* git://git.infradead.org/~dhowells/irq-2.6:
  IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
  IRQ: Typedef the IRQ handler function type
  IRQ: Typedef the IRQ flow handler function type

The UDF filesystem can't be mounted in read-write mode any more,
because of forgotten braces.
Signed-off-by: NPeter Osterlund <petero2@telia.com>
[ Duh! ]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Include linux/kallsyms.h unconditionally for print_symbol().
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6:
  [PATCH] i386: fix rwsem build bug on CONFIG_M386=y
  [PATCH] x86-64: Annotate interrupt frame backlink in interrupt handlers
  [PATCH] x86-64: Fix FPU corruption
  [PATCH] x86: Terminate the kernel stacks for the unwinder
  [PATCH] i386: Fix PCI BIOS config space access
  [PATCH] x86-64: Calgary IOMMU: print PCI bus numbers in hex
  [PATCH] x86-64: Calgary IOMMU: Update Jon's contact info
  [PATCH] x86-64: Calgary IOMMU: Fix off by one when calculating register space location
  [PATCH] x86-64: Calgary IOMMU: deobfuscate calgary_init
  [PATCH] i386: Update defconfig
  [PATCH] x86-64: Update defconfig

[ Manually skipped commits that incorrectly ignored AC in kernel space.
  The alignment fault is defined to only happen for CPL3 anyway  - Linus ]

commit 0181944f adds a
'extended_error_logging' global variable to qla2xxx which is defined by
qla4xxx too.

Trying to build both drivers results in the following error:

  LD      drivers/scsi/built-in.o
  drivers/scsi/qla4xxx/built-in.o: In function `qla4xxx_slave_configure':
  drivers/scsi/qla4xxx/ql4_os.c:1433: multiple definition of `extended_error_logging'
  drivers/scsi/qla2xxx/built-in.o:drivers/scsi/qla2xxx/qla_os.c:2166:
  first defined here
  make[2]: *** [drivers/scsi/built-in.o] Error 1
  make[1]: *** [drivers/scsi] Error 2
  make: *** [drivers] Error 2

The following patch simply adds a qla2_ (qla4_ respectively) prefix to
the variable name.
Signed-off-by: NFrederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

CONFIG_M386 turns on spinlock-based generic rwsems - which surprises the
semaphore.S rwsem stubs. Tested both with and without CONFIG_M386.
Reported-by: NKlaus Knopper <knopper@knopper.net>
Triaged-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndi Kleen <ak@suse.de>

Add correct CFI annotation to the backlink on top of the interrupt stack.
Signed-off-by: NAndi Kleen <ak@suse.de>

This reverts an earlier patch that was found to cause FPU
state corruption. I think the corruption happens because
unlazy_fpu() can cause FPU exceptions and when it happens
after the current switch some processing would affect
the state in the wrong process.

Thanks to  Douglas Crosher and Tom Hughes for testing.

Cc: jbeulich@novell.com
Signed-off-by: NAndi Kleen <ak@suse.de>

Always make sure RIP/EIP is 0 in the registers stored on the top
of the stack of a kernel thread. This makes sure the unwinder code
won't try a fallback but knows the stack has ended.

AK: this patch is a bit mysterious. in theory they should be terminated
anyways, but it seems to fix at least one crash. Anyways double termination
probably doesn't hurt.
Signed-off-by: NAndi Kleen <ak@suse.de>

Got broken by a earlier change.

Also add a printk when no pci config method could be found.

Cc: gregkh@suse.de
Signed-off-by: NAndi Kleen <ak@suse.de>

Make the references to the bus number in hex instead of decimal, as
that is the way that lspci prints out the bus numbers.
Signed-off-by: NJon Mason <jdmason@kudzu.us>
Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>

Also add copyright for work done after leaving IBM.
Signed-off-by: NJon Mason <jdmason@kudzu.us>
Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>

The purpose of the code being modified is to determine the location
of the calgary chip address space.  This is done by a magical formula
of FE0MB-8MB*OneBasedChassisNumber+1MB*(RioNodeId-ChassisBase) to
find the offset where BIOS puts it.  In this formula,
OneBasedChassisNumber corresponds to the NUMA node, and rionodeid is
always 2 or 3 depending on which chip in the system it is.  The
problem was that we had an off by one error that caused us to account
some busses to the wrong chip and thus give them the wrong address
space.

Fixes RH bugzilla #203971.
Signed-off-by: NJon Mason <jdmason@kudzu.us>
Signed-off-bu: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>

calgary_init's for loop does not correspond to the actual device being
checked, which makes its upperbound check for array overflow useless.
Changing this to a do-while loop is the correct way of doing this.
There should be no possibility of spinning forever in this loop, as
pci_get_device states that it will go through all iterations, then
return NULL (thus breaking the loop).
Signed-off-by: NJon Mason <jdmason@kudzu.us>
Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>

Signed-off-by: NAndi Kleen <ak@suse.de>

Signed-off-by: NAndi Kleen <ak@suse.de>

Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

Typedef the IRQ handler function type.
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
(cherry picked from 1356d1e5fd256997e3d3dce0777ab787d0515c7a commit)

Typedef the IRQ flow handler function type.
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
(cherry picked from 8e973fbdf5716b93a0a8c0365be33a31ca0fa351 commit)

Merge window closed..

There is a bug in the current version of the itmtouch USB touchscreen
driver.  The if statment that checks if pressure is being applied to the
touch screen is now missing a ! (not), so events are no longer being
reported correctly.

The original source code for this line was as follows:

	#define UCP(x) ((unsigned char*)(x))
	#define UCOM(x,y,z) ((UCP((x)->transfer_buffer)[y]) & (z))

	...
	if (!UCOM(urb, 7, 0x20)) {

And was cleaned to:

	unsigned char *data = urb->transfer_buffer;
	....
	 if (data[7] & 0x20) {

(note the lack of '!')

This has been tested on an LG L1510BF and an LG1510SF touch screen.
Signed-off-by: NMark Assad <massad@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* master.kernel.org:/pub/scm/linux/kernel/git/willy/parisc-2.6:
  [PA-RISC] Fix time.c for new do_timer() calling convention
  [PA-RISC] Fix must_check warnings in drivers.c
  [PA-RISC] Fix parisc_newuname()
  [PA-RISC] Remove warning from pci.c
  [PA-RISC] Fix filldir warnings
  [PA-RISC] Fix sys32_sysctl
  [PA-RISC] Fix sba_iommu compilation

* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] cell: fix bugs found by sparse
  [POWERPC] spiderpic: enable new style devtree support
  [POWERPC] Update cell_defconfig
  [POWERPC] spufs: add infrastructure for finding elf objects
  [POWERPC] spufs: support new OF device tree format
  [POWERPC] spufs: add support for read/write on cntl
  [POWERPC] spufs: remove support for ancient firmware
  [POWERPC] spufs: make mailbox functions handle multiple elements
  [POWERPC] spufs: use correct pg_prot for mapping SPU local store
  [POWERPC] spufs: Add infrastructure needed for gang scheduling
  [POWERPC] spufs: implement error event delivery to user space
  [POWERPC] spufs: fix context switch during page fault
  [POWERPC] spufs: scheduler support for NUMA.
  [POWERPC] spufs: cell spu problem state mapping updates

* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (54 commits)
  [SCSI] Initial Commit of qla4xxx
  [SCSI] raid class: handle component-add errors
  [SCSI] SCSI megaraid_sas: handle thrown errors
  [SCSI] SCSI aic94xx: handle sysfs errors
  [SCSI] SCSI st: fix error handling in module init, sysfs
  [SCSI] SCSI sd: fix module init/exit error handling
  [SCSI] SCSI osst: add error handling to module init, sysfs
  [SCSI] scsi: remove hosts.h
  [SCSI] scsi: Scsi_Cmnd convertion in aic7xxx_old.c
  [SCSI] megaraid_sas: sets ioctl timeout and updates version,changelog
  [SCSI] megaraid_sas: adds tasklet for cmd completion
  [SCSI] megaraid_sas: prints pending cmds before setting hw_crit_error
  [SCSI] megaraid_sas: function pointer for disable interrupt
  [SCSI] megaraid_sas: frame count optimization
  [SCSI] megaraid_sas: FW transition and q size changes
  [SCSI] qla2xxx: Update version number to 8.01.07-k2.
  [SCSI] qla2xxx: Stall mid-layer error handlers while rport is blocked.
  [SCSI] qla2xxx: Add MODULE_FIRMWARE tags.
  [SCSI] qla2xxx: Add support for host port state FC transport attribute.
  [SCSI] qla2xxx: Add support for fabric name FC transport attribute.
  ...

do_timer now wants to know how many ticks have elapsed.  Now that we
have to calculate that, we can eliminate some of the clever code that
avoided having to calculate that.  Also add some more documentation.
I'd like to thank Grant Grundler for helping me with this.
Signed-off-by: NMatthew Wilcox <willy@parisc-linux.org>

Panic if we can't register the parisc bus or the root parisc device.
There's no way we can boot without them, so let the user know ASAP.

If we can't register a parisc device, handle the failure gracefully.
Signed-off-by: NMatthew Wilcox <willy@parisc-linux.org>

The utsname virtualisation broke parisc_newuname compilation.
Rewrite the implementation to call sys_newuname() like sparc64 does.
Signed-off-by: NMatthew Wilcox <willy@parisc-linux.org>

max() doesn't like comparing an unsigned long and a resource_size_t,
so make the local variables resource_size_t too.
Signed-off-by: NMatthew Wilcox <willy@parisc-linux.org>

filldir_t now takes a u64, not an ino_t.
Signed-off-by: NMatthew Wilcox <matthew@wil.cx>

When CONFIG_SYSCTL_SYSCALL isn't defined, do_sysctl doesn't exist and
we fail to link.  Fix with an ifdef, the same way sparc64 did.
Also add some minor changes to be more like sparc64.
Signed-off-by: NMatthew Wilcox <matthew@wil.cx>

klist_iter_exit() only takes one parameter.
Also fix warning by adding additional brackets.
Signed-off-by: NMatthew Wilcox <matthew@wil.cx>

- Some long constants should be marked 'ul'.
- When using desc->handler_data to pass an __iomem
  register area, we need to add casts to and from
  __iomem.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This enables support for new firmware test releases.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This adds defaults for new configuration options added since
2.6.18 and it enables the option for 64kb pages by default.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This adds an 'object-id' file that the spe library can
use to store a pointer to its ELF object. This was
originally meant for use by oprofile, but is now
also used by the GNU debugger, if available.

In order for oprofile to find the location in an spu-elf
binary where an event counter triggered, we need a way
to identify the binary in the first place.

Unfortunately, that binary itself can be embedded in a
powerpc ELF binary. Since we can assume it is mapped into
the effective address space of the running process,
have that one write the pointer value into a new spufs
file.

When a context switch occurs, pass the user value to
the profiler so that can look at the mapped file (with
some care).
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The properties we used traditionally in the device tree are somewhat
nonstandard.  This adds support for a more conventional format using
'interrupts' and 'reg' properties.

The interrupts are specified in three cells (class 0, 1 and 2) and
registered at the interrupt-parent.

The reg property contains either three or four register areas in the
order 'local-store', 'problem', 'priv2', and 'priv1', so the priv1 one
can be left out in case of hypervisor driven systems that access these
through hcalls.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Writing to cntl can be used to stop execution on the
spu and to restart it, reading from cntl gives the
contents of the current status register.

The access is always in ascii, as for most other files.

This was always meant to be there, but we had a little
problem with writing to runctl so it was left out so
far.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Any firmware that still uses the 'spc' nodes already
stopped running for other reasons, so let's get rid of this.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Since libspe2 will provide a function that can read/write
multiple mailbox elements at once, the kernel should handle
that efficiently.

read/write on the three mailbox files can now access the
spe context multiple times to operate on any number of
mailbox data elements.

If the spu application keeps writing to its outbound
mailbox, the read call will pick up all the data in a
single system call.

Unfortunately, if the user passes an invalid pointer,
we may lose a mailbox element on read, since we can't
put it back. This probably impossible to solve, if the
user also accesses the mailbox through direct register
access.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This hopefully fixes a long-standing bug in the spu file system.
An spu context comes with local memory that can be either saved
in kernel pages or point directly to a physical SPE.

When mapping the physical SPE, that mapping needs to be cache-inhibited.
For simplicity, we used to map the kernel backing memory that way
too, but unfortunately that was not only inefficient, but also incorrect
because the same page could then be accessed simultaneously through
a cacheable and a cache-inhibited mapping, which is not allowed
by the powerpc specification and in our case caused data inconsistency
for which we did a really ugly workaround in user space.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>