> +	int		f_type;
> +	int		f_bsize;
> +	int		f_blocks;
> +	int		f_bfree;
> +	int		f_bavail;
> +	int		f_files;
> +	int		f_ffree;
> +	compat_fsid_t	f_fsid;
> +	int		f_namelen;	/* SunOS ignores this field. */

I'm sure it does. But is it good comment?

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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