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When the dual-adc switching mode is active in Realtek auto-parser,
we need to couple all ADCs as a single capture-volume. Currently, the
volume control changes only the first ADC, thus others may remain silent.
This patch fixes the problem.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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vmxnet3 device supports only power-of-two number of queues. The driver
therefore needs to check this and rounds down the number of queues to the
nearest power of two.
Signed-off-by: Yong Wang <yongwang@vmware.com>
Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com>
Reviewed-by: Dmitry Torokhov <dtor@vmware.com>
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Some BIOSes will reset the Intel MISC_ENABLE MSR (specifically the
XD_DISABLE bit) when resuming from S3, which can interact poorly with
ebba638ae723d8a8fc2f7abce5ec18b688b791d7. In 32bit PAE mode, this can
lead to a fault when EFER is restored by the kernel wakeup routines,
due to it setting the NX bit for a CPU that (thanks to the BIOS reset)
now incorrectly thinks it lacks the NX feature. (64bit is not affected
because it uses a common CPU bring-up that specifically handles the
XD_DISABLE bit.)
The need for MISC_ENABLE being restored so early is specific to the S3
resume path. Normally, MISC_ENABLE is saved in save_processor_state(),
but this happens after the resume header is created, so just reproduce
the logic here. (acpi_suspend_lowlevel() creates the header, calls
do_suspend_lowlevel, which calls save_processor_state(), so the saved
processor context isn't available during resume header creation.)
[ hpa: Consider for stable if OK in mainline ]
Signed-off-by: Kees Cook <kees.cook@canonical.com>
Link: http://lkml.kernel.org/r/20110707011034.GA8523@outflux.net
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: <stable@kernel.org> 2.6.38+
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* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6:
gpio: tps65910: add missing breaks in tps65910_gpio_init
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We need to make sure the data relocation inode doesn't go through
the delayed metadata updates, otherwise we get an oops during balance:
kernel BUG at fs/btrfs/relocation.c:4303!
[SNIP]
Call Trace:
[<ffffffffa03143fd>] ? update_ref_for_cow+0x22d/0x330 [btrfs]
[<ffffffffa0314951>] __btrfs_cow_block+0x451/0x5e0 [btrfs]
[<ffffffffa031355d>] ? read_block_for_search+0x14d/0x4d0 [btrfs]
[<ffffffffa0314beb>] btrfs_cow_block+0x10b/0x240 [btrfs]
[<ffffffffa031acae>] btrfs_search_slot+0x49e/0x7a0 [btrfs]
[<ffffffffa032d8af>] btrfs_lookup_inode+0x2f/0xa0 [btrfs]
[<ffffffff8147bf0e>] ? mutex_lock+0x1e/0x50
[<ffffffffa0380cf1>] btrfs_update_delayed_inode+0x71/0x160 [btrfs]
[<ffffffffa037ff27>] ? __btrfs_release_delayed_node+0x67/0x190 [btrfs]
[<ffffffffa0381cf8>] btrfs_run_delayed_items+0xe8/0x120 [btrfs]
[<ffffffffa03365e0>] btrfs_commit_transaction+0x250/0x850 [btrfs]
[<ffffffff810f91d9>] ? find_get_pages+0x39/0x130
[<ffffffffa0336cd5>] ? join_transaction+0x25/0x250 [btrfs]
[<ffffffff81081de0>] ? wake_up_bit+0x40/0x40
[<ffffffffa03785fa>] prepare_to_relocate+0xda/0xf0 [btrfs]
[<ffffffffa037f2bb>] relocate_block_group+0x4b/0x620 [btrfs]
[<ffffffffa0334cf5>] ? btrfs_clean_old_snapshots+0x35/0x150 [btrfs]
[<ffffffffa037fa43>] btrfs_relocate_block_group+0x1b3/0x2e0 [btrfs]
[<ffffffffa0368ec0>] ? btrfs_tree_unlock+0x50/0x50 [btrfs]
[<ffffffffa035e39b>] btrfs_relocate_chunk+0x8b/0x670 [btrfs]
[<ffffffffa031303d>] ? btrfs_set_path_blocking+0x3d/0x50 [btrfs]
[<ffffffffa03577d8>] ? read_extent_buffer+0xd8/0x1d0 [btrfs]
[<ffffffffa031bea1>] ? btrfs_previous_item+0xb1/0x150 [btrfs]
[<ffffffffa03577d8>] ? read_extent_buffer+0xd8/0x1d0 [btrfs]
[<ffffffffa035f5aa>] btrfs_balance+0x21a/0x2b0 [btrfs]
[<ffffffffa0368898>] btrfs_ioctl+0x798/0xd20 [btrfs]
[<ffffffff8111e358>] ? handle_mm_fault+0x148/0x270
[<ffffffff814809e8>] ? do_page_fault+0x1d8/0x4b0
[<ffffffff81160d6a>] do_vfs_ioctl+0x9a/0x540
[<ffffffff811612b1>] sys_ioctl+0xa1/0xb0
[<ffffffff81484ec2>] system_call_fastpath+0x16/0x1b
[SNIP]
RIP [<ffffffffa037c1cc>] btrfs_reloc_cow_block+0x22c/0x270 [btrfs]
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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A user reported an error where if we try to balance an fs after a device has
been removed it will blow up. This is because we get an EIO back and this is
where BUG_ON(ret) bites us in the ass. To fix we just exit. Thanks,
Reported-by: Anand Jain <Anand.Jain@oracle.com>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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There are three missed mount options settable by user which are not
currently displayed in mount output.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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When inodes are marked stale in a transaction, they are treated
specially when the inode log item is being inserted into the AIL.
It tries to avoid moving the log item forward in the AIL due to a
race condition with the writing the underlying buffer back to disk.
The was "fixed" in commit de25c18 ("xfs: avoid moving stale inodes
in the AIL").
To avoid moving the item forward, we return a LSN smaller than the
commit_lsn of the completing transaction, thereby trying to trick
the commit code into not moving the inode forward at all. I'm not
sure this ever worked as intended - it assumes the inode is already
in the AIL, but I don't think the returned LSN would have been small
enough to prevent moving the inode. It appears that the reason it
worked is that the lower LSN of the inodes meant they were inserted
into the AIL and flushed before the inode buffer (which was moved to
the commit_lsn of the transaction).
The big problem is that with delayed logging, the returning of the
different LSN means insertion takes the slow, non-bulk path. Worse
yet is that insertion is to a position -before- the commit_lsn so it
is doing a AIL traversal on every insertion, and has to walk over
all the items that have already been inserted into the AIL. It's
expensive.
To compound the matter further, with delayed logging inodes are
likely to go from clean to stale in a single checkpoint, which means
they aren't even in the AIL at all when we come across them at AIL
insertion time. Hence these were all getting inserted into the AIL
when they simply do not need to be as inodes marked XFS_ISTALE are
never written back.
Transactional/recovery integrity is maintained in this case by the
other items in the unlink transaction that were modified (e.g. the
AGI btree blocks) and committed in the same checkpoint.
So to fix this, simply unpin the stale inodes directly in
xfs_inode_item_committed() and return -1 to indicate that the AIL
insertion code does not need to do any further processing of these
inodes.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
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All the blkio.throttle.* file names are incorrectly reported without
".throttle" in the documentation. Fix it.
Signed-off-by: Andrea Righi <andrea@betterlinux.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The list of available general purpose memory allocators in
Documentation/CodingStyle chapter 14 is incomplete. This patch adds
the missing vzalloc() to the list.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Move location of quilt series for kernel-doc patches.
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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...as that makes for a cumbersome interface. Make it take a regular
smb_vol pointer and rely on the caller to zero it out if needed.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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Regression introduced by commit f87d39d9513.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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This call to cifs_cleanup_volume_info is clearly wrong. As soon as it's
called the following call to cifs_get_tcp_session will oops as the
volume_info pointer will then be NULL.
The caller of cifs_mount should clean up this data since it passed it
in. There's no need for us to call this here.
Regression introduced by commit 724d9f1cfba.
Reported-by: Adam Williamson <awilliam@redhat.com>
Cc: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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The l2x0_disable function attempts to writel with the l2x0_lock held.
This results in deadlock when the writel contains an outer_sync call
for the platform since the l2x0_lock is already held by the disable
function. A further problem is that disabling the L2 without flushing it
first can lead to the spin_lock operation becoming visible after the
spin_unlock, causing any subsequent L2 maintenance to deadlock.
This patch replaces the writel with a call to writel_relaxed in the
disabling code and adds a flush before disabling in the control
register, preventing livelock from occurring.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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It was discovered by Roberto Bergo, that RTS/DTR signals are inverted after
the boot, because it was causing him problems with hardware controlled modem
connected on ttyAM0. Todd Valentic came with this patch for the issue.
Discussion: http://tech.groups.yahoo.com/group/ts-7000/message/20259
Comments from Petr Štetiar:
Sorry, but forget to add Acked-by[1]:
1. https://patchwork.kernel.org/patch/873052/
Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Todd Valentic <todd.valentic@sri.com>
Tested-by: Roberto Bergo <roberto.bergo@robson.it>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Stresstesting insert/remove of SD-cards can trigger
a StartBitErr. This made the driver to hang in forever
waiting for a non ocurring data timeout.
This bit and interrupt is documented in the original
PL180 TRM, just never implemented until now.
Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Reviewed-by: Linus Walleij <linus.walleij@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This platform has not been converted to 'struct irq_data' when the big
pile was done and fails to compile nowadays. Tested on a JayPC-Tablet.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (46 commits)
[media] rc: call input_sync after scancode reports
[media] imon: allow either proto on unknown 0xffdc
[media] imon: auto-config ffdc 7e device
[media] saa7134: fix raw IR timeout value
[media] rc: fix ghost keypresses with certain hw
[media] [staging] lirc_serial: allocate irq at init time
[media] lirc_zilog: fix spinning rx thread
[media] keymaps: fix table for pinnacle pctv hd devices
[media] ite-cir: 8709 needs to use pnp resource 2
[media] V4L: mx1-camera: fix uninitialized variable
[media] omap_vout: Added check in reqbuf & mmap for buf_size allocation
[media] OMAP_VOUT: Change hardcoded device node number to -1
[media] OMAP_VOUTLIB: Fix wrong resizer calculation
[media] uvcvideo: Disable the queue when failing to start
[media] uvcvideo: Remove buffers from the queues when freeing
[media] uvcvideo: Ignore entities for terminals with no supported format
[media] v4l: Don't access media entity after is has been destroyed
[media] media: omap3isp: fix a potential NULL deref
[media] media: vb2: fix allocation failure check
[media] media: vb2: reset queued_count value during queue reinitialization
...
Fix up trivial conflict in MAINTAINERS as per Mauro
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The shdr4extnum variable isn't being freed in the cleanup process of
elf_fdpic_core_dump().
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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There is a bug in free_unnecessary_pages() that causes it to
attempt to free too many pages in some cases, which triggers the
BUG_ON() in memory_bm_clear_bit() for copy_bm. Namely, if
count_data_pages() is initially greater than alloc_normal, we get
to_free_normal equal to 0 and "save" greater from 0. In that case,
if the sum of "save" and count_highmem_pages() is greater than
alloc_highmem, we subtract a positive number from to_free_normal.
Hence, since to_free_normal was 0 before the subtraction and is
an unsigned int, the result is converted to a huge positive number
that is used as the number of pages to free.
Fix this bug by checking if to_free_normal is actually greater
than or equal to the number we're going to subtract from it.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-and-tested-by: Matthew Garrett <mjg@redhat.com>
Cc: stable@kernel.org
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Provides the ability to resize a resource that is already allocated.
This functionality is put in place to support reallocation needs of
pci resources.
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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locks_alloc_lock() assumed that the allocated struct file_lock is
already initialized to zero members. This is only true for the first
allocation of the structure, after reuse some of the members will have
random values.
This will for example result in passing random fl_start values to
userspace in fuse for FL_FLOCK locks, which is an information leak at
best.
Fix by reinitializing those members which may be non-zero after freeing.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Set up a correct I2C bus controller variant name for Exynos4.
Without this change the I2C bus driver fails to acquire its
clocks.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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If the driver didn't set this parameter on the ETHER, the CPU will
encounter the "data address error" exception.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When link was down, the bit of DM in ECMR was always set.
So, we could not use half-duplex mode on the controller.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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S5PC100 Compilation fails without this patch
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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The existing macro fails for following scenarios.
1) S5P64X0 channel 1
2) S5PV210 channel 1
The FIFO data level supported in the above SoCs either 64 or
256 bytes depending on the channel. Because of this the TX_DONE
is the 25 bit in the status register.
The existing macro works for the following scenarios
1) S3C6410 all channels
2) S5PC100 all channels
The FIFO data level supported in the above SoCs 64 bytes
on all the channels. Because of this the TX_DONE is the 21 bit
in the status register.
So when we use the existing macro for the non-working SoCs
it is not anding with the TX_DONE bit for transmission status check.
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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tx_st_done is required for checking the transmission status of SPI
channels with different fifo levels
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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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: fix regression occurring during device removal
USB: fsl_udc_core: fix build breakage when building for ARM arch
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git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
mfd: Add Makefile and Kconfig Entries for tps65911 comparator
mfd: Fix build error for tps65911-comparator.c
Revert "mfd: Add omap-usbhs runtime PM support"
input: pmic8xxx-pwrkey: Do not use mfd_get_data()
input: pmic8xxx-keypad: Do not use mfd_get_data()
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If gso/gro feature of underlying device is turned off，
then new created vlan device never can turn gso/gro on.
Although underlying device don't support TSO, we still
should use software segments for vlan device.
Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since git commit
660e34cebf0a11d54f2d5dd8838607452355f321 x86: reorder reboot method
preferences,
my Acer Aspire One hangs on reboot. It appears that its ACPI method
for rebooting is broken. The attached patch adds a quirk so that the
machine will reboot via the BIOS.
[ hpa: verified that the ACPI control on this machine is just plain broken. ]
Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>
Link: http://lkml.kernel.org/r/w439iki5vl.wl%25peter@chubb.wattle.id.au
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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If the rx ring is completely empty, then the device may never fire an rx
interrupt. Unfortunately, the rx interrupt is what triggers populating the
rx ring with fresh buffers, so this will cause networking to lock up.
This patch replenishes the skb in recv descriptor as soon as it is
peeled off while processing rx completions. If the skb/buffer
allocation fails, existing one is recycled and the packet in hand is
dropped. This way none of the RX desc is ever left empty, thus avoiding
starvation
Signed-off-by: Scott J. Goldman <scottjg@vmware.com>
Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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As is_multicast_ether_addr returns true on broadcast packets as
well, we need to explicitly exclude broadcast packets so that
they're always flooded. This wasn't an issue before as broadcast
packets were considered to be an unregistered multicast group,
which were always flooded. However, as we now only flood such
packets to router ports, this is no longer acceptable.
Reported-by: Michael Guntsche <mike@it-loops.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The section mismatch in headsmp.S made hotplug stop working after the
first instance of suspend-to-RAM and its wakeup.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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This patch fixes following.
<6>[ 0.000000] sched_clock: 32 bits at 33MHz, ...
<6>[ 128.651309] Calibrating delay loop...
There is a big jump. The reason is that PWM Timer which
is for HRTimer was used before its initialization.
So this patch changes its order and following is kernel
boot log message after this.
<6>[ 0.000000] sched_clock: 32 bits at 33MHz, ...
<6>[ 0.000088] Calibrating delay loop...
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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There has been no #ifndef - #define - #endif protection for this
header file.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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These pins are incorrectly configured for PCM2
configure them to SPDIF(_OUT & _EXT_CLK)
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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On SMDKV310 board, a card detect gpio pin is available that is directly
connected to the io pad of the sdhci controller. Fix incorrect value
of cd_type field in platform data for sdhci instance 0 and 2.
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
ceph: fix sync and dio writes across stripe boundaries
libceph: fix page calculation for non-page-aligned io
ceph: fix page alignment corrections
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Ensure that the meminfo array is sanity checked before we pass the
memory to memblock. This helps to ensure that memblock and meminfo
agree on the dimensions of memory, especially when more memory is
passed than the kernel can deal with.
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Now we have supply widgets there's no need to open code the handling of
the ACTIVE bit.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Liam Girdwood <lrg@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus:
hfsplus: Fix double iput of the same inode in hfsplus_fill_super()
hfsplus: add missing call to bio_put()
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The snd_card->driver field contains a driver name string, and in
general it shouldn't contain space or special letters. The commit
2b39535b9e54888649923beaab443af212b6c0fd changed the string copy from
card->name, but the long name string may contain such letters, thus
it may still lead to a segfault.
A temporary fix is not to copy the long name string but just keep it
empty as the earlier version did.
Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Following a request from Russell King:
http://lists.infradead.org/pipermail/linux-arm-kernel/2011-June/055031.html
Add myself as the ARM PMU profiling and debugging maintainer. This
covers the ARM implementations of perf, oprofile and hw_breakpoint along
with the glue for this to work on different platforms.
Cc: Jean Pihet <j-pihet@ti.com>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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armpmu_enable can be called in situations where no events are present
(for example, from the event rotation tick after a profiled task has
exited). In this case, we currently start the PMU anyway which may
leave it active inevitably without any events being monitored.
This patch adds a simple check to the enabling code so that we avoid
starting the PMU when no events are present.
Cc: <stable@kernel.org>
Reported-by: Ashwin Chaugle <ashwinc@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Alex reported that commit c8b281161df ("sched: Increase
SCHED_LOAD_SCALE resolution") caused a power usage regression
under light load as it increases the number of load-balance
operations and keeps idle cpus from staying idle.
Time has run out to find the root cause for this release so
disable the feature for v3.0 until we can figure out what
causes the problem.
Reported-by: "Alex, Shi" <alex.shi@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Nikhil Rao <ncrao@google.com>
Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-m4onxn0sxnyn5iz9o88eskc3@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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