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git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux
Pull ACCESS_ONCE cleanup preparation from Christian Borntraeger:
"kernel: Provide READ_ONCE and ASSIGN_ONCE
As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com
ACCESS_ONCE might fail with specific compilers for non-scalar
accesses.
Here is a set of patches to tackle that problem.
The first patch introduce READ_ONCE and ASSIGN_ONCE. If the data
structure is larger than the machine word size memcpy is used and a
warning is emitted. The next patches fix up several in-tree users of
ACCESS_ONCE on non-scalar types.
This does not yet contain a patch that forces ACCESS_ONCE to work only
on scalar types. This is targetted for the next merge window as Linux
next already contains new offenders regarding ACCESS_ONCE vs.
non-scalar types"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux:
s390/kvm: REPLACE barrier fixup with READ_ONCE
arm/spinlock: Replace ACCESS_ONCE with READ_ONCE
arm64/spinlock: Replace ACCESS_ONCE READ_ONCE
mips/gup: Replace ACCESS_ONCE with READ_ONCE
x86/gup: Replace ACCESS_ONCE with READ_ONCE
x86/spinlock: Replace ACCESS_ONCE with READ_ONCE
mm: replace ACCESS_ONCE with READ_ONCE or barriers
kernel: Provide READ_ONCE and ASSIGN_ONCE
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ACCESS_ONCE does not work reliably on non-scalar types. For
example gcc 4.6 and 4.7 might remove the volatile tag for such
accesses during the SRA (scalar replacement of aggregates) step
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145)
Change the gup code to replace ACCESS_ONCE with READ_ONCE.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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git://git.linaro.org/people/mike.turquette/linux
Pull clk framework updates from Mike Turquette:
"This is much later than usual due to several last minute bugs that had
to be addressed. As usual the majority of changes are new drivers and
modifications to existing drivers. The core recieved many fixes along
with the groundwork for several large changes coming in the future
which will better parition clock providers from clock consumers"
* tag 'clk-for-linus-3.19' of git://git.linaro.org/people/mike.turquette/linux: (86 commits)
clk: samsung: Fix Exynos 5420 pinctrl setup and clock disable failure due to domain being gated
ARM: OMAP3: clock: fix boot breakage in legacy mode
ARM: OMAP2+: clock: fix DPLL code to use new determine rate APIs
clk: Really fix deadlock with mmap_sem
clk: mmp: fix sparse non static symbol warning
clk: Change clk_ops->determine_rate to return a clk_hw as the best parent
clk: change clk_debugfs_add_file to take a struct clk_hw
clk: Don't expose __clk_get_accuracy
clk: Don't try to use a struct clk* after it could have been freed
clk: Remove unused function __clk_get_prepare_count
clk: samsung: Fix double add of syscore ops after driver rebind
clk: samsung: exynos4: set parent of sclk_hdmiphy to hdmi
clk: samsung: exynos4415: Fix build with PM_SLEEP disabled
clk: samsung: remove unnecessary inclusion of header files from clk.h
clk: samsung: remove unnecessary CONFIG_OF from clk.c
clk: samsung: Spelling s/bwtween/between/
clk: rockchip: Add support for the mmc clock phases using the framework
clk: rockchip: add bindings for the mmc clocks
clk: rockchip: rk3288 export i2s0_clkout for use in DT
clk: rockchip: use clock ID for DMC (memory controller) on rk3288
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This is in preparation for clock providers to not have to deal with struct clk.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
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Having switched over all of the users of CONFIG_PM_RUNTIME to use
CONFIG_PM directly, turn the latter into a user-selectable option
and drop the former entirely from the tree.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core update from Greg KH:
"Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes,
just removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There
are some ath9k patches coming in through this tree that have been
acked by the wireless maintainers as they relied on the debugfs
changes.
Everything has been in linux-next for a while"
* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
fs: debugfs: add forward declaration for struct device type
firmware class: Deletion of an unnecessary check before the function call "vunmap"
firmware loader: fix hung task warning dump
devcoredump: provide a one-way disable function
device: Add dev_<level>_once variants
ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
ath: use seq_file api for ath9k debugfs files
debugfs: add helper function to create device related seq_file
drivers/base: cacheinfo: remove noisy error boot message
Revert "core: platform: add warning if driver has no owner"
drivers: base: support cpu cache information interface to userspace via sysfs
drivers: base: add cpu_device_create to support per-cpu devices
topology: replace custom attribute macros with standard DEVICE_ATTR*
cpumask: factor out show_cpumap into separate helper function
driver core: Fix unbalanced device reference in drivers_probe
driver core: fix race with userland in device_add()
sysfs/kernfs: make read requests on pre-alloc files use the buffer.
sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
fs: sysfs: return EGBIG on write if offset is larger than file size
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next
Remove all .owner fields from platform drivers
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB updates from Greg KH:
"Here's the big set of USB and PHY patches for 3.19-rc1.
The normal churn in the USB gadget area is in here, as well as xhci
and other individual USB driver updates. The PHY tree is also in
here, as there were dependancies on the USB tree.
All of these have been in linux-next"
* tag 'usb-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (351 commits)
arm: omap3: twl: remove usb phy init data
usbip: fix error handling in stub_probe()
usb: gadget: udc: missing curly braces
USB: mos7720: delete some unneeded code
wusb: replace memset by memzero_explicit
usbip: remove unneeded structure
usb: xhci: fix comment for PORT_DEV_REMOVE
xhci: don't use the same variable for stopped and halted rings current TD
xhci: clear extra bits from slot context when setting max exit latency
xhci: cleanup finish_td function
USB: adutux: NULL dereferences on disconnect
usb: chipidea: fix platform_no_drv_owner.cocci warnings
usb: chipidea: Fixed a few typos in comments
Documentation: bindings: add doc for the USB2 ChipIdea USB driver
usb: chipidea: add a usb2 driver for ci13xxx
usb: chipidea: fix phy handling
usb: chipidea: remove duplicate dev_set_drvdata for host_start
usb: chipidea: parameter 'mode' isn't needed for hw_device_reset
usb: chipidea: add controller reset API
usb: chipidea: remove flag CI_HDRC_REQUIRE_TRANSCEIVER
...
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We need the xhci fixes here and this resolves a merge issue with
drivers/usb/dwc3/ep0.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Remove special-purpose octeon drivers and instead use ehci-platform
and ohci-platform as suggested with
http://marc.info/?l=linux-mips&m=140139694721623&w=2
[andreas.herrmann:
fixed compile error]
Cc: David Daney <david.daney@cavium.com>
Cc: Alex Smith <alex.smith@imgtec.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull another networking update from David Miller:
"Small follow-up to the main merge pull from the other day:
1) Alexander Duyck's DMA memory barrier patch set.
2) cxgb4 driver fixes from Karen Xie.
3) Add missing export of fixed_phy_register() to modules, from Mark
Salter.
4) DSA bug fixes from Florian Fainelli"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (24 commits)
net/macb: add TX multiqueue support for gem
linux/interrupt.h: remove the definition of unused tasklet_hi_enable
jme: replace calls to redundant function
net: ethernet: davicom: Allow to select DM9000 for nios2
net: ethernet: smsc: Allow to select SMC91X for nios2
cxgb4: Add support for QSA modules
libcxgbi: fix freeing skb prematurely
cxgb4i: use set_wr_txq() to set tx queues
cxgb4i: handle non-pdu-aligned rx data
cxgb4i: additional types of negative advice
cxgb4/cxgb4i: set the max. pdu length in firmware
cxgb4i: fix credit check for tx_data_wr
cxgb4i: fix tx immediate data credit check
net: phy: export fixed_phy_register()
fib_trie: Fix trie balancing issue if new node pushes down existing node
vlan: Add ability to always enable TSO/UFO
r8169:update rtl8168g pcie ephy parameter
net: dsa: bcm_sf2: force link for all fixed PHY devices
fm10k/igb/ixgbe: Use dma_rmb on Rx descriptor reads
r8169: Use dma_rmb() and dma_wmb() for DescOwn checks
...
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There are a number of situations where the mandatory barriers rmb() and
wmb() are used to order memory/memory operations in the device drivers
and those barriers are much heavier than they actually need to be. For
example in the case of PowerPC wmb() calls the heavy-weight sync
instruction when for coherent memory operations all that is really needed
is an lsync or eieio instruction.
This commit adds a coherent only version of the mandatory memory barriers
rmb() and wmb(). In most cases this should result in the barrier being the
same as the SMP barriers for the SMP case, however in some cases we use a
barrier that is somewhere in between rmb() and smp_rmb(). For example on
ARM the rmb barriers break down as follows:
Barrier Call Explanation
--------- -------- ----------------------------------
rmb() dsb() Data synchronization barrier - system
dma_rmb() dmb(osh) data memory barrier - outer sharable
smp_rmb() dmb(ish) data memory barrier - inner sharable
These new barriers are not as safe as the standard rmb() and wmb().
Specifically they do not guarantee ordering between coherent and incoherent
memories. The primary use case for these would be to enforce ordering of
reads and writes when accessing coherent memory that is shared between the
CPU and a device.
It may also be noted that there is no dma_mb(). Most architectures don't
provide a good mechanism for performing a coherent only full barrier without
resorting to the same mechanism used in mb(). As such there isn't much to
be gained in trying to define such a function.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: David Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch is meant to cleanup the handling of read_barrier_depends and
smp_read_barrier_depends. In multiple spots in the kernel headers
read_barrier_depends is defined as "do {} while (0)", however we then go
into the SMP vs non-SMP sections and have the SMP version reference
read_barrier_depends, and the non-SMP define it as yet another empty
do/while.
With this commit I went through and cleaned out the duplicate definitions
and reduced the number of definitions down to 2 per header. In addition I
moved the 50 line comments for the macro from the x86 and mips headers that
defined it as an empty do/while to those that were actually defining the
macro, alpha and blackfin.
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ralf Baechle says:
"This should have been part of the merge commit c0222ac08666 (Merge
branch 'upstream' of git://git.linux-mips.org/pub/scm/-
ralf/upstream-linus) but I forgot to mention the need for this in my
pull request"
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree update from Jiri Kosina:
"Usual stuff: documentation updates, printk() fixes, etc"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (24 commits)
intel_ips: fix a type in error message
cpufreq: cpufreq-dt: Move newline to end of error message
ps3rom: fix error return code
treewide: fix typo in printk and Kconfig
ARM: dts: bcm63138: change "interupts" to "interrupts"
Replace mentions of "list_struct" to "list_head"
kernel: trace: fix printk message
scsi: mpt2sas: fix ioctl in comment
zbud, zswap: change module author email
clocksource: Fix 'clcoksource' typo in comment
arm: fix wording of "Crotex" in CONFIG_ARCH_EXYNOS3 help
gpio: msm-v1: make boolean argument more obvious
usb: Fix typo in usb-serial-simple.c
PCI: Fix comment typo 'COMFIG_PM_OPS'
powerpc: Fix comment typo 'CONIFG_8xx'
powerpc: Fix comment typos 'CONFiG_ALTIVEC'
clk: st: Spelling s/stucture/structure/
isci: Spelling s/stucture/structure/
usb: gadget: zero: Spelling s/infrastucture/infrastructure/
treewide: Fix company name in module descriptions
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This patch fix spelling typo in printk and Kconfig within
various part of kernel sources.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Pull MIPS updates from Ralf Baechle:
"This is an unusually large pull request for MIPS - in parts because
lots of patches missed the 3.18 deadline but primarily because some
folks opened the flood gates.
- Retire the MIPS-specific phys_t with the generic phys_addr_t.
- Improvments for the backtrace code used by oprofile.
- Better backtraces on SMP systems.
- Cleanups for the Octeon platform code.
- Cleanups and fixes for the Loongson platform code.
- Cleanups and fixes to the firmware library.
- Switch ATH79 platform to use the firmware library.
- Grand overhault to the SEAD3 and Malta interrupt code.
- Move the GIC interrupt code to drivers/irqchip
- Lots of GIC cleanups and updates to the GIC code to use modern IRQ
infrastructures and features of the kernel.
- OF documentation updates for the GIC bindings
- Move GIC clocksource driver to drivers/clocksource
- Merge GIC clocksource driver with clockevent driver.
- Further updates to bring the GIC clocksource driver up to date.
- R3000 TLB code cleanups
- Improvments to the Loongson 3 platform code.
- Convert pr_warning to pr_warn.
- Merge a bunch of small lantiq and ralink fixes that have been
staged/lingering inside the openwrt tree for a while.
- Update archhelp for IP22/IP32
- Fix a number of issues for Loongson 1B.
- New clocksource and clockevent driver for Loongson 1B.
- Further work on clk handling for Loongson 1B.
- Platform work for Broadcom BMIPS.
- Error handling cleanups for TurboChannel.
- Fixes and optimization to the microMIPS support.
- Option to disable the FTLB.
- Dump more relevant information on machine check exception
- Change binfmt to allow arch to examine PT_*PROC headers
- Support for new style FPU register model in O32
- VDSO randomization.
- BCM47xx cleanups
- BCM47xx reimplement the way the kernel accesses NVRAM information.
- Random cleanups
- Add support for ATH25 platforms
- Remove pointless locking code in some PCI platforms.
- Some improvments to EVA support
- Minor Alchemy cleanup"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (185 commits)
MIPS: Add MFHC0 and MTHC0 instructions to uasm.
MIPS: Cosmetic cleanups of page table headers.
MIPS: Add CP0 macros for extended EntryLo registers
MIPS: Remove now unused definition of phys_t.
MIPS: Replace use of phys_t with phys_addr_t.
MIPS: Replace MIPS-specific 64BIT_PHYS_ADDR with generic PHYS_ADDR_T_64BIT
PCMCIA: Alchemy Don't select 64BIT_PHYS_ADDR in Kconfig.
MIPS: lib: memset: Clean up some MIPS{EL,EB} ifdefery
MIPS: iomap: Use __mem_{read,write}{b,w,l} for MMIO
MIPS: <asm/types.h> fix indentation.
MAINTAINERS: Add entry for BMIPS multiplatform kernel
MIPS: Enable VDSO randomization
MIPS: Remove a temporary hack for debugging cache flushes in SMTC configuration
MIPS: Remove declaration of obsolete arch_init_clk_ops()
MIPS: atomic.h: Reformat to fit in 79 columns
MIPS: Apply `.insn' to fixup labels throughout
MIPS: Fix microMIPS LL/SC immediate offsets
MIPS: Kconfig: Only allow 32-bit microMIPS builds
MIPS: signal.c: Fix an invalid cast in ISA mode bit handling
MIPS: mm: Only build one microassembler that is suitable
...
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New instructions for Extended Physical Addressing (XPA) functionality.
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8453/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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* Clean up white spaces and tabs.
* Remove _PAGE_R4KBUG which is no longer used.
* Get rid of hardcoded values and calculate shifts and
masks where possible.
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8457/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Add read/write macros to access the upper bits of the
extended EntryLo0 and EntryLo1 registers used by XPA.
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8455/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The toolchain defines exactly one of __MIPSEB__ and
__MIPSEL__. As a result, simplify the ifdefery a little bit.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8522/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Using the __raw_{read,write}{b,w,l} functions to perform
repeatable MMIO could result in problems if the host bus
does not match the endianness of the PCI/ISA. This problem
is visible on big-endian SEAD3 configurations after commit
2925f6c0c7af32720dcbadc586463aeceb6baa22
"net: smc911x: use io{read,write}*_rep accessors". This effectively
moves away from using the __mem_* variants to __raw_* ones
and causes a kernel bug as follows:
Call Trace:
CPU 0 Unable to handle kernel paging request at virtual address 00000000,
epc == 00000000, ra == 8012b3b0
Oops[#1]:
Cpu 0
$ 0 : 00000000 00000065 00000000 00000004
$ 4 : 00000000 00000000 9a82dd60 00000000
$ 8 : 00000000 00000000 a00ae278 00000007
$12 : 0000000e 00000011 804c4228 ffff9411
$16 : 00000100 00000000 80560000 807fc6d0
$20 : 807fc8d0 807fcad0 807fbec0 00000100
$24 : 00009150 80109be0
$28 : 9a82c000 9a82dd28 00000001 8012b3b0
Hi : 00000000
Lo : 00000000
epc : 00000000 (null)
Not tainted
ra : 8012b3b0 call_timer_fn.isra.39+0x24/0x84
Status: 10009503 KERNEL EXL IE
Cause : 00800808
BadVA : 00000000
PrId : 00019c20 (MIPS M14Kc)
Modules linked in:
Process swapper (pid: 1, threadinfo=9a82c000, task=9a82ba18, tls=00000000)
Stack : 00000040 00000000 00000007 8056732c 80580000 00000001 9a82dd60 00200200
80560000 8012b598 8056732c 80580000 00000001 00000000 9a82dd60 9a82dd60
00000000 807fbd44 807fbd40 805664e0 0000000a 80800000 00000004 80125924
0000fda0 000007f0 80000000 00000001 80800000 007f0000 00200140 80166338
00000000 8100fda0 0000fda0 000007f0 80000000 00000001 80800000 007f0000
...
Call Trace:
[<8012b598>] run_timer_softirq+0x188/0x1f4
[<80125924>] __do_softirq+0xc4/0x18c
[<80166338>] handle_percpu_irq+0x54/0x84
[<80125aa4>] do_softirq+0x68/0x70
[<80103b50>] do_IRQ+0x18/0x28
[<80125d1c>] irq_exit+0x94/0xc0
[<80125aa4>] do_softirq+0x68/0x70
[<80102130>] ret_from_irq+0x0/0x4
[<80102130>] ret_from_irq+0x0/0x4
[<80125d1c>] irq_exit+0x94/0xc0
[<803165b0>] __bzero+0xd4/0x164
[<80346d0c>] mem32_serial_out+0x0/0x1c
[<8010d4ac>] free_init_pages+0x98/0xfc
[<80180a08>] free_hot_cold_page+0x2c/0x1c4
[<80180bd8>] __free_pages+0x38/0x98
[<8010d4a0>] free_init_pages+0x8c/0xfc
[<8010d4ac>] free_init_pages+0x98/0xfc
[<8049fb04>] kernel_init+0x28/0x15c
[<80147484>] schedule_tail+0x1c/0x60
[<8049fadc>] kernel_init+0x0/0x15c
[<80102178>] ret_from_kernel_thread+0x14/0x1c
[<8040a06f>] skb_pad+0xe7/0x13c
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: Steve Glendinning <steve.glendinning@shawell.net>
Cc: Ben Boeckel <mathstuf@gmail.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Cc: Jeffrey Deans <Jeffrey.Deans@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6672/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Based on commit 1091458d09e1a (mmap randomization)
For 32-bit address spaces randomize within a
16MB space, for 64-bit within a 256MB space.
Test Results:
------------
Without Patch (VDSO is not randomized)
---------------------------------------
root@Maleo:~# ./aslr vdso
FAIL: ASLR not functional (vdso always at 0x7fff7000)
root@Maleo:~# ./aslr rekey vdso
pre_val==cur_val
value=0x7fff7000
With patch:(VDSO is randmoized and doesn't interfere with stack)
----------------------------------------------------------------
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7f830ea2
current_value=0x776e2000
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7fb0cea2
current_value=0x77209000
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7f985ea2
current_value=0x7770c000
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7fbc6ea2
current_value=0x7fe25000
Maps file output:
-------------------------
root@cavium-octeon2:~# ./aslr rekey maps
78584000-785a5000 rwxp 00000000 00:00 0 [heap]
7f9d0000-7f9f1000 rw-p 00000000 00:00 0 [stack]
7ffa5000-7ffa6000 r-xp 00000000 00:00 0 [vdso]
root@cavium-octeon2:~# ./aslr rekey maps
77de0000-77e01000 rwxp 00000000 00:00 0 [heap]
7f91b000-7f93c000 rw-p 00000000 00:00 0 [stack]
7ff99000-7ff9a000 r-xp 00000000 00:00 0 [vdso]
root@cavium-octeon2:~# ./aslr rekey maps
77d7f000-77da0000 rwxp 00000000 00:00 0 [heap]
7fc2a000-7fc4b000 rw-p 00000000 00:00 0 [stack]
7fe09000-7fe0a000 r-xp 00000000 00:00 0 [vdso]
root@cavium-octeon2:~# ./aslr rekey maps
7794c000-7794d000 r-xp 00000000 00:00 0 [vdso]
77e4b000-77e6c000 rwxp 00000000 00:00 0 [heap]
7f6e7000-7f708000 rw-p 00000000 00:00 0 [stack]
root@cavium-octeon2:~#
Signed-off-by: Prem Karat <pkarat@mvista.com>
Cc: linux-mips@linux-mips.org
Cc: sergei.shtylyov@cogentembedded.com
Cc: ddaney.cavm@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/6812
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: aaro.koskinen@iki.fi
Cc: david.daney@cavium.com
Cc: linux-kernel@vger.kernel.org
Cc: markos.chandras@imgtec.com
Cc: dengcheng.zhu@imgtec.com
Cc: chenhc@lemote.com
Cc: akpm@linux-foundation.org
Patchwork: https://patchwork.linux-mips.org/patch/8535/
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Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Cc: Apelete Seketeli <apelete@seketeli.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7671/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8484/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Fix the issue with the ISA bit being lost in fixups that jump to labels
placed just before a section switch. Such a switch leads to the ISA bit
being lost, because GAS concludes there is no code that follows and
therefore the label refers to data. Use the `.insn' pseudo-op to
convince the tool this is not the case.
This lack of label annotation leads to microMIPS compilation errors
like:
mips-linux-gnu-ld: arch/mips/built-in.o: .fixup+0x3b8: Unsupported jump between ISA modes; consider recompiling with interlinking enabled.
mips-linux-gnu-ld: final link failed: Bad value
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8483/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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In the microMIPS encoding some memory access instructions have their
immediate offset reduced to 12 bits only. That does not match the GCC
`R' constraint we use in some places to satisfy the requirement,
resulting in build failures like this:
{standard input}: Assembler messages:
{standard input}:720: Error: macro used $at after ".set noat"
{standard input}:720: Warning: macro instruction expanded into multiple instructions
Fix the problem by defining a macro, `GCC_OFF12_ASM', that expands to
the right constraint depending on whether microMIPS or standard MIPS
code is produced. Also apply the fix to where `m' is used as in the
worst case this change does nothing, e.g. where the pointer was already
in a register such as a function argument and no further offset was
requested, and in the best case it avoids an extraneous sequence of up
to two instructions to load the high 20 bits of the address in the LL/SC
loop. This reduces the risk of lock contention that is the higher the
more instructions there are in the critical section between LL and SC.
Strictly speaking we could just bulk-replace `R' with `ZC' as the latter
constraint adjusts automatically depending on the ISA selected.
However it was only introduced with GCC 4.9 and we keep supporing older
compilers for the standard MIPS configuration, hence the slightly more
complicated approach I chose.
The choice of a zero-argument function-like rather than an object-like
macro was made so that it does not look like a function call taking the
C expression used for the constraint as an argument. This is so as not
to confuse the reader or formatting checkers like `checkpatch.pl' and
follows previous practice.
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8482/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Only allow 32-bit microMIPS builds, we're not ready yet for 64-bit
microMIPS support.
QEMU does have support for the 64-bit microMIPS ISA and with minor
tweaks it is possible to have a 64-bit processor emulated there that
runs microMIPS code, so despite the lack of actual 64-bit microMIPS
hardware there is a way to run 64-bit microMIPS Linux, but it can all be
considered early development and we are not there yet. Userland tools
are lacking too, e.g. GCC produces bad code:
{standard input}: Assembler messages:
{standard input}:380: Warning: wrong size instruction in a 16-bit branch delay slot
And our build fails early on, so disable the configuration, for the sake
of automatic random config checkers if nothing else. Whoever needs to
experiment with 64-bit microMIPS support can revert this change easily.
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8481/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Fix:
arch/mips/kernel/signal.c: In function 'handle_signal':
arch/mips/kernel/signal.c:533:21: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
unsigned int tmp = (unsigned int)current->mm->context.vdso;
^
arch/mips/kernel/signal.c:536:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
vdso = (void *)tmp;
^
cc1: all warnings being treated as errors
when building a 64-bit kernel.
This is not really a supported configuration, but the cast is wrong
either way, Linux makes the assumption that sizeof(void *) equals
sizeof(unsigned long) and therefore the latter type is expected to be
used where integer operations have to be applied to pointers for some
reason.
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8480/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The microMIPS microassembler is only suitable for configurations where
the kernel itself is built to microMIPS machine code and not where only
user microMIPS software is supported. The former is controlled with the
CPU_MICROMIPS configuration setting, whereas SYS_SUPPORTS_MICROMIPS is
used for the latter.
Not only that, but with a given microMIPS vs standard MIPS kernel
configuration only one microassembler is needed, that matches the ISA
selected -- CP0.Config3.ISAOnExc is mandatory on microMIPS processors,
so there is never a need to mix microMIPS and standard MIPS code.
Consequently build only the microassembler that matches the ISA selected
for the kernel.
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8479/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Add missing microMIPS support to Malta. Currently the kernel only
enables support for the instruction set for the SEAD-3 board despite the
fact processor features have nothing to do with the board a processor is
installed in.
In this case there is no way to run microMIPS software in a fully
supported way under Linux on QEMU. QEMU supports the emulation of a
Malta board, but does not emulate SEAD-3. Linux supports running
microMIPS code on a SEAD-3 board, but hardcodes such support to off on
an emulated Malta board even if the processor selected has the microMIPS
instruction set implemented.
Adding support for the SEAD-3 to QEMU is a major project. Flipping a
bit in the kernel that shouldn't have been cleared in the first place is
a trivial effort. Thus the answer is plain...
Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8478/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Make loongson_rtc_resources static to eliminate the following
sparse warning:
warning: symbol 'loongson_rtc_resources' was not declared. Should it be static?
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8529/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Add a missing include to eliminate the following sparse warnings:
warning: symbol 'prom_init' was not declared. Should it be static?
warning: symbol 'prom_free_prom_memory' was not declared. Should it be static?
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8531/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Make ml2f_reboot static to elimite the following sparse warning:
warning: symbol 'ml2f_reboot' was not declared. Should it be static?
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8528/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Make internal static to eliminate the following sparse warnings:
warning: symbol 'ip6_irqaction' was not declared. Should it be static?
warning: symbol 'cascade_irqaction' was not declared. Should it be static?
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8527/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Add a missing include to get rid of the following sparse warning:
warning: symbol 'plat_mem_setup' was not declared. Should it be static?
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8530/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Add a missing include to get rid of the following sparse warnings:
warning: symbol 'cs5536_pci_conf_write4' was not declared. Should it be static?
warning: symbol 'cs5536_pci_conf_read4' was not declared. Should it be static?
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8526/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Fix array initializer syntax to get rid of the following sparse warnings:
"obsolete array initializer, use C99 syntax".
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8525/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Building a 64bit kernel for the SGI O2 (IP32) and the SGI Indy (IP22) uses
the 'vmlinux.32' target, which converts the output 64-bit 'vmlinux' image
into a 32-bit wrapped image. This is needed for certain revisions of the
IP22 and IP32 ARCS PROMs to boot correctly, but this target is missing
from the 'archhelp' info that is emitted by 'make help'.
Signed-off-by: Joshua Kinard <kumba@gentoo.org>
Cc: Linux MIPS List <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7991/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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