Also, default to the 10-byte version of mode sense, since a lot
of modern SCSI-like devices don't even support the old version
(we will automatically downgrade to the 6-byte version if the long
version isn't supported).

in VT_RESIZEX handling.

allocation have only the two standard ports by default.

Which was what MELAN really wanted, and others don't
really care.

Pointed out by Roland Dreier

Yet another Asus motherboard hiding features

We currently mask off offline CPUs in both set_cpus_allowed and
sys_sched_setaffinity.  This is firstly redundant, and secondly
erroneous when more CPUs come online (eg. setting affinity to all 1s
should mean all CPUs, including future ones).

We mask with cpu_online_map() in sys_sched_getaffinity *anyway* (which
is another issue, since this is not valid with changing of online
cpus either), so userspace won't see any difference.

This patch makes set_cpus_allowed() return -errno, and check that in
sys_sched_setaffinity.

Matt Fleming points out that returning int from any_online_cpu
where cpu numbers are passed as unsigned ints elsewhere is awkward
and a little dangerous.

Make any_online_cpu() match find_first_bit(), by returning NR_CPUS
when no cpu is found, rather than -1.  This also simplifies the
future case where NR_CPUS > BITS_PER_LONG.

Make the ROMfs copy in the startup code for Motorola/M5272C3 board
conditional on actually using a ROMfs setup.

Allow for hard setting of boot arguments from configuration for
the Motorola Coldfire 5272 CPU targets.

Make the ROMfs copy in the startup code for Motorola/M5249C3 board
conditional on actually using a ROMfs setup.

Allow for hard setting of boot arguments from configuration for
the Motorola Coldfire 5249 CPU targets.

Remove the empty initializer workaround that was added for egcs 1.1.
Only 2.95+ is supported now, so all compilers should support empty
structures.

The if just checked for __GNUC__, which means that 2.95 got
the workaround (and the incompatibility) too even though it didn't need it.

Advantage is that gcc 2.95 and 3.x compiled kernels are now potentially
binary compatible.  Module loading still checks the compiler version,
but it might be removable.

ext3 and JBD still have enormous numbers of lines which end in tabs.  Fix
them all up.

From: "Stephen C. Tweedie" <sct@redhat.com>

ext3 has long had a problem wherein it will unnecessarily write to a
read-only filesystem during the mount process.  It does this in preparing the
journal superblock's sequence numbers.

But if the filesystem was shut down cleanly we do not need to do this.
Detect the situation and avoid modifying and writing out the journal
superblock.

From: Daniel Phillips <phillips@arcor.de>

This patch restores my copyright notice for the HTree directory index,
inadvertently omitted during the conversion from Ext2 to Ext3.

From: David Mosberger <davidm@napali.hpl.hp.com>

highmem.h uses stuff like page_address(), but fails to include
<linux/mm.h>.

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

The following patch implements node-local memory allocation support for
hugetlb. Successfully tested on NUMA-Q.

From: Jakub Jelinek <jakub@redhat.com>

Any prelinked shared library is impossible to run on ppc64 without this
patch, as they immediately segfault.  Say:

	/bin/echo

works even if /lib64/ld64.so.1 is prelinked while

	/lib64/ld64.so.1 /bin/echo

segfaults.

The problem is that ELF_PLAT_INIT is passed the virtual address of the
shared library, not the difference between the virtual address of the
shared library and p_vaddr of the first PT_LOAD segment in that library
(while for the interpreter interp_load_address is the bias).

ELF_PLAT_INIT sets gpr[2] to this absolute address, but
arch/ppc64/kernel/process.c (start_thread) assumes it is a bias and adds it
to entry and toc values loaded from the entry point descriptor.

For non-prelinked shared libraries, first PT_LOAD segment's p_vaddr is
typically 0 and thus load_addr == load_bias (which is why this bug has not
been discovered that long).

From: Pavel Machek <pavel@ucw.cz>

This fixes suspend with NFS mounts active.

enable_apic_mode needs tobe hooked up.  (It came in with the es7000 merge)

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

Milton Miller <miltonm@bga.com> and Junfeng Yang <yjf@stanford.edu> point
out that we hand a kernel address to sys_wait4 for the status pointer.
This is true, but since we don't have a SIGCHLD handler, it never gets that
far.  Use NULL, and document the fact.

From: "Martin J. Bligh" <mbligh@aracnet.com> and me

proc_pid_lookup() does a put_task_struct() and then continues to play with
the task.

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

A barrier is needed on workqueue shutdown: there's a chance that the thead
could see the wq->thread set to NULL before the completion is initialized.

Also extracts functions which actually create and destroy workqueues, for
use by hotplug CPU patch.

Both sys_sync() and the kupdate function need to precalculate the number of
pages which they are prepared to write.  Mainly for livelock avoidance.

But they also must write inodes, and dirty inodes do not contribute to dirty
page accounting (oops).  Net effect: when there are lots of dirty inodes and
few dirty pages, we forget to write inodes.

This mainly affects atime updates, because most other inode-dirtying activity
will generate dirty pages too.

It mainly affects ext2.


Now, writing an ext2 inode will just dirty the underlying blockdev pagecache
page.  So what the patch does is to assume that writing one inode will dirty
up to one pagecache page.  So the patch adds (inodes_stat.nr_inodes -
inodes_stat.nr_unused) into the number of pages to be written.

I considered creating inodes_stat.nr_dirty.  It looks fairly messy, needing
to know not to account for memory-backed inodes, etc.  But it is probably a
better thing to do.

By moving the special-casing for swapper_space out of __mark_inode_dirty()
and into __set_page_dirty_nobuffers() we can remove swapper_inode.

From: Samuel Thibault <Samuel.Thibault@ens-lyon.fr>

Changes the new console scrolling ioctl to permit distances greater than
+127/-128.

- shmem: remove unneeded test for null inode->i_sb (James Morris)

- kill unused var warning in traps.c (Geert Uytterhoeven)

- s/u64/__u64/ in bitops.h (needed for klibc)

- comment fix in gfp.h (Matthew Dobson <colpatch@us.ibm.com>)

- fix smbfs constant overflow warning (Flameeyes <daps_mls@libero.it>)

- yam.c irqreturn_t fix.

- Remove some unused variables from baycom_epp.c (Adrian Bunk)

- Remove 5-year-old unreferenced RCS string from xirc2ps_cs.c (Adrian Bunk)

update hugetlbfs_statfs for the statfs64() changes.

From: "Seth, Rohit" <rohit.seth@intel.com>

- Add support for setting the filesystem's maximum size and maximum inode
  count on the mount command line.

  This is needed because the system admin can now set the ownership of teh
  fs to non-root users.  We don't want those users to be able to use all of
  the hugepage pool.

- Prroperly update the inode creation/modification time.

- Set the blocksize to HPAGE_SIZE (instead of PAGE_CACHE_SIZE).

- Update Documentation/vm/hugetlbpage.txt.

From: Andrey Borzenkov <arvidjaar@mail.ru>

Add devfs support to raw.c.

From: Manfred Spraul <manfred@colorfullife.com>

The CLONE_SYSVSEM implementation is racy: it does an (atomic_read(->refcnt)
==1) instead of atomic_dec_and_test calls in the exit handling.  The patch
fixes that.

Additionally, the patch contains the following changes:

- lock_undo() locks the list of undo structures.  The lock is held
  throughout the semop() syscall, but that's unnecessary - we can drop it
  immediately after the lookup.

- undo structures are only allocated when necessary.  The need for undo
  structures is only noticed in the middle of the semop operation, while
  holding the semaphore array spinlock.  The result is a convoluted
  unlock&revalidate implementation.  I've reordered the code, and now the
  undo allocation can happen before acquiring the semaphore array spinlock.
   As a bonus, less code runs under the semaphore array spinlock.

- sysvsem.sleep_list looks like code to handle oopses: if an oops kills a
  thread that sleeps in sys_timedsemop(), then sem_exit tries to recover.
  I've removed that - too fragile.

From: David Mosberger <davidm@napali.hpl.hp.com>

This is an attempt at sanitizing the interface for stack trace dumping
somewhat.  It's basically the last thing which prevents 2.5.x from working
out-of-the-box for ia64.  ia64 apparently cannot reasonably implement the
show_stack interface declared in sched.h.

Here is the rationale: modern calling conventions don't maintain a frame
pointer and it's not possible to get a reliable stack trace with only a stack
pointer as the starting point.  You really need more machine state to start
with.  For a while, I thought the solution is to pass a task pointer to
show_stack(), but it turns out that this would negatively impact x86 because
it's sometimes useful to show only portions of a stack trace (e.g., starting
from the point at which a trap occurred).  Thus, this patch _adds_ the task
pointer instead:

 extern void show_stack(struct task_struct *tsk, unsigned long *sp);

The idea here is that show_stack(tsk, sp) will show the backtrace of task
"tsk", starting from the stack frame that "sp" is pointing to.  If tsk is
NULL, the trace will be for the current task.  If "sp" is NULL, all stack
frames of the task are shown.  If both are NULL, you'll get the full trace of
the current task.

I _think_ this should make everyone happy.

The patch also removes the declaration of show_trace() in linux/sched.h (it
never was a generic function; some platforms, in particular x86, may want to
update accordingly).

Finally, the patch replaces the one call to show_trace_task() with the
equivalent call show_stack(task, NULL).

The patch below is for Alpha and i386, since I can (compile-)test those (I'll
provide the ia64 update through my regular updates).  The other arches will
break visibly and updating the code should be trivial:

- add a task pointer argument to show_stack() and pass NULL as the first
  argument where needed

- remove show_trace_task()

- declare show_trace() in a platform-specific header file if you really
  want to keep it around

From: John Stultz, George Anzinger, Eric Piel

There was confusion over the definition of TICK_USEC.  TICK_USEC is
supposed to be based on USER_HZ, however a recent change caused TICK_USEC
to be based on HZ.  This broke the adjtimex() interface on systems where
USER_HZ != HZ.  This patch reverts the change to TICK_USEC, removes an
added mis-use of the value and fixes some incorrect comments that could
lead to this sort of confusion.

Also this patch resolves the related LTP adjtimex failures.

From: David Mosberger <davidm@napali.hpl.hp.com>

At the moment, if you don't set CLONE_CHILD_SETTID/CLONE_CHILD_CLEARTID,
the {set,clear}_child_tid values get inherited from the parent task.  I may
be missing something, but I suspect that's not the intended behavior.  The
patch below instead clears the respective members.

The slab debugging code is supposed to poison freshly-allocated obejcts with
0x5a and freed ones with 0x6b, so we can distinguish use-uninitialised from
use-after-free.

It wasn't working right for recycled objects.  Fix.

Use slab_error for printing the error message from kmem_cache_destroy

From: Peter Chubb <peter@chubb.wattle.id.au>

Add two new system calls, statfs64 and fstatfs64.  This has been needed
sincew the 64-bit sector_t merge - the current structures will overflow.

- Use a common interface (vfs_statfs) with the rest of the kernel,

- convert to 32-bit at (f)statfs time.

- New field f_frsize gives underlying fragment size for the filesystem.
  (Solaris has this, and the Open Group describe it).

- The old statfs syscalls will now return -EOVERFLOW if the device was
  too large to be represented inthe old data structures.

The new system calls take a size_t argument, which is the size of the
structure to be filled in (as requested by Ben LaHaise), to `futureproof' the
interface.

Has been reviewed by the arch maintainers and by Ulrich Drepper.

From: Andi Kleen <ak@suse.de>

On i386 and most other ports kern_addr_valid is hardcoded to 1.

This works fine as long as only mapped areas are accessed.  When you have
something partially mapped in the kclist it is possible that start points to
an unmapped address.  The correct behaviour in this case is to zero the user
space.  We shouldn't return -EFAULT because the fault is against the mmapped
range, not against the user's address.

copy_to_user usually even checks for exceptions on both source and
destination, but it does not zero the destination in this case and worse
results in EFAULT, which is user visible.

This patch just tries to clear_user in this case again to actually zero the
user data and catch real user side EFAULTs.

Another way to fix this is to have kern_addr_valid do a real page table
lookup (I did that on AMD64), but having this fallback is a bit more
reliable in case there is a race somewhere.

On i386 it could happen for example if the direct space to max_low_pfn
contains something unmapped.  This normally isn't the case, but e.g.  the
slab debugging patches in -mm* do this so it's better to handle it.

Drawback is that it relies on a somewhat undocumented copy_to_user behaviour
(fault on both source and destination).  It is true for i386 and amd64, but I
don't know if it is for other port.  In the worst case they just don't have
the race protection and may see bogus EFAULTs.

From: Andi Kleen <ak@suse.de>

The recent IA64 changes for /proc/kcore broke the access on i386.
Currently no notes are written for the direct mapped or vmalloced memory,
which makes gdb reject it.

This patch fixes it.  Other ports probably need to do the same changes.

If you open /dev/ram7 when the kernel is configured for 4 ramdisks, things
blow up.  Teach rd_open() to check that the minor is in range.

If someome tries to unmount the fs while kjournald is performing a commit,
kjournald forgets to look for the termination request and goes into permanent
sleep.