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>

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

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

Hoping you will accept this fix.  The bug can cause a crash upon hotplug
remove.  The bug involves unsafe traversal of a list while deleting list
members.  The fix uses list_for_each_safe() rather than
list_for_each().  Also threw in an initialization to get rid of a
compiler warning.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

A bridge that has been set up by firmware to cover multiple PCI
buses but doesn't actually have anything connected behind some of
them caused us to use the incorrect maxmimum bus number span when
scanning the bridge chip.

Problem reported by Tim Saunders, with Russell King suggesting
the fix.

Make sure we order the writes to a newly created page
with the page table update that potentially exposes the
page to another CPU.

This is a no-op on any architecture where getting the
page table spinlock will already do the ordering (notably
x86), but other architectures can care.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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>