Eric Lee / smarc-fsl-linux-kernel

20 Jul, 2007

1 commit

  • 20c2df83d   mm: Remove slab destructors from kmem_cache_create(). ... Browse Code »

    Slab destructors were no longer supported after Christoph's
    c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been
    BUGs for both slab and slub, and slob never supported them
    either.

    This rips out support for the dtor pointer from kmem_cache_create()
    completely and fixes up every single callsite in the kernel (there were
    about 224, not including the slab allocator definitions themselves,
    or the documentation references).

    Signed-off-by: Paul Mundt

    Paul Mundt
     

11 Jul, 2007

7 commits

  • 631d1feba   configfs: config item dependancies. ... Browse Code »

    Sometimes other drivers depend on particular configfs items. For
    example, ocfs2 mounts depend on a heartbeat region item. If that
    region item is removed with rmdir(2), the ocfs2 mount must BUG or go
    readonly. Not happy.

    This provides two additional API calls: configfs_depend_item() and
    configfs_undepend_item(). A client driver can call
    configfs_depend_item() on an existing item to tell configfs that it is
    depended on. configfs will then return -EBUSY from rmdir(2) for that
    item. When the item is no longer depended on, the client driver calls
    configfs_undepend_item() on it.

    These API cannot be called underneath any configfs callbacks, as
    they will conflict. They can block and allocate. A client driver
    probably shouldn't calling them of its own gumption. Rather it should
    be providing an API that external subsystems call.

    How does this work? Imagine the ocfs2 mount process. When it mounts,
    it asks for a heart region item. This is done via a call into the
    heartbeat code. Inside the heartbeat code, the region item is looked
    up. Here, the heartbeat code calls configfs_depend_item(). If it
    succeeds, then heartbeat knows the region is safe to give to ocfs2.
    If it fails, it was being torn down anyway, and heartbeat can gracefully
    pass up an error.

    [ Fixed some bad whitespace in configfs.txt. --Mark ]

    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     
  • 299894cc9   configfs: accessing item hierarchy during rmdir(2) ... Browse Code »

    Add a notification callback, ops->disconnect_notify(). It has the same
    prototype as ->drop_item(), but it will be called just before the item
    linkage is broken. This way, configfs users who want to do work while
    the object is still in the heirarchy have a chance.

    Client drivers will still need to config_item_put() in their
    ->drop_item(), if they implement it. They need do nothing in
    ->disconnect_notify(). They don't have to provide it if they don't
    care. But someone who wants to be notified before ci_parent is set to
    NULL can now be notified.

    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     
  • 6d748924b   [PATCH] configsfs buffer: use mutex ... Browse Code »

    Seems copied from sysfs, but I don't see a reason here nor there to use
    a semaphore instead of a mutex. Convert.

    Signed-off-by: Johannes Berg
    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Johannes Berg
     
  • e6bd07aee   configfs: Convert subsystem semaphore to mutex ... Browse Code »

    Convert the su_sem member of struct configfs_subsystem to a struct
    mutex, as that's what it is. Also convert all the users and update
    Documentation/configfs.txt and Documentation/configfs_example.c
    accordingly.

    [ Conflict in fs/dlm/config.c with commit
    3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ]

    Inspired-by: Satyam Sharma
    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     
  • 3fe6c5ce1   [PATCH] configfs+dlm: Rename config_group_find_obj and state semantics clearly ... Browse Code »

    Configfs being based upon sysfs code, config_group_find_obj() is probably
    so named because of the similar kset_find_obj() in sysfs. However,
    "kobject"s in sysfs become "config_item"s in configfs, so let's call it
    config_group_find_item() instead, for sake of uniformity, and make
    corresponding change in the users of this function.

    BTW a crucial difference between kset_find_obj and config_group_find_item
    is in locking expectations. kset_find_obj does its locking by itself, but
    config_group_find_item expects the *caller* to do the locking. The reason
    for this: kset's have their own locks, config_group's don't but instead
    rely on the subsystem mutex. And, subsystem needn't necessarily be around
    when config_group_find_item() is called.

    So let's state these locking semantics explicitly, and rectify the comment,
    otherwise bugs could continue to occur in future, as they did in the past
    (refer commit d82b8191e238 in gfs2-2.6-fixes.git).

    [ I also took the opportunity to fix some bad whitespace and
    double-empty lines. --Joel ]

    [ Conflict in fs/dlm/config.c with commit
    3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ]

    Signed-off-by: Satyam Sharma
    Cc: David Teigland
    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Satyam Sharma
     
  • 4c62b5345   configfs: misc cleanups ... Browse Code »

    1. item.c:config_item_cleanup() is a private function (only called by
    config_item_release() in same file). However, it is spuriously
    exported in include/linux/configfs.h, so remove that export and make
    it static in item.c. Also, it is no longer exported / interface
    function, so no need to give comment for this function (the comment
    was stating obvious thing, anyway).

    2. Kernel-doc comment format does not allow empty line between end of
    comment and start of function (declaration line). There were several
    such spurious empty lines in item.c, so fix them.

    fs/configfs/item.c | 15 +++------------
    include/linux/configfs.h | 1 -
    2 files changed, 3 insertions(+), 13 deletions(-)

    Signed-off-by: Satyam Sharma
    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Satyam Sharma
     
  • b23cdde4c   configfs: consistent attribute size ... Browse Code »

    The attribute store/show code currently limits attributes at PAGE_SIZE.
    This code comes from sysfs, where it still works that way.

    However, PAGE_SIZE is not constant. A 16k attribute string works on
    ia64 but not on x86. Really a subsystem shouldn't allow different
    attribute sizes based on platform.

    As such, limit all simple attributes to 4k. This works on all
    platforms, and is consistent with all current code.

    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     

22 May, 2007

1 commit

  • e8edc6e03   Detach sched.h from mm.h ... Browse Code »

    First thing mm.h does is including sched.h solely for can_do_mlock() inline
    function which has "current" dereference inside. By dealing with can_do_mlock()
    mm.h can be detached from sched.h which is good. See below, why.

    This patch
    a) removes unconditional inclusion of sched.h from mm.h
    b) makes can_do_mlock() normal function in mm/mlock.c
    c) exports can_do_mlock() to not break compilation
    d) adds sched.h inclusions back to files that were getting it indirectly.
    e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
    getting them indirectly

    Net result is:
    a) mm.h users would get less code to open, read, preprocess, parse, ... if
    they don't need sched.h
    b) sched.h stops being dependency for significant number of files:
    on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
    after patch it's only 3744 (-8.3%).

    Cross-compile tested on

    all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
    alpha alpha-up
    arm
    i386 i386-up i386-defconfig i386-allnoconfig
    ia64 ia64-up
    m68k
    mips
    parisc parisc-up
    powerpc powerpc-up
    s390 s390-up
    sparc sparc-up
    sparc64 sparc64-up
    um-x86_64
    x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig

    as well as my two usual configs.

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

10 May, 2007

1 commit

03 May, 2007

1 commit

15 Mar, 2007

1 commit

  • afdf04ea0   configfs: add missing mutex_unlock() ... Browse Code »

    d_alloc() failure in configfs_register_subsystem() would fail to unlock
    the mutex taken above. Reorganize the exit path to ensure the unlock
    happens.

    Reported-by: Akinobu Mita
    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     

13 Feb, 2007

2 commits

  • ee9b6d61a   [PATCH] Mark struct super_operations const ... Browse Code »

    This patch is inspired by Arjan's "Patch series to mark struct
    file_operations and struct inode_operations const".

    Compile tested with gcc & sparse.

    Signed-off-by: Josef 'Jeff' Sipek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Josef 'Jeff' Sipek
     
  • 754661f14   [PATCH] mark struct inode_operations const 1 ... 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

  • c37622296   [PATCH] Transform kmem_cache_alloc()+memset(0) -> kmem_cache_zalloc(). ... Browse Code »

    Replace appropriate pairs of "kmem_cache_alloc()" + "memset(0)" with the
    corresponding "kmem_cache_zalloc()" call.

    Signed-off-by: Robert P. J. Day
    Cc: "Luck, Tony"
    Cc: Andi Kleen
    Cc: Roland McGrath
    Cc: James Bottomley
    Cc: Greg KH
    Acked-by: Joel Becker
    Cc: Steven Whitehouse
    Cc: Jan Kara
    Cc: Michael Halcrow
    Cc: "David S. Miller"
    Cc: Stephen Smalley
    Cc: James Morris
    Cc: Chris Wright
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Robert P. J. Day
     

08 Feb, 2007

1 commit

  • ff05d1c46   configfs: Zero terminate data in configfs attribute writes. ... Browse Code »

    Attributes in configfs are text files. As such, most handlers expect to be
    able to call functions like simple_strtoul() without checking the bounds
    of the buffer. Change the call to zero terminate the buffer before calling
    the client's ->store() method. This does reduce the attribute size from
    PAGE_SIZE to PAGE_SIZE-1.

    Also, change get_zeroed_page() to alloc_page(), as we are handling the
    termination.

    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     

09 Dec, 2006

1 commit

08 Dec, 2006

1 commit

  • e18b890bb   [PATCH] slab: remove kmem_cache_t ... Browse Code »

    Replace all uses of kmem_cache_t with struct kmem_cache.

    The patch was generated using the following script:

    #!/bin/sh
    #
    # Replace one string by another in all the kernel sources.
    #

    set -e

    for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do
    quilt add $file
    sed -e "1,\$s/$1/$2/g" $file >/tmp/$$
    mv /tmp/$$ $file
    quilt refresh
    done

    The script was run like this

    sh replace kmem_cache_t "struct kmem_cache"

    Signed-off-by: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Lameter
     

02 Dec, 2006

2 commits

21 Oct, 2006

1 commit

05 Oct, 2006

1 commit

  • 4a61f1737   Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6 ... Browse Code »

    * git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6: (292 commits)
    [GFS2] Fix endian bug for de_type
    [GFS2] Initialize SELinux extended attributes at inode creation time.
    [GFS2] Move logging code into log.c (mostly)
    [GFS2] Mark nlink cleared so VFS sees it happen
    [GFS2] Two redundant casts removed
    [GFS2] Remove uneeded endian conversion
    [GFS2] Remove duplicate sb reading code
    [GFS2] Mark metadata reads for blktrace
    [GFS2] Remove iflags.h, use FS_
    [GFS2] Fix code style/indent in ops_file.c
    [GFS2] streamline-generic_file_-interfaces-and-filemap gfs fix
    [GFS2] Remove readv/writev methods and use aio_read/aio_write instead (gfs bits)
    [GFS2] inode-diet: Eliminate i_blksize from the inode structure
    [GFS2] inode_diet: Replace inode.u.generic_ip with inode.i_private (gfs)
    [GFS2] Fix typo in last patch
    [GFS2] Fix direct i/o logic in filemap.c
    [GFS2] Fix bug in Makefiles for lock modules
    [GFS2] Remove (extra) fs_subsys declaration
    [GFS2/DLM] Fix trailing whitespace
    [GFS2] Tidy up meta_io code
    ...

    Linus Torvalds
     

03 Oct, 2006

1 commit

02 Oct, 2006

1 commit

01 Oct, 2006

1 commit

28 Sep, 2006

1 commit

27 Sep, 2006

2 commits

26 Sep, 2006

1 commit

  • 363e065c0   [GFS2] Fix up merge of Linus' kernel into GFS2 ... Browse Code »

    This fixes up a couple of conflicts when merging up with
    Linus' latest kernel. This will hopefully allow GFS2 to
    be more easily merged into forthcoming -mm and FC kernels
    due to the "one line per header" format now used for the
    kernel headers.

    Signed-off-by: Steven Whitehouse

    Conflicts:

    include/linux/Kbuild
    include/linux/kernel.h

    Steven Whitehouse
     

21 Sep, 2006

1 commit

  • b4c98f625   configfs: Prevent duplicate subsystem names. ... Browse Code »

    For all child objects, creation comes through mkdir(2), so duplicate names
    are prevented.

    Subsystems, though, are registered by client drivers at init_module()/__init
    time. This patch prevents duplicate subsystem names.

    Signed-off-by: Joel Becker
    Signed-off-by: Mark Fasheh

    Joel Becker
     

03 Jul, 2006

1 commit

30 Jun, 2006

1 commit

29 Jun, 2006

1 commit

27 Jun, 2006

1 commit

  • f116629d0   [PATCH] fs: use list_move() ... Browse Code »

    This patch converts the combination of list_del(A) and list_add(A, B) to
    list_move(A, B) under fs/.

    Cc: Ian Kent
    Acked-by: Joel Becker
    Cc: Neil Brown
    Cc: Hans Reiser
    Cc: Urban Widmark
    Acked-by: David Howells
    Acked-by: Mark Fasheh
    Signed-off-by: Akinobu Mita
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Akinobu Mita
     

25 Jun, 2006

1 commit

23 Jun, 2006

1 commit

  • 454e2398b   [PATCH] VFS: Permit filesystem to override root dentry on mount ... Browse Code »

    Extend the get_sb() filesystem operation to take an extra argument that
    permits the VFS to pass in the target vfsmount that defines the mountpoint.

    The filesystem is then required to manually set the superblock and root dentry
    pointers. For most filesystems, this should be done with simple_set_mnt()
    which will set the superblock pointer and then set the root dentry to the
    superblock's s_root (as per the old default behaviour).

    The get_sb() op now returns an integer as there's now no need to return the
    superblock pointer.

    This patch permits a superblock to be implicitly shared amongst several mount
    points, such as can be done with NFS to avoid potential inode aliasing. In
    such a case, simple_set_mnt() would not be called, and instead the mnt_root
    and mnt_sb would be set directly.

    The patch also makes the following changes:

    (*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
    pointer argument and return an integer, so most filesystems have to change
    very little.

    (*) If one of the convenience function is not used, then get_sb() should
    normally call simple_set_mnt() to instantiate the vfsmount. This will
    always return 0, and so can be tail-called from get_sb().

    (*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
    dcache upon superblock destruction rather than shrink_dcache_anon().

    This is required because the superblock may now have multiple trees that
    aren't actually bound to s_root, but that still need to be cleaned up. The
    currently called functions assume that the whole tree is rooted at s_root,
    and that anonymous dentries are not the roots of trees which results in
    dentries being left unculled.

    However, with the way NFS superblock sharing are currently set to be
    implemented, these assumptions are violated: the root of the filesystem is
    simply a dummy dentry and inode (the real inode for '/' may well be
    inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
    with child trees.

    [*] Anonymous until discovered from another tree.

    (*) The documentation has been adjusted, including the additional bit of
    changing ext2_* into foo_* in the documentation.

    [akpm@osdl.org: convert ipath_fs, do other stuff]
    Signed-off-by: David Howells
    Acked-by: Al Viro
    Cc: Nathan Scott
    Cc: Roland Dreier
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Howells
     

09 Jun, 2006

1 commit

26 May, 2006

1 commit

18 May, 2006

2 commits