From: Anton Blanchard <anton@samba.org>


Anton has been testing odd setups:

/* node 0 - no cpus, no memory */
/* node 1 - 1 cpu, no memory */
/* node 2 - 0 cpus, 1GB memory */
/* node 3 - 3 cpus, 3GB memory */

Two things tripped so far.  Firstly the ppc64 debug check for invalid cpus
in cpu_to_node().  Fix that in kernel/sched.c:node_nr_running_init().

The other problem concerned nodes with memory but no cpus.  kswapd tries to
set_cpus_allowed(0) and bad things happen.  So we only set cpu affinity
for kswapd if there are cpus in the node.

compat_sys_getrusage was returning the result of a logical or. Make
it return the result of sys_getrusage if it fails or -EFAULT if we
cant write it out to userspace.

Last night, Manfred and I found an interesting bug with kmalloc on
ppc32, where the kmalloc in alloc_super() (fs/super.c) was requesting
432 bytes but only getting 256 bytes.  The reason was that PAGE_SIZE
wasn't defined at the point where the kmalloc() inline function
occurs.  Thus the CACHE(32) entry got omitted from the list in
kmalloc_sizes.h, and kmalloc therefore used the entry in
malloc_sizes[] before the correct entry.

This patch fixes it by including asm/page.h and asm/cache.h in
linux/slab.h.  The list in kmalloc_sizes.h depends on L1_CACHE_BYTES
as well as PAGE_SIZE, which is why I added asm/cache.h.

This patch cleans up a few leftovers after Mochel's recent
driver model changes. Tested. Please apply.

- arch/i386/kernel/apic.c: <linux/module.h> no longer needed
- include/asm-i386/apic.h: device_lapic no longer exported

This patch removes the x86 local APIC blacklist rules for the
Microstar 6163 and Intel AL440LX mainboards. These boards do
work with local APIC enabled. Heavily tested. Please apply.

Long story: When I worked on the initial UP_APIC code, these
two mainboard (MS-6163 and AL440LX) were the only ones that
caused hangs when the local APIC was enabled. At the time,
I attributed these hangs to broken BIOSen and implemented DMI
scan blacklist rules to prevent enabling the local APIC on them.

However, the last year I've observed hangs on other mainboards
that initially were believed to be safe for local APIC. The
hangs turned out to be caused by APM's DISPLAY_BLANK option:
When this option is enabled, APM will invoke BIOS and graphics
card BIOS code without disabling the local APIC first. In many
cases, a local APIC timer interrupt while APM is trying to blank
the console will hang the system.

APM also has two other options that can hang the system: CPU_IDLE
and building APM as a module, both of which causes it to do BIOS
calls without disabling the local APIC first. On all my systems,
the only reliable configuration is to keep APM's DISPLAY_BLANK and
CPU_IDLE disabled, and to build APM non-modular.

Patch by Matthew Wilcox.

Allows all architectures to simply include the drivers/ide/Kconfig file.

Patch by Benjamin Herrenschmidt, minor fixes by me.

Unexpectedly there are some taskfile IO bugreports,
so bring back old code and add taskfile IO config option (default y).
This aids testing and lets people use safe(?) old code.

into home.transmeta.com:/home/torvalds/v2.5/linux

From: Manfred Spraul <manfred@colorfullife.com>

Martin found out what caused the deadlocks with 2.5.70 and SDET: I forgot
to initialize proc_lock during fork().  Usually this works, because the
parent lock is unlocked.  But a proc lookup during fork can cause it to be
locked, and then the system locks up.

1) Fix the comments for the migration_thread.  A while back Ingo
   agreed they were exactly wrong, IIRC. 8).

2) Changed spin_lock_irqsave to spin_lock_irq, since it's in a
   kernel thread.

3) Don't repeat if the task has moved off the original CPU, just finish.
   This is because we are simply trying to push the task off this CPU:
   if it's already moved, great.  Currently we might theoretically move
   a task which is actually running on another CPU, which is v. bad.

4) Replace the __ffs(p->cpus_allowed) with any_online_cpu(), since
   that's what it's for, and __ffs() can give the wrong answer, eg. if
   there's no CPU 0.

5) Move the core functionality of migrate_task into a separate function,
   move_task_away, which I want for the hotplug CPU patch.

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

It was broken on at least ppc32 & sparc32, and the debugging it
offered wasn't worth it any more anyway.

local_irq_save() is called at the beginning of speedstep_detect_speeds,
but local_irq_restore() is not called on I/O errors.

Intel seems to have changed their mind, and now document the detection
process for speedstep-enabled Pentium III Coppermines:

	http://www.intel.com/support/processors/sb/cs-003779-prd24.htm

Here is a patch.

I kept the setup parameter, but it might be removed now?

This patch moves the old board-specific SH code

This gets the toplevel arch/sh stuff in sync with the current SH 2.5
tree.

This bit is left from the zlib changes.  According to Paul, the zlib
bug is already caught in userspace pppd, but not in the kernel ppp
code.  With this patch, there is one potential hickup less in ppp.