The scheduler on Andreas Friedrich's hyperthreading system stopped
working properly: the scheduler would never move tasks to another CPU!
The lask known working kernel was 2.6.8.

After a couple of attempts to corner the bug, the following smoking gun
was found:

  BIOS reported wrong ACPI idfor the processor
  CPU#1: set_cpus_allowed(), swapper:1, 3 -> 2
   [<c0103bbe>] show_trace_log_lvl+0x34/0x4a
   [<c0103ceb>] show_trace+0x2c/0x2e
   [<c01045f8>] dump_stack+0x2b/0x2d
   [<c0116a77>] set_cpus_allowed+0x52/0xec
   [<c0101d86>] cpu_idle_wait+0x2e/0x100
   [<c0259c57>] acpi_processor_power_exit+0x45/0x58
   [<c0259752>] acpi_processor_remove+0x46/0xea
   [<c025c6fb>] acpi_start_single_object+0x47/0x54
   [<c025cee5>] acpi_bus_register_driver+0xa4/0xd3
   [<c04ab2d7>] acpi_processor_init+0x57/0x77
   [<c01004d7>] init+0x146/0x2fd
   [<c0103a87>] kernel_thread_helper+0x7/0x10

a quick look at cpu_idle_wait() shows how broken that code is
on i386: it changes the init task's affinity map but never
restores it ...

and because all userspace tasks get forked by init, they all
inherited that single-CPU affinity mask. x86_64 cloned this
bug too.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Cc: Andreas Friedrich <andreas.friedrich@fujitsu-siemens.com>
Cc: Wolfgang Erig <Wolfgang.Erig@fujitsu-siemens.com>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

the new dwarf2 unwinder crashes while trying to dump the stack:

  Leftover inexact backtrace:

  Unable to handle kernel paging request at ffffffff82800000 RIP:
   [<ffffffff8026cf26>] dump_trace+0x35b/0x3d2
  PGD 203027 PUD 205027 PMD 0
  Oops: 0000 [2] PREEMPT SMP
  CPU 0
  Modules linked in:
  Pid: 30, comm: khelper Not tainted 2.6.19-rc6-rt1 #11
  RIP: 0010:[<ffffffff8026cf26>]  [<ffffffff8026cf26>] dump_trace+0x35b/0x3d2
  RSP: 0000:ffff81003fb9d848  EFLAGS: 00010006
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: 0000000000000000 RSI: ffffffff805b3520 RDI: 0000000000000000
  RBP: ffffffff827ffff9 R08: ffffffff80aad000 R09: 0000000000000005
  R10: ffffffff80aae000 R11: ffffffff8037961b R12: ffff81003fb9d858
  R13: 0000000000000000 R14: ffffffff80598460 R15: ffffffff80ab1fc0
  FS:  0000000000000000(0000) GS:ffffffff806c4200(0000) knlGS:0000000000000000
  CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
  CR2: ffffffff82800000 CR3: 0000000000201000 CR4: 00000000000006e0

this crash happened because it did not sanitize the dwarf2 data it
got, and got an unaligned stack pointer - which happily walked past
the process stack (and eventually reached the end of kernel memory
and pagefaulted there) due to this naive iteration condition:

        HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);

note that i386 is alot more conservative when it comes to trusting
stack pointers:

  static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
  {
         return  p > (void *)tinfo &&
                 p < (void *)tinfo + THREAD_SIZE - 3;
  }

but the x86_64 code did not take this bit of i386 code.

The fix is to align the stack pointer.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Benh points out that the msgs[0].flags entry never got initialized, and
since it's an automatic stack allocation, it could have any random
value, which is bad.

Rewrite the initializer to explicitly initialize all fields of the small
i2c_msg structure array we generate.  Just to keep it all obvious, let's
handle msgs[1].buf in the same initializer while we're at it, instead of
initializing that one separately later.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

When radeonfb was changed to use the new "generic" ddc, a bit of
code initializing the GPIO lines was lost, causing it to not work
if the firmware didn't configure them properly, which seems to
happen on some cards.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
  aoe: Add forgotten NULL at end of attribute list in aoeblk.c
  debugfs: check return value correctly
  W1: ioremap balanced with iounmap

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: auerswald possible memleak fix
  USB: ipaq: Add HTC Modem Support
  USB: Fixed outdated usb_get_device_descriptor() documentation
  usb-storage: Remove duplicated unusual_devs.h entries for Sony Ericsson P990i
  USB: hid-core: Add quirk for new Apple keyboard/trackpad
  USB Storage: unusual_devs.h entry for Sony Ericsson P990i
  USB: correct keymapping on Powerbook built-in USB ISO keyboards
  USB: OHCI: fix root-hub resume bug
  USB: Fix UCR-61S2B unusual_dev entry
  USB: ftdi driver pid for dmx-interfaces
  USB: ftdi_sio: adds vendor/product id for a RFID construction kit
  OHCI: disallow autostop when wakeup is not available

This caused the system to stall when the aoe module was loaded.  The
error was introduced in commit 4ca5224fSigned-off-by: NDennis Stosberg <dennis@stosberg.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The return value is stored in "*dentry", not in "dentry".
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

ioremap must be balanced with iounmap in error path.

Please consider for 2.6.19.
Signed-off-by: NAmol Lad <amol@verismonetworks.com>
Signed-off-by: NEvgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

fix possible memory leak in auerbuf_setup().

Regards,

	Mariusz Kozlowski
Signed-off-by: NMariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: NWolfgang Muees <wolfgang@iksw-muees.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Adds support for HTC Smart Phones in modem mode (as opposed to sync
mode).  Loads and works with pppd on my T-Mobile SDA.
Signed-off-by: NAlex Sanks <alex@sanks.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

usb_get_device_descriptor() used to convert several descriptor fields to host
CPU's byte order. Now that it doesn't convert them anymore, update the
documentation to reflect this.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

For some reason the unusual_devs.h entry for Sony Ericsson P990i had
three identical copies in a wrong place in the file in addition to the
correct entry.
Signed-off-by: NSergey Vlasov <vsu@altlinux.ru>
Signed-off-by: NPhil Dibowitz <phil@ipom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The new Core2 Duo MacBook Pro have a new keyboard+trackpad device.

The following patch adds the needed HID quirk for the Fn key.
Signed-off-by: NJulien BLACHE <jb@jblache.org>
Signed-off-by: NVojtech Pavlik <vojtech@suse.cz>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

USB Storage: this patch adds support for Sony Ericsson P990i
Signed-off-by: NJan Mate <mate@fiit.stuba.sk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

similar to the version in adbhid_input_register(): The '<>' key and the
'^°' key on a german keyboard is swapped.  Provide correct keys to
userland, external USB keyboards will not work correctly when the
'badmap'/'goodmap' workarounds from xkeyboard-config are used.

It is expected that distributions drop the badmap/goodmap part from
keycodes/macintosh in the xkeyboard-config package.

This is probably 2.6.18.x material, if major distros settle on 2.6.18.
Signed-off-by: NOlaf Hering <olh@suse.de>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

When a suspended OHCI controller sees a port's status change, it sets
both the Root-Hub-Status-Change and the Resume-Detect bits in the
Interrupt Status register.  Processing both these bits, the driver
tries to resume the root hub twice!

This patch (as807) fixes the bug by ignoring RD if RHSC is set.  It
also prints a slightly more informative log message when a
remote-wakeup event occurs.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Recently this entry's bcd scope was narrowed so as not to falsly apply
to bcd's other than 0x0110. But while it breaks those of a larger bcd,
it is still needed for those of a smaller bcd - so this changes the
lower bcd limit to 0x0000.
Signed-off-by: NPhil Dibowitz <phil@ipom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Please add a usb pid to the ftdi_sio driver. The pid is used by dmx4all
dmx-interfaces (for stage lighting).

The interfaces are using the usb-id 0403:c850. I added the id to the driver
and it works perfectly. I added a patch for linux 2.6.18.1, too.

From: Frank Sievertsen <frank@sievertsen.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Adds the vendor and prodcut id for a RFID construction kit from the
Elektor Electronics magazine, september 2006.

From: Kjell Myksvoll <kmyksvo@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch (as822) prevents the OHCI autostop mechanism from kicking in
if the root hub is not able or not allowed to issue wakeup requests.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

on x86_64, the CONFIG_CC_STACKPROTECTOR build fails if used in a
distcc setup that has "CC" defined to "distcc gcc":

 gcc: gcc: linker input file unused because linking not done
 gcc: gcc: linker input file unused because linking not done
 gcc: gcc: linker input file unused because linking not done

this is because the gcc-x86_64-has-stack-protector.sh script
has a 2-parameters assumption. Fix this by passing $(CC) as
a single parameter.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Please-Use-Me-More: make randconfig
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Broken by earlier patch by me.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] Remove OP_MAX_COUNTER
  [ARM] Remove PM_LEGACY=y from selected ARM defconfigs
  [ARM] 3857/2: pnx4008: add devices' registration

* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] psi240i.c: fix an array overrun
  [SCSI] gdth: Fix && typos
  [SCSI] iscsi class: update version
  [SCSI] iscsi_tcp: fix xmittask oops
  [SCSI] iscsi: add newlines to debug messages
  [SCSI] iscsi: always release crypto
  [SCSI] sg: fix incorrect last scatg length
  [SCSI] 3ware 9000 add support for 9650SE
  [SCSI] aic94xx SCSI timeout fix: SMP retry fix.
  [SCSI] aic94xx SCSI timeout fix

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [TG3]: Disable TSO on 5906 if CLKREQ is enabled.
  [TCP]: Fix up sysctl_tcp_mem initialization.
  [NETFILTER]: ip6_tables: use correct nexthdr value in ipv6_find_hdr()
  [NETFILTER]: ip6_tables: fixed conflicted optname for getsockopt
  [NETFILTER]: Use pskb_trim in {ip,ip6,nfnetlink}_queue
  [NETFILTER]: nfnetlink_log: fix byteorder of NFULA_SEQ_GLOBAL
  [TG3]: Increase 5906 firmware poll time.

* 'release' of master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] a fix towards allmodconfig build
  [IA64] use generic_handle_irq()
  [IA64] typename -> name conversion
  [IA64] irqs: use `name' not `typename'
  [IA64] bte_unaligned_copy() transfers one extra cache line.

ATAPI devices transfer fixed number of bytes for CDBs (12 or 16).  Some
ATAPI devices choke when shorter CDB is used and the left bytes contain
garbage.  Block SG_IO cleared left bytes but SCSI SG_IO didn't.  This patch
makes SCSI SG_IO clear it and simplify CDB clearing in block SG_IO.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Cc: Mathieu Fluhr <mfluhr@nero.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Douglas Gilbert <dougg@torque.net>
Acked-by: NJens Axboe <jens.axboe@oracle.com>
Cc: <stable@kernel.org>
Acked-by: NJeff Garzik <jgarzik@pobox.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

When CIFS is the lower filesystem, the old lower dentry needs to be explicitly
dropped from inside eCryptfs to force a revalidate.  In addition, when CIFS is
the lower filesystem, the inode attributes need to be copied back up from the
lower inode to the eCryptfs inode on an eCryptfs revalidate.
Signed-off-by: NMichael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Recently, __get_vm_area_node() was changed like following

 	if (unlikely(!area))
 		return NULL;

-	if (unlikely(!size)) {
-		kfree (area);
+	if (unlikely(!size))
 		return NULL;
-	}

It is leaking `area', also original code seems strange already.
Probably, we wanted to do this patch.
Signed-off-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This adds fat_getattr() for setting stat->blksize. (FAT uses the size
of cluster for proper I/O)
Signed-off-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NAlexey Dobriyan <adobriyan@openvz.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Amend the text of AFS configuration options.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

platform_device_register_simple() returns error code as pointer when it
fails.  The return value should be checked by IS_ERR().

Cc: Abhay Salunke <abhay_salunke@dell.com>
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Change Documentation/filesystems/udf.txt from saying that read/write mounts
on cd media are not supported to instead state the current level of
support.  Specifically that it works fine on dvd+rw media and can be made
to work on cd-rw media via the pktcdvd device.

Cc: Peter Osterlund <petero2@telia.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

http://kernelfun.blogspot.com/2006/11/mokb-14-11-2006-linux-26x-selinux.html

mount that image...
fs: filesystem was not cleanly unmounted, running fsck.hfs is recommended.  mounting read-only.
hfs: get root inode failed.
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000018
 printing eip
...
EIP is at superblock_doinit+0x21/0x767
...
 [] selinux_sb_kern_mount+0xc/0x4b
 [] vfs_kern_mount+0x99/0xf6
 [] do_kern_mount+0x2d/0x3e
 [] do_mount+0x5fa/0x66d
 [] sys_mount+0x77/0xae
 [] syscall_call+0x7/0xb
DWARF2 unwinder stuck at syscall_call+0x7/0xb

hfs_fill_super() returns success even if
  root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
or
  sb->s_root = d_alloc_root(root_inode);

fails.  This superblock finds its way to superblock_doinit() which does:

        struct dentry *root = sb->s_root;
        struct inode *inode = root->d_inode;

and boom.  Need to make sure the error cases return an error, I think.

[akpm@osdl.org: return -ENOMEM on oom]
Signed-off-by: NEric Sandeen <sandeen@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix compilation failure.
Signed-off-by: NArnaud Giersch <arnaud.giersch@free.fr>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The PCI Express and Hypertransport chip-specific source files should only
be built when the kernel has the capability of actually compiling them.

This fixes the driver build on, for example, ia64.
Signed-off-by: NBryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Finally add the third PowerBook Wallstreet 233MHz model to the list of
known display resolutions.

Without this change, a 640x480 video mode is used.  A workaround so far was
to boot with 'video=atyfb:vmode:14'
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Solomon Peachy <pizza@shaftnet.org>
Cc: James Simmons <jsimmons@infradead.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

On rename, for both the old and new lower dentry objects, eCryptfs is
missing a dput on the lower parent directory dentry.  This patch will
prevent the BUG() at fs/dcache.c:613 from being hit after renaming a file
inside eCryptfs and then doing a umount on the lower filesystem.
Signed-off-by: NMichael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>