From: Andy Whitcroft <apw@shadowen.org>

This patch eliminates the false hole which can form between ZONE_NORMAL and
ZONE_HIGHMEM.  This is most easily seen when 4g/4g split is enabled, but
it's always broken, and we just happen not to hit it most of the time.
Basically, the patch changes the allocation of the numa remaps regions (the
source of the holes) such that they officially fall within VMALLOC space,
where they belong.

Tested in -mjb for a couple of months, and again against 2.6.7-mm1.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Martin J. Bligh <mbligh@aracnet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Hit a kernel oops on 2.6.7 kernel when doing direct I/O to hugetlb page.

The destructor of compound page was moved into page->mapping since 2.6.6.
It got interfered with set_page_dirty() for hugetlb page: an O_DIRECT read
into first tail page of the compound page will fool set_page_dirty() to
deference page->mapping->a_ops and then kernel oops.  Patch to fix the
oops.  We do just like what bio_set_pages_dirty() does.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch makes AX.25 drivers use common crc16 code.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch makes various ISDN drivers use common crc16 code.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch makes IRDA subsystem use common crc16 code.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch makes async PPP driver use common crc16 code.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Currently we have 8 copies of CRC16 calculation table in different device
drivers, this patch creates common crc16.c module to replace them.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Right now the kernel detects the sysadmin trying to set the iocharset of
vfat to UTF8 and prevents this with an error.  While I can see that this is
not recommended, enforcing this is policy that probably doesn't belong in
the kernel.  The patch below makes this situation a warning and a
recommendation instead of a strong blockage.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=126641

is an example of a sysadmin disliking this policy enforcement.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Here's a patch to line up the "CPU: After * identify, caps:" messages
produced by printk's in arch/i386/kernel/cpu/common.c
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

SELinux should just drop out the socket and netfilter hooks when that is
disabled.

The problem was introduced because of the fine-grained netlink patches,
which made the selinux_netlink_send/recv hook functions depend on
CONFIG_SECURITY_NETWORK but the netlink_send/recv hooks themselves are not
dependent on it.

Need to move selinux_netlink_send/recv back out of the conditional block,
and provide a static inline stub for selinux_nlmsg_perm if
CONFIG_SECURITY_NETWORK is not defined.
Signed-off-by: Stephen Smalley <sds@epoch.ncsc.mil>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Using current gcc CVS I hit a piece of code in which the compiler was emitting
a memmove() call.  The kernel link failed.

Uninline it.

Also, move the memcpy and memset exports into memcpy.c.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Allow the lease to be set from /proc/fs/nfs/nfsv4leasetime.

To comply with rfc3530, this appears as a server reboot from the point of view
of the client, which must reclaim state with the grace period.

From: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Currently nfs4_arg->to_free keeps a list of void ptrs on which kfree is called
when freeing the nfs4_arg.  This allows us to do cleanup on e.g.  xdr decode
failures.  To allow more complicated objects to be freed (in particular,
acls), we add a "void (*release)(void *)" to allow us to request something
other than kfree be called when freeing.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Preparation for delegations: parse callback information provided in
setclientid request.

From: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>        
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Insist that the first time a client presents a new lockowner, the seqid should
be 0.  (RFC 3530 section 8.1.5)

Also, return an error if the client presents a previously-used lockowner as if
it were new.

From: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>        
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

nfsd4_proc_compound is using over a thousand bytes of stack.

This is partly because it declares two local svc_fh's, partly because of a big
switch statement which calls a bunch of functions which may be inlined.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>        
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>        
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Simplify nfsd4_release_lockowner a bit, factor out code that we need for
another patch.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>        
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Use opaque xdr encoding routines from xdr.c instead of rolling our own.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Greg Banks <gnb@sgi.com>

NFS/TCP has been used widely for a long time now, and is now enabled by many
distros and typically recommended for lossy or congested networks.  This patch
removes the EXPERIMENTAL tag, updates the help text, and changes arch
defconfigs to set it by default (note that several already did so).
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

It adds per node huge page stats in sysfs.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

I eliminated the request_irq brain damage, chopped off procfs support
(didn't care for it too much in the first place and it was adopted from
rtc.c), made the check for FMODE_WRITE in hpet_open and responded to a few
other suggestions.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch ports APM BIOS driver to new DMI probing API.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

BROKEN_ACPI_Sx flag doesn't seem to be used anywhere in the kernel, so ASUS
K7V-RM can be removed.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch ports powernow-k7 driver to new DMI probing API.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch ports sonypi driver to new DMI probing API and removes
is_unsafe_smbus global variable.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch ports sonypi driver to new DMI probing API and removes
is_sony_vaio_laptop global variable.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch ports PnP BIOS driver to new DMI probing API.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch moves PCI IRQ routing workaround for Acer TravelMate 360 laptop to
arch/i386/pci/irq.c and makes acer_tm360_irqrouting variable static.  It also
fixes VisWs build error caused by this workaround code.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

store_stackinfo() does an unlocked module list walk during normal runtime
which opens up a race with the module load/unload code.  This can be
triggered by simply unloading and loading a module in a loop with
CONFIG_DEBUG_PAGEALLOC resulting in store_stackinfo() tripping over bad
list pointers.

kernel_text_address doesn't take any locks, because during an OOPS we don't
want to deadlock.  Rename that to __kernel_text_address, and make
kernel_text_address take the lock.
Signed-off-by: Zwane Mwaikambo <zwane@fsmlabs.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (modified)
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

I find __free_pages_bulk very hard to understand ...  (I was trying to mod
it for the non MAX_ORDER aligned zones, and cleaned it up first).  This
should make it much more comprehensible to mortal man ...  I benchmarked
the changes on the big 16x and it's no slower (actually it's about 0.5%
faster, but that's within experimental error).

I moved the creation of mask into __free_pages_bulk from the caller - it
seems to really belong inside there.  Then instead of doing wierd limbo
dances with mask, I made it use order instead where it's more intuitive.
Personally I find this makes the whole thing a damned sight easier to
understand.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

I just find a bug that ``make distclean'' cannot remove the editor backup
files and the like when using build directory.  That is because the find
command is improperly searching the build directory instead of the
$(srctree) it should.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Verify that linking kallsyms into vmlinux generates a stable System.map,
instead of assuming that it is stable.

Add CONFIG_KALLSYMS_EXTRA_PASS as a temporary workaround for unstable maps,
so users can proceed while waiting for kallsyms to be fixed.
Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Exclude symbols added by kallsyms itself, so .tmp_kallsyms[12].S have
the same list of symbols.
Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This is a small cleanup requested by Urban, use the rcls/err in smb_request
as opposed to smb_sb_info.
Signed-off-by: Zwane Mwaikambo <zwane@linuxpower.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This BUG_ON() triggers for `count = -EFOO' due to PAGE_SIZE being unsigned.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

we'd like to announce the availability of the following kernel patch:

     http://redhat.com/~mingo/nx-patches/nx-2.6.7-rc2-bk2-AE

which makes use of the 'NX' x86 feature pioneered in AMD64 CPUs and for
which support has also been announced by Intel. (other x86 CPU vendors,
Transmeta and VIA announced support as well. Windows support for NX has
also been announced by Microsoft, for their next service pack.) The NX
feature is also being marketed as 'Enhanced Virus Protection'. This
patch makes sure Linux has full support for this hardware feature on x86
too.

What does this patch do? The pagetable format of current x86 CPUs does
not have an 'execute' bit. This means that even if an application maps a
memory area without PROT_EXEC, the CPU will still allow code to be
executed in this memory. This property is often abused by exploits when
they manage to inject hostile code into this memory, for example via a
buffer overflow.

The NX feature changes this and adds a 'dont execute' bit to the PAE
pagetable format. But since the flag defaults to zero (for compatibility
reasons), all pages are executable by default and the kernel has to be
taught to make use of this bit.

If the NX feature is supported by the CPU then the patched kernel turns
on NX and it will enforce userspace executability constraints such as a
no-exec stack and no-exec mmap and data areas. This means less chance
for stack overflows and buffer-overflows to cause exploits.

furthermore, the patch also implements 'NX protection' for kernelspace
code: only the kernel code and modules are executable - so even
kernel-space overflows are harder (in some cases, impossible) to
exploit. Here is how kernel code that tries to execute off the stack is 
stopped:

 kernel tried to access NX-protected page - exploit attempt? (uid: 500)
 Unable to handle kernel paging request at virtual address f78d0f40
  printing eip:
 ...

The patch is based on a prototype NX patch written for 2.4 by Intel -
special thanks go to Suresh Siddha and Jun Nakajima @ Intel. The
existing NX support in the 64-bit x86_64 kernels has been written by
Andi Kleen and this patch is modeled after his code.

Arjan van de Ven has also provided lots of feedback and he has
integrated the patch into the Fedora Core 2 kernel. Test rpms are
available for download at:

    http://redhat.com/~arjanv/2.6/RPMS.kernel/

the kernel-2.6.6-1.411 rpms have the NX patch applied.

here's a quickstart to recompile the vanilla kernel from source with the
NX patch:

    http://redhat.com/~mingo/nx-patches/QuickStart-NX.txt

update:

 - make the heap non-executable on PT_GNU_STACK binaries.

 - make all data mmap()s (and the heap) executable on !PT_GNU_STACK
   (legacy) binaries. This has no effect on non-NX CPUs, but should be
   much more compatible on NX CPUs. The only effect it has it has on
   non-NX CPUs is the extra 'x' bit displayed in /proc/PID/maps.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The previous discussion was started here:
http://www.uwsg.iu.edu/hypermail/linux/kernel/0211.0/0477.html but in 2.4
times this was kind of problematic.

Now, with the lazy bitmap allocation and per-CPU TSS, this will really not
drain any resources I think.  8K TSS increase and 8K per process *that does
ioperm()* - I think it is not very bad.

The reasons why I need that, are described in the URL above.  Basically this
will allow to use full-screen VESA under dosemu (without LFB though), and this
may be also helpfull for the XFree project and some other projects:

http://www.uwsg.iu.edu/hypermail/linux/kernel/9807.1/1079.htmlSigned-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

__alloc_bootmem_node currently panics if it cant satisfy an allocation for
a particular node.  Thats rather antisocial, we should at the very least
return NULL and allow the caller to proceed (eg try another node).

A quick look at alloc_bootmem_node usage suggests we should fall back to
allocating from other nodes if it fails (as arch/alpha/kernel/pci_iommu.c
and arch/x86_64/kernel/setup64.c do).

The following patch does that.  We fall back to the regular __alloc_bootmem
when __alloc_bootmem_node fails, which means all other nodes are checked
for available memory.
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 fixes a bit of iSeries code that hadn't been changed to reflect that
cpumask_t is now a struct and not an integer type.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>