In _spin_unlock_bh(lock):
	do { \
		_raw_spin_unlock(lock); \
		preempt_enable(); \
		local_bh_enable(); \
		__release(lock); \
	} while (0)

there is no reason for using preempt_enable() instead of a simple
preempt_enable_no_resched()

Since we know bottom halves are disabled, preempt_schedule() will always
return at once (preempt_count!=0), and hence preempt_check_resched() is
useless here...

This fixes it by using "preempt_enable_no_resched()" instead of the
"preempt_enable()", and thus avoids the useless preempt_check_resched()
just before re-enabling bottom halves.
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

with high-speed mode enabled, we switch it to high-speed mode so that
baud_base becomes 921600. However, we also need to multiply the baud
divisor by 8 at the same time, in case it's already in use as a console.

Signed-off-by: David Woodhouse
Acked-by: Tom Rini
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Needed for the powernow k8 driver for dual core support.
Signed-off-by: NAndi Kleen <ak@suse.de>
Cc: <mark.langsdorf@amd.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This works around the too fast timer seen on some ATI boards.

I don't feel confident enough about it yet to enable it by default, but give
users the option.

Patch and debugging from Christopher Allen Wing <wingc@engin.umich.edu>, with
minor tweaks (renamed the option and documented it)
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The test case at
http://cvs.sourceforge.net/viewcvs.py/posixtest/posixtestsuite/conforman
ce/interfaces/clock_nanosleep/1-5.c fails if it runs as a 32bit process on
x86_86 machines.

The root cause is the sub 32bit process fails to restart the syscall after it
is interrupted by a signal.

The syscall number of sys_restart_syscall in table sys_call_table is
__NR_restart_syscall (219) while it's __NR_ia32_restart_syscall
(0) in ia32_sys_call_table. When regs->rax==(unsigned
long)-ERESTART_RESTARTBLOCK, function do_signal doesn't distinguish if
the process is 64bit or 32bit, and always sets restart syscall number
as __NR_restart_syscall (219).
Signed-off-by: NZhang Yanmin <yanmin.zhang@intel.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

We need to hold the vmlist_lock while doing change_page_attr, otherwise we
could reset someone else's mapping.

Requires previous patch to add __remove_vm_area
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Caused oopses again.  Also fix potential mismatch in checking if
change_page_attr was needed.

To do it without races I needed to change mm/vmalloc.c to export a
__remove_vm_area that does not take vmlist lock.

Noticed by Terence Ripperda and based on a patch of his.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

There was a "off by one quad word" error in there.  I don't think it is
exploitable because it will only store into a unused area, but better to plug
it.

Found and fixed by John Blackwood
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

- Remove duplicated ifdef
- Make core_id match what Intel uses
- Initialize phys_proc_id correctly for non DC case
- Handle non power of two core numbers.

Fixes for both i386 and x86-64
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch removes the entwining of cpusets and hotplug code in the "No
more Mr.  Nice Guy" case of sched.c move_task_off_dead_cpu().

Since the hotplug code is holding a spinlock at this point, we cannot take
the cpuset semaphore, cpuset_sem, as would seem to be required either to
update the tasks cpuset, or to scan up the nested cpuset chain, looking for
the nearest cpuset ancestor that still has some CPUs that are online.  So
we just punt and blast the tasks cpus_allowed with all bits allowed.

This reverts these lines of code to what they were before the cpuset patch.
 And it updates the cpuset Doc file, to match.

The one known alternative to this that seems to work came from Dinakar
Guniguntala, and required the hotplug code to take the cpuset_sem semaphore
much earlier in its processing.  So far as we know, the increased locking
entanglement between cpusets and hot plug of this alternative approach is
not worth doing in this case.
Signed-off-by: NPaul Jackson <pj@sgi.com>
Acked-by: NNathan Lynch <ntl@pobox.com>
Acked-by: NDinakar Guniguntala <dino@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch fixed CONFIG_TASK_SIZE handling on 44x.  Currently head_44x.S
hardcodes 0x80000000, which breaks if user chooses to change TASK_SIZE
(e.g.  for 3G user-space).  Tested on Ocotea in 3G/1G configuration.
Signed-off-by: NEugene Surovegin <ebs@ebshome.net>
Signed-off-by: NMatt Porter <mporter@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Initialization of 8250 serial ports that are platform devices require that
at empty entry exists in the array of plat_serial8250_port.  With out an
empty entry we can get some pretty random behavior.
Signed-off-by: NKumar Gala <kumar.gala@freescale.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

From: Al Viro - we have error messages with KERN_ERR in them, so they
should be printk-ed rather than printf-ed.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

From: Al Viro - add three-level page table support to fixrange_init.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Finally rip out the ubd-mmap code, which turned out to be broken by design.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The serial UML OS-abstraction layer patch (um/kernel dir).

This moves all systemcalls from initrd_user.c file under os-Linux dir and join
initrd_user.c and initrd_kern.c files in new file initrd.c
Signed-off-by: NGennady Sharapov <Gennady.V.Sharapov@intel.com>
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

From: Oleg Drokin: This patch is needed to support kernel modules that want to
use clear_user() (that is exported symbol on all other architectures).
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Byte-swapping of the port and IP address passed in to the multicast driver by
the user used to happen in different places, which was a bug in itself.  The
port also was swapped before being printk-ed, which led to a misleading
message.  This patch moves the port swapping to the same place as the IP
address swapping.  It also cleans up the error paths of mcast_open.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch cleans up the delay implementations a bit, makes the loops
unoptimizable, and exports __udelay and __const_udelay.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Any access to a PROT_NONE page should segfault the process.  A JVM seems to do
this on purpose.  Also, Al noticed some bogus code, which is now deleted.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Some changes that I sent in didn't make 2.6.12-rc4 for some reason.  This
adds them back.  We have
	an x86_64 definition of TOP_ADDR
	a reimplementation of the x86_64 csum_partial_copy_from_user
	some syntax fixes in arch/um/kernel/ptrace.c
	removal of a CFLAGS definition in the x86_64 Makefile
	some include changes in the x86_64 ptrace.c and user-offsets.h
	a syntax fix in elf-x86_64.h
Also moved an include in the i386 and x86_64 Makefiles to make the symlinks
work, and some small fixes from Al Viro.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

If you tried to open a packet device first in read-only mode and then a
second time in read-write mode, the second open succeeded even though the
device was not correctly set up for writing.  If you then tried to write
data to the device, the writes would fail with I/O errors.

This patch prevents that problem by making the second open fail with
-EBUSY.
Signed-off-by: NPeter Osterlund <petero2@telia.com>
Cc: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The new period/dt setting routines don't get the coupling of these
parameters correct.  This means that Domain Validation never gets DT
set, and thus the drive gets restricted to U80.

Fix this by restoring the couplings in the set routines.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Tampering with the settings has to be done under the host lock ...
slave_alloc isn't called under any lock, so this has to be done
explicitly.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

The allocation of all of our components should be done in slave alloc.
Currently it's rather fancifully refcounted in the queuecommand
callback.  This patch moves allocation and destroy to their correct
places in slave_alloc/slave_destory.  Now we can guarantee that
everywhere a device is requested, it's actually been allocated, so don't
check for this anymore.

Additionally, the per device busy timer was the only source of potential
use after free.  It's been deleted because Linux does the correct thing
with busy returns, so there's no need to implement a separate timer in
the driver.

Finally, implement code that forces all the device parameters to zero
(i.e. async and narrow) in the slave alloc, inform the spi class of the
bios recorded maximums and wait until slave configure before trying
anything more adventurous.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This should finish the spurious queue removal from aic7xxx (there are
other queues that are probably unnecessary, but at least the major and
obviously unnecessary ones are done with).
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This was rendered obsolete by the busyq removal; remove some of the last
remnants of its presence.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

pci_alloc_consistent is under 4G by default.  Also simplify the
definition of bus_dmamap_t.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

There's not much sense in sharing code anymore now that aic7xxx uses
various transport class facilities.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

The aic7xxx driver has two spurious queues in it's linux glue code: the
busyq which queues incoming commands to the driver and the completeq
which queues finished commands before sending them back to the mid-layer

This patch just removes the busyq and makes the aic finally return the
correct status to get the mid-layer to manage its queueing, so a command
is either committed to the sequencer or returned to the midlayer for
requeue.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This is similar to the previous sym2 problem.  For Domain Validation to
work we can't allow any period setting to turn wide on if it was
previously off.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

There's a basic need not to have parameters go under or over certain
values when doing domain validation.  The basic ones are

max_offset, max_width and min_period

This patch makes the transport class take and enforce these three
limits.  Currently they can be set by the user, although they could
obviously be read from the HBA's on-board NVRAM area during
slave_configure (if it has one).
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Hopefully the addition of -E to my applypatch script
will mean that I won't have these kinds of leftovers
in the future.

The recent change to add a timeout to strbuf flushing had
a negative performance impact.  The udelay()'s are too long,
and they were done in the wrong order wrt. the register read
checks.  Fix both, and things are happy again.

There are more possible improvements in this area.  In fact,
PCI streaming buffer flushing seems to be part of the bottleneck
in network receive performance on my SunBlade1000 box.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for sysfs to the IPMI device interface.

Clean-ups based on Dimitry Torokovs comment by Philipp Hahn.
Signed-off-by: NCorey Minyard <minyard@acm.org>
Signed-off-by: NPhilipp Hahn <pmhahn@titan.lahn.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This fixes an uninitialized variable warning in arch/ppc/kernel/setup.c,
and this time gcc is actually right, there is a path that could result
in offset being uninitialized.  Zero is a sane default in this instance.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>