Eric Lee / smarc-fsl-linux-kernel

29 Apr, 2008

1 commit

  • b75056805   fix ia64 local_irq_save() et.al. ... Browse Code »

    psr is not a good name for local variable in macro body when it
    has a good chance of being the argument of said macro (actually
    is at least in one place)

    Signed-off-by: Al Viro
    Signed-off-by: Linus Torvalds

    Al Viro
     

28 Apr, 2008

4 commits

  • 7f2e9525b   hugetlbfs: common code update for s390 ... Browse Code »

    Huge ptes have a special type on s390 and cannot be handled with the standard
    pte functions in certain cases, e.g. because of a different location of the
    invalid bit. This patch adds some new architecture- specific functions to
    hugetlb common code, as a prerequisite for the s390 large page support.

    This won't affect other architectures in functionality, but I need to add some
    new dummy inline functions to the headers.

    Acked-by: Martin Schwidefsky
    Signed-off-by: Gerald Schaefer
    Cc: Paul Mundt
    Cc: "Luck, Tony"
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "David S. Miller"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Gerald Schaefer
     
  • 8fe627ec5   hugetlbfs: add missing TLB flush to hugetlb_cow() ... Browse Code »

    A cow break on a hugetlbfs page with page_count > 1 will set a new pte with
    set_huge_pte_at(), w/o any tlb flush operation. The old pte will remain in
    the tlb and subsequent write access to the page will result in a page fault
    loop, for as long as it may take until the tlb is flushed from somewhere else.
    This patch introduces an architecture-specific huge_ptep_clear_flush()
    function, which is called before the the set_huge_pte_at() in hugetlb_cow().

    ATTENTION: This is just a nop on all architectures for now, the s390
    implementation will come with our large page patch later. Other architectures
    should define their own huge_ptep_clear_flush() if needed.

    Acked-by: Martin Schwidefsky
    Signed-off-by: Gerald Schaefer
    Cc: Paul Mundt
    Cc: "Luck, Tony"
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "David S. Miller"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Gerald Schaefer
     
  • 6d779079b   hugetlbfs: architecture header cleanup ... Browse Code »

    This patch moves all architecture functions for hugetlb to architecture header
    files (include/asm-foo/hugetlb.h) and converts all macros to inline functions.
    It also removes (!) ARCH_HAS_HUGEPAGE_ONLY_RANGE,
    ARCH_HAS_HUGETLB_FREE_PGD_RANGE, ARCH_HAS_PREPARE_HUGEPAGE_RANGE,
    ARCH_HAS_SETCLEAR_HUGE_PTE and ARCH_HAS_HUGETLB_PREFAULT_HOOK.

    Getting rid of the ARCH_HAS_xxx #ifdef and macro fugliness should increase
    readability and maintainability, at the price of some code duplication. An
    asm-generic common part would have reduced the loc, but we would end up with
    new ARCH_HAS_xxx defines eventually.

    Acked-by: Martin Schwidefsky
    Signed-off-by: Gerald Schaefer
    Cc: Paul Mundt
    Cc: "Luck, Tony"
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "David S. Miller"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Gerald Schaefer
     
  • 7e675137a   mm: introduce pte_special pte bit ... Browse Code »

    s390 for one, cannot implement VM_MIXEDMAP with pfn_valid, due to their memory
    model (which is more dynamic than most). Instead, they had proposed to
    implement it with an additional path through vm_normal_page(), using a bit in
    the pte to determine whether or not the page should be refcounted:

    vm_normal_page()
    {
    ...
    if (unlikely(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP))) {
    if (vma->vm_flags & VM_MIXEDMAP) {
    #ifdef s390
    if (!mixedmap_refcount_pte(pte))
    return NULL;
    #else
    if (!pfn_valid(pfn))
    return NULL;
    #endif
    goto out;
    }
    ...
    }

    This is fine, however if we are allowed to use a bit in the pte to determine
    refcountedness, we can use that to _completely_ replace all the vma based
    schemes. So instead of adding more cases to the already complex vma-based
    scheme, we can have a clearly seperate and simple pte-based scheme (and get
    slightly better code generation in the process):

    vm_normal_page()
    {
    #ifdef s390
    if (!mixedmap_refcount_pte(pte))
    return NULL;
    return pte_page(pte);
    #else
    ...
    #endif
    }

    And finally, we may rather make this concept usable by any architecture rather
    than making it s390 only, so implement a new type of pte state for this.
    Unfortunately the old vma based code must stay, because some architectures may
    not be able to spare pte bits. This makes vm_normal_page a little bit more
    ugly than we would like, but the 2 cases are clearly seperate.

    So introduce a pte_special pte state, and use it in mm/memory.c. It is
    currently a noop for all architectures, so this doesn't actually result in any
    compiled code changes to mm/memory.o.

    BTW:
    I haven't put vm_normal_page() into arch code as-per an earlier suggestion.
    The reason is that, regardless of where vm_normal_page is actually
    implemented, the *abstraction* is still exactly the same. Also, while it
    depends on whether the architecture has pte_special or not, that is the
    only two possible cases, and it really isn't an arch specific function --
    the role of the arch code should be to provide primitive functions and
    accessors with which to build the core code; pte_special does that. We do
    not want architectures to know or care about vm_normal_page itself, and
    we definitely don't want them being able to invent something new there
    out of sight of mm/ code. If we made vm_normal_page an arch function, then
    we have to make vm_insert_mixed (next patch) an arch function too. So I
    don't think moving it to arch code fundamentally improves any abstractions,
    while it does practically make the code more difficult to follow, for both
    mm and arch developers, and easier to misuse.

    [akpm@linux-foundation.org: build fix]
    Signed-off-by: Nick Piggin
    Acked-by: Carsten Otte
    Cc: Jared Hulbert
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nick Piggin
     

27 Apr, 2008

4 commits

23 Apr, 2008

1 commit

22 Apr, 2008

2 commits

  • 4fa2f0e67   [IA64] simplify notify hooks in mca.c ... Browse Code »

    There are many notify_die() and almost all take same style with
    ia64_mca_spin(). This patch defines macros and replace them all,
    to reduce lines and to improve readability.

    Signed-off-by: Hidetoshi Seto
    Signed-off-by: Tony Luck

    Hidetoshi Seto
     
  • 429f731de   Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc ... Browse Code »

    * 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc:
    Deprecate the asm/semaphore.h files in feature-removal-schedule.
    Convert asm/semaphore.h users to linux/semaphore.h
    security: Remove unnecessary inclusions of asm/semaphore.h
    lib: Remove unnecessary inclusions of asm/semaphore.h
    kernel: Remove unnecessary inclusions of asm/semaphore.h
    include: Remove unnecessary inclusions of asm/semaphore.h
    fs: Remove unnecessary inclusions of asm/semaphore.h
    drivers: Remove unnecessary inclusions of asm/semaphore.h
    net: Remove unnecessary inclusions of asm/semaphore.h
    arch: Remove unnecessary inclusions of asm/semaphore.h

    Linus Torvalds
     

20 Apr, 2008

2 commits

  • 1d3504fcf   sched, cpuset: customize sched domains, core ... Browse Code »

    [rebased for sched-devel/latest]

    - Add a new cpuset file, having levels:
    sched_relax_domain_level

    - Modify partition_sched_domains() and build_sched_domains()
    to take attributes parameter passed from cpuset.

    - Fill newidle_idx for node domains which currently unused but
    might be required if sched_relax_domain_level become higher.

    - We can change the default level by boot option 'relax_domain_level='.

    Signed-off-by: Hidetoshi Seto
    Signed-off-by: Ingo Molnar

    Hidetoshi Seto
     
  • aa6b54461   asm-generic: add node_to_cpumask_ptr macro ... Browse Code »

    Create a simple macro to always return a pointer to the node_to_cpumask(node)
    value. This relies on compiler optimization to remove the extra indirection:

    #define node_to_cpumask_ptr(v, node) \
    cpumask_t _##v = node_to_cpumask(node), *v = &_##v

    For those systems with a large cpumask size, then a true pointer
    to the array element can be used:

    #define node_to_cpumask_ptr(v, node) \
    cpumask_t *v = &(node_to_cpumask_map[node])

    A node_to_cpumask_ptr_next() macro is provided to access another
    node_to_cpumask value.

    The other change is to always include asm-generic/topology.h moving the
    ifdef CONFIG_NUMA to this same file.

    Note: there are no references to either of these new macros in this patch,
    only the definition.

    Based on 2.6.25-rc5-mm1

    # alpha
    Cc: Richard Henderson

    # fujitsu
    Cc: David Howells

    # ia64
    Cc: Tony Luck

    # powerpc
    Cc: Paul Mackerras
    Cc: Anton Blanchard

    # sparc
    Cc: David S. Miller
    Cc: William L. Irwin

    # x86
    Cc: H. Peter Anvin

    Signed-off-by: Mike Travis
    Signed-off-by: Ingo Molnar

    Mike Travis
     

19 Apr, 2008

2 commits

  • 5a6483feb   include: Remove unnecessary inclusions of asm/semaphore.h ... Browse Code »

    None of these files use any of the functionality promised by
    asm/semaphore.h. It's possible that they (or some user of them) rely
    on it dragging in some unrelated header file, but I can't build all
    these files, so we'll have to fix any build failures as they come up.

    Signed-off-by: Matthew Wilcox

    Matthew Wilcox
     
  • 4786b4ee2   Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 ... Browse Code »

    * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (27 commits)
    [IA64] kdump: Add crash_save_vmcoreinfo for INIT
    [IA64] Fix NUMA configuration issue
    [IA64] Itanium Spec updates
    [IA64] Untangle sync_icache_dcache() page size determination
    [IA64] arch/ia64/kernel/: use time_* macros
    [IA64] remove redundant display of free swap space in show_mem()
    [IA64] make IOMMU respect the segment boundary limits
    [IA64] kprobes: kprobe-booster for ia64
    [IA64] fix getpid and set_tid_address fast system calls for pid namespaces
    [IA64] Replace explicit jiffies tests with time_* macros.
    [IA64] use goto to jump out do/while_each_thread
    [IA64] Fix unlock ordering in smp_callin
    [IA64] pgd_offset() constfication.
    [IA64] kdump: crash.c coding style fix
    [IA64] kdump: add kdump_on_fatal_mca
    [IA64] Minimize per_cpu reservations.
    [IA64] Correct pernodesize calculation.
    [IA64] Kernel parameter for max number of concurrent global TLB purges
    [IA64] Multiple outstanding ptc.g instruction support
    [IA64] Implement smp_call_function_mask for ia64
    ...

    Linus Torvalds
     

18 Apr, 2008

10 commits

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
     

12 Apr, 2008

1 commit

  • 98075d245   [IA64] Fix NUMA configuration issue ... Browse Code »

    There is a NUMA memory configuration issue in 2.6.24:

    A 2-node machine of ours has got the following memory layout:

    Node 0: 0 - 2 Gbytes
    Node 0: 4 - 8 Gbytes
    Node 1: 8 - 16 Gbytes
    Node 0: 16 - 18 Gbytes

    "efi_memmap_init()" merges the three last ranges into one.

    "register_active_ranges()" is called as follows:

    efi_memmap_walk(register_active_ranges, NULL);

    i.e. once for the 4 - 18 Gbytes range. It picks up the node
    number from the start address, and registers all the memory for
    the node #0.

    "register_active_ranges()" should be called as follows to
    make sure there is no merged address range at its entry:

    efi_memmap_walk(filter_memory, register_active_ranges);

    "filter_memory()" is similar to "filter_rsvd_memory()",
    but the reserved memory ranges are not filtered out.

    Signed-off-by: Zoltan Menyhart
    Signed-off-by: Tony Luck

    Zoltan Menyhart
     

10 Apr, 2008

3 commits

  • c19b2930d   [IA64] Itanium Spec updates ... Browse Code »

    Updates based on the "Intel® Itanium® Architecture Software Developer's Manual
    Specification Update October 2007".

    http://download.intel.com/design/itanium/specupdt/24869911.pdf

    Signed-off-by: Russ Anderson
    Signed-off-by: Tony Luck

    Russ Anderson
     
  • 34e1ceb18   [IA64] kprobes: kprobe-booster for ia64 ... Browse Code »

    Add kprobe-booster support on ia64.

    Kprobe-booster improves the performance of kprobes by eliminating single-step,
    where possible. Currently, kprobe-booster is implemented on x86 and x86-64.
    This is an ia64 port.

    On ia64, kprobe-booster executes a copied bundle directly, instead of single
    stepping. Bundles which have B or X unit and which may cause an exception
    (including break) are not executed directly. And also, to prevent hitting
    break exceptions on the copied bundle, only the hindmost kprobe is executed
    directly if several kprobes share a bundle and are placed in different slots.
    Note: set_brl_inst() is used for preparing an instruction buffer(it does not
    modify any active code), so it does not need any atomic operation.

    Signed-off-by: Masami Hiramatsu
    Cc: Anil S Keshavamurthy
    Cc: Ananth N Mavinakayanahalli
    Cc: bibo,mao
    Cc: Rusty Lynch
    Cc: Prasanna S Panchamukhi
    Cc: Jim Keniston
    Cc: Shaohua Li
    Signed-off-by: Andrew Morton
    Signed-off-by: Tony Luck

    Masami Hiramatsu
     
  • e4b05d409   [IA64] pgd_offset() constfication. ... Browse Code »

    when compile 2.6.25-rc8-mm1, below warning happend.
    because walk_page_range pass argument as "const struct mm*",
    but pgd_offset() receive as "struct mm*".

    CC mm/pagewalk.o
    mm/pagewalk.c: In function 'walk_page_range':
    mm/pagewalk.c:111: warning: passing argument 1 of 'pgd_offset' discards qualifiers from pointer target type

    Signed-off-by: KOSAKI Motohiro
    Signed-off-by: Tony Luck

    KOSAKI Motohiro
     

09 Apr, 2008

1 commit

  • 2c6e6db41   [IA64] Minimize per_cpu reservations. ... Browse Code »

    This attached patch significantly shrinks boot memory allocation on ia64.
    It does this by not allocating per_cpu areas for cpus that can never
    exist.

    In the case where acpi does not have any numa node description of the
    cpus, I defaulted to assigning the first 32 round-robin on the known
    nodes.. For the !CONFIG_ACPI I used for_each_possible_cpu().

    Signed-off-by: Robin Holt
    Signed-off-by: Tony Luck

    holt@sgi.com
     

05 Apr, 2008

2 commits

  • a6c75b86c   [IA64] Kernel parameter for max number of concurrent global TLB purges ... Browse Code »

    The patch defines kernel parameter "nptcg=". The parameter overrides max number
    of concurrent global TLB purges which is reported from either PAL_VM_SUMMARY or
    SAL PALO.

    Signed-off-by: Fenghua Yu
    Signed-off-by: Tony Luck

    Fenghua Yu
     
  • 2046b94e7   [IA64] Multiple outstanding ptc.g instruction support ... Browse Code »

    According to SDM2.2, Itanium supports multiple outstanding ptc.g instructions.
    But current kernel function ia64_global_tlb_purge() uses a spinlock to serialize
    ptc.g instructions issued by multiple processors. This serialization might have
    scalability issue on a big SMP machine where many processors could purge TLB
    in parallel.

    The patch fixes this problem by issuing multiple ptc.g instructions in
    ia64_global_tlb_purge(). It also adds support for the "PALO" table to get
    a platform view of the max number of outstanding ptc.g instructions (which
    may be different from the processor view found from PAL_VM_SUMMARY).

    PALO specification can be found at: http://www.dig64.org/home/DIG64_PALO_R1_0.pdf

    spinaphore implementation by Matthew Wilcox.

    Signed-off-by: Fenghua Yu
    Signed-off-by: Tony Luck

    Fenghua Yu
     

04 Apr, 2008

2 commits

03 Apr, 2008

1 commit

  • dd135ebbd   kvm: provide kvm.h for all architecture: fixes headers_install ... Browse Code »

    Currently include/linux/kvm.h is not considered by make headers_install,
    because Kbuild cannot handle " unifdef-$(CONFIG_FOO) += foo.h. This problem
    was introduced by

    commit fb56dbb31c4738a3918db81fd24da732ce3b4ae6
    Author: Avi Kivity
    Date: Sun Dec 2 10:50:06 2007 +0200

    KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM

    Currently, make headers_check barfs due to , which
    includes, not existing. Rather than add a zillion s, export kvm.
    only if the arch actually supports it.

    Signed-off-by: Avi Kivity

    which makes this an 2.6.25 regression.

    One way of solving the issue is to enhance Kbuild, but Avi and David conviced
    me, that changing headers_install is not the way to go. This patch changes
    the definition for linux/kvm.h to unifdef-y.

    If  unifdef-y is used for linux/kvm.h "make headers_check" will fail on all
    architectures without asm/kvm.h. Therefore, this patch also provides
    asm/kvm.h on all architectures.

    Signed-off-by: Christian Borntraeger
    Acked-by: Avi Kivity
    Cc: Sam Ravnborg
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christian Borntraeger
     

13 Mar, 2008

2 commits

07 Mar, 2008

1 commit