From: William Lee Irwin III <wli@holomorphy.com>

The stack is now shared with struct thread_info on most arches, not task_t.
This mostly affects get_wchan() and stack usage debug.

From: William Lee Irwin III <wli@holomorphy.com>

The stack is now shared with struct thread_info on most arches, not task_t.
This mostly affects get_wchan() and stack usage debug.

From: William Lee Irwin III <wli@holomorphy.com>

The stack is now shared with struct thread_info on most arches, not task_t.
This mostly affects get_wchan() and stack usage debug.

hugepage_vma() is both misleadingly named and unnecessary.  On most archs it
always returns NULL, and on IA64 the vma it returns is never used.  The
function's real purpose is to determine whether the address it is passed is a
special hugepage address which must be looked up in hugepage pagetables,
rather than being looked up in the normal pagetables (which might have
specially marked hugepage PMDs or PTEs).

This patch kills off hugepage_vma() and folds the logic it really needs into
follow_huge_addr().  That now returns a (page *) if called on a special
hugepage address, and an error encoded with ERR_PTR otherwise.  This also
requires tweaking the IA64 code to check that the hugepage PTE is present in
follow_huge_addr() - previously this was guaranteed, since it was only called
if the address was in an existing hugepage VMA, and hugepages are always
prefaulted.

From: Bart Samwel <bart@samwel.tk>

The reiserfs patch that adds support for "commit=0" saves the default max
commit age in a variable when the fs is originally mounted, so that it can
later restore it.  Unfortunately it makes some mistakes with that:

- The default is not saved when the original mount has a commit=NNN option.

- The default is not correctly saved for older reiserfs filesystems, where
  the default was not stored on disk.

This patch fixes these mistakes.

From: me, Badari Pulavarty <pbadari@us.ibm.com>

Currently a direct-IO read or write of more than 2G on 64-bit machines is
broken.  Replace int with ssize_t in various places to fix that up.

From: Nathan Lynch <nathanl@austin.ibm.com>

On some larger ppc64 configurations /proc/device-tree is exhausting procfs'
dynamic (non-pid) inode range (16K).  This patch makes the dynamic inode
range 0xf0000000-0xffffffff and changes the inode number allocator to use
the idr.c allocator for the first-fit allocations.

From: Chris Wright <chrisw@osdl.org>

Make sure to return proper retval on unshare_files() error in load_elf_binary.

Error noted by Kirill Korotaev <kirillx@7ka.mipt.ru>.

From: Jim Houston <jim.houston@comcast.net>

- Adds idr_get_new_above(), whihc permits us to do a first-fit search
  from a specified offset rather than always from zero.

- Add IDR_INIT() DEFINE_IDR() constructors.  Often idr's are singletons
  and having to cook up an initcall for them is a pain.

This is needed by the "Increase number of dynamic inodes in procfs" patch.

From: Nigel Cunningham <ncunningham@users.sourceforge.net>

A few weeks ago, Pavel and I agreed that PF_IOTHREAD should be renamed to
PF_NOFREEZE.  This reflects the fact that some threads so marked aren't
actually used for IO while suspending, but simply shouldn't be frozen.
This patch, against 2.6.5 vanilla, applies that change.  In the
refrigerator calls, the actual value doesn't matter (so long as it's
non-zero) and it makes more sense to use PF_FREEZE so I've used that.

From: Nick Piggin <nickpiggin@yahoo.com.au>

Do the typecast thing to permit CPU_MASK_ALL to be used both as an
initialiser and as a normal rvalue.

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

This patch adds the posix message queue syscalls to ppc32 and 64 and fixes
our implementation of compat copy siginfo to 32 bits userland which wasn't
using the si_code but still doing a switch/case on the signal number.

I also reserved some syscalls for the numa API

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

This removes a number of unnecessary includes from the ARM specific
files throughout the kernel.  Most notably asm/pgalloc.h is
needlessly included in several places.  There were some places
including it as a means to get at the cache flushing functions,
so this has been corrected.

This is my brown paper bag day, I sent you the wrong patch for
fixing the deadlock in rtas.c, here's one to apply on top of current
bk that fixes build.

Amiga Zorro8390 Ethernet: Add KERN_* prefixes to printk() messages

Amiga Hydra Ethernet: Add KERN_* prefixes to printk() messages

Amiga Ariadne Ethernet: Add KERN_* prefixes to printk() messages

Amiga A2065 Ethernet: Add missing variable in debug code

From: Andrey Panin <pazke@donpac.ru>

this small patch fixes visws build error in 2.6.5.

From: Bart Samwel <bart@samwel.tk>

Currently, an `hdparm -Y' can trigger a sync in laptop mode.  We should
only count fs-originated requests as being "disk activity".

Take the idr's lock while removing an element on the error path.  Spotted by
Nathan Lynch <nathanl@austin.ibm.com>.

From: Rusty Russell <rusty@rustcorp.com.au>

People still build modules wrong, particularly without -fno-common.  The
resulting modules don't load, but we should at least warn about it.

Reduce the locking coverage of the oft-used j_list_lock: the per-bh
jbd_lock_bh_state() gives us sufficient locking of buffer_head and
journal_head internals.

From: Hugh Dickins <hugh@veritas.com>

The earlier changes introducing PageAnon left truncated pages mapped into
nonlinear vmas unswappable.  Once we go to object-based rmap, it's
impossible to find where file page is mapped once page->mapping cleared:
switching them to anonymous is odd, and breaks strict commit accounting.

So now handle truncation of nonlinear vmas correctly.  And factor in
Daniel's cluster filesystem needs while we're there: when invalidating
local cache, we do want to unmap shared pages from all mms, but we do not
want to discard private COWed modifications of those pages (which
truncation discards to satisfy the SIGBUS semantics demanded by specs).

Drew from Daniel's patch (LKML 2 Mar 04), but didn't always follow it;
fewer name changes, but still some - "unmap" rather than "invalidate".
zap_page_range is not exported, safe to give it and all the too-many layers
an extra zap_details arg, in normal cases just NULL.

Given details, zap_pte_range checks page mapping or index to skip anon or
untruncated pages.  I didn't realize before implementing, that in nonlinear
case, it should set a file pte when truncating - otherwise linear pages
might appear in place of SIGBUS.  I suspect this implies that ->populate
functions ought to set file ptes beyond EOF instead of failing, but haven't
changed them as yet.

To avoid making yet another copy of that ugly linear pgidx test, added
inline function linear_page_index (to pagemap.h to get PAGE_CACHE_SIZE,
though as usual things don't really work if it differs from PAGE_SIZE). 
Ooh, I thought I'd removed ___add_to_page_cache last time, do so now.

unmap_page_range static, shift its hugepage check up into sole caller
unmap_vmas.  Killed "killme" debug from unmap_vmas, not seen it trigger.
unmap_mapping_range is exported without restriction: I'm one of those who
believe it should be generally available.  But I'm wrongly placed to decide
that, probably just sob quietly to myself if _GPL added later.

From: Hugh Dickins <hugh@veritas.com>

Good example of "swapper_space considered harmful": swap_unplug_io_fn was
originally designed for calling via swapper_space.backing_dev_info; but
that way it loses track of which device is to be unplugged, so had to
unplug all swap devices.  But now sync_page tests SwapCache anyway, can
call swap_unplug_io_fn with page, which leads direct to the device.

Reverted -mc4's CONFIG_SWAP=n fix, just add another NOTHING for it.
Reverted -mc3's editorial adjustments to swap_backing_dev_info and
swapper_space initializations: they document the few fields which are
actually used now, as comment above them says (sound of slapped wrist).

From: Hugh Dickins <hugh@veritas.com>

One of the callers of flush_dcache_page is do_generic_mapping_read, where
file is read without i_sem and without page lock: concurrent truncation may
at any moment remove page from cache, NULLing ->mapping, making
flush_dcache_page liable to oops.  Put result of page_mapping in a local
variable and apply mapping_mapped to that (if we were to check for NULL
within mapping_mapped, it's unclear whether to say yes or no).

parisc and arm do have other locking unsafety in their i_mmap(_shared)
searching, but that's a larger issue to be dealt with down the line.

From: Anton Blanchard <anton@samba.org>

Oprofilefs cant handle > 99 cpus. This should fix it.

From: Rusty Russell <rusty@rustcorp.com.au>

# lsmod
Module                  Size  Used by
1                      26060  6
#

The compiler #define's unix to 1: we use -DKBUILD_MODNAME=unix.  We used to
#undef unix at the top of af_unix.c, but now the name is inserted by
modpost, that doesn't help.

#undef unix in modpost.c's generated C file.

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

My RTAS locking fixes incorrectly added a spinlock around the function used
to stop a CPU, that function never returns, thus the lock becomes stale.
The correct fix is to disable interrupts instead (the RTAS params beeing
per-CPU, this should be safe enough)

But obviously only if we're not passing in any offset pointer.

This is how 2.4.x worked, and vsftpd relies on it.

Bug reported by Chris < chris@scary.beasts.org>

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

This adds detailed documentation concerning how we map the Linux
page table structure onto the hardware tables on ARM.  In addition,
it also adds documentation describing how we emulate the "dirty"
and "young" or "accessed" page table bits.

This should be of interest to Linux MM developers.

It occurred to me that if vma and new_vma are one and the same, then
vma_relink_file will not do a good job of linking it after itself - in
that pretty unlikely case when move_page_tables fails.

And more generally, whenever copy_vma's vma_merge succeeds, we have no
guarantee that old vma comes before new_vma in the i_mmap lists, as we
need to satisfy Rajesh's point: that ordering is only guaranteed in the
newly allocated case.

We have to abandon the ordering method when/if we move from lists to
prio_trees, so this patch switches to the less glamorous use of
i_shared_sem exclusion, as in my prio_tree mremap.

The field in question is
  a) unused
  b) damn next to impossible to use correctly, due to struct super_block
     lifetime and locking rules.

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

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

Update serial to use new module parameters rather than
MODULE_PARM.