The current code might result in trying to remap 512MB video ram on
a 32 bit system which is quite likely to fail.
This patch tries to map less of it down to 8MB as this should still
be enough to get a reasonably well working framebuffer. This should
make viafb work for many people without requiring them to manually
allocate more space.
This patch adds a config option to be compatible with X servers like
OpenChrome. This is required as for example the X server does not
handle things like disabled IGAs/PLLs resulting in a potential
freeze on X startup. With this option disabled we can provide some
nice features like power management and not reinitializing the
hardware on every mode switch (taking long time, causing flickering).
When allowing some PLL calculation we get a frequency that seems to
be a bit higher than what the OLPC DCON likes resulting in a still
readable but not so good image. We don't really know whether this is
a problem with the calculation formula or the OLPC but as other
displays seem to be happy with the other modes adjusting the OLPC
refresh looks like the better thing. This patch prevents a
regression when dynamic PLL calculation is allowed.
This patch fixes the devices connected on OLPC. The OLPC panel seems
to be connected to DVP1 and LVDS2 for some reasons and if not both
are handled correct the display does not work correct or not at all.
This patch prevents regressions on the OLPC where it worked by
accident but would break in future as the driver did not know the
correct devices connected. This might also fix hardware scaling.
Hopefully the OLPC is the only device with such a requirement but it
will be certainly better to actually know what devices are actually
connected and to not work by accident.
This patch fixes a regression introduced by fd3cc69848b7e1873e5f12bbcdd572b20277ecf3a
"viafb: remove duplicated clock storage"
caused by an incosistent mode which pretended to have a higher
refresh rate than it actually had. The wrong refresh rate resulted
in a calculated higher pixclock which the OLPC DCON could not handle.
By reducing the refresh rate to 50Hz we get close to the old
pixclock which makes the OLPC display usable again.
Minor other adjustments are needed as 60Hz is assumed to be a safe
value which is not true for OLPC DCON. This is no problem as we only
support 1200x900 on the OLPC.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Reported-by: Daniel Drake <dsd@laptop.org>
We do not need viafb_second{,_virtual}_{xres,yres} outside of
viafbdev.c so move them there and eliminate the virtual ones where
the only sane usage is done during initalization.
This patch introduces dummy functions to execute when we don't know
what we should do (due to missing documentation). They do nothing
but print a nice message in the log explaining the situation.
To trigger this message initial power management support is
activated which might save a bit energy by disabling PLL and clock
if no device is configured to use them.
Note: The message is only shown for the oldest IGPs CLE266 and K400
as for the other platforms there are reasonable assumptions
how it does (hopefully) work.
This patch is a huge move operation with some rename and introduces
an interface to still use the functions. This should be a step in
the right direction to reuse the code whenever possible but cleanly
separate code that differs on different platform and keeping the
complexity as low as possible.
pll_config was renamed to via_pll_config to keep the naming scheme.
This patch adds functions to enable/disable the display clocks.
It also fixes a tiny bug that slipped in with a previous commit but
could not yet have caused any problems.
viafb: add clock source selection and PLL power management support
This patch adds some support for clock source selection as well as
PLL power management. The code is unused at the moment but was
successfully tested as far as possible.
The implementation is according to the documentation for VX700,
VX800, VX855, VX900. Probably the source selection works like this
starting with K800 and the power managemennt at least since VX700.
(guessed based on the initialization in viamode.c)
This patch removes the max_hres and max_vres which are not used at
the moment. In general they could be useful but it would be better
to get them via any standard EDID implementation and not the buggy
incomplete one currently used which is also removed as far as
possible.
This patch allows calculating the pll multiplier within limits based
on the previous table. All available information supports that it
should be possible/sane to choose the multiplier free within some
ranges.
Storing the multiplier ranges instead of lots of pll configurations
reduces the memory needed and may as well improve the performance.
It is also expected to provide better pll values resulting in better
frequencies for the connected devices.
This patch initializes the margins for the initial mode correct.
This is required to get the desired initial refresh rate. Also do
more verbose sanity checking to prevent misbehavior.
This patch fixes multiple issues with the handling of refresh rates
especially for multi-display setups. If you experienced problems
with wrong refresh rates this patch might fix them.
This patch splits the pll configs up on pll versions. This allows
easy adding of other known good pll values. Additionally it made it
possible to remove invalid configurations resulting in better
behaviour for such cases. The resulting clocks are no longer stored
resulting in some computing overhead on each mode change.
The clocks can be easily recalculated by the timing and refresh value.
This brings us one step closer to removing VIAs modetable and use
generic ones and being easier extensible.
Before this patch only clocks that perfectly match were used and if
none existed this was not handled properly. This patch changes this
to always use the closest clock supported. This should behave like
before for clocks that have a perfect match but be much saner for
clocks which are slightly off.
This patch removes the direct lookup table for resolution+refresh and
pixclock by calculating this information from the mode table. Removes a
lot of dupllication and error potential by just doing a little more
calculations on each mode change.
These parameters are the same for all currently known VIA IGPs so it
does not make any sense to store them with IGP specific data. This
saves a few bytes and helps a bit in dicovering the real differences.
This patch removes all internal uses of another mostly artificial
value. It does duplicate the information of the maximum resolution and
it is not flexible as only a few resolutions exist. Hence it is better
to remove it and clean the mess up.
No runtime change expected.
This driver is not respecting the iomem memory space restrictions
and does direct access. This works on x86 but is non-portable and
should not be done. Converted memcpy() of 2 to readw.
Last post increment of romptr was unnecessary since pointer never
used after that.
Found by sparse, compile tested only.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Peter Huewe [Tue, 25 Jan 2011 21:34:24 +0000 (22:34 +0100)]
video/via: drop deprecated (and unused) i2c_adapter.id
This patch removes an assignment to the deprecated i2c_adapter.id
field. Since the field isn't used anywhere else in the driver it is
save to remove it.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
"TPM is working for me so I can log into employer's network in 2.6.37.
It broke when I tried 2.6.38-rc6, with the following relevant lines
from my dmesg:
This caused me to get suspicious, especially since the _other_ TPM
commit in 2.6.38 had already been reverted, so I tried reverting
commit c4ff4b829e: "TPM: Long default timeout fix". With this commit
reverted, my TPM on my Lenovo T410 is once again working."
Several ACPI drivers fail to build if CONFIG_NET is unset, because
they refer to things depending on CONFIG_THERMAL that in turn depends
on CONFIG_NET. However, CONFIG_THERMAL doesn't really need to depend
on CONFIG_NET, because the only part of it requiring CONFIG_NET is
the netlink interface in thermal_sys.c.
Put the netlink interface in thermal_sys.c under #ifdef CONFIG_NET
and remove the dependency of CONFIG_THERMAL on CONFIG_NET from
drivers/thermal/Kconfig.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Len Brown <lenb@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Luming Yu <luming.yu@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Tue, 1 Mar 2011 01:58:09 +0000 (17:58 -0800)]
Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm: fix unsigned vs signed comparison issue in modeset ctl ioctl.
drm/nv50-nvc0: make sure vma is definitely unmapped when destroying bo
Linus Torvalds [Tue, 1 Mar 2011 01:55:08 +0000 (17:55 -0800)]
Merge branches 'perf-fixes-for-linus', 'x86-fixes-for-linus' and 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf timechart: Fix max number of cpus
perf timechart: Fix black idle boxes in the title
perf hists: Print number of samples, not the period sum
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Use u32 instead of long to set reset vector back to 0
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
clockevents: Prevent oneshot mode when broadcast device is periodic
Linus Torvalds [Tue, 1 Mar 2011 01:53:04 +0000 (17:53 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: fix truncate after open
fuse: fix hang of single threaded fuseblk filesystem
Linus Torvalds [Tue, 1 Mar 2011 01:52:47 +0000 (17:52 -0800)]
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2: Check heartbeat mode for kernel stacks only
Ocfs2/refcounttree: Fix a bug for refcounttree to writeback clusters in a right number.
ocfs2: Fix estimate of necessary credits for mkdir
Linus Torvalds [Tue, 1 Mar 2011 01:47:09 +0000 (17:47 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
eukrea-tlv320: fix platform_name
ASoC: correct pxa AC97 DAI names
ALSA: hda - Add support for new IDT 92HD98 and 92HD99 codecs
ALSA: HDA: Add ideapad quirk for two Dell machines
ALSA: HDA: Add a new Conexant codec 506e (20590)
ALSA: usb-audio: fix oops due to cleanup race when disconnecting
ASoC: Hook wm_hubs micbiases up to CLK_SYS
ASoC: Correct definition of WM8903_VMID_RES_5K
ASoC: Fix WM8958 default microphone detection argument ordering
ALSA: HDA: Fix mic initialization in VIA auto parser
ALSA: fix one memory leak in sound jack
Ben Hutchings [Sun, 27 Feb 2011 05:41:35 +0000 (05:41 +0000)]
mm: <asm-generic/pgtable.h> must include <linux/mm_types.h>
Commit e2cda3226481 ("thp: add pmd mangling generic functions") replaced
some macros in <asm-generic/pgtable.h> with inline functions.
If the functions are to be defined (not all architectures need them)
then struct vm_area_struct must be defined first. So include
<linux/mm_types.h>.
Fixes a build failure seen in Debian:
CC [M] drivers/media/dvb/mantis/mantis_pci.o
In file included from arch/arm/include/asm/pgtable.h:460,
from drivers/media/dvb/mantis/mantis_pci.c:25:
include/asm-generic/pgtable.h: In function 'ptep_test_and_clear_young':
include/asm-generic/pgtable.h:29: error: dereferencing pointer to incomplete type
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Don Zickus [Tue, 8 Feb 2011 04:25:00 +0000 (23:25 -0500)]
x86: Use u32 instead of long to set reset vector back to 0
A customer of ours, complained that when setting the reset
vector back to 0, it trashed other data and hung their box.
They noticed when only 4 bytes were set to 0 instead of 8,
everything worked correctly.
Mathew pointed out:
|
| We're supposed to be resetting trampoline_phys_low and
| trampoline_phys_high here, which are two 16-bit values.
| Writing 64 bits is definitely going to overwrite space
| that we're not supposed to be touching.
|
So limit the area modified to u32.
Signed-off-by: Don Zickus <dzickus@redhat.com> Acked-by: Matthew Garrett <mjg@redhat.com> Cc: <stable@kernel.org>
LKML-Reference: <1297139100-424-1-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Thomas Renninger [Sun, 27 Feb 2011 21:36:46 +0000 (22:36 +0100)]
perf timechart: Fix max number of cpus
Currently numcpus is determined in pid_put_sample which is only
called on sched_switch/sched_wakeup sample processing.
On a machine with a lot cpus I often saw the last cpu missing.
Check for (max) numcpus on every event happening and in the
beginning. -> fixes the issue for me.
Signed-off-by: Thomas Renninger <trenn@suse.de> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: lenb@kernel.org
LKML-Reference: <1298842606-55712-6-git-send-email-trenn@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Thomas Renninger [Sun, 27 Feb 2011 21:36:45 +0000 (22:36 +0100)]
perf timechart: Fix black idle boxes in the title
This fix is needed for eye of gnome and firefox svg viewers.
Only Inkscape can handle the broken case.
Compare with the other svg_legenda_box declarations, looks
like a typo slipped in at this place.
Signed-off-by: Thomas Renninger <trenn@suse.de> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: lenb@kernel.org
LKML-Reference: <1298842606-55712-5-git-send-email-trenn@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ben Skeggs [Mon, 28 Feb 2011 04:22:12 +0000 (14:22 +1000)]
drm/nv50-nvc0: make sure vma is definitely unmapped when destroying bo
Somehow fixes a misrendering + hang at GDM startup on my NVA8...
My first guess would have been stale TLB entries laying around that a new
bo then accidentally inherits. That doesn't make a great deal of sense
however, as when we mapped the pages for the new bo the TLBs would've
gotten flushed anyway.
Thomas Gleixner [Fri, 25 Feb 2011 21:34:23 +0000 (22:34 +0100)]
clockevents: Prevent oneshot mode when broadcast device is periodic
When the per cpu timer is marked CLOCK_EVT_FEAT_C3STOP, then we only
can switch into oneshot mode, when the backup broadcast device
supports oneshot mode as well. Otherwise we would try to switch the
broadcast device into an unsupported mode unconditionally. This went
unnoticed so far as the current available broadcast devices support
oneshot mode. Seth unearthed this problem while debugging and working
around an hpet related BIOS wreckage.
Add the necessary check to tick_is_oneshot_available().
Linus Torvalds [Fri, 25 Feb 2011 23:15:17 +0000 (15:15 -0800)]
Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
PM: Make ACPI wakeup from S5 work again when CONFIG_PM_SLEEP is unset
Hugh Dickins [Fri, 25 Feb 2011 22:44:29 +0000 (14:44 -0800)]
memcg: more mem_cgroup_uncharge() batching
It seems odd that truncate_inode_pages_range(), called not only when
truncating but also when evicting inodes, has mem_cgroup_uncharge_start
and _end() batching in its second loop to clear up a few leftovers, but
not in its first loop that does almost all the work: add them there too.
Jan Kara [Fri, 25 Feb 2011 22:44:27 +0000 (14:44 -0800)]
aio: fix race between io_destroy() and io_submit()
A race can occur when io_submit() races with io_destroy():
CPU1 CPU2
io_submit()
do_io_submit()
...
ctx = lookup_ioctx(ctx_id);
io_destroy()
Now do_io_submit() holds the last reference to ctx.
...
queue new AIO
put_ioctx(ctx) - frees ctx with active AIOs
We solve this issue by checking whether ctx is being destroyed in AIO
submission path after adding new AIO to ctx. Then we are guaranteed that
either io_destroy() waits for new AIO or we see that ctx is being
destroyed and bail out.
Cc: Nick Piggin <npiggin@kernel.dk> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Nick Piggin [Fri, 25 Feb 2011 22:44:26 +0000 (14:44 -0800)]
aio: fix rcu ioctx lookup
aio-dio-invalidate-failure GPFs in aio_put_req from io_submit.
lookup_ioctx doesn't implement the rcu lookup pattern properly.
rcu_read_lock does not prevent refcount going to zero, so we might take
a refcount on a zero count ioctx.
Fix the bug by atomically testing for zero refcount before incrementing.
[jack@suse.cz: added comment into the code] Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Lei Xu [Fri, 25 Feb 2011 22:44:23 +0000 (14:44 -0800)]
drivers/rtc/rtc-ds3232.c: fix time range difference between linux and RTC chip
In linux rtc_time struct, tm_mon range is 0~11, tm_wday range is 0~6,
while in RTC HW REG, month range is 1~12, day of the week range is 1~7,
this patch adjusts difference of them.
The efect of this bug was that most of month will be operated on as the
next month by the hardware (When in Jan it maybe even worse). For
example, if in May, software wrote 4 to the hardware, which handled it as
April. Then the logic would be different between software and hardware,
which would cause weird things to happen.
Signed-off-by: Lei Xu <B33228@freescale.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: john stultz <johnstul@us.ibm.com> Cc: Jack Lan <jack.lan@freescale.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Timo Warns [Fri, 25 Feb 2011 22:44:21 +0000 (14:44 -0800)]
ldm: corrupted partition table can cause kernel oops
The kernel automatically evaluates partition tables of storage devices.
The code for evaluating LDM partitions (in fs/partitions/ldm.c) contains
a bug that causes a kernel oops on certain corrupted LDM partitions. A
kernel subsystem seems to crash, because, after the oops, the kernel no
longer recognizes newly connected storage devices.
The patch changes ldm_parse_vmdb() to Validate the value of vblk_size.
Signed-off-by: Timo Warns <warns@pre-sense.de> Cc: Eugene Teo <eugeneteo@kernel.sg> Acked-by: Richard Russon <ldm@flatcap.org> Cc: Harvey Harrison <harvey.harrison@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mel Gorman [Fri, 25 Feb 2011 22:44:20 +0000 (14:44 -0800)]
mm: vmscan: stop reclaim/compaction earlier due to insufficient progress if !__GFP_REPEAT
should_continue_reclaim() for reclaim/compaction allows scanning to
continue even if pages are not being reclaimed until the full list is
scanned. In terms of allocation success, this makes sense but potentially
it introduces unwanted latency for high-order allocations such as
transparent hugepages and network jumbo frames that would prefer to fail
the allocation attempt and fallback to order-0 pages. Worse, there is a
potential that the full LRU scan will clear all the young bits, distort
page aging information and potentially push pages into swap that would
have otherwise remained resident.
This patch will stop reclaim/compaction if no pages were reclaimed in the
last SWAP_CLUSTER_MAX pages that were considered. For allocations such as
hugetlbfs that use __GFP_REPEAT and have fewer fallback options, the full
LRU list may still be scanned.
Order-0 allocation should not be affected because RECLAIM_MODE_COMPACTION
is not set so the following avoids the gfp_mask being examined:
if (!(sc->reclaim_mode & RECLAIM_MODE_COMPACTION))
return false;
A tool was developed based on ftrace that tracked the latency of
high-order allocations while transparent hugepage support was enabled and
three benchmarks were run. The "fix-infinite" figures are 2.6.38-rc4 with
Johannes's patch "vmscan: fix zone shrinking exit when scan work is done"
applied.
STREAM Highorder Allocation Latency Statistics
fix-infinite break-early
1 :: Count 10298 10229
1 :: Min 0.4560 0.4640
1 :: Mean 1.0589 1.0183
1 :: Max 14.5990 11.7510
1 :: Stddev 0.5208 0.4719
2 :: Count 2 1
2 :: Min 1.8610 3.7240
2 :: Mean 3.4325 3.7240
2 :: Max 5.0040 3.7240
2 :: Stddev 1.5715 0.0000
9 :: Count 111696 111694
9 :: Min 0.5230 0.4110
9 :: Mean 10.5831 10.5718
9 :: Max 38.4480 43.2900
9 :: Stddev 1.1147 1.1325
Mean time for order-1 allocations is reduced. order-2 looks increased but
with so few allocations, it's not particularly significant. THP mean
allocation latency is also reduced. That said, allocation time varies so
significantly that the reductions are within noise.
Max allocation time is reduced by a significant amount for low-order
allocations but reduced for THP allocations which presumably are now
breaking before reclaim has done enough work.
SysBench Highorder Allocation Latency Statistics
fix-infinite break-early
1 :: Count 15745 15677
1 :: Min 0.4250 0.4550
1 :: Mean 1.1023 1.0810
1 :: Max 14.4590 10.8220
1 :: Stddev 0.5117 0.5100
2 :: Count 1 1
2 :: Min 3.0040 2.1530
2 :: Mean 3.0040 2.1530
2 :: Max 3.0040 2.1530
2 :: Stddev 0.0000 0.0000
9 :: Count 2017 1931
9 :: Min 0.4980 0.7480
9 :: Mean 10.4717 10.3840
9 :: Max 24.9460 26.2500
9 :: Stddev 1.1726 1.1966
Again, mean time for order-1 allocations is reduced while order-2
allocations are too few to draw conclusions from. The mean time for THP
allocations is also slightly reduced albeit the reductions are within
varianes.
Once again, our maximum allocation time is significantly reduced for
low-order allocations and slightly increased for THP allocations.
Anon stream mmap reference Highorder Allocation Latency Statistics
1 :: Count 1376 1790
1 :: Min 0.4940 0.5010
1 :: Mean 1.0289 0.9732
1 :: Max 6.2670 4.2540
1 :: Stddev 0.4142 0.2785
2 :: Count 1 -
2 :: Min 1.9060 -
2 :: Mean 1.9060 -
2 :: Max 1.9060 -
2 :: Stddev 0.0000 -
9 :: Count 11266 11257
9 :: Min 0.4990 0.4940
9 :: Mean 27250.4669 24256.1919
9 :: Max 11439211.0000 6008885.0000
9 :: Stddev 226427.4624 186298.1430
This benchmark creates one thread per CPU which references an amount of
anonymous memory 1.5 times the size of physical RAM. This pounds swap
quite heavily and is intended to exercise THP a bit.
Mean allocation time for order-1 is reduced as before. It's also reduced
for THP allocations but the variations here are pretty massive due to
swap. As before, maximum allocation times are significantly reduced.
Overall, the patch reduces the mean and maximum allocation latencies for
the smaller high-order allocations. This was with Slab configured so it
would be expected to be more significant with Slub which uses these size
allocations more aggressively.
The mean allocation times for THP allocations are also slightly reduced.
The maximum latency was slightly increased as predicted by the comments
due to reclaim/compaction breaking early. However, workloads care more
about the latency of lower-order allocations than THP so it's an
acceptable trade-off.
Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The regulator framework is used for power management. The regulators are
only named in the driver code, the actual control stuff is in the board
file for each architecture or use case.
The PN544 chip has three regulators that can be controlled or not -
depending on the architecture where the chip is being used. So some of
the regulators may not be controllable. In our current case the third
regulator, which was missing from the code, went unnoticed because we
didn't need to control it. To be as general as possible - in this respect
- the driver needs to list all regulators. Then the board file can be
used to actually set the usage.
Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/nfc/Kconfig: use full form of the NFC acronym
Spell out the NFC acronym when it's shown for the first time.
Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Davide Libenzi [Fri, 25 Feb 2011 22:44:12 +0000 (14:44 -0800)]
epoll: prevent creating circular epoll structures
In several places, an epoll fd can call another file's ->f_op->poll()
method with ep->mtx held. This is in general unsafe, because that other
file could itself be an epoll fd that contains the original epoll fd.
The code defends against this possibility in its own ->poll() method using
ep_call_nested, but there are several other unsafe calls to ->poll
elsewhere that can be made to deadlock. For example, the following simple
program causes the call in ep_insert recursively call the original fd's
->poll, leading to deadlock:
#include <unistd.h>
#include <sys/epoll.h>
int main(void) {
int e1, e2, p[2];
struct epoll_event evt = {
.events = EPOLLIN
};
On insertion, check whether the inserted file is itself a struct epoll,
and if so, do a recursive walk to detect whether inserting this file would
create a loop of epoll structures, which could lead to deadlock.
[nelhage@ksplice.com: Use epmutex to serialize concurrent inserts] Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: Nelson Elhage <nelhage@ksplice.com> Reported-by: Nelson Elhage <nelhage@ksplice.com> Tested-by: Nelson Elhage <nelhage@ksplice.com> Cc: <stable@kernel.org> [2.6.34+, possibly earlier] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 25 Feb 2011 22:04:44 +0000 (14:04 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
regulator, mc13xxx: Remove pointless test for unsigned less than zero
regulator: Fix warning with CONFIG_BUG disabled
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: fix fiemap bugs with delalloc
Btrfs: set FMODE_EXCL in btrfs_device->mode
Btrfs: make btrfs_rm_device() fail gracefully
Btrfs: Avoid accessing unmapped kernel address
Btrfs: Fix BTRFS_IOC_SUBVOL_SETFLAGS ioctl
Btrfs: allow balance to explicitly allocate chunks as it relocates
Btrfs: put ENOSPC debugging under a mount option
Linus Torvalds [Fri, 25 Feb 2011 22:02:33 +0000 (14:02 -0800)]
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86 quirk: Fix polarity for IRQ0 pin2 override on SB800 systems
x86/mrst: Fix apb timer rating when lapic timer is used
x86: Fix reboot problem on VersaLogic Menlow boards
CPU0 and CPU1 clockdomain is at the offset of 0x18 from the LPRM base.
The header file has set it wrongly to 0x0. Offset 0x0 is for CPUx power
domain control register
Fix the same.
The autogen scripts is fixed thanks to Benoit Cousson
With the old value, the clockdomain code would access the
*_PWRSTCTRL.POWERSTATE field when it thought it was accessing the
*_CLKSTCTRL.CLKTRCTRL field. In the worst case, this could cause
system power management to behave incorrectly.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Benoit Cousson <b-cousson@ti.com>
[paul@pwsan.com: added second paragraph to commit message] Signed-off-by: Paul Walmsley <paul@pwsan.com>
Linus Torvalds [Fri, 25 Feb 2011 19:14:44 +0000 (11:14 -0800)]
Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
usb: musb: core: set has_tt flag
USB: xhci: mark local functions as static
USB: xhci: fix couple sparse annotations
USB: xhci: rework xhci_print_ir_set() to get ir set from xhci itself
USB: Reset USB 3.0 devices on (re)discovery
xhci: Fix an error in count_sg_trbs_needed()
xhci: Fix errors in the running total calculations in the TRB math
xhci: Clarify some expressions in the TRB math
xhci: Avoid BUG() in interrupt context
Linus Torvalds [Fri, 25 Feb 2011 19:13:26 +0000 (11:13 -0800)]
Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md:
md: Fix - again - partition detection when array becomes active
Fix over-zealous flush_disk when changing device size.
md: avoid spinlock problem in blk_throtl_exit
md: correctly handle probe of an 'mdp' device.
md: don't set_capacity before array is active.
md: Fix raid1->raid0 takeover
Miklos Szeredi [Fri, 25 Feb 2011 13:44:58 +0000 (14:44 +0100)]
fuse: fix truncate after open
Commit e1181ee6 "vfs: pass struct file to do_truncate on O_TRUNC
opens" broke the behavior of open(O_TRUNC|O_RDONLY) in fuse. Fuse
assumed that when called from open, a truncate() will be done, not an
ftruncate().
Fix by restoring the old behavior, based on the ATTR_OPEN flag.
Signed-off-by: Eric Bénard <eric@eukrea.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@kernel.org
Jesper Juhl [Wed, 23 Feb 2011 22:45:55 +0000 (23:45 +0100)]
regulator, mc13xxx: Remove pointless test for unsigned less than zero
The variable 'val' is a 'unsigned int', so it can never be less than zero.
This fact makes the "val < 0" part of the test done in BUG_ON() in
mc13xxx_regulator_get_voltage() rather pointles since it can never have
any effect.
This patch removes the pointless test.
Signed-off-by: Jesper Juhl <jj@chaosbits.net> Acked-by: Alberto Panizzo <maramaopercheseimorto@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Linus Torvalds [Fri, 25 Feb 2011 01:08:48 +0000 (17:08 -0800)]
Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/i915: Fix unintended recursion in ironlake_disable_rc6
drm/i915: fix corruptions on i8xx due to relaxed fencing
drm/i915: skip FDI & PCH enabling for DP_A
agp/intel: Experiment with a 855GM GWB bit
drm/i915: don't enable FDI & transcoder interrupts after all
drm/i915: Ignore a hung GPU when flushing the framebuffer prior to a switch
Paul Walmsley [Wed, 23 Feb 2011 02:59:49 +0000 (19:59 -0700)]
OMAP2+: clocksource: fix crash on boot when !CONFIG_OMAP_32K_TIMER
OMAP2+ kernels built without CONFIG_OMAP_32K_TIMER crash on boot after the
2.6.38 sched_clock changes:
[ 0.000000] OMAP clockevent source: GPTIMER1 at 13000000 Hz
[ 0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 0.000000] pgd = c0004000
[ 0.000000] [00000000] *pgd=00000000
[ 0.000000] Internal error: Oops: 80000005 [#1] SMP
[ 0.000000] last sysfs file:
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 Not tainted (2.6.38-rc5-00057-g04aa67d #152)
[ 0.000000] PC is at 0x0
[ 0.000000] LR is at sched_clock_poll+0x2c/0x3c
Without CONFIG_OMAP_32K_TIMER, the kernel has an clockevent and
clocksource resolution about three orders of magnitude higher than
with CONFIG_OMAP_32K_TIMER set. The tradeoff is that the lowest
power consumption states are not available.
Fix by calling init_sched_clock() from the GPTIMER clocksource init code.
Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
projects / linux-beck.git / log