Fix bugs for unlikely edge cases noticed by Douglas Gilbert:

- When READ(6)/WRITE(6) sector count == 0, treat it as 256 sectors

- For other READ(x)/WRITE(x), when sector count == 0, error.
  We don't support successfully completing zero-length transfers at
  this time.

Needed for a few PATA drivers.

Also fix up a wrong comment.
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

You spelt heuristic wrongly. Also reformatted to 80 columns,
ignore the diff and fix the typo if you prefer that.
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Wrap ata_qc_complete() calls in EH context in spinlocks, to prevent
races (mainly in ATAPI code paths).

Too many changes to release a final 2.6.13.

As pointed out in the following thread, the CLOCK_TICK_RATE setting for
IXP4xx is incorrect b/c the HW ignores the lowest 2 bits of the LATCH
value.

   http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2005-August/030950.html

Tnx to George Anziger and Egil Hjelmeland for finding the issue.
Signed-off-by: NDeepak Saxena <dsaxena@plexity.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This keeps the kernel/cpuset.c routine update_cpu_domains() from
invoking the sched.c routine partition_sched_domains() if the cpuset in
question doesn't fall on node boundaries.

I have boot tested this on an SN2, and with the help of a couple of ad
hoc printk's, determined that it does indeed avoid calling the
partition_sched_domains() routine on partial nodes.

I did not directly verify that this avoids setting up bogus sched
domains or avoids the oops that Hawkes saw.

This patch imposes a silent artificial constraint on which cpusets can
be used to define dynamic sched domains.

This patch should allow proceeding with this new feature in 2.6.13 for
the configurations in which it is useful (node alligned sched domains)
while avoiding trying to setup sched domains in the less useful cases
that can cause the kernel corruption and oops.
Signed-off-by: NPaul Jackson <pj@sgi.com>
Acked-by: NIngo Molnar <mingo@elte.hu>
Acked-by: NDinakar Guniguntala <dino@in.ibm.com>
Acked-by: NJohn Hawkes <hawkes@sgi.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The code to detect IO links on Opteron would not check
if the node had actually memory. This could lead to pci_bus_to_node
returning an invalid node, which might cause crashes later
when dma_alloc_coherent passes it to page_alloc_node().

The bug has been there forever but for some reason
it is causing now crashes.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

There's a "return the wrong SKB" error in the GL620A cable minidriver
(for "usbnet") which can oops.  This would not appear when talking
Linux-to-Linux, only Linux-to-Windows (for recent Linuxes).
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

i386 floating-point exception handling has a bug that can cause error
code 0 to be sent instead of the proper code during signal delivery.

This is caused by unconditionally checking the IS and c1 bits from the
FPU status word when they are not always relevant.  The IS bit tells
whether an exception is a stack fault and is only relevant when the
exception is IE (invalid operation.) The C1 bit determines whether a
stack fault is overflow or underflow and is only relevant when IS and IE
are set.
Signed-off-by: NChuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

remove the bogus games with explicit ifdefs on __CHECKER__
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

handling of %t... (ptrdiff_t) in vsnprintf
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

ac97_plugin_ad1980 should trigger build of ac97_codec
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

non-modular scsi drivers depend on built-in scsi
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

a bunch of PCI-only drivers didn't have the right dependency
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

missing exports on m32r
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

a bunch of functions switched from volatile to __attribute__((noreturn)) and
from const to __attribute_pure__
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

dumb typo: u32 volatile * mistyped as u32 * volatile
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

netpoll is void(struct net_device *), not int(struct net_device *)
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

removes an extern for a static variable.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

use of explicit labels in inline asm is a Bad Idea(tm), since gcc can
decide to inline the function in several places.  Fixed by use of 1f/f:
instead of .Lfitsin/.Lfitsin:
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

extern declaration followed by static in drivers/serial/m32r_sio.c
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

either icu_data declaration for SMP case should be taken out of m32102.h,
or its declarations for m32700ut and opsput should not be static for SMP.
Patch does the latter - judging by comments in m32102.h it is intended to
be non-static.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

extern on physid_2_cpu[] does not belong in smp.h - the thing is static.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

"=m" (lock->lock) / "1" (lock->lock) makes gcc4 unhappy; fixed by s/1/m/,
same as in case of i386 rwsem.h where such variant had been accepted
by both Linus and rth.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

alpha xchg has to be a macro - alpha disables always_inline and if that
puppy does not get inlined, we immediately blow up on undefined reference.
Happens even on gcc3; with gcc4 that happens a _lot_.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

missing include of asm/irq.h
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

on UP smp_call_function() is expanded to expression.  Alpha oprofile
calls that puppy and ignores the return value.  And has -Werror for
arch/*...
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

since sparc32 Kconfig includes drivers/char/Kconfig (instead of duplicating
its parts) we need several new dependencies there to exclude the stuff
broken on sparc32 and not excluded by existing dependencies.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

emac doesn't build modular; ibm_emac_debug doesn't build at all (missing
headers).
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

CONFIG_PM is broken on 44x; removed duplicate entry for CONFIG_PM, made
the inclusion of generic one conditional on BROKEN || !44x.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

a bunch of ppc 4xx variants unconditionally calls early_serial_setup() and
therefore needs SERIAL_8250
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

MV64360 does not support IRQ_ALL_CPUS - see arch/ppc/kernel/mv64360_pic.c.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

ppc SMP is supported only for 6xx/POWER3/POWER4 - i.e. ones that have
PPC_STD_MMU.  Dependency fixed.
Signed-off-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Acked-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>