This patch moves the multiplexing switch counter from x86 code to
common oprofile statistic variables. Now the value will be available
and usable for all architectures. The initialization and
incrementation also moved to common code.

Signed-off-by: Robert Richter <robert.richter@amd.com>

To setup a counter for all cpus, its structure is cloned from cpu
0. This patch implements mux_clone() to do this part for multiplexing
data.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch checks if the model supports multiplexing. Only then
multiplexing will be enabled. The code is added to the common x86
initialization.

Signed-off-by: Robert Richter <robert.richter@amd.com>

The check is used to prevent running multiplexing code for models not
supporting multiplexing. Before, the code was running but without
effect.

Signed-off-by: Robert Richter <robert.richter@amd.com>

Models that do not yet support counter multiplexing have to setup
num_virt_counters. This patch implements the setup from num_counters
if num_virt_counters is not set. Thus, num_virt_counters must be setup
only for multiplexing support.

Signed-off-by: Robert Richter <robert.richter@amd.com>

The member num_virt_controls of struct op_x86_model_spec is not
used. This patch removes it.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch removes the const qualifier from struct
op_x86_model_spec to make model parameters changable.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch moves some code in nmi_int.c to get a single separate
multiplexing code section.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch moves some code in nmi_int.c to get a single separate
multiplexing code section.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch moves some code in nmi_int.c to get a single separate
multiplexing code section.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch implements nmi_setup_mux() and nmi_shutdown_mux() functions
to setup/shutdown multiplexing. Multiplexing code in nmi_int.c is now
much more separated.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch moves some multiplexing code to the new function
op_mux_fill_in_addresses(). Also, the whole multiplexing code is now
at a single location.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This new function translates physical to virtual counter numbers.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch moves multiplexing code to a single section of code. This
reduces the use of #ifdefs especially within functions.

Signed-off-by: Robert Richter <robert.richter@amd.com>

oprofile_multiplexing_init() can be removed when moving the
initialization of oprofile_time_slice to oprofile_create_files().

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch renames timeout_jiffies into an oprofile specific name. The
macro MULTIPLEXING_TIMER_DEFAULT is changed too.

Also, since this variable is controlled using oprofilefs, its
definition is moved to oprofile_files.c.

Signed-off-by: Robert Richter <robert.richter@amd.com>

Return with -EINVAL for invalid parameters instead of setting the
default value in oprofile_set_timeout().

Signed-off-by: Robert Richter <robert.richter@amd.com>

Variable switch_index must be initialized for each cpu. This patch
fixes the initialization by moving it to the per-cpu init function
nmi_cpu_setup().

Signed-off-by: Robert Richter <robert.richter@amd.com>

__get_cpu_var() calls smp_processor_id(). When the cpu id is already
known, instead use per_cpu() to avoid generating the id again.

Signed-off-by: Robert Richter <robert.richter@amd.com>

Use the corresponding macros when iterating over counter and control
registers. Since NUM_CONTROLS and NUM_COUNTERS are equal for AMD cpus
the fix is more a cosmetical change.

Signed-off-by: Robert Richter <robert.richter@amd.com>

The number of hardware counters is limited. The multiplexing feature
enables OProfile to gather more events than counters are provided by
the hardware. This is realized by switching between events at an user
specified time interval.

A new file (/dev/oprofile/time_slice) is added for the user to specify
the timer interval in ms. If the number of events to profile is higher
than the number of hardware counters available, the patch will
schedule a work queue that switches the event counter and re-writes
the different sets of values into it. The switching mechanism needs to
be implemented for each architecture to support multiplexing. This
patch only implements AMD CPU support, but multiplexing can be easily
extended for other models and architectures.

There are follow-on patches that rework parts of this patch.

Signed-off-by: Jason Yeh <jason.yeh@amd.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch fixes whitespace changes of code that will be touched in
follow-on patches.

Signed-off-by: Robert Richter <robert.richter@amd.com>

This patch removes the function nmi_save_registers(). Per-cpu code is
now executed only in the function nmi_cpu_setup().  Also, it renames
the per-cpu function nmi_restore_registers() to
nmi_cpu_restore_registers().

Signed-off-by: Robert Richter <robert.richter@amd.com>

When casting the counter value to a 64 bit value in 32 bit mode, sign
extension may lead to broken counter values. This patch fixes this by
casting to (u64) instead of (s64).

Signed-off-by: Robert Richter <robert.richter@amd.com>

Conflicts:
	drivers/oprofile/oprofile_stats.c
	drivers/usb/otg/Kconfig
	drivers/usb/otg/Makefile

Signed-off-by: Robert Richter <robert.richter@amd.com>

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  jbd2: fix race between write_metadata_buffer and get_write_access
  ext4: Fix ext4_mb_initialize_context() to initialize all fields
  ext4: fix null handler of ioctls in no journal mode
  ext4: Fix buffer head reference leak in no-journal mode
  ext4: Move __ext4_journalled_writepage() to avoid forward declaration
  ext4: Fix mmap/truncate race when blocksize < pagesize && !nodellaoc
  ext4: Fix mmap/truncate race when blocksize < pagesize && delayed allocation
  ext4: Don't look at buffer_heads outside i_size.
  ext4: Fix goal inum check in the inode allocator
  ext4: fix no journal corruption with locale-gen
  ext4: Calculate required journal credits for inserting an extent properly
  ext4: Fix truncation of symlinks after failed write
  jbd2: Fix a race between checkpointing code and journal_get_write_access()
  ext4: Use rcu_barrier() on module unload.
  ext4: naturally align struct ext4_allocation_request
  ext4: mark several more functions in mballoc.c as noinline
  ext4: Fix potential reclaim deadlock when truncating partial block
  jbd2: Remove GFP_ATOMIC kmalloc from inside spinlock critical region
  ext4: Fix type warning on 64-bit platforms in tracing events header

The function jbd2_journal_write_metadata_buffer() calls
jbd_unlock_bh_state(bh_in) too early; this could potentially allow
another thread to call get_write_access on the buffer head, modify the
data, and dirty it, and allowing the wrong data to be written into the
journal.  Fortunately, if we lose this race, the only time this will
actually cause filesystem corruption is if there is a system crash or
other unclean shutdown of the system before the next commit can take
place.

Signed-off-by: dingdinghua <dingdinghua85@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: stlc45xx: convert config_interface to bss_info_changed, fixing a build error
  Staging: comedi: s626: use subvendor:subdevice ids for SAA7146 board
  Staging: prevent rtl8192su from crashing dev_ioctl in SIOCGIWNAME
  Staging: prevent rtl8187se from crashing dev_ioctl() in SIOCGIWNAME
  Staging: rtl8192su: convert to net_device_ops
  Staging: serqt_usb2: declare qt_open static in serqt_usb2
  Staging: serqt_usb2: fix qt_close parameters in serqt_usb2
  Staging: comedi: jr3_pci.c: add required includes
  Staging: meilhaus: add email address to TODO
  Staging: rspiusb: use NULL virtual address instead of a bogus one
  Staging: vt6655: compile fix
  Staging: rt2870: Add USB ID for Sitecom WL-608

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  wm97xx_batery: replace driver_data with dev_get_drvdata()
  omap: video: remove direct access of driver_data
  Sound: remove direct access of driver_data
  driver model: fix show/store prototypes in doc.
  Firmware: firmware_class, fix lock imbalance
  Driver Core: remove BUS_ID_SIZE
  sparc: remove driver-core BUS_ID_SIZE
  partitions: fix broken uevent_suppress conversion
  devres: WARN() and return, don't crash on device_del() of uninitialized device

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (48 commits)
  USB: otg: fix module reinsert issue
  USB: handle zero-length usbfs submissions correctly
  USB: EHCI: report actual_length for iso transfers
  USB: option: remove unnecessary and erroneous code
  USB: cypress_m8: remove invalid Clear-Halt
  USB: musb_host: undo incorrect change in musb_advance_schedule()
  USB: fix LANGID=0 regression
  USB: serial: sierra driver id_table additions
  USB serial: Add ID for Turtelizer, an FT2232L-based JTAG/RS-232 adapter.
  USB: fix race leading to a write after kfree in usbfs
  USB: Sierra: fix oops upon device close
  USB: option.c: add A-Link 3GU device id
  USB: Serial: Add support for Arkham Technology adapters
  USB: Fix option_ms regression in 2.6.31-rc2
  USB: gadget audio: select SND_PCM
  USB: ftdi: support NDI devices
  Revert USB: usbfs: deprecate and hide option for !embedded
  USB: usb.h: fix kernel-doc notation
  USB: RNDIS gadget, fix issues talking from PXA
  USB: serial: FTDI with product code FB80 and vendor id 0403
  ...

JFS hasn't really been supported for a while.  It's still maintained,
but saying it's supported is a stretch.  Updating my preferred email
address as well.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Remove duplicated #include('s) in
  arch/mn10300/kernel/sys_mn10300.c

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit 405f5571

 ("headers: smp_lock.h
redux") broke the build of two staging drivers. Fix them.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pavel Roskin pointed out that kmemcheck indicated that
ext4_mb_store_history() was accessing uninitialized values of
ac->ac_tail and ac->ac_buddy leading to garbage in the mballoc
history.  Fix this by initializing the entire structure to all zeros
first.

Also, two fields were getting doubly initialized by the caller of
ext4_mb_initialize_context, so remove them for efficiency's sake.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

The EXT4_IOC_GROUP_ADD and EXT4_IOC_GROUP_EXTEND ioctls should not
flush the journal in no_journal mode.  Otherwise, running resize2fs on
a mounted no_journal partition triggers the following error messages:

BUG: unable to handle kernel NULL pointer dereference at 00000014
IP: [<c039d282>] _spin_lock+0x8/0x19
*pde = 00000000 
Oops: 0002 [#1] SMP

Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

We found a problem with buffer head reference leaks when using an ext4
partition without a journal.  In particular, calls to ext4_forget() would
not to a brelse() on the input buffer head, which will cause pages they
belong to to not be reclaimable.

Further investigation showed that all places where ext4_journal_forget() and
ext4_journal_revoke() are called are subject to the same problem.  The patch
below changes __ext4_journal_forget/__ext4_journal_revoke to do an explicit
release of the buffer head when the journal handle isn't valid.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

Platform_device instance (pd) is not set to NULL in
usb_nop_xceiv_unregister() causing usb_nop_xceiv_register()
to fail during module reinsert.

From: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Babu Ravi <ravibabu@ti.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>

This patch (as1262) fixes a bug in usbfs: It refuses to accept
zero-length transfers, and it insists that the buffer pointer be valid
even if there is no data being transferred.

The patch also consolidates a bunch of repetitive access_ok() checks
into a single check, which incidentally fixes the lack of such a check
for Isochronous URBs.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

This patch (as1259b) makes ehci-hcd return the total number of bytes
transferred in urb->actual_length for Isochronous transfers.
Until now, the actual_length value was unaccountably left at 0.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>