Eric Lee / smarc-fsl-linux-kernel

14 Oct, 2008

1 commit

06 Aug, 2008

1 commit

  • 0e25f7106   remove unneeded #include <linux/ide.h>'s ... Browse Code »

    This patch remove unneeded #include 's.

    It also adds a required #include that was previously
    implicitely pulled by ide.h

    Signed-off-by: Adrian Bunk
    [bart: revert change to tests/lkdtm.c (spotted by Stephen Rothwell)]
    Signed-off-by: Bartlomiej Zolnierkiewicz

    Adrian Bunk
     

27 Jul, 2008

2 commits

  • 47221222a   xtensa: use generic show_mem() ... Browse Code »

    Remove arch-specific show_mem() in favor of the generic version.

    This also removes the following redundant information display:

    - free pages, printed by show_free_areas()
    - pages in swapcache, printed by show_swap_cache_info()

    where show_mem() calls show_free_areas(), which calls
    show_swap_cache_info().

    Signed-off-by: Johannes Weiner
    Cc: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Johannes Weiner
     
  • 51cc50685   SL*B: drop kmem cache argument from constructor ... Browse Code »

    Kmem cache passed to constructor is only needed for constructors that are
    themselves multiplexeres. Nobody uses this "feature", nor does anybody uses
    passed kmem cache in non-trivial way, so pass only pointer to object.

    Non-trivial places are:
    arch/powerpc/mm/init_64.c
    arch/powerpc/mm/hugetlbpage.c

    This is flag day, yes.

    Signed-off-by: Alexey Dobriyan
    Acked-by: Pekka Enberg
    Acked-by: Christoph Lameter
    Cc: Jon Tollefson
    Cc: Nick Piggin
    Cc: Matt Mackall
    [akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c]
    [akpm@linux-foundation.org: fix mm/slab.c]
    [akpm@linux-foundation.org: fix ubifs]
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

25 Jul, 2008

2 commits

  • ed8cae8ba   flag parameters: pipe ... Browse Code »

    This patch introduces the new syscall pipe2 which is like pipe but it also
    takes an additional parameter which takes a flag value. This patch implements
    the handling of O_CLOEXEC for the flag. I did not add support for the new
    syscall for the architectures which have a special sys_pipe implementation. I
    think the maintainers of those archs have the chance to go with the unified
    implementation but that's up to them.

    The implementation introduces do_pipe_flags. I did that instead of changing
    all callers of do_pipe because some of the callers are written in assembler.
    I would probably screw up changing the assembly code. To avoid breaking code
    do_pipe is now a small wrapper around do_pipe_flags. Once all callers are
    changed over to do_pipe_flags the old do_pipe function can be removed.

    The following test must be adjusted for architectures other than x86 and
    x86-64 and in case the syscall numbers changed.

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    #include
    #include
    #include
    #include

    #ifndef __NR_pipe2
    # ifdef __x86_64__
    # define __NR_pipe2 293
    # elif defined __i386__
    # define __NR_pipe2 331
    # else
    # error "need __NR_pipe2"
    # endif
    #endif

    int
    main (void)
    {
    int fd[2];
    if (syscall (__NR_pipe2, fd, 0) != 0)
    {
    puts ("pipe2(0) failed");
    return 1;
    }
    for (int i = 0; i < 2; ++i)
    {
    int coe = fcntl (fd[i], F_GETFD);
    if (coe == -1)
    {
    puts ("fcntl failed");
    return 1;
    }
    if (coe & FD_CLOEXEC)
    {
    printf ("pipe2(0) set close-on-exit for fd[%d]\n", i);
    return 1;
    }
    }
    close (fd[0]);
    close (fd[1]);

    if (syscall (__NR_pipe2, fd, O_CLOEXEC) != 0)
    {
    puts ("pipe2(O_CLOEXEC) failed");
    return 1;
    }
    for (int i = 0; i < 2; ++i)
    {
    int coe = fcntl (fd[i], F_GETFD);
    if (coe == -1)
    {
    puts ("fcntl failed");
    return 1;
    }
    if ((coe & FD_CLOEXEC) == 0)
    {
    printf ("pipe2(O_CLOEXEC) does not set close-on-exit for fd[%d]\n", i);
    return 1;
    }
    }
    close (fd[0]);
    close (fd[1]);

    puts ("OK");

    return 0;
    }
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Signed-off-by: Ulrich Drepper
    Acked-by: Davide Libenzi
    Cc: Michael Kerrisk
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ulrich Drepper
     
  • 27ac792ca   PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures ... Browse Code »

    On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit
    boundary. For example:

    u64 val = PAGE_ALIGN(size);

    always returns a value < 4GB even if size is greater than 4GB.

    The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for
    example):

    #define PAGE_SHIFT 12
    #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
    #define PAGE_MASK (~(PAGE_SIZE-1))
    ...
    #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)

    The "~" is performed on a 32-bit value, so everything in "and" with
    PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary.
    Using the ALIGN() macro seems to be the right way, because it uses
    typeof(addr) for the mask.

    Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in
    include/linux/mm.h.

    See also lkml discussion: http://lkml.org/lkml/2008/6/11/237

    [akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c]
    [akpm@linux-foundation.org: fix v850]
    [akpm@linux-foundation.org: fix powerpc]
    [akpm@linux-foundation.org: fix arm]
    [akpm@linux-foundation.org: fix mips]
    [akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c]
    [akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c]
    [akpm@linux-foundation.org: fix powerpc]
    Signed-off-by: Andrea Righi
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrea Righi
     

22 Jul, 2008

1 commit

17 May, 2008

1 commit

29 Apr, 2008

1 commit

17 Apr, 2008

1 commit

  • 64ac24e73   Generic semaphore implementation ... Browse Code »
    46

    Semaphores are no longer performance-critical, so a generic C
    implementation is better for maintainability, debuggability and
    extensibility. Thanks to Peter Zijlstra for fixing the lockdep
    warning. Thanks to Harvey Harrison for pointing out that the
    unlikely() was unnecessary.

    Signed-off-by: Matthew Wilcox
    Acked-by: Ingo Molnar

    Matthew Wilcox
     

14 Feb, 2008

22 commits

09 Feb, 2008

3 commits

  • ec7748b59   ide: introduce HAVE_IDE ... Browse Code »

    To allow flexible configuration of IDE introduce HAVE_IDE.
    All archs except arm, um and s390 unconditionally select it.
    For arm the actual configuration determine if IDE is supported.

    This is a step towards introducing drivers/Kconfig for arm.

    Signed-off-by: Sam Ravnborg
    Acked-by: Russell King - ARM Linux
    Acked-by: Bartlomiej Zolnierkiewicz

    Sam Ravnborg
     
  • bdc807871   avoid overflows in kernel/time.c ... Browse Code »

    When the conversion factor between jiffies and milli- or microseconds is
    not a single multiply or divide, as for the case of HZ == 300, we currently
    do a multiply followed by a divide. The intervening result, however, is
    subject to overflows, especially since the fraction is not simplified (for
    HZ == 300, we multiply by 300 and divide by 1000).

    This is exposed to the user when passing a large timeout to poll(), for
    example.

    This patch replaces the multiply-divide with a reciprocal multiplication on
    32-bit platforms. When the input is an unsigned long, there is no portable
    way to do this on 64-bit platforms there is no portable way to do this
    since it requires a 128-bit intermediate result (which gcc does support on
    64-bit platforms but may generate libgcc calls, e.g. on 64-bit s390), but
    since the output is a 32-bit integer in the cases affected, just simplify
    the multiply-divide (*3/10 instead of *300/1000).

    The reciprocal multiply used can have off-by-one errors in the upper half
    of the valid output range. This could be avoided at the expense of having
    to deal with a potential 65-bit intermediate result. Since the intent is
    to avoid overflow problems and most of the other time conversions are only
    semiexact, the off-by-one errors were considered an acceptable tradeoff.

    At Ralf Baechle's suggestion, this version uses a Perl script to compute
    the necessary constants. We already have dependencies on Perl for kernel
    compiles. This does, however, require the Perl module Math::BigInt, which
    is included in the standard Perl distribution starting with version 5.8.0.
    In order to support older versions of Perl, include a table of canned
    constants in the script itself, and structure the script so that
    Math::BigInt isn't required if pulling values from said table.

    Running the script requires that the HZ value is available from the
    Makefile. Thus, this patch also adds the Kconfig variable CONFIG_HZ to the
    architectures which didn't already have it (alpha, cris, frv, h8300, m32r,
    m68k, m68knommu, sparc, v850, and xtensa.) It does *not* touch the sh or
    sh64 architectures, since Paul Mundt has dealt with those separately in the
    sh tree.

    Signed-off-by: H. Peter Anvin
    Cc: Ralf Baechle ,
    Cc: Sam Ravnborg ,
    Cc: Paul Mundt ,
    Cc: Richard Henderson ,
    Cc: Michael Starvik ,
    Cc: David Howells ,
    Cc: Yoshinori Sato ,
    Cc: Hirokazu Takata ,
    Cc: Geert Uytterhoeven ,
    Cc: Roman Zippel ,
    Cc: William L. Irwin ,
    Cc: Chris Zankel ,
    Cc: H. Peter Anvin ,
    Cc: Jan Engelhardt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    H. Peter Anvin
     
  • 03a44825b   procfs: constify function pointer tables ... Browse Code »

    Signed-off-by: Jan Engelhardt
    Acked-by: Geert Uytterhoeven
    Acked-by: Mike Frysinger
    Acked-By: David Howells
    Acked-by: Bryan Wu
    Acked-by: Jesper Nilsson
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jan Engelhardt
     

07 Feb, 2008

1 commit

  • 6c81c32f9   calibrate_delay() must be __cpuinit ... Browse Code »

    calibrate_delay() must be __cpuinit, not __{dev,}init.

    I've verified that this is correct for all users.

    While doing the latter, I also did the following cleanups:
    - remove pointless additional prototypes in C files
    - ensure all users #include

    This fixes the following section mismatches with CONFIG_HOTPLUG=n,
    CONFIG_HOTPLUG_CPU=y:

    WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder')
    WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map')

    Signed-off-by: Adrian Bunk
    Cc: Ivan Kokshaysky
    Cc: Richard Henderson
    Cc: "Luck, Tony"
    Cc: Ralf Baechle
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: "David S. Miller"
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Cc: Christian Zankel
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Adrian Bunk
     

03 Feb, 2008

1 commit

  • 125e56458   Move Kconfig.instrumentation to arch/Kconfig and init/Kconfig ... Browse Code »

    Move the instrumentation Kconfig to

    arch/Kconfig for architecture dependent options
    - oprofile
    - kprobes

    and

    init/Kconfig for architecture independent options
    - profiling
    - markers

    Remove the "Instrumentation Support" menu. Everything moves to "General setup".
    Delete the kernel/Kconfig.instrumentation file.

    Signed-off-by: Mathieu Desnoyers
    Cc: Linus Torvalds
    Cc:
    Signed-off-by: Sam Ravnborg

    Mathieu Desnoyers
     

02 Feb, 2008

1 commit

29 Jan, 2008

2 commits