Joe Thornber [Mon, 15 Aug 2011 01:42:47 +0000 (11:42 +1000)]
Initial EXPERIMENTAL implementation of device-mapper thin provisioning
with snapshot support. The 'thin' target is used to create instances of
the virtual devices that are hosted in the 'thin-pool' target. The
thin-pool target provides data sharing among devices. This sharing is
made possible using the persistent-data library in the previous patch.
The main highlight of this implementation, compared to the previous
implementation of snapshots, is that it allows many virtual devices to
be stored on the same data volume, simplifying administration and
allowing sharing of data between volumes (thus reducing disk usage).
Another big feature is support for arbitrary depth of recursive
snapshots (snapshots of snapshots of snapshots ...). The previous
implementation of snapshots did this by chaining together lookup tables,
and so performance was O(depth). This new implementation uses a single
data structure so we don't get this degradation with depth.
For further information and examples of how to use this, please read
Documentation/device-mapper/thin-provisioning.txt
Signed-off-by: Joe Thornber <thornber@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Theodore Ts'o [Sun, 14 Aug 2011 23:01:05 +0000 (19:01 -0400)]
ext4: fake direct I/O mode for data=journal
Currently attempts to open a file with O_DIRECT in data=journal mode
causes the open to fail with -EINVAL. This makes it very hard to test
data=journal mode. So we will let the open succeed, but then always
fall back to O_DSYNC buffered writes.
Clemens Ladisch [Tue, 21 Jun 2011 20:09:50 +0000 (22:09 +0200)]
mm: fix wrong vmap address calculations with odd NR_CPUS values
Commit db64fe02258f ("mm: rewrite vmap layer") introduced code that does
address calculations under the assumption that VMAP_BLOCK_SIZE is a
power of two. However, this might not be true if CONFIG_NR_CPUS is not
set to a power of two.
Wrong vmap_block index/offset values could lead to memory corruption.
However, this has never been observed in practice (or never been
diagnosed correctly); what caught this was the BUG_ON in vb_alloc() that
checks for inconsistent vmap_block indices.
To fix this, ensure that VMAP_BLOCK_SIZE always is a power of two.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=31572 Reported-by: Pavel Kysilka <goldenfish@linuxsoft.cz> Reported-by: Matias A. Fonzo <selk@dragora.org> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Nick Piggin <npiggin@suse.de> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: 2.6.28+ <stable@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Daniel Mack [Sun, 14 Aug 2011 09:31:16 +0000 (11:31 +0200)]
ALSA: snd_usb_caiaq: track submitted output urbs
The snd_usb_caiaq driver currently assumes that output urbs are serviced
in time and doesn't track when and whether they are given back by the
USB core. That usually works fine, but due to temporary limitations of
the XHCI stack, we faced that urbs were submitted more than once with
this approach.
As it's no good practice to fire and forget urbs anyway, this patch
introduces a proper bit mask to track which requests have been submitted
and given back.
That alone however doesn't make the driver work in case the host
controller is broken and doesn't give back urbs at all, and the output
stream will stop once all pre-allocated output urbs are consumed. But
it does prevent crashes of the controller stack in such cases.
See http://bugzilla.kernel.org/show_bug.cgi?id=40702 for more details.
Signed-off-by: Daniel Mack <zonque@gmail.com> Reported-and-tested-by: Matej Laitl <matej@laitl.cz> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de>
ASoC: rx1950: Fix compilation error due to missing header
Add linux/types.h to fix this compilation error:
In file included from arch/arm/mach-s3c2410/include/mach/gpio-fns.h:27:0,
from arch/arm/mach-s3c2410/include/mach/gpio.h:27,
from /home/anarsoul/work/pda-linux/linux-next/arch/arm/include/asm/gpio.h:5,
from include/linux/gpio.h:18,
from sound/soc/samsung/rx1950_uda1380.c:20:
arch/arm/plat-samsung/include/plat/gpio-cfg.h:29:34: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:30:34: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s5p_gpio_drvstr_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:57:2: error: expected specifier-qualifier-list before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:148:47: error: expected declaration specifiers or ‘...’ before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:156:24: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s3c_gpio_getpull’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:175:24: error: expected declaration specifiers or ‘...’ before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h: In function ‘s3c_gpio_cfgrange_nopull’:
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: error: ‘s3c_gpio_pull_t’ undeclared (first use in this function)
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: note: each undeclared identifier is reported only once for each function it appears in
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: error: expected ‘)’ before numeric constant
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: error: too many arguments to function ‘s3c_gpio_cfgall_range’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:174:12: note: declared here
arch/arm/plat-samsung/include/plat/gpio-cfg.h: At top level:
arch/arm/plat-samsung/include/plat/gpio-cfg.h:199:26: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s5p_gpio_get_drvstr’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:210:50: error: expected declaration specifiers or ‘...’ before ‘s5p_gpio_drvstr_t’
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
ASoC: h1940: Fix compilation error due to missing header
Add linux/types.h to fix this compilation error:
In file included from arch/arm/mach-s3c2410/include/mach/gpio-fns.h:27:0,
from arch/arm/mach-s3c2410/include/mach/gpio.h:27,
from /home/anarsoul/work/pda-linux/linux-next/arch/arm/include/asm/gpio.h:5,
from include/linux/gpio.h:18,
from sound/soc/samsung/rx1950_uda1380.c:20:
arch/arm/plat-samsung/include/plat/gpio-cfg.h:29:34: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:30:34: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s5p_gpio_drvstr_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:57:2: error: expected specifier-qualifier-list before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:148:47: error: expected declaration specifiers or ‘...’ before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:156:24: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s3c_gpio_getpull’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:175:24: error: expected declaration specifiers or ‘...’ before ‘s3c_gpio_pull_t’
arch/arm/plat-samsung/include/plat/gpio-cfg.h: In function ‘s3c_gpio_cfgrange_nopull’:
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: error: ‘s3c_gpio_pull_t’ undeclared (first use in this function)
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: note: each undeclared identifier is reported only once for each function it appears in
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: error: expected ‘)’ before numeric constant
arch/arm/plat-samsung/include/plat/gpio-cfg.h:180:47: error: too many arguments to function ‘s3c_gpio_cfgall_range’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:174:12: note: declared here
arch/arm/plat-samsung/include/plat/gpio-cfg.h: At top level:
arch/arm/plat-samsung/include/plat/gpio-cfg.h:199:26: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘s5p_gpio_get_drvstr’
arch/arm/plat-samsung/include/plat/gpio-cfg.h:210:50: error: expected declaration specifiers or ‘...’ before ‘s5p_gpio_drvstr_t’
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Mark Brown [Sat, 13 Aug 2011 02:50:48 +0000 (11:50 +0900)]
ASoC: Support !CONFIG_REGMAP builds
Since we changed regmap to be selected and register per bus rather than
via the core only we can't rely on it being enabled by the ASoC core.
Support compiling it out.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Reported-by: Axel Lin <axel.lin@gmail.com>
Mark Brown [Wed, 10 Aug 2011 08:47:33 +0000 (17:47 +0900)]
ASoC: Disable WM8994 VMID for digital only paths
On WM8994 class devices only the analogue portions of the CODEC require
VMID so when running digital only paths we can leave VMID disabled.
On some earlier devices the FLL uses VMID so we don't use DAPM reference
counting alone, we maintain an internal reference count which is also
enabled and disabled by the FLL startup.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
Mark Brown [Fri, 15 Jul 2011 06:12:31 +0000 (15:12 +0900)]
ASoC: Add VMID widget for wm_hubs devices
Currently this does not actually do anything, it is being introduced in
order to facilitate additional power optimisations for current generation
devices.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
Theodore Ts'o [Sun, 14 Aug 2011 02:43:25 +0000 (22:43 -0400)]
ext4: don't give the "disabling delalloc" if not explicitly specified
If both delalloc and data=journalled are enabled, then a warning
message that delalloc will be disabled is displayed at mount time.
Since delalloc is the default, this means this warning is always
printed which really isn't necessary. So disable the warning message
unless the user explicitly asked for delalloc.
Theodore Ts'o [Sun, 14 Aug 2011 02:16:38 +0000 (22:16 -0400)]
ext2,ext3,ext4: don't inherit APPEND_FL or IMMUTABLE_FL for new inodes
This doesn't make much sense, and it exposes a bug in the kernel where
attempts to create a new file in an append-only directory using
O_CREAT will fail (but still leave a zero-length file). This was
discovered when xfstests #79 was generalized so it could run on all
file systems.
Randy Dunlap [Sat, 13 Aug 2011 19:34:52 +0000 (12:34 -0700)]
Documentation: kernel-parameters.txt cleanups
General cleanups to kernel-parameters.txt:
- add missing $ARCH that are being used/referenced
- alphabetize the parameter restrictions list
- spell "IA-64" as listed in arch/ia64/Kconfig instead of "IA64"
- remove trailing whitespace
- use hyphen in 32-bit etc.
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Stephen Boyd [Sat, 13 Aug 2011 19:34:50 +0000 (12:34 -0700)]
Documentation: add ARM user_debug to kernel-parameters.txt
Usually kernel parameters are documented in kernel-parameters.txt
but user_debug is only documented in the Kconfig. Document the
option and point to the Kconfig help text for more info.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation: drop Linux Source Driver from kernel-docs references
Dropping LSD (Linux Source Driver) since it hasn't been available
for a long time.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / karo-tx-linux.git / log