Eric Lee / smarc-fsl-linux-kernel

03 Mar, 2018

1 commit

  • 4ebaea9e6   genirq: Guard handle_bad_irq log messages ... Browse Code »

    [ Upstream commit 11bca0a83f83f6093d816295668e74ef24595944 ]

    An interrupt storm on a bad interrupt will cause the kernel
    log to be clogged.

    [ 60.089234] ->handle_irq(): ffffffffbe2f803f,
    [ 60.090455] 0xffffffffbf2af380
    [ 60.090510] handle_bad_irq+0x0/0x2e5
    [ 60.090522] ->irq_data.chip(): ffffffffbf2af380,
    [ 60.090553] IRQ_NOPROBE set
    [ 60.090584] ->handle_irq(): ffffffffbe2f803f,
    [ 60.090590] handle_bad_irq+0x0/0x2e5
    [ 60.090596] ->irq_data.chip(): ffffffffbf2af380,
    [ 60.090602] 0xffffffffbf2af380
    [ 60.090608] ->action(): (null)
    [ 60.090779] handle_bad_irq+0x0/0x2e5

    This was seen when running an upstream kernel on Acer Chromebook R11. The
    system was unstable as result.

    Guard the log message with __printk_ratelimit to reduce the impact. This
    won't prevent the interrupt storm from happening, but at least the system
    remains stable.

    Signed-off-by: Guenter Roeck
    Signed-off-by: Thomas Gleixner
    Cc: Dmitry Torokhov
    Cc: Joe Perches
    Cc: Andy Shevchenko
    Cc: Mika Westerberg
    Link: https://bugzilla.kernel.org/show_bug.cgi?id=197953
    Link: https://lkml.kernel.org/r/1512234784-21038-1-git-send-email-linux@roeck-us.net
    Signed-off-by: Sasha Levin
    Signed-off-by: Greg Kroah-Hartman

    Guenter Roeck
     

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
     

24 Apr, 2012

1 commit

  • 9f3045eca   irq: hide debug macros so they don't collide with others. ... Browse Code »

    The file kernel/irq/debug.h temporarily defines P, PS, PD
    and then undefines them. However these names aren't really
    "internal" enough, and collide with other more legit users
    such as the ones in the xtensa arch, causing:

    In file included from kernel/irq/internals.h:58:0,
    from kernel/irq/irqdesc.c:18:
    kernel/irq/debug.h:8:0: warning: "PS" redefined [enabled by default]
    arch/xtensa/include/asm/regs.h:59:0: note: this is the location of the previous definition

    Add a handful of underscores to do a better job of hiding these
    temporary macros.

    Cc: Thomas Gleixner
    Signed-off-by: Paul Gortmaker

    Paul Gortmaker
     

23 Apr, 2011

1 commit

  • 7f1b1244e   genirq: Support per-IRQ thread disabling. ... Browse Code »

    This adds support for disabling threading on a per-IRQ basis via the IRQ
    status instead of the IRQ flow, which is necessary for interrupts that
    don't follow the natural IRQ flow channels, such as those that are
    virtually created.

    The new APIs added are simply:

    irq_set_thread()
    irq_set_nothread()

    which follow the rest of the IRQ status routines.

    Chained handlers also have IRQ_NOTHREAD set on them automatically, making
    the lack of threading explicit rather than implicit. Subsequently, the
    nothread flag can be viewed through the standard genirq debugging
    facilities.

    [ tglx: Fixed cleanup fallout ]

    Signed-off-by: Paul Mundt
    Link: http://lkml.kernel.org/r/%3C20110406210135.GF18426%40linux-sh.org%3E
    Signed-off-by: Thomas Gleixner

    Paul Mundt
     

29 Mar, 2011

1 commit

28 Mar, 2011

1 commit

19 Feb, 2011

1 commit