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
     

01 Jul, 2017

1 commit

  • 07c75d7a6   drivers: dma-mapping: allow dma_common_mmap() for NOMMU ... Browse Code »

    Currently, internals of dma_common_mmap() is compiled out if build is
    done for either NOMMU or target which explicitly says it does not
    have/want coherent DMA mmap. It turned out that dma_common_mmap() can
    be handy in NOMMU setup (at least for ARM).

    This patch converts exitent NOMMU targets to use ARCH_NO_COHERENT_DMA_MMAP,
    thus when CONFIG_MMU is gone from dma_common_mmap() their behaviour stays
    unchanged.

    ARM is not converted to ARCH_NO_COHERENT_DMA_MMAP because it 1)
    already has mmap callback which can handle (at some extent) NOMMU 2)
    already defines dummy pgprot_noncached() for NOMMU build.

    c6x and frv stay untouched since they already have ARCH_NO_COHERENT_DMA_MMAP.

    Cc: Steven Miao
    Cc: Geert Uytterhoeven
    Cc: Michal Simek
    Cc: Yoshinori Sato
    Cc: Rich Felker
    Cc: Chris Zankel
    Cc: Max Filippov
    Suggested-by: Christoph Hellwig
    Signed-off-by: Vladimir Murzin
    Tested-by: Benjamin Gaignard

    Vladimir Murzin
     

05 Aug, 2016

2 commits

  • b4214e41b   sh: add SMP support for J2 ... Browse Code »

    Support is hooked up via a cpu start method specified in the device
    tree, and also depends on DT nodes that describe the interfaces for
    performing IPI and identifying which cpu execution is taking place on.
    The currently used method is a form of spin table, where secondary
    cpus are unblocked by writing to a special address.

    Signed-off-by: Rich Felker

    Rich Felker
     
  • 5a846abad   sh: add support for J-Core J2 processor ... Browse Code »

    At the CPU/ISA level, the J2 is compatible with SH-2, and thus the
    changes to add J2 support build on existing SH-2 support. However, J2
    does not duplicate the memory-mapped SH-2 features like the cache
    interface. Instead, the cache interfaces is described in the device
    tree, and new code is added to be able to access the flat device tree
    at early boot before it is unflattened.

    Support is also added for receiving interrupts on trap numbers in the
    range 16 to 31, since the J-Core aic1 interrupt controller generates
    these traps. This range was unused but nominally for hardware
    exceptions on SH-2, and a few values in this range were used for
    exceptions on SH-2A, but SH-2A has its own version of the relevant
    code.

    No individual cpu subtypes are added for J2 since the intent moving
    forward is to represent SoCs with device tree rather than as
    hard-coded subtypes in the kernel. The CPU_SUBTYPE_J2 Kconfig item
    exists only to fit into the existing cpu selection mechanism until it
    is overhauled.

    Signed-off-by: Rich Felker

    Rich Felker
     

31 Jul, 2016

3 commits

08 Jun, 2016

1 commit

  • fdcfdfa1b   sh: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB ... Browse Code »

    This replaces:

    - "select ARCH_REQUIRE_GPIOLIB" with "select GPIOLIB" as this can
    now be selected directly.

    - "select ARCH_WANT_OPTIONAL_GPIOLIB" with no dependency: GPIOLIB
    is now selectable by everyone, so we need not declare our
    intent to select it.

    When ordering the symbols the following rationale was used:
    if the selects were in alphabetical order, I moved select GPIOLIB
    to be in alphabetical order, but if the selects were not
    maintained in alphabetical order, I just replaced
    "select ARCH_REQUIRE_GPIOLIB" with "select GPIOLIB".

    Cc: Michael Büsch
    Cc: Yoshinori Sato
    Cc: Rich Felker
    Cc: linux-sh@vger.kernel.org
    Signed-off-by: Linus Walleij

    Linus Walleij
     

21 May, 2016

3 commits

  • fff7fb0b2   lib/GCD.c: use binary GCD algorithm instead of Euclidean ... Browse Code »

    The binary GCD algorithm is based on the following facts:
    1. If a and b are all evens, then gcd(a,b) = 2 * gcd(a/2, b/2)
    2. If a is even and b is odd, then gcd(a,b) = gcd(a/2, b)
    3. If a and b are all odds, then gcd(a,b) = gcd((a-b)/2, b) = gcd((a+b)/2, b)

    Even on x86 machines with reasonable division hardware, the binary
    algorithm runs about 25% faster (80% the execution time) than the
    division-based Euclidian algorithm.

    On platforms like Alpha and ARMv6 where division is a function call to
    emulation code, it's even more significant.

    There are two variants of the code here, depending on whether a fast
    __ffs (find least significant set bit) instruction is available. This
    allows the unpredictable branches in the bit-at-a-time shifting loop to
    be eliminated.

    If fast __ffs is not available, the "even/odd" GCD variant is used.

    I use the following code to benchmark:

    #include
    #include
    #include
    #include
    #include
    #include

    #define swap(a, b) \
    do { \
    a ^= b; \
    b ^= a; \
    a ^= b; \
    } while (0)

    unsigned long gcd0(unsigned long a, unsigned long b)
    {
    unsigned long r;

    if (a < b) {
    swap(a, b);
    }

    if (b == 0)
    return a;

    while ((r = a % b) != 0) {
    a = b;
    b = r;
    }

    return b;
    }

    unsigned long gcd1(unsigned long a, unsigned long b)
    {
    unsigned long r = a | b;

    if (!a || !b)
    return r;

    b >>= __builtin_ctzl(b);

    for (;;) {
    a >>= __builtin_ctzl(a);
    if (a == b)
    return a << __builtin_ctzl(r);

    if (a < b)
    swap(a, b);
    a -= b;
    }
    }

    unsigned long gcd2(unsigned long a, unsigned long b)
    {
    unsigned long r = a | b;

    if (!a || !b)
    return r;

    r &= -r;

    while (!(b & r))
    b >>= 1;

    for (;;) {
    while (!(a & r))
    a >>= 1;
    if (a == b)
    return a;

    if (a < b)
    swap(a, b);
    a -= b;
    a >>= 1;
    if (a & r)
    a += b;
    a >>= 1;
    }
    }

    unsigned long gcd3(unsigned long a, unsigned long b)
    {
    unsigned long r = a | b;

    if (!a || !b)
    return r;

    b >>= __builtin_ctzl(b);
    if (b == 1)
    return r & -r;

    for (;;) {
    a >>= __builtin_ctzl(a);
    if (a == 1)
    return r & -r;
    if (a == b)
    return a << __builtin_ctzl(r);

    if (a < b)
    swap(a, b);
    a -= b;
    }
    }

    unsigned long gcd4(unsigned long a, unsigned long b)
    {
    unsigned long r = a | b;

    if (!a || !b)
    return r;

    r &= -r;

    while (!(b & r))
    b >>= 1;
    if (b == r)
    return r;

    for (;;) {
    while (!(a & r))
    a >>= 1;
    if (a == r)
    return r;
    if (a == b)
    return a;

    if (a < b)
    swap(a, b);
    a -= b;
    a >>= 1;
    if (a & r)
    a += b;
    a >>= 1;
    }
    }

    static unsigned long (*gcd_func[])(unsigned long a, unsigned long b) = {
    gcd0, gcd1, gcd2, gcd3, gcd4,
    };

    #define TEST_ENTRIES (sizeof(gcd_func) / sizeof(gcd_func[0]))

    #if defined(__x86_64__)

    #define rdtscll(val) do { \
    unsigned long __a,__d; \
    __asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \
    (val) = ((unsigned long long)__a) | (((unsigned long long)__d)<= start)
    ret = end - start;
    else
    ret = ~0ULL - start + 1 + end;

    *res = gcd_res;
    return ret;
    }

    #else

    static inline struct timespec read_time(void)
    {
    struct timespec time;
    clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time);
    return time;
    }

    static inline unsigned long long diff_time(struct timespec start, struct timespec end)
    {
    struct timespec temp;

    if ((end.tv_nsec - start.tv_nsec) < 0) {
    temp.tv_sec = end.tv_sec - start.tv_sec - 1;
    temp.tv_nsec = 1000000000ULL + end.tv_nsec - start.tv_nsec;
    } else {
    temp.tv_sec = end.tv_sec - start.tv_sec;
    temp.tv_nsec = end.tv_nsec - start.tv_nsec;
    }

    return temp.tv_sec * 1000000000ULL + temp.tv_nsec;
    }

    static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
    unsigned long a, unsigned long b, unsigned long *res)
    {
    struct timespec start, end;
    unsigned long gcd_res;

    start = read_time();
    gcd_res = gcd(a, b);
    end = read_time();

    *res = gcd_res;
    return diff_time(start, end);
    }

    #endif

    static inline unsigned long get_rand()
    {
    if (sizeof(long) == 8)
    return (unsigned long)rand() << 32 | rand();
    else
    return rand();
    }

    int main(int argc, char **argv)
    {
    unsigned int seed = time(0);
    int loops = 100;
    int repeats = 1000;
    unsigned long (*res)[TEST_ENTRIES];
    unsigned long long elapsed[TEST_ENTRIES];
    int i, j, k;

    for (;;) {
    int opt = getopt(argc, argv, "n:r:s:");
    /* End condition always first */
    if (opt == -1)
    break;

    switch (opt) {
    case 'n':
    loops = atoi(optarg);
    break;
    case 'r':
    repeats = atoi(optarg);
    break;
    case 's':
    seed = strtoul(optarg, NULL, 10);
    break;
    default:
    /* You won't actually get here. */
    break;
    }
    }

    res = malloc(sizeof(unsigned long) * TEST_ENTRIES * loops);
    memset(elapsed, 0, sizeof(elapsed));

    srand(seed);
    for (j = 0; j < loops; j++) {
    unsigned long a = get_rand();
    /* Do we have args? */
    unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
    unsigned long long min_elapsed[TEST_ENTRIES];
    for (k = 0; k < repeats; k++) {
    for (i = 0; i < TEST_ENTRIES; i++) {
    unsigned long long tmp = benchmark_gcd_func(gcd_func[i], a, b, &res[j][i]);
    if (k == 0 || min_elapsed[i] > tmp)
    min_elapsed[i] = tmp;
    }
    }
    for (i = 0; i < TEST_ENTRIES; i++)
    elapsed[i] += min_elapsed[i];
    }

    for (i = 0; i < TEST_ENTRIES; i++)
    printf("gcd%d: elapsed %llu\n", i, elapsed[i]);

    k = 0;
    srand(seed);
    for (j = 0; j < loops; j++) {
    unsigned long a = get_rand();
    unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
    for (i = 1; i < TEST_ENTRIES; i++) {
    if (res[j][i] != res[j][0])
    break;
    }
    if (i < TEST_ENTRIES) {
    if (k == 0) {
    k = 1;
    fprintf(stderr, "Error:\n");
    }
    fprintf(stderr, "gcd(%lu, %lu): ", a, b);
    for (i = 0; i < TEST_ENTRIES; i++)
    fprintf(stderr, "%ld%s", res[j][i], i < TEST_ENTRIES - 1 ? ", " : "\n");
    }
    }

    if (k == 0)
    fprintf(stderr, "PASS\n");

    free(res);

    return 0;
    }

    Compiled with "-O2", on "VirtualBox 4.4.0-22-generic #38-Ubuntu x86_64" got:

    zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
    gcd0: elapsed 10174
    gcd1: elapsed 2120
    gcd2: elapsed 2902
    gcd3: elapsed 2039
    gcd4: elapsed 2812
    PASS
    zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
    gcd0: elapsed 9309
    gcd1: elapsed 2280
    gcd2: elapsed 2822
    gcd3: elapsed 2217
    gcd4: elapsed 2710
    PASS
    zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
    gcd0: elapsed 9589
    gcd1: elapsed 2098
    gcd2: elapsed 2815
    gcd3: elapsed 2030
    gcd4: elapsed 2718
    PASS
    zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
    gcd0: elapsed 9914
    gcd1: elapsed 2309
    gcd2: elapsed 2779
    gcd3: elapsed 2228
    gcd4: elapsed 2709
    PASS

    [akpm@linux-foundation.org: avoid #defining a CONFIG_ variable]
    Signed-off-by: Zhaoxiu Zeng
    Signed-off-by: George Spelvin
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Zhaoxiu Zeng
     
  • 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
     

20 Mar, 2016

1 commit

  • b31a3bc3d   Merge tag 'tag-sh-for-4.6' of git://git.libc.org/linux-sh ... Browse Code »

    Pull arch/sh updates from Rich Felker:
    "This includes minor cleanups, a fix for a crash that likely affects
    all sh models with MMU, and introduction of a framework for boards
    described by device tree, which sets the stage for future J2 support"

    * tag 'tag-sh-for-4.6' of git://git.libc.org/linux-sh:
    sched/preempt, sh: kmap_coherent relies on disabled preemption
    sh: add SMP method selection to device tree pseudo-board
    sh: add device tree support and generic board using device tree
    sh: remove arch-specific localtimer and use generic one
    sh: make MMU-specific SMP code conditional on CONFIG_MMU
    sh: provide unified syscall trap compatible with all SH models
    sh: New gcc support
    sh: Disable trace for kernel uncompressing.
    sh: Use generic clkdev.h header

    Linus Torvalds
     

18 Mar, 2016

1 commit

09 Mar, 2016

2 commits

  • e7e127e3c   PCI: Include pci/hotplug Kconfig directly from pci/Kconfig ... Browse Code »

    Include pci/hotplug/Kconfig directly from pci/Kconfig, so arches don't
    have to source both pci/Kconfig and pci/hotplug/Kconfig.

    Note that this effectively adds pci/hotplug/Kconfig to the following
    arches, because they already sourced drivers/pci/Kconfig but they
    previously did not source drivers/pci/hotplug/Kconfig:

    alpha
    arm
    avr32
    frv
    m68k
    microblaze
    mn10300
    sparc
    unicore32

    Inspired-by-patch-from: Bogicevic Sasa
    Signed-off-by: Bjorn Helgaas

    Bjorn Helgaas
     
  • 5f8fc4321   PCI: Include pci/pcie/Kconfig directly from pci/Kconfig ... Browse Code »

    Include pci/pcie/Kconfig directly from pci/Kconfig, so arches don't
    have to source both pci/Kconfig and pci/pcie/Kconfig.

    Note that this effectively adds pci/pcie/Kconfig to the following
    arches, because they already sourced drivers/pci/Kconfig but they
    previously did not source drivers/pci/pcie/Kconfig:

    alpha
    avr32
    blackfin
    frv
    m32r
    m68k
    microblaze
    mn10300
    parisc
    sparc
    unicore32
    xtensa

    [bhelgaas: changelog, source pci/pcie/Kconfig at top of pci/Kconfig, whitespace]
    Signed-off-by: Sasa Bogicevic
    Signed-off-by: Bjorn Helgaas

    Bogicevic Sasa
     

21 Jan, 2016

1 commit

  • e1c7e3245   dma-mapping: always provide the dma_map_ops based implementation ... Browse Code »

    Move the generic implementation to now that all
    architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
    that everyone supports them.

    [valentinrothberg@gmail.com: remove leftovers in Kconfig]
    Signed-off-by: Christoph Hellwig
    Cc: "David S. Miller"
    Cc: Aurelien Jacquiot
    Cc: Chris Metcalf
    Cc: David Howells
    Cc: Geert Uytterhoeven
    Cc: Haavard Skinnemoen
    Cc: Hans-Christian Egtvedt
    Cc: Helge Deller
    Cc: James Hogan
    Cc: Jesper Nilsson
    Cc: Koichi Yasutake
    Cc: Ley Foon Tan
    Cc: Mark Salter
    Cc: Mikael Starvik
    Cc: Steven Miao
    Cc: Vineet Gupta
    Cc: Christian Borntraeger
    Cc: Joerg Roedel
    Cc: Sebastian Ott
    Signed-off-by: Valentin Rothberg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig
     

17 Jan, 2016

1 commit

  • da48d094c   Kconfig: remove HAVE_LATENCYTOP_SUPPORT ... Browse Code »

    As illustrated by commit a3afe70b83fd ("[S390] latencytop s390
    support."), HAVE_LATENCYTOP_SUPPORT is defined by an architecture to
    advertise an implementation of save_stack_trace_tsk.

    However, as of 9212ddb5eada ("stacktrace: provide save_stack_trace_tsk()
    weak alias") a dummy implementation is provided if STACKTRACE=y. Given
    that LATENCYTOP already depends on STACKTRACE_SUPPORT and selects
    STACKTRACE, we can remove HAVE_LATENCYTOP_SUPPORT altogether.

    Signed-off-by: Will Deacon
    Acked-by: Heiko Carstens
    Cc: Vineet Gupta
    Cc: Russell King
    Cc: James Hogan
    Cc: Michal Simek
    Cc: Helge Deller
    Acked-by: Michael Ellerman
    Cc: "David S. Miller"
    Cc: Guan Xuetao
    Cc: Ingo Molnar
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Will Deacon
     

11 Sep, 2015

1 commit

  • 2965faa5e   kexec: split kexec_load syscall from kexec core code ... Browse Code »

    There are two kexec load syscalls, kexec_load another and kexec_file_load.
    kexec_file_load has been splited as kernel/kexec_file.c. In this patch I
    split kexec_load syscall code to kernel/kexec.c.

    And add a new kconfig option KEXEC_CORE, so we can disable kexec_load and
    use kexec_file_load only, or vice verse.

    The original requirement is from Ted Ts'o, he want kexec kernel signature
    being checked with CONFIG_KEXEC_VERIFY_SIG enabled. But kexec-tools use
    kexec_load syscall can bypass the checking.

    Vivek Goyal proposed to create a common kconfig option so user can compile
    in only one syscall for loading kexec kernel. KEXEC/KEXEC_FILE selects
    KEXEC_CORE so that old config files still work.

    Because there's general code need CONFIG_KEXEC_CORE, so I updated all the
    architecture Kconfig with a new option KEXEC_CORE, and let KEXEC selects
    KEXEC_CORE in arch Kconfig. Also updated general kernel code with to
    kexec_load syscall.

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: Dave Young
    Cc: Eric W. Biederman
    Cc: Vivek Goyal
    Cc: Petr Tesarik
    Cc: Theodore Ts'o
    Cc: Josh Boyer
    Cc: David Howells
    Cc: Geert Uytterhoeven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dave Young
     

15 Apr, 2015

1 commit

11 Feb, 2015

1 commit

20 Dec, 2014

1 commit

  • 464ed18eb   PM: Eliminate CONFIG_PM_RUNTIME ... Browse Code »

    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
    Reviewed-by: Ulf Hansson
    Acked-by: Kevin Hilman

    Rafael J. Wysocki
     

14 Dec, 2014

1 commit

  • 957e3facd   gcov: enable GCOV_PROFILE_ALL from ARCH Kconfigs ... Browse Code »

    Following the suggestions from Andrew Morton and Stephen Rothwell,
    Dont expand the ARCH list in kernel/gcov/Kconfig. Instead,
    define a ARCH_HAS_GCOV_PROFILE_ALL bool which architectures
    can enable.

    set ARCH_HAS_GCOV_PROFILE_ALL on Architectures where it was
    previously allowed + ARM64 which I tested.

    Signed-off-by: Riku Voipio
    Cc: Peter Oberparleiter
    Cc: Stephen Rothwell
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Riku Voipio
     

04 Dec, 2014

1 commit

  • a1518d3bb   PM / Kconfig: Do not select PM directly from Kconfig files ... Browse Code »

    It is not valid to select CONFIG_PM directly without selecting
    CONFIG_PM_SLEEP or CONFIG_PM_RUNTIME too, because that breaks
    dependencies (ia64 does that) and it is not necessary to select
    CONFIG_PM directly if CONFIG_PM_SLEEP or CONFIG_PM_RUNTIME is
    selected, because CONFIG_PM will be set automatically in that
    case (sh does that).

    Fix those mistakes.

    Acked-by: Geert Uytterhoeven
    Reviewed-by: Kevin Hilman
    Signed-off-by: Rafael J. Wysocki

    Rafael J. Wysocki
     

30 Aug, 2014

1 commit

  • b41d34b46   kexec: remove CONFIG_KEXEC dependency on crypto ... Browse Code »

    New system call depends on crypto. As it did not have a separate config
    option, CONFIG_KEXEC was modified to select CRYPTO and CRYPTO_SHA256.

    But now previous patch introduced a new config option for new syscall.
    So CONFIG_KEXEC does not require crypto. Remove that dependency.

    Signed-off-by: Vivek Goyal
    Cc: Eric Biederman
    Cc: H. Peter Anvin
    Cc: Shaun Ruffell
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vivek Goyal
     

22 Aug, 2014

1 commit

  • 049d28048   sh: intc: Confine SH_INTC to platforms that need it ... Browse Code »

    Currently the sh-intc driver is compiled on all SuperH and
    non-multiplatform SH-Mobile platforms, while it's only used on a limited
    number of platforms:
    - SuperH: SH2(A), SH3(A), SH4(A)(L) (all but SH5)
    - ARM: sh7372, sh73a0

    Drop the "default y" on SH_INTC, make all CPU platforms that use it
    select it, and protect all sub-options by "if SH_INTC" to fix this.

    Signed-off-by: Geert Uytterhoeven
    Acked-by: Magnus Damm
    Signed-off-by: Simon Horman

    Geert Uytterhoeven
     

09 Aug, 2014

1 commit

  • 12db5562e   kexec: load and relocate purgatory at kernel load time ... Browse Code »

    Load purgatory code in RAM and relocate it based on the location.
    Relocation code has been inspired by module relocation code and purgatory
    relocation code in kexec-tools.

    Also compute the checksums of loaded kexec segments and store them in
    purgatory.

    Arch independent code provides this functionality so that arch dependent
    bootloaders can make use of it.

    Helper functions are provided to get/set symbol values in purgatory which
    are used by bootloaders later to set things like stack and entry point of
    second kernel etc.

    Signed-off-by: Vivek Goyal
    Cc: Borislav Petkov
    Cc: Michael Kerrisk
    Cc: Yinghai Lu
    Cc: Eric Biederman
    Cc: H. Peter Anvin
    Cc: Matthew Garrett
    Cc: Greg Kroah-Hartman
    Cc: Dave Young
    Cc: WANG Chao
    Cc: Baoquan He
    Cc: Andy Lutomirski
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vivek Goyal
     

19 Jul, 2014

1 commit

13 Apr, 2014

1 commit

  • 0b747172d   Merge git://git.infradead.org/users/eparis/audit ... Browse Code »

    Pull audit updates from Eric Paris.

    * git://git.infradead.org/users/eparis/audit: (28 commits)
    AUDIT: make audit_is_compat depend on CONFIG_AUDIT_COMPAT_GENERIC
    audit: renumber AUDIT_FEATURE_CHANGE into the 1300 range
    audit: do not cast audit_rule_data pointers pointlesly
    AUDIT: Allow login in non-init namespaces
    audit: define audit_is_compat in kernel internal header
    kernel: Use RCU_INIT_POINTER(x, NULL) in audit.c
    sched: declare pid_alive as inline
    audit: use uapi/linux/audit.h for AUDIT_ARCH declarations
    syscall_get_arch: remove useless function arguments
    audit: remove stray newline from audit_log_execve_info() audit_panic() call
    audit: remove stray newlines from audit_log_lost messages
    audit: include subject in login records
    audit: remove superfluous new- prefix in AUDIT_LOGIN messages
    audit: allow user processes to log from another PID namespace
    audit: anchor all pid references in the initial pid namespace
    audit: convert PPIDs to the inital PID namespace.
    pid: get pid_t ppid of task in init_pid_ns
    audit: rename the misleading audit_get_context() to audit_take_context()
    audit: Add generic compat syscall support
    audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL
    ...

    Linus Torvalds
     

08 Apr, 2014

1 commit

  • 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
     

02 Apr, 2014

1 commit

  • 3e75c6de1   Merge tag 'usb-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb ... Browse Code »

    Pull USB patches from Greg KH:
    "Here's the big USB pull request for 3.15-rc1.

    The normal set of patches, lots of controller driver updates, and a
    smattering of individual USB driver updates as well.

    All have been in linux-next for a while"

    * tag 'usb-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (249 commits)
    xhci: Transition maintainership to Mathias Nyman.
    USB: disable reset-resume when USB_QUIRK_RESET is set
    USB: unbind all interfaces before rebinding any
    usb: phy: Add ulpi IDs for SMSC USB3320 and TI TUSB1210
    usb: gadget: tcm_usb_gadget: stop format strings
    usb: gadget: f_fs: add missing spinlock and mutex unlock
    usb: gadget: composite: switch over to ERR_CAST()
    usb: gadget: inode: switch over to memdup_user()
    usb: gadget: f_subset: switch over to PTR_RET
    usb: gadget: lpc32xx_udc: fix wrong clk_put() sequence
    USB: keyspan: remove dead debugging code
    USB: serial: add missing newlines to dev_ messages.
    USB: serial: add missing braces
    USB: serial: continue to write on errors
    USB: serial: continue to read on errors
    USB: serial: make bulk_out_size a lower limit
    USB: cypress_m8: fix potential scheduling while atomic
    devicetree: bindings: document lsi,zevio-usb
    usb: chipidea: add support for USB OTG controller on LSI Zevio SoCs
    usb: chipidea: imx: Use dev_name() for ci_hdrc name to distinguish USBs
    ...

    Linus Torvalds
     

20 Mar, 2014

1 commit

  • 7a0177212   audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL ... Browse Code »

    Currently AUDITSYSCALL has a long list of architecture depencency:
    depends on AUDIT && (X86 || PARISC || PPC || S390 || IA64 || UML ||
    SPARC64 || SUPERH || (ARM && AEABI && !OABI_COMPAT) || ALPHA)
    The purpose of this patch is to replace it with HAVE_ARCH_AUDITSYSCALL
    for simplicity.

    Signed-off-by: AKASHI Takahiro
    Acked-by: Will Deacon (arm)
    Acked-by: Richard Guy Briggs (audit)
    Acked-by: Matt Turner (alpha)
    Acked-by: Michael Ellerman (powerpc)
    Signed-off-by: Eric Paris

    AKASHI Takahiro
     

12 Mar, 2014

1 commit

19 Feb, 2014

1 commit

24 Jan, 2014

1 commit

  • 4a4741577   Kconfig: update flightly outdated CONFIG_SMP documentation ... Browse Code »

    Remove an outdated reference to "most personal computers" having only one
    CPU, and change the use of "singleprocessor" and "single processor" in
    CONFIG_SMP's documentation to "uniprocessor" across all arches where that
    documentation is present.

    Signed-off-by: Robert Graffham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Robert Graffham
     

20 Dec, 2013

1 commit

  • 19952a920   stackprotector: Unify the HAVE_CC_STACKPROTECTOR logic between architectures ... Browse Code »

    Instead of duplicating the CC_STACKPROTECTOR Kconfig and
    Makefile logic in each architecture, switch to using
    HAVE_CC_STACKPROTECTOR and keep everything in one place. This
    retains the x86-specific bug verification scripts.

    Signed-off-by: Kees Cook
    Cc: Arjan van de Ven
    Cc: Michal Marek
    Cc: Russell King
    Cc: Ralf Baechle
    Cc: Paul Mundt
    Cc: James Hogan
    Cc: Stephen Rothwell
    Cc: Shawn Guo
    Cc: Linus Torvalds
    Cc: Andrew Morton
    Cc: Peter Zijlstra
    Cc: Thomas Gleixner
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: linux-mips@linux-mips.org
    Cc: linux-arch@vger.kernel.org
    Link: http://lkml.kernel.org/r/1387481759-14535-2-git-send-email-keescook@chromium.org
    Signed-off-by: Ingo Molnar

    Kees Cook
     

16 Nov, 2013

1 commit

  • f13399f03   Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming ... Browse Code »

    Pull Kconfig cleanups from Mark Salter:
    "Remove some unused config options from C6X and clean up PC_PARPORT
    dependencies. The latter was discussed here:

    https://lkml.org/lkml/2013/10/8/12"

    * tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
    c6x: remove unused COMMON_CLKDEV Kconfig parameter
    Kconfig cleanup (PARPORT_PC dependencies)
    x86: select ARCH_MIGHT_HAVE_PC_PARPORT
    unicore32: select ARCH_MIGHT_HAVE_PC_PARPORT
    sparc: select ARCH_MIGHT_HAVE_PC_PARPORT
    sh: select ARCH_MIGHT_HAVE_PC_PARPORT
    powerpc: select ARCH_MIGHT_HAVE_PC_PARPORT
    parisc: select ARCH_MIGHT_HAVE_PC_PARPORT
    mips: select ARCH_MIGHT_HAVE_PC_PARPORT
    microblaze: select ARCH_MIGHT_HAVE_PC_PARPORT
    m68k: select ARCH_MIGHT_HAVE_PC_PARPORT
    ia64: select ARCH_MIGHT_HAVE_PC_PARPORT
    arm: select ARCH_MIGHT_HAVE_PC_PARPORT
    alpha: select ARCH_MIGHT_HAVE_PC_PARPORT
    c6x: remove unused parameter in Kconfig

    Linus Torvalds
     

15 Nov, 2013

1 commit

24 Oct, 2013

1 commit

13 Sep, 2013

1 commit

23 Aug, 2013

1 commit