This code just moves the PLL min/max calculations variables into
a structure, it doesn't change or add any new functionality.
Signed-off-by: Dave Airlie <airlied@linux.ie>
Originally from Nick Piggin, just adapted to the newer branch.
You can't check PageLRU without holding zone->lru_lock. The page
release code can get away with it only because the page refcount is 0 at
that point. Also, you can't reliably remove pages from the LRU unless
the refcount is 0. Ever.
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Jens Axboe <axboe@suse.de>
Thanks to Andrew for the good explanation of why this is so. akpm writes:
If a page is under writeback and we remove it from pagecache, it's still
going to get written to disk. But the VFS no longer knows about that page,
nor that this page is about to modify disk blocks.
So there might be scenarios in which those
blocks-which-are-about-to-be-written-to get reused for something else.
When writeback completes, it'll scribble on those blocks.
This won't happen in ext2/ext3-style filesystems in normal mode because the
page has buffers and try_to_release_page() will fail.
But ext2 in nobh mode doesn't attach buffers at all - it just sticks the
page in a BIO, finds some new blocks, points the BIO at those blocks and
lets it rip.
While that write IO's in flight, someone could truncate the file. Truncate
won't block on the writeout because the page isn't in pagecache any more.
So truncate will the free the blocks from the file under the page's feet.
Then something else can reallocate those blocks. Then write data to them.
Now, the original write completes, corrupting the filesystem.
Signed-off-by: Jens Axboe <axboe@suse.de>
By cleaning up the writeback logic (killing write_one_page() and the manual
set_page_dirty()), we can get rid of ->stolen inside the pipe_buffer and
just keep it local in pipe_to_file().
This also adds dirty page balancing logic and O_SYNC handling.
Signed-off-by: Jens Axboe <axboe@suse.de>
Clear the entire range, and don't increment pidx or we keep filling
the same position again and again.
Thanks to KAMEZAWA Hiroyuki.
Signed-off-by: Jens Axboe <axboe@suse.de>
* git://oss.sgi.com:8090/oss/git/xfs-2.6:
[XFS] Provide XFS support for the splice syscall.
[XFS] Reenable write barriers by default.
[XFS] Make project quota enforcement return an error code consistent with
[XFS] Implement the silent parameter to fill_super, previously ignored.
[XFS] Cleanup comment to remove reference to obsoleted function
* master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: (28 commits)
[ALSA] Kconfig SND_SEQUENCER_OSS help text fix
[ALSA] Add Aux input switch control for Aureon Universe
[ALSA] pcxhr - Fix the crash with REV01 board
[ALSA] sound/pci/hda: use create_singlethread_workqueue()
[ALSA] hda-intel - Add support of ATI SB600
[ALSA] cs4281 - Fix the check of timeout in probe
[ALSA] cs4281 - Fix the check of right channel
[ALSA] Test volume resolution of usb audio at initialization
[ALSA] maestro3.c: fix BUG, optimization
[ALSA] HDA/Realtek: multiple input mux definitions and pin mode additions
[ALSA] AdLib FM card driver
[ALSA] Fix / clean up PCM-OSS setup hooks
[ALSA] Clean up PCM codes (take 2)
[ALSA] Tiny clean up of PCM codes
[ALSA] ISA drivers bailing on first !enable[i]
[ALSA] Remove obsolete kfree_nocheck call
[ALSA] Remove obsolete kfree_nocheck call
[ALSA] Add snd-als300 driver for Avance Logic ALS300/ALS300+ soundcards
[ALSA] Add snd-riptide driver for Conexant Riptide chip
[ALSA] hda-codec - Fix noisy output wtih AD1986A 3stack model
...
No one should be writing a PAGE_SIZE worth of data to a normal sysfs
file, so properly terminate the buffer.
Thanks to Al Viro for pointing out my supidity here.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This reverts the mutex conversion that was recently done to the hdaps
driver; this coversion was buggy because the hdaps driver started using
this semaphore in IRQ context, which mutexes do not allow. Easiest
solution for now is to just revert the patch (the patch was part of a
bigger GIT commit, 9a61bf6300 but this
only reverts this one file)
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (48 commits)
Documentation: fix minor kernel-doc warnings
BUG_ON() Conversion in drivers/net/
BUG_ON() Conversion in drivers/s390/net/lcs.c
BUG_ON() Conversion in mm/slab.c
BUG_ON() Conversion in mm/highmem.c
BUG_ON() Conversion in kernel/signal.c
BUG_ON() Conversion in kernel/signal.c
BUG_ON() Conversion in kernel/ptrace.c
BUG_ON() Conversion in ipc/shm.c
BUG_ON() Conversion in fs/freevxfs/
BUG_ON() Conversion in fs/udf/
BUG_ON() Conversion in fs/sysv/
BUG_ON() Conversion in fs/inode.c
BUG_ON() Conversion in fs/fcntl.c
BUG_ON() Conversion in fs/dquot.c
BUG_ON() Conversion in md/raid10.c
BUG_ON() Conversion in md/raid6main.c
BUG_ON() Conversion in md/raid5.c
Fix minor documentation typo
BFP->BPF in Documentation/networking/tuntap.txt
...
