Add a new system call setaltroot(2).

Currently, using the altroot feature is accessible only via the
set_personality() system call.  It is accessible to user space only if there
is more than one exec domain in the system.  This patch allows using the
altroot feature on systems where there is only one exec domain.

It is possible to work around the issue by adding a dummy exec domain, but it
was rejected for not being very elegant.

If this feature is implemented in userspace, it adds a 16% overhead on a test
case which greps for a single word in the kernel source tree.
Signed-off-by: Zou Nanhai <nanhai.zou@intel.com>
Signed-off-by: Gordon Jin <gordon.jin@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

None of the compatibility defines make sense for assembly
files, and gcc has trouble with vararg macros when using
"-traditional" (which is used for asm), to the point of
ICE'ing.

Paul cares. I think there's something in the water at IBM
that makes people sticklers ;)

The move of iomap out of eeh inadvertently broke iSeries ...

Fixed like this.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This fixes some issues with restoring the altivec and/or FPU registers
upon return from a signal or when setting a context.  It also add a
proper stack backlink to the signal frames created for 64 bits
applications.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

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

into pobox.com:/spare/repo/libata-2.6

Allows us to do compile-time sparse warnings of our own.

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

into titanic.il.steeleye.com:/home/jejb/BK/scsi-for-linus-2.6

From: Luben Tuikov <luben_tuikov@adaptec.com>

Fix sleeping while holding a lock on host removal and on
killing the DV thread.
Signed-off-by: Luben Tuikov <luben_tuikov@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

From: James.Smart@Emulex.Com

urther testing is showing that we are having some i/o threads
prematurely die with the following message: "rejecting I/O to device
being removed"
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

This patch changes our open specifically for clustering software. We must
allow root to access any volume or device with a LUN ID. We also modified
our revalidate function for this reason.
If a logical is reserved, we must register it with the OS with size=0. Then
the backup system can call BLKRRPART after breaking the reservation to
set the device to the correct size.
We also must register a controller with no logical volumes for the online
utilities to function. This is the way we've done it since the 2.2 kernel.
Which doesn't neccesarily make it right, but we have legacy apps to consider.

Signed off by: Mike Miller <mike.miller@hp.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

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

Patch from Ben Dooks

Update the include/asm-arm/arch-s3c2410/regs-gpio.h with
GSTATUS1 register information

Signed-off-by: Ben Dooks 

Patch from Ben Dooks

Fixes the following problems and ommisions:

 - added variable for base crystal rate
 - moved clock variables into clock.c
 - fixed bug in identifying s3c2440 cpus
 - added initial support for new uart registration
 - removed base blocks from include/asm/arch/hardware.h

Signed-off-by: Ben Dooks 

Patch from Ben Dooks

This patch stops mtd from generating problems of
casting pointers to ints, due to the memcpy_fromio
and related functions all taking `unsigned long`
for their IO addresses.

Replace `unsigned long` with `void __iomem *`

Compiled clean on arch-s3c2410

Signed-off-by: Ben Dooks 

this also found a real bug, qla2xxx isn't iounmapping at host removal at
all currently - and if the right cpp macro would have been set it'd be
too late.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

Andrew requested this fix go in before 2.6.9 was out, to keep people's
syslog quiet for a lot of different USB input devices.

Fixes bug bugzilla.kernel.org bug #3564
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

I apparently can't copy simple obvious fixes by hand.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This obvious missing unlock is screwing the preemption count.
Fix was applied to MTD CVS already.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The firmware loader has a security issue.  Firmware on some devices can
write to all memory through DMA.  Therefore the ability to feed firmware
to the kernel is equivalent to writing to /dev/kmem.  CAP_SYS_RAWIO is
needed to protect itself.

[ Editors note: the firmware file is 0644, and owned by root, so this
  "security issue" is really only an issue for people who use
  capabilities explicitly, rather than the regular Unix permissions.
  This patch makes it do the same checks we do for /dev/mem etc.  ]
Signed-Off-By: Oliver Neukum <oliver@neukum.name>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch is necessary to make NFS3 krb5 clients work on x86-64.

ACK'ed by Trond
Signed-off-by: Mark Goodman <mgoodman@csua.berkeley.edu>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch updates our SCSI support to no longer use deprecated APIs.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

This change is needed in order to allow cpus to be onlined after
boot.  This used to work but the declaration of
pseries_secondary_smp_init in this file was changed in Ben's big
cleanup patch a while back, so the cpu would start at a bad address.
Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fix some bugs in the kswapd logic which can cause kswapd lockups.

The balance_pgdat() logic is supposed to cause kswapd to loop across all zones
in the node until each zone either

	a) has enough pages free or

	b) is deemed to be in an "all pages unreclaimable" state.

In the latter case, we just give the zone a light scan on each balance_pgdat()
scan and wait for the zone to come back to life again.

But the zone->all_unreclaimable logic is broken - if the zone has no pages on
the LRU at all, we perform no scanning of that zone (of course).  So the
zone->pages_scanned is not incremented and the expression

		if (zone->pages_scanned > zone->present_pages * 2)
			zone->all_unreclaimable = 1;

never is satisfied.

The patch changes that logic to

		if (zone->pages_scanned >= (zone->nr_active +
						zone->nr_inactive) * 4)
			zone->all_unreclaimable = 1;

so if the zone has no LRU pages it will still enter the all_unreclaimable
state.


Another problem is that if the zone has no LRU pages we will tell
shrink_slab() that we scanned zero LRU pages.  This causes shrink_slab() to
scan zero slab objects, which is obviously wrong.  So change shrink_slab() to
perform a decent chunk of slab scanning in this situation.


And put a cond_resched() into the balance_pgdat() outer loop.  Probably
unnecessary, but that's what Jeff had in place when he confirmed that this
patch fixed the lockup :(
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

In assembly code, there are some problems with "nosave" section (linker was
doing something stupid, like duplicating the section).  We attempted to fix
it, but fix was worse then first problem.  This fixes is for good: We no
longer use any memory in the copy loop.  (Plus it fixes indentation and
uses meaningful labels.)
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

A hack to prevent the compiler from generatin tailcalls in these two
functions.

With CONFIG_REGPARM=y, the tailcalled code ends up stomping on the
syscall's argument frame which corrupts userspace's registers.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fix error found by 'scripts/reference_discarded.pl':
Error: ./drivers/char/agp/intel-agp.o .data refers to 00000914 R_386_32          .exit.text
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

As Milton noticed, Anton actually broke the logic if the memory isn't
aligned in the first place.  Sorry about this mess for such a little
piece of code.  This _really_ fixes is it all
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

comparing u32 with ~0UL is wrong
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

I found a couple of issues with reserve_mem:

- If we try and mem_reserve something of zero length, everything
  reserved after it would get ignored. This is because early_reserve_mem
  sees a zero length as a terminator.
- The code rounded the top down instead of up.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch adds proper ppc32 "iomap" interfaces.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Nowadays, it's possible to build CONFIG_PPC_PMAC without CONFIG_PPC_PSERIES,
in which case, eeh will not be included in the build (and the eeh checks are
turned into no-ops). However, we then "lose" the iomap functions. This patch
moves them to a separate file.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fix bug identified by Badari Pulavarty <pbadari@us.ibm.com>

Local variable `handle' will become stale if ext3_direct_io_get_blocks()
closes off the current transaction and starts a new one.  This causes a BUG in
journal_stop().

So reacquire the handle from *current after performing the I/O.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Let's try the 2.4.x release methodology