Eric Lee / smarc-fsl-linux-kernel

14 Jan, 2012

1 commit

04 Jan, 2012

1 commit

  • ff01bb483   fs: move code out of buffer.c ... Browse Code »

    Move invalidate_bdev, block_sync_page into fs/block_dev.c. Export
    kill_bdev as well, so brd doesn't have to open code it. Reduce
    buffer_head.h requirement accordingly.

    Removed a rather large comment from invalidate_bdev, as it looked a bit
    obsolete to bother moving. The small comment replacing it says enough.

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

    Al Viro
     

17 Oct, 2011

1 commit

14 Jan, 2011

1 commit

  • 275220f0f   Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block ... Browse Code »

    * 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block: (43 commits)
    block: ensure that completion error gets properly traced
    blktrace: add missing probe argument to block_bio_complete
    block cfq: don't use atomic_t for cfq_group
    block cfq: don't use atomic_t for cfq_queue
    block: trace event block fix unassigned field
    block: add internal hd part table references
    block: fix accounting bug on cross partition merges
    kref: add kref_test_and_get
    bio-integrity: mark kintegrityd_wq highpri and CPU intensive
    block: make kblockd_workqueue smarter
    Revert "sd: implement sd_check_events()"
    block: Clean up exit_io_context() source code.
    Fix compile warnings due to missing removal of a 'ret' variable
    fs/block: type signature of major_to_index(int) to major_to_index(unsigned)
    block: convert !IS_ERR(p) && p to !IS_ERR_NOR_NULL(p)
    cfq-iosched: don't check cfqg in choose_service_tree()
    fs/splice: Pull buf->ops->confirm() from splice_from_pipe actors
    cdrom: export cdrom_check_events()
    sd: implement sd_check_events()
    sr: implement sr_check_events()
    ...

    Linus Torvalds
     

23 Dec, 2010

1 commit

17 Dec, 2010

1 commit

  • be8cd644c   PM / Hibernate: Restore old swap signature to avoid user space breakage ... Browse Code »

    Commit 3624eb0 (PM / Hibernate: Modify signature used to mark swap)
    attempted to modify hibernate signature used to mark swap partitions
    containing hibernation images, so that old kernels don't try to
    handle compressed images. However, this change broke resume from
    hibernation on Fedora 14 that apparently doesn't pass the resume=
    argument to the kernel and tries to trigger resume from early user
    space. This doesn't work, because the signature is now different,
    so the old signature has to be restored to avoid the problem.

    Addresses https://bugzilla.kernel.org/show_bug.cgi?id=22732 .

    Reported-by: Dr. David Alan Gilbert
    Reported-by: Zhang Rui
    Reported-by: Pascal Chapperon
    Signed-off-by: Rafael J. Wysocki

    Rafael J. Wysocki
     

07 Dec, 2010

1 commit

  • 9f339caf8   PM / Hibernate: Use async I/O when reading compressed hibernation image ... Browse Code »

    This is a fix for reading LZO compressed image using async I/O.
    Essentially, instead of having just one page into which we keep
    reading blocks from swap, we allocate enough of them to cover the
    largest compressed size and then let block I/O pick them all up. Once
    we have them all (and here we wait), we decompress them, as usual.
    Obviously, the very first block we still pick up synchronously,
    because we need to know the size of the lot before we pick up the
    rest.

    Also fixed the copyright line, which I've forgotten before.

    Signed-off-by: Bojan Smojver
    Signed-off-by: Rafael J. Wysocki

    Bojan Smojver
     

13 Nov, 2010

2 commits

  • d4d776299   block: clean up blkdev_get() wrappers and their users ... Browse Code »

    After recent blkdev_get() modifications, open_by_devnum() and
    open_bdev_exclusive() are simple wrappers around blkdev_get().
    Replace them with blkdev_get_by_dev() and blkdev_get_by_path().

    blkdev_get_by_dev() is identical to open_by_devnum().
    blkdev_get_by_path() is slightly different in that it doesn't
    automatically add %FMODE_EXCL to @mode.

    All users are converted. Most conversions are mechanical and don't
    introduce any behavior difference. There are several exceptions.

    * btrfs now sets FMODE_EXCL in btrfs_device->mode, so there's no
    reason to OR it explicitly on blkdev_put().

    * gfs2, nilfs2 and the generic mount_bdev() now set FMODE_EXCL in
    sb->s_mode.

    * With the above changes, sb->s_mode now always should contain
    FMODE_EXCL. WARN_ON_ONCE() added to kill_block_super() to detect
    errors.

    The new blkdev_get_*() functions are with proper docbook comments.
    While at it, add function description to blkdev_get() too.

    Signed-off-by: Tejun Heo
    Cc: Philipp Reisner
    Cc: Neil Brown
    Cc: Mike Snitzer
    Cc: Joern Engel
    Cc: Chris Mason
    Cc: Jan Kara
    Cc: "Theodore Ts'o"
    Cc: KONISHI Ryusuke
    Cc: reiserfs-devel@vger.kernel.org
    Cc: xfs-masters@oss.sgi.com
    Cc: Alexander Viro

    Tejun Heo
     
  • e525fd89d   block: make blkdev_get/put() handle exclusive access ... Browse Code »
    43

    Over time, block layer has accumulated a set of APIs dealing with bdev
    open, close, claim and release.

    * blkdev_get/put() are the primary open and close functions.

    * bd_claim/release() deal with exclusive open.

    * open/close_bdev_exclusive() are combination of open and claim and
    the other way around, respectively.

    * bd_link/unlink_disk_holder() to create and remove holder/slave
    symlinks.

    * open_by_devnum() wraps bdget() + blkdev_get().

    The interface is a bit confusing and the decoupling of open and claim
    makes it impossible to properly guarantee exclusive access as
    in-kernel open + claim sequence can disturb the existing exclusive
    open even before the block layer knows the current open if for another
    exclusive access. Reorganize the interface such that,

    * blkdev_get() is extended to include exclusive access management.
    @holder argument is added and, if is @FMODE_EXCL specified, it will
    gain exclusive access atomically w.r.t. other exclusive accesses.

    * blkdev_put() is similarly extended. It now takes @mode argument and
    if @FMODE_EXCL is set, it releases an exclusive access. Also, when
    the last exclusive claim is released, the holder/slave symlinks are
    removed automatically.

    * bd_claim/release() and close_bdev_exclusive() are no longer
    necessary and either made static or removed.

    * bd_link_disk_holder() remains the same but bd_unlink_disk_holder()
    is no longer necessary and removed.

    * open_bdev_exclusive() becomes a simple wrapper around lookup_bdev()
    and blkdev_get(). It also has an unexpected extra bdev_read_only()
    test which probably should be moved into blkdev_get().

    * open_by_devnum() is modified to take @holder argument and pass it to
    blkdev_get().

    Most of bdev open/close operations are unified into blkdev_get/put()
    and most exclusive accesses are tested atomically at the open time (as
    it should). This cleans up code and removes some, both valid and
    invalid, but unnecessary all the same, corner cases.

    open_bdev_exclusive() and open_by_devnum() can use further cleanup -
    rename to blkdev_get_by_path() and blkdev_get_by_devt() and drop
    special features. Well, let's leave them for another day.

    Most conversions are straight-forward. drbd conversion is a bit more
    involved as there was some reordering, but the logic should stay the
    same.

    Signed-off-by: Tejun Heo
    Acked-by: Neil Brown
    Acked-by: Ryusuke Konishi
    Acked-by: Mike Snitzer
    Acked-by: Philipp Reisner
    Cc: Peter Osterlund
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Jan Kara
    Cc: Andrew Morton
    Cc: Andreas Dilger
    Cc: "Theodore Ts'o"
    Cc: Mark Fasheh
    Cc: Joel Becker
    Cc: Alex Elder
    Cc: Christoph Hellwig
    Cc: dm-devel@redhat.com
    Cc: drbd-dev@lists.linbit.com
    Cc: Leo Chen
    Cc: Scott Branden
    Cc: Chris Mason
    Cc: Steven Whitehouse
    Cc: Dave Kleikamp
    Cc: Joern Engel
    Cc: reiserfs-devel@vger.kernel.org
    Cc: Alexander Viro

    Tejun Heo
     

02 Nov, 2010

1 commit

  • b595076a1   tree-wide: fix comment/printk typos ... Browse Code »

    "gadget", "through", "command", "maintain", "maintain", "controller", "address",
    "between", "initiali[zs]e", "instead", "function", "select", "already",
    "equal", "access", "management", "hierarchy", "registration", "interest",
    "relative", "memory", "offset", "already",

    Signed-off-by: Uwe Kleine-König
    Signed-off-by: Jiri Kosina

    Uwe Kleine-König
     

27 Oct, 2010

1 commit

17 Oct, 2010

3 commits

  • 3624eb04c   PM / Hibernate: Modify signature used to mark swap ... Browse Code »

    Since we are adding compression to the kernel's hibernate code,
    change signature used by it to mark swap spaces, so that earlier
    kernels don't attempt to restore compressed images they cannot
    handle.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek

    Rafael J. Wysocki
     
  • d0941ead3   PM / Hibernate: Make some boot messages look less scary ... Browse Code »

    The hibernate resume code checks if there is an image to resume from
    on every boot and, if the kernel is built with CONFIG_PM_DEBUG set
    and the image is not present, it prints some scary messages
    suggesting there was a boot error of some sort. Apparently, some
    users are confused by them, so make them look less scary and adjust
    the other hibernate resume debug messages to match them.

    Signed-off-by: Rafael J. Wysocki

    Rafael J. Wysocki
     
  • f996fc967   PM / Hibernate: Compress hibernation image with LZO ... Browse Code »

    Compress hibernation image with LZO in order to save on I/O and
    therefore time to hibernate/thaw.

    [rjw: Added hibernate=nocompress command line option instead of just
    nocompress which would be confusing, fixed a couple of compiler
    warnings, fixed kerneldoc comments, minor cleanups.]

    Signed-off-by: Bojan Smojver
    Signed-off-by: Rafael J. Wysocki

    Bojan Smojver
     

10 Sep, 2010

1 commit

  • 910321ea8   swap: revert special hibernation allocation ... Browse Code »

    Please revert 2.6.36-rc commit d2997b1042ec150616c1963b5e5e919ffd0b0ebf
    "hibernation: freeze swap at hibernation". It complicated matters by
    adding a second swap allocation path, just for hibernation; without in any
    way fixing the issue that it was intended to address - page reclaim after
    fixing the hibernation image might free swap from a page already imaged as
    swapcache, letting its swap be reallocated to store a different page of
    the image: resulting in data corruption if the imaged page were freed as
    clean then swapped back in. Pages freed to si->swap_map were still in
    danger of being reallocated by the alternative allocation path.

    I guess it inadvertently fixed slow SSD swap allocation for hibernation,
    as reported by Nigel Cunningham: by missing out the discards that occur on
    the usual swap allocation path; but that was unintentional, and needs a
    separate fix.

    Signed-off-by: Hugh Dickins
    Cc: KAMEZAWA Hiroyuki
    Cc: KOSAKI Motohiro
    Cc: "Rafael J. Wysocki"
    Cc: Ondrej Zary
    Cc: Andrea Gelmini
    Cc: Balbir Singh
    Cc: Andrea Arcangeli
    Cc: Nigel Cunningham
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Hugh Dickins
     

10 Aug, 2010

1 commit

  • d2997b104   hibernation: freeze swap at hibernation ... Browse Code »

    When taking a memory snapshot in hibernate_snapshot(), all (directly
    called) memory allocations use GFP_ATOMIC. Hence swap misusage during
    hibernation never occurs.

    But from a pessimistic point of view, there is no guarantee that no page
    allcation has __GFP_WAIT. It is better to have a global indication "we
    enter hibernation, don't use swap!".

    This patch tries to freeze new-swap-allocation during hibernation. (All
    user processes are frozenm so swapin is not a concern).

    This way, no updates will happen to swap_map[] between
    hibernate_snapshot() and save_image(). Swap is thawed when swsusp_free()
    is called. We can be assured that swap corruption will not occur.

    Signed-off-by: KAMEZAWA Hiroyuki
    Cc: "Rafael J. Wysocki"
    Cc: Hugh Dickins
    Cc: KOSAKI Motohiro
    Cc: Ondrej Zary
    Cc: Balbir Singh
    Cc: Andrea Arcangeli
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    KAMEZAWA Hiroyuki
     

05 Aug, 2010

1 commit

  • 3cfc2c42c   Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial ... Browse Code »

    * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (48 commits)
    Documentation: update broken web addresses.
    fix comment typo "choosed" -> "chosen"
    hostap:hostap_hw.c Fix typo in comment
    Fix spelling contorller -> controller in comments
    Kconfig.debug: FAIL_IO_TIMEOUT: typo Faul -> Fault
    fs/Kconfig: Fix typo Userpace -> Userspace
    Removing dead MACH_U300_BS26
    drivers/infiniband: Remove unnecessary casts of private_data
    fs/ocfs2: Remove unnecessary casts of private_data
    libfc: use ARRAY_SIZE
    scsi: bfa: use ARRAY_SIZE
    drm: i915: use ARRAY_SIZE
    drm: drm_edid: use ARRAY_SIZE
    synclink: use ARRAY_SIZE
    block: cciss: use ARRAY_SIZE
    comment typo fixes: charater => character
    fix comment typos concerning "challenge"
    arm: plat-spear: fix typo in kerneldoc
    reiserfs: typo comment fix
    update email address
    ...

    Linus Torvalds
     

19 Jul, 2010

2 commits

11 May, 2010

4 commits

  • 6f612af57   PM / Hibernate: Group swap ops ... Browse Code »

    Move all the swap processing into one function. It will make swap
    calls from a non-swap code easier.

    Signed-off-by: Jiri Slaby
    Signed-off-by: Rafael J. Wysocki

    Jiri Slaby
     
  • 51fb352b2   PM / Hibernate: Move the first_sector out of swsusp_write ... Browse Code »

    The first sector knowledge is swap-only specific. Move it into the
    swap handle. This will be needed for later non-swap specific code
    moving into snapshot.c.

    Signed-off-by: Jiri Slaby
    Acked-by: Pavel Machek
    Signed-off-by: "Rafael J. Wysocki"

    Jiri Slaby
     
  • 8a0d613fa   PM / Hibernate: Separate block_io ... Browse Code »

    Move block I/O operations to a separate file. It is because it will
    be used later not only by the swap writer.

    Signed-off-by: Jiri Slaby
    Signed-off-by: Rafael J. Wysocki

    Jiri Slaby
     
  • d3c1b24c5   PM / Hibernate: Snapshot cleanup ... Browse Code »

    Remove support of reads with offset. This means snapshot_read/write_next
    now does not accept count parameter. It allows to clean up the functions
    and snapshot handle which no longer needs to care about offsets.

    /dev/snapshot handler is converted to simple_{read_from,write_to}_buffer
    which take care of offsets.

    Signed-off-by: Jiri Slaby
    Acked-by: Pavel Machek
    Signed-off-by: Rafael J. Wysocki

    Jiri Slaby
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

27 Feb, 2010

1 commit

06 Dec, 2009

2 commits

03 Nov, 2009

3 commits

  • bf9fd67a0   PM / Hibernate: Add newline to load_image() fail path ... Browse Code »

    Finish a line by \n when load_image fails in the middle of loading.

    Signed-off-by: Jiri Slaby
    Acked-by: Pavel Machek
    Signed-off-by: Rafael J. Wysocki

    Jiri Slaby
     
  • 4ff277f9e   PM / Hibernate: Fix error handling in save_image() ... Browse Code »

    There are too many retval variables in save_image(). Thus error return
    value from snapshot_read_next() may be ignored and only part of the
    snapshot (successfully) written.

    Remove 'error' variable, invert the condition in the do-while loop
    and convert the loop to use only 'ret' variable.

    Switch the rest of the function to consider only 'ret'.

    Also make sure we end printed line by \n if an error occurs.

    Signed-off-by: Jiri Slaby
    Acked-by: Pavel Machek
    Signed-off-by: Rafael J. Wysocki

    Jiri Slaby
     
  • 76b57e613   PM / Hibernate: Fix blkdev refleaks ... Browse Code »

    While cruising through the swsusp code I found few blkdev reference
    leaks of resume_bdev.

    swsusp_read: remove blkdev_put altogether. Some fail paths do
    not do that.
    swsusp_check: make sure we always put a reference on fail paths
    software_resume: all fail paths between swsusp_check and swsusp_read
    omit swsusp_close. Add it in those cases. And since
    swsusp_read doesn't drop the reference anymore, do
    it here unconditionally.

    [rjw: Fixed a small coding style issue.]

    Signed-off-by: Jiri Slaby
    Signed-off-by: Rafael J. Wysocki

    Jiri Slaby
     

24 Sep, 2009

1 commit

  • 2bcd57ab6   headers: utsname.h redux ... Browse Code »

    * remove asm/atomic.h inclusion from linux/utsname.h --
    not needed after kref conversion
    * remove linux/utsname.h inclusion from files which do not need it

    NOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however
    due to some personality stuff it _is_ needed -- cowardly leave ELF-related
    headers and files alone.

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

    Alexey Dobriyan
     

15 Apr, 2009

1 commit

18 Feb, 2009

1 commit

04 Dec, 2008

1 commit

21 Oct, 2008

3 commits

24 Aug, 2008

1 commit

02 Feb, 2008

2 commits