jfs_get_blocks should return up to the number of blocks in the
extent rather than limiting itself to one block, as the initial,
trivial implementation did.  This greatly reduces the overhead of
O_DIRECT reads and writes.

Submitted by Badari Pulavarty (pbadari@us.ibm.com)

Submitted by Steve Best.

into kleikamp.austin.ibm.com:/home/shaggy/bk/acl-2.5

All callers of invalidate_metapages() actually have a dxd_t or pxd_t to
invalidate, so add invalidate_pxd_metapages() and invalidate_dxd_metapages()
routines with a common __invalidate_metapages() backend instead.

Start to invalidate the EA/ACL extents, we'll need that soon.

Submitted by Christoph Hellwig

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

requested, also fix a possible race with two processes using the same
file descriptor.

Archs can define i8042 access in i8042-io*.h

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Misc. kernel preemption-related bits.  Specifically,

 - update to Documentation/preempt-locking.txt (me)

 - preempt-safe arch/i386/kernel/ioport.c :: sys_ioperm()
   (George Anzinger)

 - remove "kernel_lock()" cruft in include/linux/smp.h
   (Andrew Morton)

 - we have a debug check in preempt_schedule that, even
   on detecting a schedule with irqs disabled, still goes
   ahead and reschedules.  We should return. (me)

 - preempt-safe net/core/dev.c :: netif_rx() (George Anzinger)

The raid5 xor checksums use MMX/SSE state and are not preempt-safe.

Attached patch disables preemption in FPU_SAVE and XMMS_SAVE and
restores it in FPU_RESTORE and XMMS_RESTORE - preventing preemption
while in fp mode.

Neither lockd nor rpciod properly drop the BKL on exit.

Yes, the BKL is automatically relinquished on schedule but the failure
to drop the lock throws off the atomic accounting and results in a
preempt_count warning on exit.

This makes them play fair - it does not hurt.

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

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

into nuts.ninka.net:/home/davem/src/BK/sparc-2.5

into nuts.ninka.net:/home/davem/src/BK/sctp-2.5

- also fix sctp.h declaration type of sctp_get_port