30 Aug, 2014
1 commit
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Fix building errors occuring due to a missing export of
flush_icache_range() inkisskb.ellerman.id.au/kisskb/buildresult/11677809/
ERROR: "flush_icache_range" [drivers/misc/lkdtm.ko] undefined!
Signed-off-by: Pranith Kumar
Reported-by: Geert Uytterhoeven
Acked-by: Vineet Gupta [arc]
Acked-by: Richard Kuo [hexagon]
Cc: Chris Metcalf
Cc: Chris Zankel
Acked-by: Max Filippov [xtensa]
Cc: Noam Camus
Cc: Masami Hiramatsu
Acked-by: Zhigang Lu [tile]
Cc: Kirill Tkhai
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Aug, 2014
2 commits
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Pull arch signal handling cleanup from Richard Weinberger:
"This patch series moves all remaining archs to the get_signal(),
signal_setup_done() and sigsp() functions.Currently these archs use open coded variants of the said functions.
Further, unused parameters get removed from get_signal_to_deliver(),
tracehook_signal_handler() and signal_delivered().At the end of the day we save around 500 lines of code."
* 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits)
powerpc: Use sigsp()
openrisc: Use sigsp()
mn10300: Use sigsp()
mips: Use sigsp()
microblaze: Use sigsp()
metag: Use sigsp()
m68k: Use sigsp()
m32r: Use sigsp()
hexagon: Use sigsp()
frv: Use sigsp()
cris: Use sigsp()
c6x: Use sigsp()
blackfin: Use sigsp()
avr32: Use sigsp()
arm64: Use sigsp()
arc: Use sigsp()
sas_ss_flags: Remove nested ternary if
Rip out get_signal_to_deliver()
Clean up signal_delivered()
tracehook_signal_handler: Remove sig, info, ka and regs
... -
Pull ARC changes from Vineet Gupta:
"Mostly cleanup/refactoring in core intc, cache flush, IPI send..."* tag 'arc-v3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
mm, arc: remove obsolete pagefault oom killer comment
ARC: help gcc elide icache helper for !SMP
ARC: move common ops for line/full cache into helpers
ARC: cache boot reporting updates
ARC: [intc] mask/unmask can be hidden again
ARC: [plat-arcfpga] No need for init_irq hack
ARC: [intc] don't mask all IRQ by default
ARC: prune extra header includes from smp.c
ARC: update some comments
ARC: [SMP] unify cpu private IRQ requests (TIMER/IPI)
08 Aug, 2014
1 commit
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Commit 609838cfed97 ("mm: invoke oom-killer from remaining unconverted page
fault handlers") converted arc to call pagefault_out_of_memory(), so remove
the comment about future conversion.Cc: Johannes Weiner
Signed-off-by: David Rientjes
Signed-off-by: Vineet Gupta
06 Aug, 2014
2 commits
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Use sigsp() instead of the open coded variant.
Signed-off-by: Richard Weinberger
Acked-by: Vineet Gupta -
Use the more generic functions get_signal() signal_setup_done()
for signal delivery.Signed-off-by: Richard Weinberger
Acked-by: Vineet Gupta
05 Aug, 2014
2 commits
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Pull tty / serial driver update from Greg KH:
"Here's the big tty / serial driver update for 3.17-rc1.Nothing major, just a number of fixes and new features for different
serial drivers, and some more tty core fixes and documentation of the
tty locks.All of these have been in linux-next for a while"
* tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (82 commits)
tty/n_gsm.c: fix a memory leak in gsmld_open
pch_uart: don't hardcode PCI slot to get DMA device
tty: n_gsm, use setup_timer
Revert "ARC: [arcfpga] stdout-path now suffices for earlycon/console"
serial: sc16is7xx: Correct initialization of s->clk
serial: 8250_dw: Add support for deferred probing
serial: 8250_dw: Add optional reset control support
serial: st-asc: Fix overflow in baudrate calculation
serial: st-asc: Don't call BUG in asc_console_setup()
tty: serial: msm: Make of_device_id array const
tty/n_gsm.c: get gsm->num after gsm_activate_mux
serial/core: Fix too big allocation for attribute member
drivers/tty/serial: use correct type for dma_map/unmap
serial: altera_jtaguart: Fix putchar function passed to uart_console_write()
serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers
Serial: allow port drivers to have a default attribute group
tty: kgdb_nmi: Automatically manage tty enable
serial: altera_jtaguart: Adpot uart_console_write()
serial: samsung: improve code clarity by defining a variable
serial: samsung: correct the case and default order in switch
... -
Pull perf changes from Ingo Molnar:
"Kernel side changes:- Consolidate the PMU interrupt-disabled code amongst architectures
(Vince Weaver)- misc fixes
Tooling changes (new features, user visible changes):
- Add support for pagefault tracing in 'trace', please see multiple
examples in the changeset messages (Stanislav Fomichev).- Add pagefault statistics in 'trace' (Stanislav Fomichev)
- Add header for columns in 'top' and 'report' TUI browsers (Jiri
Olsa)- Add pagefault statistics in 'trace' (Stanislav Fomichev)
- Add IO mode into timechart command (Stanislav Fomichev)
- Fallback to syscalls:* when raw_syscalls:* is not available in the
perl and python perf scripts. (Daniel Bristot de Oliveira)- Add --repeat global option to 'perf bench' to be used in benchmarks
such as the existing 'futex' one, that was modified to use it
instead of a local option. (Davidlohr Bueso)- Fix fd -> pathname resolution in 'trace', be it using /proc or a
vfs_getname probe point. (Arnaldo Carvalho de Melo)- Add suggestion of how to set perf_event_paranoid sysctl, to help
non-root users trying tools like 'trace' to get a working
environment. (Arnaldo Carvalho de Melo)- Updates from trace-cmd for traceevent plugin_kvm plus args cleanup
(Steven Rostedt, Jan Kiszka)- Support S/390 in 'perf kvm stat' (Alexander Yarygin)
Tooling infrastructure changes:
- Allow reserving a row for header purposes in the hists browser
(Arnaldo Carvalho de Melo)- Various fixes and prep work related to supporting Intel PT (Adrian
Hunter)- Introduce multiple debug variables control (Jiri Olsa)
- Add callchain and additional sample information for python scripts
(Joseph Schuchart)- More prep work to support Intel PT: (Adrian Hunter)
- Polishing 'script' BTS output
- 'inject' can specify --kallsym
- VDSO is per machine, not a global var
- Expose data addr lookup functions previously private to 'script'
- Large mmap fixes in events processing- Include standard stringify macros in power pc code (Sukadev
Bhattiprolu)Tooling cleanups:
- Convert open coded equivalents to asprintf() (Andy Shevchenko)
- Remove needless reassignments in 'trace' (Arnaldo Carvalho de Melo)
- Cache the is_exit syscall test in 'trace) (Arnaldo Carvalho de
Melo)- No need to reimplement err() in 'perf bench sched-messaging', drop
barf(). (Davidlohr Bueso).- Remove ev_name argument from perf_evsel__hists_browse, can be
obtained from the other parameters. (Jiri Olsa)Tooling fixes:
- Fix memory leak in the 'sched-messaging' perf bench test.
(Davidlohr Bueso)- The -o and -n 'perf bench mem' options are mutually exclusive, emit
error when both are specified. (Davidlohr Bueso)- Fix scrollbar refresh row index in the ui browser, problem exposed
now that headers will be added and will be allowed to be switched
on/off. (Jiri Olsa)- Handle the num array type in python properly (Sebastian Andrzej
Siewior)- Fix wrong condition for allocation failure (Jiri Olsa)
- Adjust callchain based on DWARF debug info on powerpc (Sukadev
Bhattiprolu)- Fix a risk for doing free on uninitialized pointer in traceevent
lib (Rickard Strandqvist)- Update attr test with PERF_FLAG_FD_CLOEXEC flag (Jiri Olsa)
- Enable close-on-exec flag on perf file descriptor (Yann Droneaud)
- Fix build on gcc 4.4.7 (Arnaldo Carvalho de Melo)
- Event ordering fixes (Jiri Olsa)"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (123 commits)
Revert "perf tools: Fix jump label always changing during tracing"
perf tools: Fix perf usage string leftover
perf: Check permission only for parent tracepoint event
perf record: Store PERF_RECORD_FINISHED_ROUND only for nonempty rounds
perf record: Always force PERF_RECORD_FINISHED_ROUND event
perf inject: Add --kallsyms parameter
perf tools: Expose 'addr' functions so they can be reused
perf session: Fix accounting of ordered samples queue
perf powerpc: Include util/util.h and remove stringify macros
perf tools: Fix build on gcc 4.4.7
perf tools: Add thread parameter to vdso__dso_findnew()
perf tools: Add dso__type()
perf tools: Separate the VDSO map name from the VDSO dso name
perf tools: Add vdso__new()
perf machine: Fix the lifetime of the VDSO temporary file
perf tools: Group VDSO global variables into a structure
perf session: Add ability to skip 4GiB or more
perf session: Add ability to 'skip' a non-piped event stream
perf tools: Pass machine to vdso__dso_findnew()
perf tools: Add dso__data_size()
...
28 Jul, 2014
2 commits
-
Signed-off-by: Ingo Molnar
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This reverts commit 9da433c0a0b5f71ac92dc9dca778295649675f08.
Vineet writes:
Could you please revert this single patch from tty-next for 3.17 as the
needed core changes are not yet finalized.Cc: Vineet Gupta
Cc: Rob Herring
Signed-off-by: Greg Kroah-Hartman
23 Jul, 2014
9 commits
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Signed-off-by: Vineet Gupta
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INV cmd for dcache provides 2 modes discard or wback-before-discard.
One is default and other needs to be set, if so desired. This is common
for line-op/entire-cache-op. So refactor them out into a helperDoesn't affect generated code but paves way for any common
micro-optimization.Signed-off-by: Vineet Gupta
-
* print aliasing or not, VIPT/PIPT etc
* compress param storage using bitfields
* more use of IS_ENABLED to de-uglify codeSigned-off-by: Vineet Gupta
-
Signed-off-by: Vineet Gupta
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With all IRQs unmasked by default on all cores, it is no longer needed
to unmask them explicitly.Signed-off-by: Vineet Gupta
-
Hardware keeps them enabled on reset, and Linux needs to keep status quo.
Any spurious interrupts will be reported/blocked by genirq.This helps remove a SMP IRQ quirk (next commit), where a peripheral IRQ
is hard wired to core0, and request_irq()->unmask() happens on core1,
keeping the IRQ masked on core0, needing an explicit unmask.Signed-off-by: Vineet Gupta
-
Signed-off-by: Vineet Gupta
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Signed-off-by: Vineet Gupta
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The current cpu-private IRQ registration is ugly as it requires need to
expose arch_unmask_irq() outside of intc code.
So switch to percpu IRQ APIs:
-request_percpu_irq [boot core]
-enable_percpu_irq [all cores]Encapsulated in helper arc_request_percpu_irq()
Signed-off-by: Vineet Gupta
17 Jul, 2014
1 commit
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The arch_mutex_cpu_relax() function, introduced by 34b133f, is
hacky and ugly. It was added a few years ago to address the fact
that common cpu_relax() calls include yielding on s390, and thus
impact the optimistic spinning functionality of mutexes. Nowadays
we use this function well beyond mutexes: rwsem, qrwlock, mcs and
lockref. Since the macro that defines the call is in the mutex header,
any users must include mutex.h and the naming is misleading as well.This patch (i) renames the call to cpu_relax_lowlatency ("relax, but
only if you can do it with very low latency") and (ii) defines it in
each arch's asm/processor.h local header, just like for regular cpu_relax
functions. On all archs, except s390, cpu_relax_lowlatency is simply cpu_relax,
and thus we can take it out of mutex.h. While this can seem redundant,
I believe it is a good choice as it allows us to move out arch specific
logic from generic locking primitives and enables future(?) archs to
transparently define it, similarly to System Z.Signed-off-by: Davidlohr Bueso
Signed-off-by: Peter Zijlstra
Cc: Andrew Morton
Cc: Anton Blanchard
Cc: Aurelien Jacquiot
Cc: Benjamin Herrenschmidt
Cc: Bharat Bhushan
Cc: Catalin Marinas
Cc: Chen Liqin
Cc: Chris Metcalf
Cc: Christian Borntraeger
Cc: Chris Zankel
Cc: David Howells
Cc: David S. Miller
Cc: Deepthi Dharwar
Cc: Dominik Dingel
Cc: Fenghua Yu
Cc: Geert Uytterhoeven
Cc: Guan Xuetao
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Heiko Carstens
Cc: Helge Deller
Cc: Hirokazu Takata
Cc: Ivan Kokshaysky
Cc: James E.J. Bottomley
Cc: James Hogan
Cc: Jason Wang
Cc: Jesper Nilsson
Cc: Joe Perches
Cc: Jonas Bonn
Cc: Joseph Myers
Cc: Kees Cook
Cc: Koichi Yasutake
Cc: Lennox Wu
Cc: Linus Torvalds
Cc: Mark Salter
Cc: Martin Schwidefsky
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Neuling
Cc: Michal Simek
Cc: Mikael Starvik
Cc: Nicolas Pitre
Cc: Paolo Bonzini
Cc: Paul Burton
Cc: Paul E. McKenney
Cc: Paul Gortmaker
Cc: Paul Mackerras
Cc: Qais Yousef
Cc: Qiaowei Ren
Cc: Rafael Wysocki
Cc: Ralf Baechle
Cc: Richard Henderson
Cc: Richard Kuo
Cc: Russell King
Cc: Steven Miao
Cc: Steven Rostedt
Cc: Stratos Karafotis
Cc: Tim Chen
Cc: Tony Luck
Cc: Vasily Kulikov
Cc: Vineet Gupta
Cc: Vineet Gupta
Cc: Waiman Long
Cc: Will Deacon
Cc: Wolfram Sang
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: linux390@de.ibm.com
Cc: linux-alpha@vger.kernel.org
Cc: linux-am33-list@redhat.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-cris-kernel@axis.com
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux@lists.openrisc.net
Cc: linux-m32r-ja@ml.linux-m32r.org
Cc: linux-m32r@ml.linux-m32r.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-metag@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/1404079773.2619.4.camel@buesod1.americas.hpqcorp.net
Signed-off-by: Ingo Molnar
11 Jul, 2014
3 commits
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With recent improvements to serial/of core from Grant and Rob,
stdout-path alone suffices for setting up earlycon/console.arc_uart driver is already equipped to handle that, switch the DT now.
Signed-off-by: Vineet Gupta
Reviewed-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman -
With ARC uart driver switching to generic earlycon, we no longer need
this ugliness. You won't be missed.Signed-off-by: Vineet Gupta
Reviewed-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman -
Signed-off-by: Vineet Gupta
Reviewed-by: Rob Herring
Signed-off-by: Greg Kroah-Hartman
26 Jun, 2014
5 commits
-
icaches are not snooped hence not cohrent in SMP setups which means
kernel has to do cross core calls to ensure the same.The leaf routine __ic_line_inv_vaddr() now does cross core calls.
__sync_icache_dcache() is affected due to this:
* local dcache line flushed ahead of remote icache inv requests
* can't disable interrupts anymore, since
__ic_line_inv_vaddr()->on_each_cpu() can deadlock.| WARNING: CPU: 0 PID: 1 at kernel/smp.c:374
| smp_call_function_many+0x25a/0x2c4()
|
| init_kprobes+0x90/0xc8
| register_kprobe+0x1d6/0x510
| __sync_icache_dcache+0x28/0x80
|
| DISABLE IRQ
|
| __ic_line_inv_vaddr
| on_each_cpu
| smp_call_function_many+0x25a/0x2c4 --> WARN
| __ic_line_inv_vaddr_local
| __dc_line_op* TODO: Needs to use mask of relevant CPUs to avoid broadcasting
Signed-off-by: Noam Camus
Signed-off-by: Vineet Gupta -
Handle it just like timer. Current request_percpu_irq() would fail on
non-boot cpus and thus IRQ will remian unmasked on those cpus.[vgupta: fix changelong]
Signed-off-by: Noam Camus
Signed-off-by: Vineet Gupta -
This patch adds implementation of GET_THREAD_AREA ptrace request type. This
is required by GDB to debug NPTL applications.Signed-off-by: Anton Kolesov
Signed-off-by: Vineet Gupta -
using ARC ZOL which reduces tot num of instructions by half
Signed-off-by: Vineet Gupta
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Fixes: ec7ac6afd07b (ARC: switch to generic ENTRY/END assembler annotations)
Reported-by: Anton Kolesov
Signed-off-by: Vineet Gupta
23 Jun, 2014
1 commit
-
Signed-off-by: Vineet Gupta
19 Jun, 2014
1 commit
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Transition to using the new generic PERF_PMU_CAP_NO_INTERRUPT method for
failing a sampling event when no PMU interrupt is available.Signed-off-by: Vince Weaver
Acked-by: Vineet Gupta
Signed-off-by: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Cc: Grant Likely
Cc: Paul Mackerras
Cc: Rob Herring
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1406150159280.16738@vincent-weaver-1.umelst.maine.edu
Signed-off-by: Ingo Molnar
16 Jun, 2014
1 commit
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There's no Kconfig symbol ARC_MMU_V4 so the checks for CONFIG_ARC_MMU_V4
will always evaluate to false. Remove them.Signed-off-by: Paul Bolle
Signed-off-by: Vineet Gupta
10 Jun, 2014
1 commit
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Pull ARC updates from Vineet Gupta:
"Nothing too exciting here, just minor fixes/cleanup. Only noteworthy
ones are:- Moving cache disabling to early boot
- ARC UART enabled only if earlyprintk setup in cmdline"* tag 'arc-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: Disable caches in early boot if so configured
ARC: [arcfpga] Early ARC UART to be only activated by cmdline
ARC: [arcfpga] Get rid of legacy BVCI latency unit support
ARC: remove duplicate header exports
ARC: arc_local_timer_setup() need not pass own cpu id
ARC: Fixed spelling errors within comments
ARC: make start_thread() out-of-line
ARC: fix mmuv2 warning
ARC: [SMP] ISS SMP extension bitrot
05 Jun, 2014
2 commits
-
Performing vma lookups without taking the mm->mmap_sem is asking for
trouble. While doing the search, the vma in question can be modified or
even removed before returning to the caller. Take the lock (shared) in
order to avoid races while iterating through the vmacache and/or rbtree.[akpm@linux-foundation.org: CSE current->active_mm, per Vineet]
Signed-off-by: Davidlohr Bueso
Acked-by: Vineet Gupta
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
…/robh/linux into next
Pull DeviceTree updates from Rob Herring:
- Another round of clean-up of FDT related code in architecture code.
This removes knowledge of internal FDT details from most
architectures except powerpc.
- Conversion of kernel's custom FDT parsing code to use libfdt.
- DT based initialization for generic serial earlycon. The
introduction of generic serial earlycon support went in through the
tty tree.
- Improve the platform device naming for DT probed devices to ensure
unique naming and use parent names instead of a global index.
- Fix a race condition in of_update_property.
- Unify the various linker section OF match tables and fix several
function prototype errors.
- Update platform_get_irq_byname to work in deferred probe cases.
- 2 binding doc updates* tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (58 commits)
of: handle NULL node in next_child iterators
of/irq: provide more wrappers for !CONFIG_OF
devicetree: bindings: Document micrel vendor prefix
dt: bindings: dwc2: fix required value for the phy-names property
of_pci_irq: kill useless variable in of_irq_parse_pci()
of/irq: do irq resolution in platform_get_irq_byname()
of: Add a testcase for of_find_node_by_path()
of: Make of_find_node_by_path() handle /aliases
of: Create unlocked version of for_each_child_of_node()
lib: add glibc style strchrnul() variant
of: Handle memory@0 node on PPC32 only
pci/of: Remove dead code
of: fix race between search and remove in of_update_property()
of: Use NULL for pointers
of: Stop naming platform_device using dcr address
of: Ensure unique names without sacrificing determinism
tty/serial: pl011: add DT based earlycon support
of/fdt: add FDT serial scanning for earlycon
of/fdt: add FDT address translation support
serial: earlycon: add DT support
...
04 Jun, 2014
1 commit
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…el/git/tip/tip into next
Pull core locking updates from Ingo Molnar:
"The main changes in this cycle were:- reduced/streamlined smp_mb__*() interface that allows more usecases
and makes the existing ones less buggy, especially in rarer
architectures- add rwsem implementation comments
- bump up lockdep limits"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
rwsem: Add comments to explain the meaning of the rwsem's count field
lockdep: Increase static allocations
arch: Mass conversion of smp_mb__*()
arch,doc: Convert smp_mb__*()
arch,xtensa: Convert smp_mb__*()
arch,x86: Convert smp_mb__*()
arch,tile: Convert smp_mb__*()
arch,sparc: Convert smp_mb__*()
arch,sh: Convert smp_mb__*()
arch,score: Convert smp_mb__*()
arch,s390: Convert smp_mb__*()
arch,powerpc: Convert smp_mb__*()
arch,parisc: Convert smp_mb__*()
arch,openrisc: Convert smp_mb__*()
arch,mn10300: Convert smp_mb__*()
arch,mips: Convert smp_mb__*()
arch,metag: Convert smp_mb__*()
arch,m68k: Convert smp_mb__*()
arch,m32r: Convert smp_mb__*()
arch,ia64: Convert smp_mb__*()
...
03 Jun, 2014
5 commits
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Requested-by: Noam Camus
Signed-off-by: Vineet Gupta -
Earlier CONFIG_SERIAL_ARC_CONSOLE would unconditionally enable the
legacy ARC UART based early console even if platform lacked that UART
(e.g. nSIM OSCI platform).So a multi-platform image containing the 2 UART drivers won't work.
Fix that by probing the driver only if "earlyprintk=ttyARC0" is present
in cmdline.Reported-by: Chuck Jordan
Signed-off-by: Vineet Gupta -
Signed-off-by: Vineet Gupta
-
Signed-off-by: Vineet Gupta
-
Signed-off-by: Vineet Gupta