From: Arnd Bergmann <arnd@arndb.de>
To: Andrei Warkentin <andreiw@motorola.com>
Cc: Chris Ball <cjb@laptop.org>, linux-mmc@vger.kernel.org
Subject: Re: [PATCHv4] MMC: MMC boot partitions support.
Date: Thu, 31 Mar 2011 13:01:11 +0200 [thread overview]
Message-ID: <201103311301.12053.arnd@arndb.de> (raw)
In-Reply-To: <AANLkTinmVNGpmjLNB31nuBke+LD+jJ8AbwNGp14tH+d2@mail.gmail.com>
On Thursday 31 March 2011, Andrei Warkentin wrote:
> Well, there are less esoteric ways of turning something into a
> paperweight =). No, the whole point of adding the device partition
> support is so you don't have to go through hoops to read and write
> them.
Agreed.
> The scenario where it matters (embedded Linux devices booting through
> boot partitions) are such, that if you went through sufficient hoops
> to get root access, and can build and boot a kernel to enable these
> options for that device, then you must know what you're doing, and a
> warning message in the Kconfig help is sufficient. The generic case of
> people sticking cards into a PCI SDHCI controller under Ubuntu is such
> that you can do no real damage.
One possible way of dealing with this would be to make the boot partition
a character device instead of a block device. That would still allow
you to overwrite it, but make it very obvious that you cannot mount or
partition it.
On the other hand, it would be a rather esoteric interface, since the
hardware is still fundamentally block based, we just use it in a different
way.
Arnd
next prev parent reply other threads:[~2011-03-31 11:01 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-19 11:18 MMC/eMMC partitioning support Andrei Warkentin
2011-03-19 11:18 ` [RFC] MMC: MMC boot partitions support Andrei Warkentin
2011-03-19 12:13 ` Andrei Warkentin
2011-03-21 14:19 ` [PATCH] " Andrei Warkentin
2011-03-22 3:54 ` [PATCHv3] " Andrei Warkentin
2011-03-22 21:11 ` MMC partitions support (4th revision) Andrei Warkentin
2011-03-22 21:11 ` [PATCHv4] MMC: MMC boot partitions support Andrei Warkentin
2011-03-29 22:45 ` Andrei Warkentin
2011-03-30 12:03 ` Arnd Bergmann
2011-03-30 20:07 ` Andrei Warkentin
2011-03-30 22:43 ` Chris Ball
2011-03-30 22:46 ` Chris Ball
2011-03-30 23:18 ` Andrei Warkentin
2011-03-30 23:34 ` Chris Ball
2011-03-31 6:57 ` Andrei Warkentin
2011-03-31 11:01 ` Arnd Bergmann [this message]
2011-03-31 19:17 ` Andrei Warkentin
2011-03-31 19:37 ` Chris Ball
2011-03-31 20:01 ` Andrei Warkentin
2011-03-31 20:03 ` Chris Ball
2011-03-31 20:01 ` Andrei Warkentin
2011-04-01 9:23 ` Arnd Bergmann
2011-04-01 14:52 ` Chris Ball
2011-04-01 9:21 ` Arnd Bergmann
2011-03-31 11:17 ` Arnd Bergmann
2011-03-31 19:29 ` Andrei Warkentin
2011-04-01 10:38 ` Arnd Bergmann
2011-04-01 18:42 ` Andrei Warkentin
2011-04-01 19:25 ` Arnd Bergmann
2011-04-01 19:42 ` Andrei Warkentin
2011-04-04 12:22 ` [PATCH] " Andrei Warkentin
2011-04-04 11:52 ` Andrei Warkentin
2011-04-11 21:13 ` [patchv3 1/4] MMC: Rename erase_timeout to cmd_timeout_ms Andrei Warkentin
2011-04-11 21:13 ` [patchv3 2/4] MMC: SDHCI R1B command handling + MMC_CAP_ERASE Andrei Warkentin
2011-04-12 9:06 ` Dong, Chuanxiao
2011-04-12 18:05 ` Andrei Warkentin
2011-04-13 1:59 ` Dong, Chuanxiao
2011-04-13 5:44 ` Andrei Warkentin
2011-04-15 21:34 ` Cyril Hrubis
2011-08-10 13:30 ` Chris Ball
2011-04-11 21:13 ` [patchv3 3/4] MMC: Allow setting CMD timeout for CMD6 (SWITCH) Andrei Warkentin
2011-04-11 21:13 ` [patchv3 4/4] MMC: MMC boot partitions support Andrei Warkentin
2011-04-11 22:00 ` Chris Ball
2011-04-11 22:10 ` Andrei Warkentin
2011-04-11 22:22 ` Chris Ball
2011-04-11 22:18 ` Andrei Warkentin
2011-04-11 23:10 ` [patchv4 1/2] MMC: block.c cleanup for host claim/release Andrei Warkentin
2011-04-11 23:10 ` [patchv4 2/2] MMC: MMC boot partitions support Andrei Warkentin
2011-04-11 23:20 ` [patchv3 4/4] " Chris Ball
2011-04-11 23:24 ` Andrei Warkentin
2011-04-21 1:13 ` Chris Ball
2011-04-21 1:30 ` Chris Ball
2011-04-21 5:09 ` Philip Rakity
2011-04-21 5:22 ` Chris Ball
2011-04-21 5:31 ` Andrei Warkentin
2011-04-21 6:07 ` [RFC] MMC: Block: Ensure hardware partitions don't mess with mmcblk device naming Andrei Warkentin
2011-04-21 8:17 ` Andrei Warkentin
2011-04-21 14:44 ` Chris Ball
2011-04-22 0:20 ` Chris Ball
2011-04-22 3:46 ` [PATCH] " Andrei Warkentin
2011-04-22 3:50 ` Andrei Warkentin
2011-04-22 22:34 ` Chris Ball
2011-04-21 4:31 ` [patchv3 4/4] MMC: MMC boot partitions support Jaehoon Chung
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