Eric Lee / smarc-fsl-linux-kernel

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

22 Sep, 2016

1 commit

  • 2765262f7   cris: fix Kconfig mismatch when building with CONFIG_PCI ... Browse Code »

    I/O port access. Normally there is no I/O space on CRIS but when
    Cardbus/PCI is enabled the request is passed through the bridge.

    lib/pci_iomap.c: In function ‘pci_iomap_range’:
    lib/pci_iomap.c:43:3: error: implicit declaration of function ‘ioport_map’ [-Werror=implicit-function-declaration]
    return __pci_ioport_map(dev, start, len);
    ^

    Signed-off-by: Niklas Cassel
    Signed-off-by: Jesper Nilsson

    Niklas Cassel
     

21 May, 2016

2 commits

  • 42a0bb3f7   printk/nmi: generic solution for safe printk in NMI ... Browse Code »

    printk() takes some locks and could not be used a safe way in NMI
    context.

    The chance of a deadlock is real especially when printing stacks from
    all CPUs. This particular problem has been addressed on x86 by the
    commit a9edc8809328 ("x86/nmi: Perform a safe NMI stack trace on all
    CPUs").

    The patchset brings two big advantages. First, it makes the NMI
    backtraces safe on all architectures for free. Second, it makes all NMI
    messages almost safe on all architectures (the temporary buffer is
    limited. We still should keep the number of messages in NMI context at
    minimum).

    Note that there already are several messages printed in NMI context:
    WARN_ON(in_nmi()), BUG_ON(in_nmi()), anything being printed out from MCE
    handlers. These are not easy to avoid.

    This patch reuses most of the code and makes it generic. It is useful
    for all messages and architectures that support NMI.

    The alternative printk_func is set when entering and is reseted when
    leaving NMI context. It queues IRQ work to copy the messages into the
    main ring buffer in a safe context.

    __printk_nmi_flush() copies all available messages and reset the buffer.
    Then we could use a simple cmpxchg operations to get synchronized with
    writers. There is also used a spinlock to get synchronized with other
    flushers.

    We do not longer use seq_buf because it depends on external lock. It
    would be hard to make all supported operations safe for a lockless use.
    It would be confusing and error prone to make only some operations safe.

    The code is put into separate printk/nmi.c as suggested by Steven
    Rostedt. It needs a per-CPU buffer and is compiled only on
    architectures that call nmi_enter(). This is achieved by the new
    HAVE_NMI Kconfig flag.

    The are MN10300 and Xtensa architectures. We need to clean up NMI
    handling there first. Let's do it separately.

    The patch is heavily based on the draft from Peter Zijlstra, see

    https://lkml.org/lkml/2015/6/10/327

    [arnd@arndb.de: printk-nmi: use %zu format string for size_t]
    [akpm@linux-foundation.org: min_t->min - all types are size_t here]
    Signed-off-by: Petr Mladek
    Suggested-by: Peter Zijlstra
    Suggested-by: Steven Rostedt
    Cc: Jan Kara
    Acked-by: Russell King [arm part]
    Cc: Daniel Thompson
    Cc: Jiri Kosina
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Ralf Baechle
    Cc: Benjamin Herrenschmidt
    Cc: Martin Schwidefsky
    Cc: David Miller
    Cc: Daniel Thompson
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Petr Mladek
     
  • 5f56a5dfd   exit_thread: remove empty bodies ... Browse Code »

    Define HAVE_EXIT_THREAD for archs which want to do something in
    exit_thread. For others, let's define exit_thread as an empty inline.

    This is a cleanup before we change the prototype of exit_thread to
    accept a task parameter.

    [akpm@linux-foundation.org: fix mips]
    Signed-off-by: Jiri Slaby
    Cc: "David S. Miller"
    Cc: "H. Peter Anvin"
    Cc: "James E.J. Bottomley"
    Cc: Aurelien Jacquiot
    Cc: Benjamin Herrenschmidt
    Cc: Catalin Marinas
    Cc: Chen Liqin
    Cc: Chris Metcalf
    Cc: Chris Zankel
    Cc: David Howells
    Cc: Fenghua Yu
    Cc: Geert Uytterhoeven
    Cc: Guan Xuetao
    Cc: Haavard Skinnemoen
    Cc: Hans-Christian Egtvedt
    Cc: Heiko Carstens
    Cc: Helge Deller
    Cc: Ingo Molnar
    Cc: Ivan Kokshaysky
    Cc: James Hogan
    Cc: Jeff Dike
    Cc: Jesper Nilsson
    Cc: Jiri Slaby
    Cc: Jonas Bonn
    Cc: Koichi Yasutake
    Cc: Lennox Wu
    Cc: Ley Foon Tan
    Cc: Mark Salter
    Cc: Martin Schwidefsky
    Cc: Matt Turner
    Cc: Max Filippov
    Cc: Michael Ellerman
    Cc: Michal Simek
    Cc: Mikael Starvik
    Cc: Paul Mackerras
    Cc: Peter Zijlstra
    Cc: Ralf Baechle
    Cc: Rich Felker
    Cc: Richard Henderson
    Cc: Richard Kuo
    Cc: Richard Weinberger
    Cc: Russell King
    Cc: Steven Miao
    Cc: Thomas Gleixner
    Cc: Tony Luck
    Cc: Vineet Gupta
    Cc: Will Deacon
    Cc: Yoshinori Sato
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jiri Slaby
     

26 Apr, 2016

1 commit

03 Nov, 2015

1 commit

  • 9f4137fa2   cris: time: Cleanup of persistent clock stuff ... Browse Code »

    - Remove update_persistent_clock(), as it does nothing now.
    - Remove read_persistent_clock(), let it fall back to the weak version.

    Cc: Mikael Starvik
    Cc: John Stultz
    Cc: Arnd Bergmann
    Signed-off-by: Xunlei Pang
    Acked-by: Rabin Vincent
    Signed-off-by: Jesper Nilsson

    Xunlei Pang
     

05 Sep, 2015

4 commits

25 Mar, 2015

7 commits

29 Jan, 2015

1 commit

08 Apr, 2014

2 commits

  • ce816fa88   Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP ... Browse Code »

    If the renamed symbol is defined lib/iomap.c implements ioport_map and
    ioport_unmap and currently (nearly) all platforms define the port
    accessor functions outb/inb and friend unconditionally. So
    HAS_IOPORT_MAP is the better name for this.

    Consequently NO_IOPORT is renamed to NO_IOPORT_MAP.

    The motivation for this change is to reintroduce a symbol HAS_IOPORT
    that signals if outb/int et al are available. I will address that at
    least one merge window later though to keep surprises to a minimum and
    catch new introductions of (HAS|NO)_IOPORT.

    The changes in this commit were done using:

    $ git grep -l -E '(NO|HAS)_IOPORT' | xargs perl -p -i -e 's/\b((?:CONFIG_)?(?:NO|HAS)_IOPORT)\b/$1_MAP/'

    Signed-off-by: Uwe Kleine-König
    Acked-by: Arnd Bergmann
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Uwe Kleine-König
     
  • ae797bdf7   cris: make ETRAX_ARCH_V10 select TTY for use in debugport ... Browse Code »

    Fix breakage which will be exposed by the patch "kconfig: make allnoconfig
    disable options behind EMBEDDED and EXPERT".

    arch/cris/arch-v10/kernel/debugport.c, compiled in unconditionally with
    ETRAX_ARCH_V10, requires TTY, so select TTY to avoid a build failure.

    Signed-off-by: Josh Triplett
    Cc: Stephen Rothwell
    Cc: Mikael Starvik
    Cc: Jesper Nilsson
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Josh Triplett
     

15 Jan, 2014

1 commit

16 Oct, 2013

1 commit

  • 3bc28ab6d   cpufreq: remove CONFIG_CPU_FREQ_TABLE ... Browse Code »

    CONFIG_CPU_FREQ_TABLE will be always enabled when cpufreq framework is used, as
    cpufreq core depends on it. So, we don't need this CONFIG option anymore as it
    is not configurable. Remove CONFIG_CPU_FREQ_TABLE and update its users.

    Signed-off-by: Viresh Kumar
    Signed-off-by: Rafael J. Wysocki

    Viresh Kumar
     

13 Sep, 2013

1 commit

10 Sep, 2013

3 commits

04 Jul, 2013

1 commit

  • f991fae5c   Merge tag 'pm+acpi-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm ... Browse Code »

    Pull power management and ACPI updates from Rafael Wysocki:
    "This time the total number of ACPI commits is slightly greater than
    the number of cpufreq commits, but Viresh Kumar (who works on cpufreq)
    remains the most active patch submitter.

    To me, the most significant change is the addition of offline/online
    device operations to the driver core (with the Greg's blessing) and
    the related modifications of the ACPI core hotplug code. Next are the
    freezer updates from Colin Cross that should make the freezing of
    tasks a bit less heavy weight.

    We also have a couple of regression fixes, a number of fixes for
    issues that have not been identified as regressions, two new drivers
    and a bunch of cleanups all over.

    Highlights:

    - Hotplug changes to support graceful hot-removal failures.

    It sometimes is necessary to fail device hot-removal operations
    gracefully if they cannot be carried out completely. For example,
    if memory from a memory module being hot-removed has been allocated
    for the kernel's own use and cannot be moved elsewhere, it's
    desirable to fail the hot-removal operation in a graceful way
    rather than to crash the kernel, but currenty a success or a kernel
    crash are the only possible outcomes of an attempted memory
    hot-removal. Needless to say, that is not a very attractive
    alternative and it had to be addressed.

    However, in order to make it work for memory, I first had to make
    it work for CPUs and for this purpose I needed to modify the ACPI
    processor driver. It's been split into two parts, a resident one
    handling the low-level initialization/cleanup and a modular one
    playing the actual driver's role (but it binds to the CPU system
    device objects rather than to the ACPI device objects representing
    processors). That's been sort of like a live brain surgery on a
    patient who's riding a bike.

    So this is a little scary, but since we found and fixed a couple of
    regressions it caused to happen during the early linux-next testing
    (a month ago), nobody has complained.

    As a bonus we remove some duplicated ACPI hotplug code, because the
    ACPI-based CPU hotplug is now going to use the common ACPI hotplug
    code.

    - Lighter weight freezing of tasks.

    These changes from Colin Cross and Mandeep Singh Baines are
    targeted at making the freezing of tasks a bit less heavy weight
    operation. They reduce the number of tasks woken up every time
    during the freezing, by using the observation that the freezer
    simply doesn't need to wake up some of them and wait for them all
    to call refrigerator(). The time needed for the freezer to decide
    to report a failure is reduced too.

    Also reintroduced is the check causing a lockdep warining to
    trigger when try_to_freeze() is called with locks held (which is
    generally unsafe and shouldn't happen).

    - cpufreq updates

    First off, a commit from Srivatsa S Bhat fixes a resume regression
    introduced during the 3.10 cycle causing some cpufreq sysfs
    attributes to return wrong values to user space after resume. The
    fix is kind of fresh, but also it's pretty obvious once Srivatsa
    has identified the root cause.

    Second, we have a new freqdomain_cpus sysfs attribute for the
    acpi-cpufreq driver to provide information previously available via
    related_cpus. From Lan Tianyu.

    Finally, we fix a number of issues, mostly related to the
    CPUFREQ_POSTCHANGE notifier and cpufreq Kconfig options and clean
    up some code. The majority of changes from Viresh Kumar with bits
    from Jacob Shin, Heiko Stübner, Xiaoguang Chen, Ezequiel Garcia,
    Arnd Bergmann, and Tang Yuantian.

    - ACPICA update

    A usual bunch of updates from the ACPICA upstream.

    During the 3.4 cycle we introduced support for ACPI 5 extended
    sleep registers, but they are only supposed to be used if the
    HW-reduced mode bit is set in the FADT flags and the code attempted
    to use them without checking that bit. That caused suspend/resume
    regressions to happen on some systems. Fix from Lv Zheng causes
    those registers to be used only if the HW-reduced mode bit is set.

    Apart from this some other ACPICA bugs are fixed and code cleanups
    are made by Bob Moore, Tomasz Nowicki, Lv Zheng, Chao Guan, and
    Zhang Rui.

    - cpuidle updates

    New driver for Xilinx Zynq processors is added by Michal Simek.

    Multidriver support simplification, addition of some missing
    kerneldoc comments and Kconfig-related fixes come from Daniel
    Lezcano.

    - ACPI power management updates

    Changes to make suspend/resume work correctly in Xen guests from
    Konrad Rzeszutek Wilk, sparse warning fix from Fengguang Wu and
    cleanups and fixes of the ACPI device power state selection
    routine.

    - ACPI documentation updates

    Some previously missing pieces of ACPI documentation are added by
    Lv Zheng and Aaron Lu (hopefully, that will help people to
    uderstand how the ACPI subsystem works) and one outdated doc is
    updated by Hanjun Guo.

    - Assorted ACPI updates

    We finally nailed down the IA-64 issue that was the reason for
    reverting commit 9f29ab11ddbf ("ACPI / scan: do not match drivers
    against objects having scan handlers"), so we can fix it and move
    the ACPI scan handler check added to the ACPI video driver back to
    the core.

    A mechanism for adding CMOS RTC address space handlers is
    introduced by Lan Tianyu to allow some EC-related breakage to be
    fixed on some systems.

    A spec-compliant implementation of acpi_os_get_timer() is added by
    Mika Westerberg.

    The evaluation of _STA is added to do_acpi_find_child() to avoid
    situations in which a pointer to a disabled device object is
    returned instead of an enabled one with the same _ADR value. From
    Jeff Wu.

    Intel BayTrail PCH (Platform Controller Hub) support is added to
    the ACPI driver for Intel Low-Power Subsystems (LPSS) and that
    driver is modified to work around a couple of known BIOS issues.
    Changes from Mika Westerberg and Heikki Krogerus.

    The EC driver is fixed by Vasiliy Kulikov to use get_user() and
    put_user() instead of dereferencing user space pointers blindly.

    Code cleanups are made by Bjorn Helgaas, Nicholas Mazzuca and Toshi
    Kani.

    - Assorted power management updates

    The "runtime idle" helper routine is changed to take the return
    values of the callbacks executed by it into account and to call
    rpm_suspend() if they return 0, which allows us to reduce the
    overall code bloat a bit (by dropping some code that's not
    necessary any more after that modification).

    The runtime PM documentation is updated by Alan Stern (to reflect
    the "runtime idle" behavior change).

    New trace points for PM QoS are added by Sahara
    ().

    PM QoS documentation is updated by Lan Tianyu.

    Code cleanups are made and minor issues are addressed by Bernie
    Thompson, Bjorn Helgaas, Julius Werner, and Shuah Khan.

    - devfreq updates

    New driver for the Exynos5-bus device from Abhilash Kesavan.

    Minor cleanups, fixes and MAINTAINERS update from MyungJoo Ham,
    Abhilash Kesavan, Paul Bolle, Rajagopal Venkat, and Wei Yongjun.

    - OMAP power management updates

    Adaptive Voltage Scaling (AVS) SmartReflex voltage control driver
    updates from Andrii Tseglytskyi and Nishanth Menon."

    * tag 'pm+acpi-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (162 commits)
    cpufreq: Fix cpufreq regression after suspend/resume
    ACPI / PM: Fix possible NULL pointer deref in acpi_pm_device_sleep_state()
    PM / Sleep: Warn about system time after resume with pm_trace
    cpufreq: don't leave stale policy pointer in cdbs->cur_policy
    acpi-cpufreq: Add new sysfs attribute freqdomain_cpus
    cpufreq: make sure frequency transitions are serialized
    ACPI: implement acpi_os_get_timer() according the spec
    ACPI / EC: Add HP Folio 13 to ec_dmi_table in order to skip DSDT scan
    ACPI: Add CMOS RTC Operation Region handler support
    ACPI / processor: Drop unused variable from processor_perflib.c
    cpufreq: tegra: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: s3c64xx: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: omap: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: imx6q: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: dbx500: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: powernow-k8: call CPUFREQ_POSTCHANGE notfier in error cases
    cpufreq: pcc: call CPUFREQ_POSTCHANGE notfier in error cases
    ...

    Linus Torvalds
     

18 Jun, 2013

1 commit

16 Jun, 2013

1 commit

  • acf836301   cris: Switch cris to drivers/Kconfig ... Browse Code »

    allmodconfig:

    drivers/video/console/fonts.c:71:2: error: #error No fonts configured.

    This is caused by cris not using the generic drivers/Kconfig, and thus not
    traversing drivers/video/console/Kconfig.
    As the build system does traverse drivers/video/console/Makefile, fonts.c
    was compiled with an inconsistent configuration.

    Signed-off-by: Geert Uytterhoeven

    Geert Uytterhoeven
     

05 Apr, 2013

1 commit

13 Mar, 2013

1 commit

  • 4febd95a8   Select VIRT_TO_BUS directly where needed ... Browse Code »

    In commit 887cbce0adea ("arch Kconfig: centralise ARCH_NO_VIRT_TO_BUS")
    I introduced the config sybmol HAVE_VIRT_TO_BUS and selected that where
    needed. I am not sure what I was thinking. Instead, just directly
    select VIRT_TO_BUS where it is needed.

    Signed-off-by: Stephen Rothwell
    Signed-off-by: Linus Torvalds

    Stephen Rothwell
     

28 Feb, 2013

1 commit

  • 887cbce0a   arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS ... Browse Code »

    Change it to CONFIG_HAVE_VIRT_TO_BUS and set it in all architecures
    that already provide virt_to_bus().

    Signed-off-by: Stephen Rothwell
    Reviewed-by: James Hogan
    Cc: Bjorn Helgaas
    Cc: H Hartley Sweeten
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: "David S. Miller"
    Cc: Paul Mundt
    Cc: Vineet Gupta
    Cc: James Bottomley
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Stephen Rothwell
     

14 Feb, 2013

1 commit

  • d64008a8f   burying unused conditionals ... Browse Code »

    __ARCH_WANT_SYS_RT_SIGACTION,
    __ARCH_WANT_SYS_RT_SIGSUSPEND,
    __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND,
    __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL - not used anymore
    CONFIG_GENERIC_{SIGALTSTACK,COMPAT_RT_SIG{ACTION,QUEUEINFO,PENDING,PROCMASK}} -
    can be assumed always set.

    Al Viro
     

04 Feb, 2013

3 commits

20 Dec, 2012

1 commit

  • ae903caae   Bury the conditionals from kernel_thread/kernel_execve series ... Browse Code »

    All architectures have
    CONFIG_GENERIC_KERNEL_THREAD
    CONFIG_GENERIC_KERNEL_EXECVE
    __ARCH_WANT_SYS_EXECVE
    None of them have __ARCH_WANT_KERNEL_EXECVE and there are only two callers
    of kernel_execve() (which is a trivial wrapper for do_execve() now) left.
    Kill the conditionals and make both callers use do_execve().

    Signed-off-by: Al Viro

    Al Viro
     

29 Nov, 2012

1 commit

15 Oct, 2012

2 commits