This clarifies more of the x86 caller/callee stack ownership
issues by making the exception and interrupt handler assembler
interfaces use register calling conventions.

System calls still use the stack.

Tested with "crashme" on UP/SMP.

We need to open the gap between congestion on/off a little bit, or we
risk burning many cycles continually putting processes on a wait queue
only to wake them up again immediately. This was observed with CFQ at
least, which showed way excessive sys time.

Patch is from Arjan.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Patch is from Daniel Drake <dsd@gentoo.org>
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

Signed-off-by: David S. Miller <davem@davemloft.net>

Using idr_get_new_above in init_new_context lets us get rid of an
awkward init function which wasn't running early enough in boot
anyway.
Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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

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

The routine ext2_readdir() will, when reading a directory page
returns an error, try the next page, without reporting the
error to user space. That is bad, and the patch below changes that.

In my case the filesystem was damaged, and ext2_readdir wanted
to read 60000+ pages and wrote as many error messages to syslog
("attempt to access beyond end"), not what one wants.

[no doubt a similar patch is appropriate for ext3]

This preserves 2.4.x behavior.
Signed-off-by: David S. Miller <davem@davemloft.net>

It is updated outside of locks, so...
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

Collaborative work between David S. Miller and
Herbert Xu.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

bits_wanted is expanded to bytes using the wrong shift value
(when iovp_shift != PAGE_SHIFT), resulting in an explosion of
used iommu resources.

This potentially results in mistakenly running out of DMA mapping
resources when the system is under *heavy* i/o load.
Signed-off-by: Nigel Croxon <nigel.croxon@hp.com>
Signed-off by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

into nuts.davemloft.net:/disk1/BK/net-2.6

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Transforms old policer to use generic statistic via TCA_STATS2
and maintain backward compatibility via TCA_STATS. Adds a new
API for classifiers to invoke the dumping process.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Dumps the statistic common to all action modules via the newly
introduced TLV type TCA_ACT_STATS in tcf_action_copy_stats but
allows the corresponding module to dump its own statistic by
implementing the get_stats callback.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

ia64_sn_plat_specific_err_print() ends up calling vfree() which
requires IPI which can deadlock if interrupts are disabled.  Do not
disable interrupts in ia64_sn_plat_specific_err_print().
Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

Patch from Matthew Wilcox:
  Since some ia64 platforms have non-identity-mapped PCI busses, we need
  to implement pcibios_resource_to_bus and pcibios_bus_to_resource.
  Also clean up some >80 column comments and delete an unnecessary parameter
  to pcibios_fixup_device_resources().
Signed-off-by: Tony Luck <tony.luck@intel.com>

Based upon a patch from Herbert Xu:

> Hi Ingo:
> 
> Your recent fix to dev_queue_xmit moved the local_bh_disable to
> include stuff like skb_linearize and skb_checksum_help.  These
> are potentially expensive operations.  Since they don't need to
> run with preempt off, we could simply move the local_bh_enable
> up instead.

No, this breaks the normal return path.

How about this instead?
Signed-off-by: Tommy S. Christensen <tommy.christensen@tpack.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch allows tcpdiag to support ipv6 work as a module when itself
is also a module.

I was planning for a more extensible method but now I think the effort
would be better directed at a new generic socket netlink interface than
the TCP-specific tcpdiag.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

into intel.com:/data/home/aegl/BK/linux-ia64-release-2.6.10

The new atyfb has the return value for the Power Management routine
wrong. This prevents sleep from working on PowerBooks with mach64
video chips. This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

XFree (and X.org) has both always been broken in their conversion of the DPMS
blanking mode when passing to the kernel ioctl FBIOBLANK (in fbdev mode).

This patch makes sure that at least the value passed by userland stays in the
legal range, which has the side effect that an X DPMS POWERDOWN request will
result as an fbdev VESA_POWERDOWN request at the fbdev level now, instead of
an out-of-range value.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Small tweaks to the checksumming routines
Fix a corner case in csum_partial
Committed-by: Randolph Chung <tausq@parisc-linux.org>

Superio cleanup
Committed-by: Grant Grundler <grundler@parisc-linux.org>

The default interruption handler "handle_interruption" does not properly
check to see if the faulting space is the same as the users space.
The problem lies in the fact that if a fault happens on the gateway we
will not deliver signals to the process, the process will not die, and we
may continue handling the same fault in a loop forever.  Any malicious
user code can crash the kernel by jumping into the gateway page at an
inopportune address.

The solution is to check if the user has the right privilege and if the
spaces match, both faulting and currently active. The best action is to
force the process back to it's own space of execution at address zero, and
let it take a SIGSEGV. The process can never recover from this because it
happens immediately after the return from the interrupt via rfi or rfir.
Committed-by: Carlos O'Donell <carlos@parisc-linux.org>

Add new syscalls:
tkill, waitid, fadvise64_64, set_tid_address, tgkill, mbind,
[sg]et_mempolicy, {,l,f}{set,get,list,remove}xattr,
timer_{create,settime,gettime,getoverrun,delete},
clock_{settime,gettime,getres,nanosleep}
Committed-by: Matthew Wilcox <willy@parisc-linux.org>

PTRACE_GETEVENTMSG was not 64-bit clean, fix it
Committed-by: Randolph Chung <tausq@parisc-linux.org>

remove the now unused lcopy_*_user routines
Committed-by: Randolph Chung <tausq@parisc-linux.org>

Stop exporting the old memcpy symbols
Committed-by: Randolph Chung <tausq@parisc-linux.org>

dump the stack on a BUG()
Committed-by: Randolph Chung <tausq@parisc-linux.org>

register cpus with sysfs
Committed-by: Randolph Chung <tausq@parisc-linux.org>