into home.osdl.org:/home/torvalds/v2.5/linux

We know we have the right version because we were compiled in the
same kernel tree..

into home.osdl.org:/home/torvalds/v2.5/linux

into flint.arm.linux.org.uk:/usr/src/linux-bk-2.5/linux-2.5-rmk

This change seems to have been missed for some time.  Remove
__dump_stack(), and convert show_trace_task() to show_stack().

ARM had CONFIG_DEBUG_INFO for ages.  Unfortunately, the new
CONFIG_DEBUG_INFO was rather blindly applied across all architectures.
This removes the duplication from the ARM architecture.

into home.osdl.org:/home/torvalds/v2.5/linux

recent cleanups (removal of link release timer and
the STALE_CONFIG crud).

into groveronline.com:/root/bk/linux-acpi

This updates the blkmtd driver with the latest which has been in the MTD
CVS for quite a while.  It is a rewrite from the 2.4 version to work
with the new block layer changes.

When the *config targets were moved to scripts/kconfig/Makefile
the graphical configurator support broke.

The following patch is a minimal fix, required to restore support
of 'make xconfig' and 'make gconfig'.

A small bug in local.h apparently got copied a few times.
I noticed this because I copied the same bug to s390.
This patch should fix the occurrences in BK, but there
are others that are not merged yet, e.g. ppc64 in -mm3.

This is a rewrite of the awe_wave detection code that will allow this
driver to be compiled.  It moves detection functions to a common
location at the end of the file and makes the code driver-model
compatible.  Also it fixes a bug in which the driver could possibly
write to incorrect ports when using isapnp cards.

Unfortunantly I do not currently have an AWE32 to test these changes so
I could only check for compilation and driver registration.

There was a quite nasty long standing bug in the x86-64 port.  The
interrupt gates had a DPL of 3, allowing user space to trigger any
interrupt.  I have not found a way to exploit it this to crash the
kernel, but it definitely shouldn't happen.  It could e.g.  cause
problems with drivers that do not handle shared interrupt properly.

This also broke some programs who assumed that int <random number>
causes a signal.

Various compile fixes for x86-64 in the current BKCVS tree.

- Use new information from acpi_pci_link_get_irq: handle 
  edge and level triggered interrupts properly
- Fixes for pci_dev->pretty_name 

Only changes x86-64 specific code.

Linux historically has had. Only x86-64 uses anything else, so
make the special case be _there_.

- Don't leave resource name uninitialized if CONFIG_EISA_NAME is not set.
- Print root device bus_id (so we know which bridge is probed).
- From Zwane Mwaikambo : Add a release method to virtual root, so it
  stays quiet if probing fails (because some pci-eisa bridge have been
  found before).

From: Mark Hemment <markhe@veritas.com>

  For RPC over UDP, after receiving a packet kick another thread as soon
as possible.  This helps NFS performance.

This is important on multi-homes hosts.

Just make sure that once SK_DEAD is set, nothing is attempted on the socket.

From: Bernardo Innocenti <bernie@develer.com>

sysctl.h needs compiler.h

Fix infinite loop in the device probe function.

From: Peter Osterlund <petero2@telia.com>

It oopses on module unload in the kobject layer due to misordered destruction
of things.

And we need to initialise the unplug timer in blk_alloc_queue(), because we
kill that timer in blk_alloc_queue()'s companion function,
blk_cleanup_queue().

From: Philippe Elie <phil.el@wanadoo.fr>

If drain_array_locked() is passed the `force' command, it must go in and
empty the head array.

This driver has a global list of devices which has no locking.

If the driver fails partway through probing, the recovery code will call
ac97_release_codec(NULL), which oopses.

From: Stephen Smalley <sds@epoch.ncsc.mil>

This patch fixes a bug in the SELinux module by adding a check of the
filesystem labeling behavior value obtained from the policy.

From: Stephen Smalley <sds@epoch.ncsc.mil>

This patch fixes a bug in the SELinux access vector cache code, which was
incorrectly using spin_lock_irq rather than spin_lock_irqsave for the
avc_log_lock.  As this code can be called from hardirq (e.g.  from the
file_send_sigiotask hook), we need irqsave/restore here.

From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

ioctx_alloc() leaks an mm->mm_count ref on an error path.

From: Sean Estabrooks <seanlkml@rogers.com>

- fix space at end of line in config files;

- add error check on put_user(); (Daniele Bellucci <bellucda@tiscali.it>)

- add missing Kconfig piece for ikconfig;

From: Oliver Xymoron <oxymoron@waste.org>

Currently, a writepage() which detects that it is writing outside i_size (due
to concurrent truncate) will abandon the write, returning -EIO.

The return value will bogusly cause an error to be recorded in the
address_space.  So convert all those writepage() instances to return zero in
this case.

From: Oliver Xymoron <oxymoron@waste.org>

This patch just saves a few bytes in the inode by turning mapping->gfp_mask
into an unsigned long mapping->flags.

The mapping's gfp mask is placed in the 16 high bits of mapping->flags and
two of the remaining 16 bits are used for tracking EIO and ENOSPC errors.

This leaves 14 bits in the mapping for future use.  They should be accessed
with the atomic bitops.

From: Oliver Xymoron <oxymoron@waste.org>

These patches add the infrastructure for reporting asynchronous write errors
to block devices to userspace.  Error which are detected due to pdflush or VM
writeout are reported at the next fsync, fdatasync, or msync on the given
file, and on close if the error occurs in time.

We do this by propagating any errors into page->mapping->error when they are
detected.  In fsync(), msync(), fdatasync() and close() we return that error
and zero it out.


The Open Group say close() _may_ fail if an I/O error occurred while reading
from or writing to the file system.  Well, in this implementation close() can
return -EIO or -ENOSPC.  And in that case it will succeed, not fail - perhaps
that is what they meant.


There are three patches in this series and testing has only been performed
with all three applied.

From: mikep@csd.uu.se

There has been a number of problem reports about local APIC
interacting badly with ACPI on P4s due to the P4 local APIC
force-enable change in 2.5.74,

This patch reverts the 2.5.74 patch, so if the BIOS disables
the local APIC on a P4, we don't enable it by default any more.

The rescue the situation for those P4 systems where the local
APIC _can_ be enabled safely, I've added two kernel parameters
that can be used to override broken BIOSen:
- "nolapic" prevents the kernel from enabling or using the local
  APIC. This is stronger than listing a machine in the DMI scan
  blacklist, since it also works for machines that boot with the
  local APIC already enabled.
- "lapic" tells the kernel to force-enable the P4 local APIC if
  the BIOS disabled it. I haven't changed the logic for P6/K7
  family processors, so we still force-enable those unless
  "nolapic" was passed to the kernel.

The patch also includes a cleanup: the dont_use_local_apic_timer
flag variable is not set any more since 2.5.74, so it's removed.

From: Eric Valette <eric.valette@free.fr>

The following patch integrated in 2.5.74,

<http://lists.insecure.org/lists/linux-kernel/2003/Jun/5840.html>

really enables the APIC even if BIOS disabled it. Unfortunately,
enabling APIC really does not seem to work on this ASUS laptop and ACPI
(which is mandatory) crash the kernel in ACPI code at boot time while
"Executing all Devices _STA and_INIT methods"

Unless someones find a bug in ACPI code related to APIC management, It
is safer to add this machine in the DMI black list (along with DELL,
IBM, ...).

So, as suggested by the author of the problematic change, I added and
entry in the DMI black list. But my guess is that most laptop will soon
be present in this list....

From: Ernie Petrides <petrides@redhat.com>

(I can't get anyone to review this, but I'm sure there's a bug in there, and
Ernie's patch has been in -mm for some time).


There is a long-standing locking hole in the kernel's handling of the
signals related to stopping and resuming processes.  When a process
handles SIGSTOP, SIGTSTP, SIGTTIN, or SIGTTOU, the "sighand" lock is
held while the signal is dequeued and appropriate masks are updated.
But the "sighand" lock is dropped in several cases before the task's
state is changed to TASK_STOPPED (or before a group-stop is initiated).

If a process running on another cpu posts a SIGCONT or SIGKILL just after
the "victim" process releases the lock but before its state is set to
TASK_STOPPED, the corresponding wakeup will be lost and the victim will
remain stopped despite the successive SIGCONT or SIGKILL.  In this case,
a repeated posting of SIGCONT or SIGKILL will have no effect, since the
original one is already pending (and so causes a repeated posting to be
discarded).  The occurrence of a SIGSTOP/SIGKILL race where the victim
has blocked all other signals will result in an unkillable process.

Although a fabricated test program can reproduce a SIGSTOP/SIGCONT race
hang in less than a minute (on a 2-cpu Dell Precision 450), the scenario
that has been most frequently encountered is a hang during reboot or
shutdown.  This occurs because /sbin/killall5 brackets the scanning of
/proc/* and associated signal posting to (most) of the processes still
running with kill(-1, SIGSTOP) and kill(-1, SIGCONT) calls to temporarily
freeze every process except for "init".  Occasionally, its parent (running
the /etc/rc6.d/S01reboot shell script) gets stuck in TASK_STOPPED state
with pending SIGCONT and SIGCLD signals, but with no other process left
to wake it up.

In order to fix the race condition, the locking in do_signal_stop()
and get_signal_to_deliver() needed reworking to close the hole.  Due
to lock ordering issues between the "sighand" lock and tasklist_lock,
there are two cases where the former lock needs to be released and
then reacquired, thus allowing a tiny hole for a SIGCONT/SIGKILL to
be posted.  These two cases are resolved by rechecking for a pending
SIGCONT/SIGKILL after the locks are (re)acquired in the proper order.

Anyone wanting a copy of the test program may e-mail me off-list.

From: Andi Kleen <ak@suse.de>

POSIX says si_band in siginfo_t must be long. glibc uses this, except
for Alpha.

This type must be correct on little endian machines, otherwise
Konqueror does not get any events from dnotity for created/deleted files.

Currenly asm-generic/siginfo.h uses int, which is wrong.

This patch adds a new macro __ARCH_SI_BAND_T which is int for alpha
and long for everybody else. This makes the type on x86-64 come out
correctly