Eric Lee / smarc-fsl-linux-kernel

28 May, 2010

2 commits

  • 3322e79a3   fs: convert simple fs to new truncate ... Browse Code »

    Convert simple filesystems: ramfs, configfs, sysfs, block_dev to new truncate
    sequence.

    Cc: Christoph Hellwig
    Signed-off-by: Nick Piggin
    Signed-off-by: Al Viro

    Nick Piggin
     
  • 1b061d924   rename the generic fsync implementations ... Browse Code »

    We don't name our generic fsync implementations very well currently.
    The no-op implementation for in-memory filesystems currently is called
    simple_sync_file which doesn't make too much sense to start with,
    the the generic one for simple filesystems is called simple_fsync
    which can lead to some confusion.

    This patch renames the generic file fsync method to generic_file_fsync
    to match the other generic_file_* routines it is supposed to be used
    with, and the no-op implementation to noop_fsync to make it obvious
    what to expect. In addition add some documentation for both methods.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Al Viro

    Christoph Hellwig
     

04 Jul, 2008

1 commit

29 Apr, 2008

1 commit

  • 4488c59c9   fs/ramfs/ extern cleanup ... Browse Code »

    - internal.h shouldn't duplicate the extern declaration for
    ramfs_file_operations already in include/linux/ramfs.h
    - file-mmu.c needs two #include's for seeing the extern declarations
    of it's global struct's

    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Adrian Bunk
     

17 Oct, 2007

1 commit

10 Jul, 2007

1 commit

13 Feb, 2007

1 commit

  • c5ef1c42c   [PATCH] mark struct inode_operations const 3 ... Browse Code »

    Many struct inode_operations in the kernel can be "const". Marking them const
    moves these to the .rodata section, which avoids false sharing with potential
    dirty data. In addition it'll catch accidental writes at compile time to
    these shared resources.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

12 Feb, 2007

1 commit

31 Dec, 2006

1 commit

01 Oct, 2006

1 commit

  • 543ade1fc   [PATCH] Streamline generic_file_* interfaces and filemap cleanups ... Browse Code »

    This patch cleans up generic_file_*_read/write() interfaces. Christoph
    Hellwig gave me the idea for this clean ups.

    In a nutshell, all filesystems should set .aio_read/.aio_write methods and use
    do_sync_read/ do_sync_write() as their .read/.write methods. This allows us
    to cleanup all variants of generic_file_* routines.

    Final available interfaces:

    generic_file_aio_read() - read handler
    generic_file_aio_write() - write handler
    generic_file_aio_write_nolock() - no lock write handler

    __generic_file_aio_write_nolock() - internal worker routine

    Signed-off-by: Badari Pulavarty
    Signed-off-by: Christoph Hellwig
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Badari Pulavarty
     

29 Jun, 2006

1 commit

29 Mar, 2006

1 commit

  • 4b6f5d20b   [PATCH] Make most file operations structs in fs/ const ... Browse Code »

    This is a conversion to make the various file_operations structs in fs/
    const. Basically a regexp job, with a few manual fixups

    The goal is both to increase correctness (harder to accidentally write to
    shared datastructures) and reducing the false sharing of cachelines with
    things that get dirty in .data (while .rodata is nicely read only and thus
    cache clean)

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

23 Mar, 2006

1 commit

07 Jan, 2006

1 commit

  • 642fb4d1f   [PATCH] NOMMU: Provide shared-writable mmap support on ramfs ... Browse Code »

    The attached patch makes ramfs support shared-writable mmaps by:

    (1) Attempting to perform a contiguous block allocation to the requested size
    when truncate attempts to increase the file from zero size, such as
    happens when:

    fd = shm_open("/file/on/ramfs", ...):
    ftruncate(fd, size_requested);
    addr = mmap(NULL, subsize, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED,
    fd, offset);

    (2) Permitting any shared-writable mapping over any contiguous set of extant
    pages. get_unmapped_area() will return the address into the actual ramfs
    pages. The mapping may start anywhere and be of any size, but may not go
    over the end of file. Multiple mappings may overlap in any way.

    (3) Not permitting a file to be shrunk if it would truncate any shared
    mappings (private mappings are copied).

    Thus this patch provides support for POSIX shared memory on NOMMU kernels,
    with certain limitations such as there being a large enough block of pages
    available to support the allocation and it only working on directly mappable
    filesystems.

    Signed-off-by: David Howells
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Howells