linux-kernel - Re: [PATCH 05/98] exynos_drm.h: use _

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150601093808.GP2067@n2100.arm.linux.org.uk>
Date:	Mon, 1 Jun 2015 10:38:09 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Christian König <christian.koenig@....com>
Cc:	Mikko Rapeli <mikko.rapeli@....fi>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-samsung-soc@...r.kernel.org, linux-api@...r.kernel.org,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 05/98] exynos_drm.h: use __u64 from linux/types.h

On Mon, Jun 01, 2015 at 11:08:21AM +0200, Christian König wrote:
> Yeah, completely agree with Linus on the visibility problem and that's
> exactly the reason why we don't include <stdint.h> in the kernel header and
> expect userspace to define the ISO types somewhere.
> 
> But using the types from "include/linux/types.h" and especially including it
> into the uapi headers doesn't make the situation better, but rather worse.
> 
> With this step we not only make the headers depend on another header that
> isn't part of the uapi, but also pollute the user space namespace with __sXX
> and __uXX types which aren't defined anywhere else.

1) Header files are permitted to pollute userspace with __-defined stuff.

2) __[su]XX types are defined as part of the kernel's uapi.
   include/uapi/linux/types.h includes asm/types.h, which in userspace
   picks up include/uapi/asm-generic/types.h.  That picks up
   asm-generic/int-ll64.h, which defines these types.

Moreover, this is done throughout the kernel headers _already_ (as you
would expect for a policy set 10+ years ago).

Please, I'm not interested in this discussion, so please don't argue
with me - I may agree with your position, but what you think and what
I think are really not relevant here.  If you have a problem, take it
up with Linus - I made that clear in my email.

-- 
FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to speedtest.net.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/