Benefit from pci store block instruction by writing up to 128 bytes
with a single instruction to MMIO space. Depending on the workload
this can result in a huge performance increase due to the reduced
number of instructions. The ordering guarantees of single stores
vs. one store block are identical.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* for_3.8-rc1: (243 commits)
[media] omap3isp: Replace cpu_is_omap3630() with ISP revision check
[media] omap3isp: Prepare/unprepare clocks before/after enable/disable
[media] omap3isp: preview: Add support for 8-bit formats at the sink pad
[media] omap3isp: Replace printk with dev_*
[media] omap3isp: Find source pad from external entity
[media] omap3isp: Configure CSI-2 phy based on platform data
[media] omap3isp: Add PHY routing configuration
[media] omap3isp: Add CSI configuration registers from control block to ISP resources
[media] omap3isp: Remove unneeded module memory address definitions
[media] omap3isp: Use monotonic timestamps for statistics buffers
[media] uvcvideo: Fix control value clamping for unsigned integer controls
[media] uvcvideo: Mark first output terminal as default video node
[media] uvcvideo: Add VIDIOC_[GS]_PRIORITY support
[media] uvcvideo: Return -ENOTTY for unsupported ioctls
[media] uvcvideo: Set device_caps in VIDIOC_QUERYCAP
[media] uvcvideo: Don't fail when an unsupported format is requested
[media] uvcvideo: Return -EACCES when trying to access a read/write-only control
[media] uvcvideo: Set error_idx properly for extended controls API failures
[media] rtl28xxu: add NOXON DAB/DAB+ USB dongle rev 2
[media] fc2580: write some registers conditionally
...
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Merge tag 'v3.7' into v4l_for_linus
Linux 3.7
* tag 'v3.7': (1545 commits)
Linux 3.7
Input: matrix-keymap - provide proper module license
Revert "revert "Revert "mm: remove __GFP_NO_KSWAPD""" and associated damage
ipv4: ip_check_defrag must not modify skb before unsharing
Revert "mm: avoid waking kswapd for THP allocations when compaction is deferred or contended"
inet_diag: validate port comparison byte code to prevent unsafe reads
inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
inet_diag: validate byte code to prevent oops in inet_diag_bc_run()
inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
mm: vmscan: fix inappropriate zone congestion clearing
vfs: fix O_DIRECT read past end of block device
net: gro: fix possible panic in skb_gro_receive()
tcp: bug fix Fast Open client retransmission
tmpfs: fix shared mempolicy leak
mm: vmscan: do not keep kswapd looping forever due to individual uncompactable zones
mm: compaction: validate pfn range passed to isolate_freepages_block
mmc: sh-mmcif: avoid oops on spurious interrupts (second try)
Revert misapplied "mmc: sh-mmcif: avoid oops on spurious interrupts"
mmc: sdhci-s3c: fix missing clock for gpio card-detect
lib/Makefile: Fix oid_registry build dependency
...
Having a linear_min_sel setting means the first linear_min_sel selectors are
invalid. We need to subtract linear_min_sel when use n_voltages to determinate
if regulator can change voltage.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
The commit [23670b322: drm/i915: CPT+ pch transcoder workaround]
caused a regression on some HP laptops with IvyBridge. The whole
laptop screen is shifted downward for a few pixels constantly.
The problem appears only on LVDS while DP and VGA seem unaffected.
Also, the problem disappears once when go and back from S3.
(S4 resume still shows the same problem.)
This patch revives the minimum part the commit above dropped.
For fixing this regression, only the setup of CHICKEN2 bit in
cpt_init_clock_gating() is needed.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Not all architectures (in particular, sparc64) have empty_zero_page.
So instead of copying from empty_zero_page, use memset to clear the
inline data by signalling to ext4_xattr_set_entry() via a magic
pointer value, EXT4_ZERO_ATTR_VALUE, which is defined by casting -1 to
a pointer.
This fixes a build failure on sparc64, and the memset() should be more
efficient than using memcpy() anyway.
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit changes the CMA early initialization code to use phys_addr_t
for representing physical addresses instead of unsigned long.
Without this change, among other things, dma_declare_contiguous() simply
discards any memory regions whose address is not representable as unsigned
long.
This is a problem on 32-bit PAE machines where unsigned long is 32-bit
but physical address space is larger.
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
dmapool always calls dma_alloc_coherent() with GFP_ATOMIC flag,
regardless the flags provided by the caller. This causes excessive
pruning of emergency memory pools without any good reason. Additionaly,
on ARM architecture any driver which is using dmapools will sooner or
later trigger the following error:
"ERROR: 256 KiB atomic DMA coherent pool is too small!
Please increase it with coherent_pool= kernel parameter!".
Increasing the coherent pool size usually doesn't help much and only
delays such error, because all GFP_ATOMIC DMA allocations are always
served from the special, very limited memory pool.
This patch changes the dmapool code to correctly use gfp flags provided
by the dmapool caller.
Reported-by: Soeren Moch <smoch@web.de>
Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Soeren Moch <smoch@web.de>
Cc: stable@vger.kernel.org
Some gate clocks have special needs which must be handled during the
disable-unused clocks sequence. These needs might be driven by software
due to the fact that we're disabling a clock outside of the normal
clk_disable path and a clk's enable_count will not be accurate. On the
other hand a specific hardware programming sequence might need to be
followed for this corner case.
This change is needed for the upcoming OMAP port to the common clock
framework. Specifically, it is undesirable to treat the disable-unused
path identically to the normal clk_disable path since other software
layers are involved. In this case OMAP's clockdomain code throws WARNs
and bails early due to the clock's enable_count being set to zero. A
custom callback mitigates this problem nicely.
Cc: Paul Walmsley <paul@pwsan.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch modifies the DVS register read function to select correct DVS1
register. This change is required because the GPIO select pin is 000 in
unintialized state and hence selects the DVS1 register.
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
The arch/arm64/Makefile was not passing the right target to the
boot/dts/Makefile.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
The REALVIEW EB board can host tiles with multiple cores thus needs
to be able to initialise SMP. There is, however, no .smp entry in
the MACHINE_START struct for REALVIEW_EB.
This patch adds the appropriate .smp entry to this struct.
Signed-off-by: Steve Capper <steve.capper@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The kernel can only be entered on HYP mode on CPUs which actually
support it, i.e. >= ARMv7. pre-v6 platform support cannot coexist
in the same kernel as support for v7 and higher, so there is no
advantage in having the HYP mode check on pre-v6 hardware.
At least one pre-v6 board is known to fail when the HYP mode check
code is present, although the exact cause remains unknown and may
be unrelated. [1]
This patch restores the old behaviour for pre-v6 platforms, whereby
the CPSR is forced directly to SVC mode with IRQs and FIQs masked.
All kernels capable of booting on v7 hardware will retain the
check, so this should not impair functionality.
[1] http://lists.arm.linux.org.uk/lurker/message/20121130.013814.19218413.en.html
([ARM] head.S change broke platform device registration?)
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The offset must be multiplied by 4 to be sure to access the correct
32bit word in the stack scratch space.
For instance, a store at scratch memory cell #1 was generating the
following:
st r4, [sp, #1]
While the correct code for this is:
st r4, [sp, #4]
To reproduce the bug (assuming your system has a NIC with the mac
address 52:54:00:12:34:56):
echo 0 > /proc/sys/net/core/bpf_jit_enable
tcpdump -ni eth0 "ether[1] + ether[2] - ether[3] * ether[4] - ether[5] \
== -0x3AA" # this will capture packets as expected
echo 1 > /proc/sys/net/core/bpf_jit_enable
tcpdump -ni eth0 "ether[1] + ether[2] - ether[3] * ether[4] - ether[5] \
== -0x3AA" # this will not.
This bug was present since the original inclusion of bpf_jit for ARM
(ddecdfce: ARM: 7259/3: net: JIT compiler for packet filters).
Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
syscall_trace_exit is currently doing things back-to-front; invoking
the audit hook *after* signalling the debugger, which presents an
opportunity for the registers to be re-written by userspace in order to
bypass auditing constaints.
This patch fixes the ordering by moving the audit code first and the
tracehook code last. On the face of it, it looks like
current_thread_info()->syscall may be incorrect for the sys_exit
tracepoint, but that's actually not an issue because it will have been
set during syscall entry and cannot have changed since then.
Reported-by: Andrew Gabbasov <Andrew_Gabbasov@mentor.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Not all the architectures have readsl/writesl,
use the more portable ioread32_rep/iowrite32_rep functions instead.
Signed-off-by: Davide Ciminaghi <ciminaghi@gnudd.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Official prototype for kzalloc is:
void *kzalloc(size_t, gfp_t);
The ARM bpf_jit code was having the assumption that it was:
void *kzalloc(gfp_t, size);
This was resulting the use of some random GFP flags depending on the
size requested and some random overflows once the really needed size
was more than the value of GFP_KERNEL.
This bug was present since the original inclusion of bpf_jit for ARM
(ddecdfce: ARM: 7259/3: net: JIT compiler for packet filters).
Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The matrix-keymap module is currently lacking a proper module license,
add one so we don't have this module tainting the entire kernel. This
issue has been present since commit 1932811f42 ("Input: matrix-keymap
- uninline and prepare for device tree support")
Signed-off-by: Florian Fainelli <florian@openwrt.org>
CC: stable@vger.kernel.org # v3.5+
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull networking fixes from David Miller:
1) Netlink socket dumping had several missing verifications and checks.
In particular, address comparisons in the request byte code
interpreter could access past the end of the address in the
inet_request_sock.
Also, address family and address prefix lengths were not validated
properly at all.
This means arbitrary applications can read past the end of certain
kernel data structures.
Fixes from Neal Cardwell.
2) ip_check_defrag() operates in contexts where we're in the process
of, or about to, input the packet into the real protocols
(specifically macvlan and AF_PACKET snooping).
Unfortunately, it does a pskb_may_pull() which can modify the
backing packet data which is not legal if the SKB is shared. It
very much can be shared in this context.
Deal with the possibility that the SKB is segmented by using
skb_copy_bits().
Fix from Johannes Berg based upon a report by Eric Leblond.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
ipv4: ip_check_defrag must not modify skb before unsharing
inet_diag: validate port comparison byte code to prevent unsafe reads
inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
inet_diag: validate byte code to prevent oops in inet_diag_bc_run()
inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
Since the aemif driver conversion to DT along with
its movement to drivers/ folder is not yet done,
fix NAND binding documentation to have NAND specific
DT details only.
Signed-off-by: Kumar, Anil <anilkumar.v@ti.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Alex writes:
"adds support for the
asynchronous DMA engines on r6xx-SI. These engines are used
for ttm bo moves and VM page table updates currently. They
could also be exposed via the CS ioctl for userspace use,
but I haven't had a chance to add proper CS checker patches
for them yet. These patches have been tested extensively
internally for months, so they should be pretty solid."
* 'drm-next-3.8' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: use DMA engine for VM page table updates on SI
drm/radeon: add dma engine support for vm pt updates on si (v2)
drm/radeon: use DMA engine for VM page table updates on cayman/TN
drm/radeon: add dma engine support for vm pt updates on ni (v5)
drm/radeon: use async dma for ttm buffer moves on 6xx-SI
drm/radeon/kms: add support for dma rings to radeon_test_moves()
drm/radeon/kms: Add initial support for async DMA on SI
drm/radeon/kms: Add initial support for async DMA on cayman/TN
drm/radeon/kms: Add initial support for async DMA on evergreen
drm/radeon/kms: Add initial support for async DMA on r6xx/r7xx
The spi support code works on SPARC too. No reason to exclude it from
the party.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
DMA engine has special packets to facilitate this and it also keeps
the 3D engine free for other things.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
DMA engine has special packets to facilitate this and it also keeps
the 3D engine free for other things.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Async DMA has a special packet for contiguous pt updates
which saves overhead.
v2: leave the CP method enabled for now as doing the updates
in the DMA rings is not working properly yet.
v3: update for 2 level pts
v4: rebase
v5: drop pte/pde packet. doesn't seem to work on NI.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
The description for tcp_fin_timeout should be tigher and more clear.
In addition to being tighter, we should make the spelling of the
state name consistent with what utilities report, remove the now
dated reference to 2.2 and put the default in the consistent place.
Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There are 2 async DMA engines on cayman, one at 0xd000 and
one at 0xd800. The programming interface is the same as
evergreen however there are some changes to the commands
for using vmids.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Pretty similar to 6xx/7xx except the count field increased in the
packet header and the max IB size increased.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
