Eric Lee / smarc-ti-linux-kernel

21 Jun, 2012

1 commit

  • dad7557eb   mm: fix kernel-doc warnings ... Browse Code »

    Fix kernel-doc warnings such as

    Warning(../mm/page_cgroup.c:432): No description found for parameter 'id'
    Warning(../mm/page_cgroup.c:432): Excess function parameter 'mem' description in 'swap_cgroup_record'

    Signed-off-by: Wanpeng Li
    Cc: Randy Dunlap
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Wanpeng Li
     

21 Jan, 2012

1 commit

23 Nov, 2011

2 commits

  • a855b84c3   percpu: fix chunk range calculation ... Browse Code »

    Percpu allocator recorded the cpus which map to the first and last
    units in pcpu_first/last_unit_cpu respectively and used them to
    determine the address range of a chunk - e.g. it assumed that the
    first unit has the lowest address in a chunk while the last unit has
    the highest address.

    This simply isn't true. Groups in a chunk can have arbitrary positive
    or negative offsets from the previous one and there is no guarantee
    that the first unit occupies the lowest offset while the last one the
    highest.

    Fix it by actually comparing unit offsets to determine cpus occupying
    the lowest and highest offsets. Also, rename pcu_first/last_unit_cpu
    to pcpu_low/high_unit_cpu to avoid confusion.

    The chunk address range is used to flush cache on vmalloc area
    map/unmap and decide whether a given address is in the first chunk by
    per_cpu_ptr_to_phys() and the bug was discovered by invalid
    per_cpu_ptr_to_phys() translation for crash_note.

    Kudos to Dave Young for tracking down the problem.

    Signed-off-by: Tejun Heo
    Reported-by: WANG Cong
    Reported-by: Dave Young
    Tested-by: Dave Young
    LKML-Reference:
    Cc: stable @kernel.org

    Tejun Heo
     
  • 90459ce06   percpu: rename pcpu_mem_alloc to pcpu_mem_zalloc ... Browse Code »

    Currently pcpu_mem_alloc() is implemented always return zeroed memory.
    So rename it to make user like pcpu_get_pages_and_bitmap() know don't
    reinit it.

    Signed-off-by: Bob Liu
    Reviewed-by: Pekka Enberg
    Reviewed-by: Michal Hocko
    Signed-off-by: Tejun Heo

    Bob Liu
     

14 Jan, 2011

1 commit

01 May, 2010

1 commit

  • 9f6455325   percpu: move vmalloc based chunk management into percpu-vm.c ... Browse Code »

    Separate out and move chunk management (creation/desctruction and
    [de]population) code into percpu-vm.c which is included by percpu.c
    and compiled together. The interface for chunk management is defined
    as follows.

    * pcpu_populate_chunk - populate the specified range of a chunk
    * pcpu_depopulate_chunk - depopulate the specified range of a chunk
    * pcpu_create_chunk - create a new chunk
    * pcpu_destroy_chunk - destroy a chunk, always preceded by full depop
    * pcpu_addr_to_page - translate address to physical address
    * pcpu_verify_alloc_info - check alloc_info is acceptable during init

    Other than wrapping vmalloc_to_page() inside pcpu_addr_to_page() and
    dummy pcpu_verify_alloc_info() implementation, this patch only moves
    code around. This separation is to allow alternate chunk management
    implementation.

    Signed-off-by: Tejun Heo
    Reviewed-by: David Howells
    Cc: Graff Yang
    Cc: Sonic Zhang

    Tejun Heo