Eric Lee / smarc-fsl-linux-kernel

02 Jun, 2020

1 commit

  • 37744feeb   sh: remove sh5 support ... Browse Code »

    sh5 never became a product and has probably never really worked.

    Remove it by recursively deleting all associated Kconfig options
    and all corresponding files.

    Reviewed-by: Geert Uytterhoeven
    Signed-off-by: Arnd Bergmann
    Signed-off-by: Rich Felker

    Arnd Bergmann
     

02 Aug, 2018

1 commit

  • 06ec64b84   Kconfig: consolidate the "Kernel hacking" menu ... Browse Code »

    Move the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug to
    the top-level Kconfig. For two architectures that means moving their
    arch-specific symbols in that menu into a new arch Kconfig.debug file,
    and for a few more creating a dummy file so that we can include it
    unconditionally.

    Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, where
    it belongs.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Masahiro Yamada

    Christoph Hellwig
     

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
     

30 Mar, 2012

1 commit

  • da47f4a31   sh: dwarf unwinder depends on SHcompact. ... Browse Code »

    Presently there's no SHmedia support plugged in for the dwarf unwinder.
    While it's trivial to provide an SHmedia version of dwarf_read_arch_reg(),
    the general sh64 case is more complicated in that the TLB miss handler
    uses a locked down set of registers for optimization (including the frame
    pointer) which we need for the unwind table generation.

    While freeing up the frame pointer for use in the TLB miss handler is
    reasonably straightforward, it's still more trouble than it's worth, so
    we simply restrict the unwinder to 32-bit for now.

    Signed-off-by: Paul Mundt

    Paul Mundt
     

25 May, 2011

1 commit

  • 5ca43f6c3   lib: consolidate DEBUG_STACK_USAGE option ... Browse Code »

    Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way. Move it
    to lib/Kconfig.debug so each arch doesn't have to define it. This
    obviously makes the option generic, but that's fine because the config is
    already used in generic code.

    It's not obvious to me that sysrq-P actually does anything caution by
    keeping the most inclusive wording.

    Signed-off-by: Stephen Boyd
    Cc: Chris Metcalf
    Acked-by: David S. Miller
    Acked-by: Richard Weinberger
    Acked-by: Mike Frysinger
    Cc: Russell King
    Cc: Hirokazu Takata
    Acked-by: Ralf Baechle
    Cc: Paul Mackerras
    Acked-by: Benjamin Herrenschmidt
    Cc: Chen Liqin
    Cc: Lennox Wu
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Stephen Boyd
     

31 Mar, 2011

1 commit

15 Dec, 2009

1 commit

  • e76fe5744   sh: Remove old early serial console code V2 ... Browse Code »

    Now when the sh-sci driver can do early serial output,
    get rid of the old duplicated code. This patch is V2 and
    removes support for "earlyprintk=serial" together with
    the following kconfig options:
    CONFIG_EARLY_SCIF_CONSOLE
    CONFIG_EARLY_SCIF_CONSOLE_PORT
    CONFIG_EARLY_PRINTK

    With this patch applied "earlyprintk=" support is always
    built-in the SuperH kernel. For this to work the serial
    driver must have early platform support and in the case
    of sh-sci the serial console needs to be enabled:
    CONFIG_SERIAL_SH_SCI_CONSOLE=y

    So after enabling the SuperH SCI console kconfig option
    you also need to point out port using the kernel command
    line: "earlyprintk=sh-sci.N[,baudrate][,keep]"

    Remember that clocks may be disabled by the boot loader
    so you may have to do some board specific static clock
    setup before earlyprintk will work on your platform.

    Signed-off-by: Magnus Damm
    Signed-off-by: Paul Mundt

    Magnus Damm
     

21 Aug, 2009

1 commit

14 Aug, 2009

1 commit

  • bd353861c   sh: dwarf unwinder support. ... Browse Code »

    This is a first cut at a generic DWARF unwinder for the kernel. It's
    still lacking DWARF64 support and the DWARF expression support hasn't
    been tested very well but it is generating proper stacktraces on SH for
    WARN_ON() and NULL dereferences.

    Signed-off-by: Matt Fleming
    Signed-off-by: Paul Mundt

    Matt Fleming
     

04 Aug, 2009

1 commit

29 Jul, 2009

1 commit

  • fd78a76ae   sh: Rework irqflags tracing to fix up CONFIG_PROVE_LOCKING. ... Browse Code »

    This cleans up the irqflags tracing code quite a bit and ties it
    in to various missing callsites that caused an imbalance when
    CONFIG_PROVE_LOCKING was enabled.

    Previously this was catching on:

    987 #ifdef CONFIG_PROVE_LOCKING
    988 DEBUG_LOCKS_WARN_ON(!p->hardirqs_enabled);
    989 DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
    990 #endif
    991 retval = -EAGAIN;

    with hardirqs being doubly enabled, and subsequently bailing out
    with the following call trace:

    Call trace:
    [] __lock_acquire+0x616/0x6a6
    [] do_fork+0xf8/0x2b0
    [] trace_hardirqs_on_caller+0xd4/0x114
    [] _spin_unlock_irq+0x20/0x64
    [] __lock_acquire+0x616/0x6a6
    [] kernel_thread+0x48/0x70
    [] ____call_usermodehelper+0x0/0x110
    [] ____call_usermodehelper+0x0/0x110
    [] kernel_thread_helper+0x0/0x14
    [] __call_usermodehelper+0x38/0x70
    [] worker_thread+0x150/0x274
    [] lock_release+0x0/0x198
    [] __call_usermodehelper+0x0/0x70
    [] autoremove_wake_function+0x0/0x30
    [] kthread+0x3e/0x70
    [] worker_thread+0x0/0x274
    [] kernel_thread_helper+0x8/0x14
    [] kthread+0x0/0x70
    [] kernel_thread_helper+0x0/0x14

    Reported-by: Nobuhiro Iwamatsu
    Signed-off-by: Stuart Menefy
    Signed-off-by: Matt Fleming
    Signed-off-by: Paul Mundt

    Stuart Menefy
     

11 Jul, 2009

3 commits

  • 9f14b84af   sh: Replace DEBUG_STACKOVERFLOW with STACK_DEBUG. ... Browse Code »

    STACK_DEBUG ties in to mcount in order to do function-granular stack
    overflow checks as opposed to lazily checking from IRQ context. As the
    default is nohz, the frequency of overflow checking is too irregular to
    catch much useful information, and so the mcount approach employed by
    sparc64 is adopted instead.

    This kills off the old check entirely from the do_IRQ() path and now
    adopts CONFIG_MCOUNT instead.

    Signed-off-by: Paul Mundt

    Paul Mundt
     
  • 473d1cf4e   sh: Decouple mcount from ftrace. ... Browse Code »

    This adds a general CONFIG_MCOUNT in order to permit mcount generation
    without ftrace support. This is primarily for allowing platforms to
    enable aggressive stack overflow checking without having to enable ftrace
    support. Based on the sparc64 implementation.

    Signed-off-by: Paul Mundt

    Paul Mundt
     
  • b99610fb9   sh: Provide diagnostic kernel stack checks ... Browse Code »

    Enable kernel stack checking code in both the dynamic ftrace and mcount
    code paths. Check the stack to see if it's overflowing and make sure
    that the stack pointer contains an address that's either in init_stack
    or after the bss.

    Signed-off-by: Matt Fleming
    Signed-off-by: Paul Mundt

    Matt Fleming
     

25 Jun, 2009

1 commit

16 Jun, 2009

1 commit

08 May, 2009

3 commits

07 May, 2009

1 commit

22 Dec, 2008

5 commits

20 Sep, 2008

1 commit

  • b817f7e02   sh: Disable 4kB stacks when using PAGE_SIZE_64KB. ... Browse Code »

    This combination triggers a divide by zero in kernel/fork.c when
    calculating the initial max_threads value:

    max_threads = mempages / (8 * THREAD_SIZE / PAGE_SIZE);

    Simply disable 4K stacks on 64kB PAGE_SIZE to work around this,
    as it's not a terribly useful combination to begin with.

    Signed-off-by: Paul Mundt

    Paul Mundt
     

04 Aug, 2008

1 commit

28 Jul, 2008

1 commit

02 Jun, 2008

1 commit

08 May, 2008

1 commit

19 Apr, 2008

1 commit

14 Feb, 2008

3 commits

28 Jan, 2008

6 commits