From: Lars Ellenberg <Lars.Ellenberg@linbit.com>

Add a memory barrier to the assembly checksum code - the code was copied
straight from the i386 one, and the patch resyncs the code with the
original.  I'll check if the original code can be included directly (i.e.
"#include") after 2.6.9.

Without this patch, every 2.6 UML release corrupts the checksum of every
UDP fragmented packet with size >= MTU (verified by various people, we all
agree on this issue; nobody reported "Works fine here").  The corrupted
packets are not accepted, thus blocking any kind of communication with
large-sized UDP packets.

In fact, I've even dissected the UML -> host traffic before and after this
patch with Ethereal - and it always reported an incorrect checksum for
fragmented UDP packets before and always correct after applying the patch.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Currently, ubd=sync is different from replacing ubd#= with ubd#s=.  This is
against Principle of Least Surprise, so remove this difference.

Also the current ubd=sync behaviour is completely useless: it is to make sure
that when the kernel has synched its I/O to the virtual disk, the host does
not invalidate this with his caching; this causes ReiserFS corruption.

But since actually we call end_request() only after the io_thread has done its
work, we never lie to the block layer.  Using O_SYNC as we do when replacing
ubd#= with ubd#s= is enough.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: BlaisorBlade <blaisorblade_spam@yahoo.it>, Chris Wright <chrisw@osdl.org>

Avoid deadlocking onto the request lock in the UBD driver, i.e.  don't lock
the queue spinlock when called from the request function.

In detail:

Rename ubd_finish() to __ubd_finish() and remove ubd_io_lock from it.  Add
wrapper, ubd_finish(), which grabs lock before calling __ubd_finish().  Update
do_ubd_request to use the lock free __ubd_finish() to avoid deadlock.  Also,
apparently prepare_request is called with ubd_io_lock held, so remove locks
there.
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Some configuration options are known not to compile.  So then make them depend
on CONFIG_BROKEN.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Remove one more symlink when doing

make mrproper ARCH=um
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Drop the usage of check_gcc and host-progs, and use their new names.  A
must-have :-).

Oh, and it will create lots of serious problems - it will give me your root
account!  Yes, you don't see the code in the patch, but it happens!  :-)))
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Makes the UML build system work well even under parallel make (tested, so far,
even with -j50).  Please notice that it must be updated for every makefile
change.  Or better, every makefile change must use correct dependencies (and
they are easy to miss).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Uml-specific patch (which requires a mainline hook, mailed separately).

This patch avoid the linking kludge which leaves kbuild link vmlinux and then
link it with libc inside linux.  This kludge has the big problem of making
kallsyms break, since the kallsyms pass is done on a completely
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Extraversion in arch/um/Makefile is not needed in mainline, but just for
separate patches; also, they should set it in the main Makefile, not elsewhere
(Jeff Garzik has just complained).  Also remove the dependency from version.h
on arch/um/Makefile: it was added because arch/um/Makefile could change the
kernel version number.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This forces make to use bash rather than whatever /bin/sh is linked to. 
Without this, since there are some bash extensions used in the build and when
/bin/sh isn't bash, then the build fails without a clear error message.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

If arch/$(ARCH)/Makefile is included before adding -O2 (and the rest) to
CFLAGS, I must duplicate the addition of it to USER_CFLAGS for UML.  So let's
fix this.  Also, the below code is useless, since if CONFIG_DEBUG_INFO is y,
then CONFIG_FRAME_POINTER is always y.

ifeq ($(CONFIG_DEBUG_INFO),y)
CFLAGS := $(subst -fomit-frame-pointer,,$(CFLAGS))
endif
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Adds a lot more EXPORT_SYMBOLS calls.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fixes some random warnings.  To avoid "defined but not used" for
not_configged_ops, make it be defined only if at least one channel is not
defined.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Add some updates for API changes in 2.6.8 which were not included in the
original UML patch; these fixes were detected by some warnings, so I probably
missed some more ones.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

That var is used only when CONFIG_UML_REAL_TIME_CLOCK is on, so #ifdef its
definition.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

With the type-safe rb_entry (based on container_of, I sent it) I discovered
this type error, so I've fixed it.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Avoid redeclaring again (resulting in a compilation error) cpu_online and
cpu_*_map, which are now declared elsewhere.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The patch below by Roland McGrath fixes two bugs in the implementation of
the selinux_file_mprotect hook:

  It calls selinux_file_mmap, which has two problems.  First, the stacked
  security module will get both mmap and mprotect callbacks for an
  mprotect call, which is wrong.  Secondly, the vm_flags value contains 
  VM_* bits, and these do not match the MAP_* bits of the same name or
  function, so it passes bogus flags and causes every mprotect to be 
  treated as if MAP_SHARED were in use.

  The patch shares the common code while not having one function call the
  other, and fixes these two bugs.
Signed-off-by: James Morris <jmorris@redhat.com>
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This fixes a bug in SELinux to retain the ptracer SID (if any) across fork.
Otherwise, SELinux will always deny attempts by traced children to exec
domain-changing programs even if the policy would have allowed the tracer
to trace the new domains as well.
Signed-off-by: Stephen Smalley <sds@epoch.ncsc.mil>
Signed-off-by: James Morris <jmorris@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Derive process start times from the posix_clock_monotonic notion of uptime
instead of "jiffies", consistent with the earlier change to /proc/uptime
itself.
(http://linus.bkbits.net:8080/linux-2.5/cset@3ef4851dGg0fxX58R9Zv8SIq9fzNmQ?na%0Av=index.html|src/.|src/fs|src/fs/proc|related/fs/proc/proc_misc.c)

Process start times are reported to userspace in units of 1/USER_HZ since
boot, thus applications as procps need the value of "uptime" to convert
them into absolute time.

Currently "uptime" is derived from an ntp-corrected time base, but process
start time is derived from the free-running "jiffies" counter.  This
results in inaccurate, drifting process start times as seen by the user,
even if the exported number stays constant, because the users notion of
"jiffies" changes in time.

It's John Stultz's patch anyways, which I only messed up a bit, but since
people started trading signed-off lines on lkml:
Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Without this patch, Lubbock is pretty unusable in current 2.6.9-rc4.  The
same fix already present in the MTD CVS.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch makes sure that auth_domain_lookup returns NULL when it doesn't
find a matching entry, rather than the last entry in the hash chain.
Signed-off-by: Olaf Kirch <okir@suse.de>
Acked-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parkbd - zero-fill allocated serio structure to prevent Oops when
registering port.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This avoid userspace mm corruption during COWs with threads (i.e. 
malloc;fork;clone) on x86 PAE with >4G of ram
Signed-Off-By: Andrea Arcangeli <andrea@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

- cyberpro_free_fb_info() is called by both __devinit & __devexit code,
  so it cannot be __devinit.

- igs_regs[] is used by resume code (indirectly), so it cannot be
  discardable.

This leaves one reference in cyber2000fb that 'make buildcheck' complains
about, but I believe that it's OK, that being ".probe" here:

static struct pci_driver cyberpro_driver =
{
	.name = "CyberPro",
	.probe = cyberpro_pci_probe,
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch is for removing obsolete system calls from m32r kernel, such as 
old_mmap and old_select.

	* arch/m32r/kernel/entry.S:
	- Remove an obsolete system call, old_mmap, from the syscall table.

	* arch/m32r/kernel/sys_m32r.c:
	- Remove obsolete system calls, old_mmap() and old_select().
	- do_mmap2() is renamed to sys_mmap2().

* CAUTION (for m32r users):
  The new kernel (applied this patch) does not have a backward
  compatibility. The new kernel and old library pair does not work.

  So, those who want to use the new kernel must use a new version of 
  glibc (the GNU C library), which uses the "mmap2(_NR_mmap2)" syscall
  for __mmap() instead of the "old_mmap(__NR_mmap)".

  The new glibc package, libc6_2.3.2.ds1-16.0.3_m32r.deb, is provided
  on the following site, please apt-get/download it and upgrade.

    http://debian.linux-m32r.org/dists/03_cambrian/main/binary-m32r/Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch fixes the system call table for m32r.

The latest kernel cannot be linked for m32r, because the following
experimental syscalls doesn't exist in the prepatch kernel of bk-tree.

	* include/asm-m32r/unistd.h:
	- Remove syscalls from #285(perfctr_info) to #293(keyctl).

	* arch/m32r/kernel/entry.S: ditto.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The post-2.6.8 recent tweaks to the page writeback thresholding code seems to
be doing the wrong thing for small unmapped_ratios - nathans had a few
problems with it.  The problem it was trying to fix is minor and fairly
theoretical anyway, so back it out to the old code.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

It will oops on an error path if the thread being forked is a process with
a NULL mm.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

- Remove the setting of CLOCK_REALTIME and CLOCK_MONOTONIC resolution
  according to the interpolator resolution since this causes periodic timer
  signals to fail.  The clocks will still be high-resolution but the
  "resolution" reported reflects the timer intervals possible via
  timer_settime (also more conformant to what the Single Unix Specification
  says).

- Make the IA64 clock_gettime fastcall fall back on negative clock
  numbers instead of returning CLOCK_REALTIME.
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: Nathan Scott <nathans@sgi.com>

SGI Modid: xfs-linux:xfs-kern:19744a
Signed-off-by: Nathan Scott <nathans@sgi.com>

SGI Modid: xfs-linux:xfs-kern:19632a
Signed-off-by: Nathan Scott <nathans@sgi.com>

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Fixes a data corruption issue. Because of a typo in the driver, IO packets
were wrongly shared by the IOCTL path. This caused the whole IO command
to be replaced by an incoming IOCTL command.

ACPI still explodes on my old PII and stops it booting.

Anyway, it is oopsing in drivers/acpi/scan.c line 207 where element
(which is NULL) gets dereferenced.

The ACPI bios on this thing has always seemed to be pretty broken, but
this at least allows the 'power' button to continue to work (the only
reason why I want ACPI).

As spotted by one of our Fedora users, we sometimes
oops during shutdown (http://www.roberthancock.com/kerneloops.png)
because disable_IO_APIC() wants to call find_isa_irq_pin(),
which we threw away during init.
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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