Although it usually means that someone has deleted a file on the server,
the ESTALE error may also indicate that the sysadmin has used exportfs to
deny our client access to the server. Most NFS implementations therefore
consider it a non-permanent condition, and allow inodes to "recover" when
the sysadmin re-enables access.
If, however, you want to work with broken servers, like unfsd, that reuse
filehandles for new files after the original file gets deleted, then
"recovery" is impossible, since it may be that the filehandle now points
to a different file. Note that this is broken server behaviour that may
happen even without us ever seeing the ESTALE error.
In order to minimize (but we can never eliminate entirely) this race
condition on unfsd servers, Linux has traditionally made ESTALE a
permanent condition on all filehandles except the root filehandle.

The problem is that if we apply this strict staleness criterion to
directories (particularly so for he current directory), then all
processes will need to re-walk the path starting from the mount point,
in order to recover from the sysadmin intervention case. As this is not
usual on other *NIX implementations, and may in any case be undermined by
caching rules etc, this is being seen as a usability problem.

This patch makes ESTALE a non-permanent condition on directories, but
preserves the current behaviour for non-directories.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

 Replace the kmalloc() and kfree() calls in this path with appropriate
 invocations of nfs_writedata_alloc() and nfs_writedata_free().  This
 makes nfs_writepage_sync match all the other write paths in fs/nfs/write.c.

 Category: Maintainability, performance
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

as a void * when we know perfectly well what it is.  And we're passing
some arguments that we don't actually use.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

unwisely revived it for use with the gss code.  Having removed that use
from the gss code, it's time to remove all references to it.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

indicate failure of an upcall to get a gss context for that cred,
set the status of waiting tasks to indicate failure.

This solves problems e.g. with creds with the CRED_DEAD flag set
never being refreshed, which caused krb5 mounts to fail after the
context used to do RENEWS expired.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

the cred containing the context non-uptodate, triggering creation of
a new context.

Note that on the send-side operations (get_mic, wrap), we mark the
cred as not uptodate, but continue trying to use it; the server can
complain if it wants to, and the next time through we'll refresh it.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

       asynchronous RPC calls.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

       credentials when they are available.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

     qstr.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

     calls renders nfs_cached_lookup() obsolete.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

     through the directory.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

  People are worrying about spinlock deadlocks in the debugging code, without
  actually worrying about the bugs that triggered the debugging code in the
  first place.
  Convert to BUG_ON() in order to ensure that bugs are reported.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

  Shirly Ma reported seeing problems with rpc_killall_tasks() causing
  the task->tk_magic debugging test to trigger. It turns out we may be
  killing tasks that are not yet running or even initialized.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

     spinlocks.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

reason the user migth want to see it.

Under any normal use it gets auto-selected by PS/2 mouse or ATKBD
support anyway, and if those aren't selected there's no reason to
select this one either unless you have some very special uses.

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

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

arch/x86_64/mm/init.c: In function `in_gate_area_no_task':
arch/x86_64/mm/init.c:656: warning: suggest parentheses around && within ||
In file included from include/asm/numa.h:5,
                 from arch/x86_64/kernel/setup.c:60:
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>

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

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

Patch from Liam Girdwood

This patch allows the PXA SSP port configuration to be changed without
the need to close the port.

Signed-off-by: Liam Girdwood
Signed-off-by: Russell King

This changes kernel domains to use domain 0 rather than domain 1,
in preparation to supporting supersection mappings.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>

Patch from Liam Girdwood

This patch adds the PXA27x SSP port 3 configuration register space (Phys
0x41900000) to the kernel memory table.

Signed-off-by: Liam Girdwood
Signed-off-by: Russell King

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

From: Lennart Poettering

Trivial patch against Linux 2.6.10 which adds PNP support for a
certain kind of Rockwell 28.8/ISA modems.

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

Since all users of this have now been eliminated, we can eliminate
the element itself.  MMC host drivers now operate only on the
scatter lists passed to them, rather than needing knowledge of
block devices.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>

From: Pierre Ossman

Cleanup that fixes a warning in the wbsd module.

noexec_setup runs too late to take any effect, so parse it earlier.
Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>

sclp: core driver cleanup

Details:
- moved signal shutdown (quiesce) handling into a separate file
- cleanup of SCLP core driver:
  . introduced driver states instead of bits
  . introduced request retry count and retry limit
  . sclp_add_request now returns an error code if a request couldn't be started
  . introduced separate request structure for init_mask requests to simplify
    code
  . request timer is now manually checked in sclp_sync_wait because timer
    interrupts are disabled in this context
  . removed busy timer - request timer now handles both cases
  . split up sclp_start_request into __sclp_start_request and sclp_process
    queue
  . removed sclp_error_message (unused)
  . introduced sclp_check_handler function to split up initial init mask
    test from standard init mask request processing
  . introduced sclp_deactivate and sclp_reactivate for simplified reboot
    event handling (and potential use in suspend/resume scenario)
  . added protection against multiple concurrent init mask calls
- minor changes in SCLP core driver:
  . updated comments
  . renamed functions to be consistent with "function name starts with __ =>
    needs lock"
  . renamed internal functions for consistency reasons
  . introduced inlined helper functions to simplify code
  . moved EXPORT_SYMBOL definitions next to function definition
- changes in sclp console driver
  . removed callback recursion to prevent stack overflow
- changes to CPI module
  . added check for sclp_add_request return code
  . changed printks to specify a message level
- changes to generic sclp tty layer
  . removed timed buffer retry after error (timers may not work in some
    situations)
  . introduced return code for sclp_emit_buffer
- changes to sclp tty driver
  . removed callback recursion
- changes to sclp vt220 driver
  . removed callback recursion
  . removed timed buffer retry after error
- modified sclp_init_mask to prevent problems with some compiler versions
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Carsten Otte <cotte@de.ibm.com>

 - Fix codingstyle.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
From: Stefan Bader <shbader@de.ibm.com>

character device driver changes:
 - tape: Correct module count usage.
 - 3270: Use mod_timer only when timer is pending.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>

dasd driver changes:
 - Modify format analysis routine to use block size provided by on-disk label.
 - Search data structures when referencing use_diag/ro attribute values.
 - Correct return code checking when allocating memory.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>