I think register ranges obviously need to be claimed/released for all UARTs
including those with UPIO_MEM32 and UPIO_TSI iotype.

Also, serial8250_request_rsa_resources() returns false positives with
UPIO_MEM32, UPIO_AU, and UPIO_TSI iotype -- I don't think this makes any sense.
Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Mauro Ziliani reports that this card has a higher clock rate.
Rather than tweak the 8250 driver to handle this, add a quirk to
pass the correct clock rate to the driver.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

According to the existing code, Nokia only make single-port cards,
but are detected as multi-port cards.  Handle this in roughly the
same way via the config quirk - forcing it to be a real single port
card (info->multi=0) changes the way we allocate the IO memory,
which might stop the card working.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add a quirk primerily to handle tweaks to the link->conf structure,
eg as required for Socket cards.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Move the Oxford Semi OX950 / Possio GCC wakeup handling to a quirk
wakeup handler.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Move IBM quirk handling into its own quirk entry.  Note that doing
quirk handling after we've registered the ports is racy, but since
I don't know if moving this will have an undesired effect, it's
probably better to leave where it is.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Some quirks we will introduce next apply to (eg) all cards of one
manufacturer.  Therefore, we need a way to list these in the quirk
table - use ~0 - this is not a possible device ID value.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

- rename multi_id table to serial_quirk / quirks[]
- use named initialisers
- store a pointer to the quirk table in the serial_info structure
  so we can use the quirk table entry later.
- apply multi-port quirk after the multi-port guessing code,
  but only if it's != -1.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

- Use ARRAY_SIZE() instead of home grown based version.
- use parse->manfid.card rather than le16_to_cpu(buf[1]) -
  manfid.card is already converted to this format.
- use info->prodid in subsequent tests rather than
  parse->manfid.card.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

m32r_sio re-uses a custom defined BASE_BAUD from asm/serial.h,
and replaces SERIAL_PORT_DFNS with its own driver private copy.
Since asm/serial.h is supposed to define 8250-based ports using
these symbols, this isn't a sane idea.

Hence, eliminate asm/serial.h from m32r_sio.c.
Acked-by: NHirokazu Takata <takata@linux-m32r.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [ATM]: [lec] use refcnt to protect lec_arp_entries outside lock
  [ATM]: [lec] add reference counting to lec_arp entries
  [ATM]: [lec] use work queue instead of timer for lec arp expiry
  [ATM]: [lec] old_close is no longer used
  [ATM]: [lec] convert lec_arp_table to hlist
  [ATM]: [lec] header indent, comment and whitespace cleanup
  [ATM]: [lec] indent, comment and whitespace cleanup [continued]
  [ATM]: [lec] indent, comment and whitespace cleanup
  [SCTP]: Do not timestamp every SCTP packet.
  [SCTP]: Use correct mask when disabling PMTUD.
  [SCTP]: Include sk_buff overhead while updating the peer's receive window.
  [SCTP]: Enable Nagle algorithm by default.
  [BNX2]: Disable MSI on 5706 if AMD 8132 bridge is present.
  [NetLabel]: audit fixups due to delayed feedback

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We only need the timestamp on COOKIE-ECHO chunks, so instead of always
timestamping every SCTP packet, let common code timestamp if the socket
option is set.  For COOKIE-ECHO, simply get the time of day if we don't
have a timestamp.  This introduces a small possibility that the cookie
may be considered expired, but it will be renegotiated.
Signed-off-by: NVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: NSridhar Samudrala <sri@us.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: NSridhar Samudrala <sri@us.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently if the sender is sending small messages, it can cause a receiver
to run out of receive buffer space even when the advertised receive window
is still open and results in packet drops and retransmissions. Including
a overhead while updating the sender's view of peer receive window will
reduce the chances of receive buffer space overshooting the receive window.
Signed-off-by: NSridhar Samudrala <sri@us.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This allows more aggressive bundling of chunks when sending small
messages.
Signed-off-by: NSridhar Samudrala <sri@us.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MSI is defined to be 32-bit write.  The 5706 does 64-bit MSI writes
with byte enables disabled on the unused 32-bit word.  This is legal
but causes problems on the AMD 8132 which will eventually stop
responding after a while.

Without this patch, the MSI test done by the driver during open will
pass, but MSI will eventually stop working after a few MSIs are
written by the device.

AMD believes this incompatibility is unique to the 5706, and
prefers to locally disable MSI rather than globally disabling it
using pci_msi_quirk.

Update version to 1.4.45.
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix some issues Steve Grubb had with the way NetLabel was using the audit
subsystem.  This should make NetLabel more consistent with other kernel
generated audit messages specifying configuration changes.
Signed-off-by: NPaul Moore <paul.moore@hp.com>
Acked-by: NSteve Grubb <sgrubb@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Actually, since we use the same code for all the copying
types in and out of userspace, we check at runtime whether
preemption is disabled.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Accepted connections of types other than AF_INET, AF_INET6, AF_UNIX won't
have an appropriate label derived from the peer, so don't use it.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Acked-by: NStephen Smalley <sds@tycho.nsa.gov>
Acked-by: NJames Morris <jmorris@namei.org>
Acked-by: NPaul Moore <paul.moore@hp.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: (33 commits)
  IB/ipath: Fix lockdep error upon "ifconfig ibN down"
  IB/ipath: Fix races with ib_resize_cq()
  IB/ipath: Support new PCIE device, QLE7142
  IB/ipath: Set CPU affinity early
  IB/ipath: Fix EEPROM read when driver is compiled with -Os
  IB/ipath: Fix and recover TXE piobuf and PBC parity errors
  IB/ipath: Change HT CRC message to indicate how to resolve problem
  IB/ipath: Clean up module exit code
  IB/ipath: Call mtrr_del with correct arguments
  IB/ipath: Flush RWQEs if access error or invalid error seen
  IB/ipath: Improved support for PowerPC
  IB/ipath: Drop unnecessary "(void *)" casts
  IB/ipath: Support multiple simultaneous devices of different types
  IB/ipath: Fix mismatch in shifts and masks for printing debug info
  IB/ipath: Fix compiler warnings and errors on non-x86_64 systems
  IB/ipath: Print more informative parity error messages
  IB/ipath: Ensure that PD of MR matches PD of QP checking the Rkey
  IB/ipath: RC and UC should validate SLID and DLID
  IB/ipath: Only allow complete writes to flash
  IB/ipath: Count SRQs properly
  ...

* git://oss.sgi.com:8090/xfs/xfs-2.6: (49 commits)
  [XFS] Remove v1 dir trace macro - missed in a past commit.
  [XFS] 955947: Infinite loop in xfs_bulkstat() on formatter() error
  [XFS] pv 956241, author: nathans, rv: vapo - make ino validation checks
  [XFS] pv 956240, author: nathans, rv: vapo - Minor fixes in
  [XFS] Really fix use after free in xfs_iunpin.
  [XFS] Collapse sv_init and init_sv into just the one interface.
  [XFS] standardize on one sema init macro
  [XFS] Reduce endian flipping in alloc_btree, same as was done for
  [XFS] Minor cleanup from dio locking fix, remove an extra conditional.
  [XFS] Fix kmem_zalloc_greedy warnings on 64 bit platforms.
  [XFS] pv 955157, rv bnaujok - break the loop on EFAULT formatter() error
  [XFS] pv 955157, rv bnaujok - break the loop on formatter() error
  [XFS] Fixes the leak in reservation space because we weren't ungranting
  [XFS] Add lock annotations to xfs_trans_update_ail and
  [XFS] Fix a porting botch on the realtime subvol growfs code path.
  [XFS] Minor code rearranging and cleanup to prevent some coverity false
  [XFS] Remove a no-longer-correct debug assert from dio completion
  [XFS] Add a greedy allocation interface, allocating within a min/max size
  [XFS] Improve error handling for the zero-fsblock extent detection code.
  [XFS] Be more defensive with page flags (error/private) for metadata
  ...

Fix undefined reference in i2c_sibyte_exit().

   drivers/built-in.o: In function `i2c_sibyte_exit':
   i2c-sibyte.c:(.exit.text+0x368): undefined reference to `i2c_del_bus'
   i2c-sibyte.c:(.exit.text+0x368): relocation truncated to fit: R_MIPS_26 against `i2c_del_bus'
   i2c-sibyte.c:(.exit.text+0x38c): undefined reference to `i2c_del_bus'
   i2c-sibyte.c:(.exit.text+0x38c): relocation truncated to fit: R_MIPS_26 against `i2c_del_bus'
Signed-off-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix obscure race condition in kernel/cpuset.c attach_task() code.

There is basically zero chance of anyone accidentally being harmed by this
race.

It requires a special 'micro-stress' load and a special timing loop hacks
in the kernel to hit in less than an hour, and even then you'd have to hit
it hundreds or thousands of times, followed by some unusual and senseless
cpuset configuration requests, including removing the top cpuset, to cause
any visibly harm affects.

One could, with perhaps a few days or weeks of such effort, get the
reference count on the top cpuset below zero, and manage to crash the
kernel by asking to remove the top cpuset.

I found it by code inspection.

The race was introduced when 'the_top_cpuset_hack' was introduced, and one
piece of code was not updated.  An old check for a possibly null task
cpuset pointer needed to be changed to a check for a task marked
PF_EXITING.  The pointer can't be null anymore, thanks to
the_top_cpuset_hack (documented in kernel/cpuset.c).  But the task could
have gone into PF_EXITING state after it was found in the task_list scan.

If a task is PF_EXITING in this code, it is possible that its task->cpuset
pointer is pointing to the top cpuset due to the_top_cpuset_hack, rather
than because the top_cpuset was that tasks last valid cpuset.  In that
case, the wrong cpuset reference counter would be decremented.

The fix is trivial.  Instead of failing the system call if the tasks cpuset
pointer is null here, fail it if the task is in PF_EXITING state.

The code for 'the_top_cpuset_hack' that changes an exiting tasks cpuset to
the top_cpuset is done without locking, so could happen at anytime.  But it
is done during the exit handling, after the PF_EXITING flag is set.  So if
we verify that a task is still not PF_EXITING after we copy out its cpuset
pointer (into 'oldcs', below), we know that 'oldcs' is not one of these
hack references to the top_cpuset.
Signed-off-by: NPaul Jackson <pj@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add a note about "format=flowed" when sending patches and explain how to
fix mozilla.  Thunderbird has the similar options.
Signed-off-by: NKirill Korotaev <dev@openvz.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

With CONFIG_DEBUG_LOCK_ALLOC turned off i was getting sporadic failures in
the locking self-test:

  ------------>
  | Locking API testsuite:
  ----------------------------------------------------------------------------
                                   | spin |wlock |rlock |mutex | wsem | rsem |
    --------------------------------------------------------------------------
                       A-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
                   A-B-B-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
               A-B-B-C-C-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
               A-B-C-A-B-C deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
           A-B-B-C-C-D-D-A deadlock:  ok  |FAILED|  ok  |  ok  |  ok  |  ok  |
           A-B-C-D-B-D-D-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |
           A-B-C-D-B-C-D-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |FAILED|

after much debugging it turned out to be caused by accidental chain-hash
key collisions.  The current hash is:

 #define iterate_chain_key(key1, key2) \
	(((key1) << MAX_LOCKDEP_KEYS_BITS/2) ^ \
	((key1) >> (64-MAX_LOCKDEP_KEYS_BITS/2)) ^ \
 	(key2))

where MAX_LOCKDEP_KEYS_BITS is 11.  This hash is pretty good as it will
shift by 5 bits in every iteration, where every new ID 'mixed' into the
hash would have up to 11 bits.  But because there was a 6 bits overlap
between subsequent IDs and their high bits tended to be similar, there was
a chance for accidental chain-hash collision for a low number of locks
held.

the solution is to shift by 11 bits:

 #define iterate_chain_key(key1, key2) \
	(((key1) << MAX_LOCKDEP_KEYS_BITS) ^ \
	((key1) >> (64-MAX_LOCKDEP_KEYS_BITS)) ^ \
 	(key2))

This keeps the hash perfect up to 5 locks held, but even above that the
hash is still good because 11 bits is a relative prime to the total 64
bits, so a complete match will only occur after 64 held locks (which doesnt
happen in Linux).  Even after 5 locks held, entropy of the 5 IDs mixed into
the hash is already good enough so that overlap doesnt generate a colliding
hash ID.

with this change the false positives went away.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

o As per ELF specifications, it looks like that elf note "namesz" field
  contains the length of "name" including the size of null character.  And
  currently we are filling "namesz" without taking into the consideration
  the null character size.

o Kexec-tools performs this check deligently hence I ran into the issue
  while trying to open /proc/kcore in kexec-tools for some info.
Signed-off-by: NVivek Goyal <vgoyal@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This unlock/lock on a super-unlikely path isn't worth the kernel text.

Cc: Vadim Lobanov <vlobanov@speakeasy.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Perform a code cleanup against the expand_fdtable() and expand_files()
functions inside fs/file.c.  It aims to make the flow of code within these
functions simpler and easier to understand, via added comments and modest
refactoring.
Signed-off-by: NVadim Lobanov <vlobanov@speakeasy.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* fix copright typo
* remove trailing whitespace
* remove Kernel Traffic from Resources. Zack, it was great reading!
* Name Arjan by name and fix URL of "How to NOT" paper.
* Remove "Last updated" tag.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add tty locking around the audit and accounting code.

The whole current->signal-> locking is all deeply strange but it's for
someone else to sort out.  Add rather than replace the lock for acct.c
Signed-off-by: NAlan Cox <alan@redhat.com>
Acked-by: NArjan van de Ven <arjan@linux.intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>