Doug / smarc-fsl-linux-kernel

07 Jan, 2011

1 commit

18 Nov, 2010

1 commit

29 Oct, 2010

1 commit

26 Oct, 2010

1 commit

  • 85fe4025c   fs: do not assign default i_ino in new_inode ... Browse Code »

    Instead of always assigning an increasing inode number in new_inode
    move the call to assign it into those callers that actually need it.
    For now callers that need it is estimated conservatively, that is
    the call is added to all filesystems that do not assign an i_ino
    by themselves. For a few more filesystems we can avoid assigning
    any inode number given that they aren't user visible, and for others
    it could be done lazily when an inode number is actually needed,
    but that's left for later patches.

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

    Christoph Hellwig
     

11 Aug, 2010

1 commit

  • 6e12ea465   USB-BKL: Remove lock_kernel in usbfs update_sb() ... Browse Code »

    The code this is attempting to lock against does not use the BKL,
    so it's not needed.

    Most likely this code is still broken/racy (Al Viro also thinks so),
    but removing the BKL should not make it worse than before.

    Signed-off-by: Andi Kleen
    Cc: Arnd Bergmann
    Signed-off-by: Greg Kroah-Hartman

    Andi Kleen
     

21 May, 2010

1 commit

  • 27729aadd   USB: make hcd.h public (drivers dependency) ... Browse Code »

    The usbcore headers: hcd.h and hub.h are shared between usbcore,
    HCDs and a couple of other drivers (e.g. USBIP modules).
    So, it makes sense to move them into a more public location and
    to cleanup dependency of those modules on kernel internal headers.
    This patch moves hcd.h from drivers/usb/core into include/linux/usb/

    Signed-of-by: Eric Lescouet
    Cc: Alan Stern
    Signed-off-by: Greg Kroah-Hartman

    Eric Lescouet
     

15 May, 2010

1 commit

  • d83c49f3e   Fix the regression created by "set S_DEAD on unlink()..." commit ... Browse Code »

    1) i_flags simply doesn't work for mount/unlink race prevention;
    we may have many links to file and rm on one of those obviously
    shouldn't prevent bind on top of another later on. To fix it
    right way we need to mark _dentry_ as unsuitable for mounting
    upon; new flag (DCACHE_CANT_MOUNT) is protected by d_flags and
    i_mutex on the inode in question. Set it (with dont_mount(dentry))
    in unlink/rmdir/etc., check (with cant_mount(dentry)) in places
    in namespace.c that used to check for S_DEAD. Setting S_DEAD
    is still needed in places where we used to set it (for directories
    getting killed), since we rely on it for readdir/rmdir race
    prevention.

    2) rename()/mount() protection has another bogosity - we unhash
    the target before we'd checked that it's not a mountpoint. Fixed.

    3) ancient bogosity in pivot_root() - we locked i_mutex on the
    right directory, but checked S_DEAD on the different (and wrong)
    one. Noticed and fixed.

    Signed-off-by: Al Viro

    Al Viro
     

01 May, 2010

1 commit

22 Sep, 2009

1 commit

12 Jun, 2009

1 commit

28 Jan, 2009

1 commit

  • 501950d84   USB: fix char-device disconnect handling ... Browse Code »

    This patch (as1198) fixes a conceptual bug: Somewhere along the line
    we managed to confuse USB class devices with USB char devices. As a
    result, the code to send a disconnect signal to userspace would not be
    built if both CONFIG_USB_DEVICE_CLASS and CONFIG_USB_DEVICEFS were
    disabled.

    The usb_fs_classdev_common_remove() routine has been renamed to
    usbdev_remove() and it is now called whenever any USB device is
    removed, not just when a class device is unregistered. The notifier
    registration and unregistration calls are no longer conditionally
    compiled. And since the common removal code will always be called as
    part of the char device interface, there's no need to call it again as
    part of the usbfs interface; thus the invocation of
    usb_fs_classdev_common_remove() has been taken out of
    usbfs_remove_device().

    Signed-off-by: Alan Stern
    Reported-by: Alon Bar-Lev
    Tested-by: Alon Bar-Lev
    Cc: stable

    Alan Stern
     

06 Jan, 2009

1 commit

14 Nov, 2008

1 commit

  • cd80ca8a0   CRED: Wrap task credential accesses in the USB driver ... Browse Code »

    Wrap access to task credentials so that they can be separated more easily from
    the task_struct during the introduction of COW creds.

    Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

    Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more
    sense to use RCU directly rather than a convenient wrapper; these will be
    addressed by later patches.

    Signed-off-by: David Howells
    Reviewed-by: James Morris
    Acked-by: Serge Hallyn
    Cc: Greg Kroah-Hartman
    Cc: linux-usb@vger.kernel.org
    Signed-off-by: James Morris

    David Howells
     

18 Oct, 2008

2 commits

14 Oct, 2008

1 commit

  • a447c0932   vfs: Use const for kernel parser table ... Browse Code »

    This is a much better version of a previous patch to make the parser
    tables constant. Rather than changing the typedef, we put the "const" in
    all the various places where its required, allowing the __initconst
    exception for nfsroot which was the cause of the previous trouble.

    This was posted for review some time ago and I believe its been in -mm
    since then.

    Signed-off-by: Steven Whitehouse
    Cc: Alexander Viro
    Signed-off-by: Linus Torvalds

    Steven Whitehouse
     

22 Jul, 2008

1 commit

  • cd9f03759   usbfs: send disconnect signals when device is unregistered ... Browse Code »

    USB device files are accessible in two ways: as files in usbfs and as
    character device nodes. The two paths are supposed to behave
    identically, but they don't. When the underlying USB device is
    unplugged, disconnect signals are sent to processes with open usbfs
    files (if they requested these signals) but not to processes with open
    device node files.

    This patch (as1104) fixes the bug by moving the disconnect-signalling
    code into a common subroutine which is called from both paths.
    Putting this subroutine in devio.c removes the only out-of-file
    reference to struct dev_state, and so the structure's declaration can
    be moved from usb.h into devio.c.

    Finally, the new subroutine performs one extra action: It kills all
    the outstanding async URBs. (I'd kill the outstanding synchronous
    URBs too, if there was any way to do it.) In the past this hasn't
    mattered much, because devices were unregistered from usbfs only
    when they were disconnected. But now the unregistration can also
    occur whenever devices are unbound from the usb_generic driver. At
    any rate, killing URBs when a device is unregistered from usbfs seems
    like a good thing to do.

    Signed-off-by: Alan Stern
    Signed-off-by: Greg Kroah-Hartman

    Alan Stern
     

29 Apr, 2008

1 commit

  • 9c37066d8   proc: remove proc_bus ... Browse Code »

    Remove proc_bus export and variable itself. Using pathnames works fine
    and is slightly more understandable and greppable.

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

    Alexey Dobriyan
     

25 Apr, 2008

1 commit

02 Feb, 2008

1 commit

09 May, 2007

1 commit

28 Apr, 2007

1 commit

  • 9f8b17e64   USB: make usbdevices export their device nodes instead of using a separate class ... Browse Code »

    o The "real" usb-devices export now a device node which can
    populate /dev/bus/usb.

    o The usb_device class is optional now and can be disabled in the
    kernel config. Major/minor of the "real" devices and class devices
    are the same.

    o The environment of the usb-device event contains DEVNUM and BUSNUM to
    help udev and get rid of the ugly udev rule we need for the class
    devices.

    o The usb-devices and usb-interfaces share the same bus, so I used
    the new "struct device_type" to let these devices identify
    themselves. This also removes the current logic of using a magic
    platform-pointer.
    The name of the device_type is also added to the environment
    which makes it easier to distinguish the different kinds of devices
    on the same subsystem.

    It looks like this:
    add@/devices/pci0000:00/0000:00:1d.1/usb2/2-1
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.1/usb2/2-1
    SUBSYSTEM=usb
    SEQNUM=1533
    MAJOR=189
    MINOR=131
    DEVTYPE=usb_device
    PRODUCT=46d/c03e/2000
    TYPE=0/0/0
    BUSNUM=002
    DEVNUM=004

    This udev rule works as a replacement for usb_device class devices:
    SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", \
    NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0644"

    Updated patch, which needs the device_type patches in Greg's tree.

    I also got a bugzilla assigned for this. :)
    https://bugzilla.novell.com/show_bug.cgi?id=250659

    Signed-off-by: Kay Sievers
    Signed-off-by: Greg Kroah-Hartman

    Kay Sievers
     

09 Dec, 2006

1 commit

02 Oct, 2006

1 commit

  • 2425c08b3   [PATCH] usb: fixup usb so it uses struct pid ... Browse Code »

    The problem with remembering a user space process by its pid is that it is
    possible that the process will exit, pid wrap around will occur.
    Converting to a struct pid avoid that problem, and paves the way for
    implementing a pid namespace.

    Also since usb is the only user of kill_proc_info_as_uid rename
    kill_proc_info_as_uid to kill_pid_info_as_uid and have the new version take
    a struct pid.

    Signed-off-by: Eric W. Biederman
    Acked-by: Greg Kroah-Hartman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric W. Biederman
     

01 Oct, 2006

2 commits

  • d8c76e6f4   [PATCH] r/o bind mount prepwork: inc_nlink() helper ... Browse Code »

    This is mostly included for parity with dec_nlink(), where we will have some
    more hooks. This one should stay pretty darn straightforward for now.

    Signed-off-by: Dave Hansen
    Acked-by: Christoph Hellwig
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dave Hansen
     
  • 9a53c3a78   [PATCH] r/o bind mounts: unlink: monitor i_nlink ... Browse Code »

    When a filesystem decrements i_nlink to zero, it means that a write must be
    performed in order to drop the inode from the filesystem.

    We're shortly going to have keep filesystems from being remounted r/o between
    the time that this i_nlink decrement and that write occurs.

    So, add a little helper function to do the decrements. We'll tie into it in a
    bit to note when i_nlink hits zero.

    Signed-off-by: Dave Hansen
    Acked-by: Christoph Hellwig
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dave Hansen
     

28 Sep, 2006

1 commit

27 Sep, 2006

2 commits

  • ba52de123   [PATCH] inode-diet: Eliminate i_blksize from the inode structure ... Browse Code »

    This eliminates the i_blksize field from struct inode. Filesystems that want
    to provide a per-inode st_blksize can do so by providing their own getattr
    routine instead of using the generic_fillattr() function.

    Note that some filesystems were providing pretty much random (and incorrect)
    values for i_blksize.

    [bunk@stusta.de: cleanup]
    [akpm@osdl.org: generic_fillattr() fix]
    Signed-off-by: "Theodore Ts'o"
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Theodore Ts'o
     
  • 8e18e2941   [PATCH] inode_diet: Replace inode.u.generic_ip with inode.i_private ... Browse Code »

    The following patches reduce the size of the VFS inode structure by 28 bytes
    on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction
    in the inode size on a UP kernel that is configured in a production mode
    (i.e., with no spinlock or other debugging functions enabled; if you want to
    save memory taken up by in-core inodes, the first thing you should do is
    disable the debugging options; they are responsible for a huge amount of bloat
    in the VFS inode structure).

    This patch:

    The filesystem or device-specific pointer in the inode is inside a union,
    which is pretty pointless given that all 30+ users of this field have been
    using the void pointer. Get rid of the union and rename it to i_private, with
    a comment to explain who is allowed to use the void pointer. This is just a
    cleanup, but it allows us to reuse the union 'u' for something something where
    the union will actually be used.

    [judith@osdl.org: powerpc build fix]
    Signed-off-by: "Theodore Ts'o"
    Signed-off-by: Judith Lebzelter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Theodore Ts'o
     

13 Jul, 2006

1 commit

04 Jul, 2006

2 commits

  • 8e7795ef6   [PATCH] lockdep: annotate USBFS ... Browse Code »

    In usbfs's fs_remove_file() function, the aim is to remove a file or
    directory from usbfs. This is done by first taking the i_mutex of the
    parent directory of this file/dir via
    mutex_lock(&parent->d_inode->i_mutex);
    and then to call either usbfs_rmdir() for a directory or usbfs_unlink()
    for a file. Both these functions then take the i_mutex for the
    to-be-removed object themselves:
    mutex_lock(&inode->i_mutex);

    This is a classical parent->child locking order relationship that the VFS uses
    all over the place; the VFS locking rule is "you need to take the parent
    first". This patch annotates the usbfs code to make this explicit and thus
    informs the lockdep code that those two locks indeed have this relationship.

    The rules for unlink that we already use in the VFS for unlink are to use
    I_MUTEX_PARENT for the parent directory, and a normal mutex for the file
    itself; this patch follows that convention.

    Has no effect on non-lockdep kernels.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Ingo Molnar
    Cc: Greg KH
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     
  • f2eace23e   [PATCH] lockdep: annotate i_mutex ... Browse Code »

    Teach special (recursive) locking code to the lock validator. Has no effect
    on non-lockdep kernels.

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

    Ingo Molnar
     

01 Jul, 2006

3 commits

  • 22a3e233c   Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial ... Browse Code »

    * git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial:
    Remove obsolete #include
    remove obsolete swsusp_encrypt
    arch/arm26/Kconfig typos
    Documentation/IPMI typos
    Kconfig: Typos in net/sched/Kconfig
    v9fs: do not include linux/version.h
    Documentation/DocBook/mtdnand.tmpl: typo fixes
    typo fixes: specfic -> specific
    typo fixes in Documentation/networking/pktgen.txt
    typo fixes: occuring -> occurring
    typo fixes: infomation -> information
    typo fixes: disadvantadge -> disadvantage
    typo fixes: aquire -> acquire
    typo fixes: mecanism -> mechanism
    typo fixes: bandwith -> bandwidth
    fix a typo in the RTC_CLASS help text
    smb is no longer maintained

    Manually merged trivial conflict in arch/um/kernel/vmlinux.lds.S

    Linus Torvalds
     
  • 7a01955f9   [PATCH] SELinux: update USB code with new kill_proc_info_as_uid ... Browse Code »

    This patch updates the USB core to save and pass the sending task secid when
    sending signals upon AIO completion so that proper security checking can be
    applied by security modules.

    Signed-off-by: David Quigley
    Signed-off-by: James Morris
    Cc: Stephen Smalley
    Cc: Chris Wright
    Signed-off-by: Greg Kroah-Hartman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Quigley
     
  • 6ab3d5624   Remove obsolete #include <linux/config.h> ... Browse Code »

    Signed-off-by: Jörn Engel
    Signed-off-by: Adrian Bunk

    Jörn Engel
     

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

10 Jan, 2006

1 commit

09 Jan, 2006

1 commit

  • 5160ee6fc   [PATCH] shrink dentry struct ... Browse Code »

    Some long time ago, dentry struct was carefully tuned so that on 32 bits
    UP, sizeof(struct dentry) was exactly 128, ie a power of 2, and a multiple
    of memory cache lines.

    Then RCU was added and dentry struct enlarged by two pointers, with nice
    results for SMP, but not so good on UP, because breaking the above tuning
    (128 + 8 = 136 bytes)

    This patch reverts this unwanted side effect, by using an union (d_u),
    where d_rcu and d_child are placed so that these two fields can share their
    memory needs.

    At the time d_free() is called (and d_rcu is really used), d_child is known
    to be empty and not touched by the dentry freeing.

    Lockless lookups only access d_name, d_parent, d_lock, d_op, d_flags (so
    the previous content of d_child is not needed if said dentry was unhashed
    but still accessed by a CPU because of RCU constraints)

    As dentry cache easily contains millions of entries, a size reduction is
    worth the extra complexity of the ugly C union.

    Signed-off-by: Eric Dumazet
    Cc: Dipankar Sarma
    Cc: Maneesh Soni
    Cc: Miklos Szeredi
    Cc: "Paul E. McKenney"
    Cc: Ian Kent
    Cc: Paul Jackson
    Cc: Al Viro
    Cc: Christoph Hellwig
    Cc: Trond Myklebust
    Cc: Neil Brown
    Cc: James Morris
    Cc: Stephen Smalley
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric Dumazet