Avoid deadlock when kernel fault happens inside mmap sem.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Update x86-64 defconfig
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Ported from i386

Allow to quieten apic boot output on the command line using
apic={verbose,debug,quiet}

Make it quiet by default

Add extra #define for making apic print functions __init or not
__init (for easier debugging)
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Make APIC errors KERN_DEBUG
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Add an atomic64_t type to x86-64.

Not used right now, but may be useful in the future, e.g.  for rss together
with C.Lameter's page fault scalability patches.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

For historical reasons, ppc64 has ended up with two #defines for the size
of a large (16M) page: LARGE_PAGE_SHIFT and HPAGE_SHIFT.  This patch
removes LARGE_PAGE_SHIFT in favour of the more widely used HPAGE_SHIFT.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

When I cleaned up our cmdline parsing, I missed a RELOC of CONFIG_CMDLINE
itself.  Without it we copy something random into cmd_line, but only when
CONFIG_CMDLINE is enabled.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The mace, bmac and dmasound drivers use virt_to_bus and so will not work on
ppc64.  Reflect this in the relevant Kconfig files.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

When a pseries+pmac kernel is built, the rtas stop-self token wasnt being
initialised.  Since doing this will safely fail on pmac, remove the
!CONFIG_PPC_PMAC restriction
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Nathan Lynch <nathanl@austin.ibm.com>

Fedora has a patch which introduces a new system state during boot.  Change
system_state == SYSTEM_BOOTING to system_state < SYSTEM_RUNNING to match
it.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

yenta_socket wants probe_irq_mask, so export it.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Remove the A() and AA() macros.  Now we have compat_ptr we should be using
that.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch fixes some warnings that popped up with the removal of
-Wno-uninitialized around the code doing tlbie's.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Remove some old definitions that arent relevant to us.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fix one compile warning and one build warning on iseries.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Replace the mmu_context_queue structure with the idr allocator.  The
mmu_context_queue allocation was quite large (~200kB) so on most machines
we will have a reduction in usage.

We might put a single entry cache on the front of this so we are more
likely to reuse ppc64 MMU hashtable entries that are in the caches.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Implement powersave_nap sysctl, like ppc32.  This allows us to disable the
nap function which is useful when profiling with oprofile (to get an
accurate count of idle time).
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Replace do_exit() in 64bit signal code with force_sig/force_sigsegv where
appropriate.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/syslib/open_pic2.c: In function `init_openpic2_sysfs':
arch/ppc/syslib/open_pic2.c:694: error: `ENODEV' undeclared (first use in this function)
arch/ppc/syslib/open_pic2.c:694: error: (Each undeclared identifier is reported only once
arch/ppc/syslib/open_pic2.c:694: error: for each function it appears in.)

possible fix below.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

When <linux/timex.h> started including <asm/io.h> this exposed one of the
fragilities of the code in arch/ppc/boot/, namely that it is tied to the
kernel headers for some information, yet not really the kernel.  The
following starts us in the direction of being less tied to the kernel by
providing our own serial_state definition (all we care about is the ability
to grab information from SERIAL_PORT_DFNS).
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Exec fails to clean up posix-timers.  This manifests itself in two ways, one
worse than the other.  In the single-threaded case, it just fails to clear out
the timers on exec.  POSIX says that exec clears out the timers from
timer_create (though not the setitimer ones), so it's wrong that a lingering
timer could fire after exec and kill the process with a signal it's not
expecting.  In the multi-threaded case, it not only leaves lingering timers,
but it leaks them entirely when it replaces signal_struct, so they will never
be freed by the process exiting after that exec.  The new per-user
RLIMIT_SIGPENDING actually limits the damage here, because a UID will fill up
its quota with leaked timers and then never be able to use timer_create again
(that's what my test program does).  But if you have many many untrusted UIDs,
this leak could be considered a DoS risk.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This uses Davide's do_general_protection() fault based io-bitmap lazy update
code and combines it with the ioport-owner cache.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

There's one additional step we can do ontop of the ports-max code to get rid
of copying in X.org's case: cache the last task that set up the IO bitmap. 
This means we can set the offset to invalid and keep the IO bitmap of that
task, and switch back to a valid offset (without any copying) when switching
back to that task.  (or do a copy if there is another ioperm task we switch
to.)

I've attached ioport-cache-2.6.8.1.patch that implements this. When
there's a single active ioperm() using task in the system then the
context-switch overhead is very low and constant:

 # ./ioperm-latency
 default no ioperm:             scheduling latency: 2478 cycles
 turning on port 80 ioperm:     scheduling latency: 2499 cycles
 turning on port 65535 ioperm:  scheduling latency: 2481 cycles

This single-ioperm-user situation matches 99% of the actual ioperm()
usage scenarios and gets rid of any copying whatsoever - without relying
on any fault mechanism. I can see no advantage of the GPF approach over
this patch.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Due to the tty ldisc code not stopping write operations against a driver
even after a tty has been closed I added a mechanism to hvc_console in my
previous patch to prevent this by nulling out the tty->driver_data in
hvc_close() but I forgot to check tty->driver_data in hvc_write().  Anton
Blanchard got several oops'es from hvc_write() accessing NULL as if it were
a pointer to an hvc_struct usually stored in tty->driver_data.

So this patch checks tty->driver_data in hvc_write() before it is used. 
Hopefully once Alan Cox's patch is checked in ldisc writes won't continue
to happen after tty closes.

Anton Blanchard has tested this patch and is unable to reproduce the oops
with it applied.

Changelog:

drivers/char/hvc_console.c

- Added comment to hvc_close() to explain the reason for NULLing
  tty->driver_data.

- Added check to hvc_write() to verify that tty->driver_data is valid
  (NOT NULL) which would be the case if the write operation was invoked
  after a tty close was initiated on the tty.
Signed-off-by: Ryan S. Arnold <rsa@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The I2O subsystem currently map all memory from the I2O controller for the
controller's in queue, even if it is not necessary.  This is a problem,
because on some systems the size returned from pci_resource_len() could be
128MB and only 1-4MB is needed.

Changes:

- only ioremap as much memory as the controller is actually using.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

into ppc970.osdl.org:/home/torvalds/v2.6/linux

Signed-off-by: Leigh Brown <leigh@solinno.co.uk>
Signed-off-by: Tom Rini <trini@kernel.crashing.org>

The Local Protect Bit needs to be set when entering full
duplex mode.
Signed-off-by: Rune Torgersen <runet@innovsys.com>
Signed-off-by: Tom Rini <trini@kernel.crashing.org>

into ppc970.osdl.org:/home/torvalds/v2.6/linux

into agluck-lia64.sc.intel.com:/data/home/aegl/BK/linux-ia64-release-2.6.9

 
  
The SGI Altix PROM supports a SAL call for performance monitoring and for
exporting NUMA topology. We need this in community kernels for diagnostic
and performance tools to use, especially on very large machines.

This patch registers a dynamic misc device "sn_hwperf" that supports an
ioctl interface for reading/writing memory mapped registers on Altix
nodes and routers via the new SAL call. It also creates a read-only
procfs file "/proc/sgi_sn/sn_topology" to export NUMA topology and Altix
hardware inventory.

> What tools are using this?
 
Performance Co-Pilot http://oss.sgi.com/projects/pcp  in particular,
pmshub, shubstats and linkstat. Numerous other users include anything
that needs knowledge of numa topology/interconnect in order to perform
well, e.g. mpt. BTW I have not exported any API functions .. at this
point I don't think we need any modules to call the API.
Signed-off-by: Mark Goodwin <markgw@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

into agluck-lia64.sc.intel.com:/data/home/aegl/BK/linux-ia64-release-2.6.9

Mark Goodwin suggested that we document our platform a bit.  This patch adds
help text for the sn2 specific kernel option.
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

r.k[56] used to contain physical addresses but now contain virtual
addresses.  There are code remnants which still believe that they are
physical and "convert" ar.k[56] to virtual.  This breaks when current
is not in region 7 (e.g. the idle task on cpu 0).
Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

into nuts.davemloft.net:/disk1/BK/net-2.6

Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes slab corruption in cbq_destroy. cbq_destroy_filters and
qdisc_put_rtab(q->link.R_tab) are already called in cbq_destroy_class.
The latter lead to a slab corruption due to repeated freeing of
q->link.R_tab because q->link is part of q->classes. Problem introduced
in 1.21.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds DSCP decapsulation for IPsec.  This is enabled by
a per-state flag which is off by default.  Leaving it off by default
maintains compatibility and is also good for performance reasons.

I decided to not implement a toggle on the output path since not
encapsulating the DSCP can and should be done by netfilter.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch kills the duplicate implementation of ip6_get_dsfield in
inet_ecn.h.  It now uses ipv6_get_dsfield from dsfield.h instead.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

into nuts.davemloft.net:/disk1/BK/net-2.6