linux.git/arch, branch v2.6.31

powerpc: Fix i8259 interrupt driver kernel crash on ML510

2009-09-05T21:58:07+00:00

This patch fixes a null pointer exception caused by removal of
'ack()' for level interrupts in the Xilinx interrupt driver.  A recent
change to the xilinx interrupt controller removed the ack hook for
level irqs.

Signed-off-by: Roderick Colenbrander 
Signed-off-by: Grant Likely 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Linus Torvalds

Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

2009-09-05T21:50:53+00:00

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] fix csum_ipv6_magic()
  [IA64] Fix warning in dma-mapping.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

2009-09-05T20:49:06+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Fix bootup with mcount in some configs.
  sparc64: Kill spurious NMI watchdog triggers by increasing limit to 30 seconds.

Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-05T20:48:37+00:00

* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf_counter/powerpc: Fix cache event codes for POWER7
  perf_counter: Fix /0 bug in swcounters
  perf_counters: Increase paranoia level

sparc64: Fix bootup with mcount in some configs.

2009-09-04T10:39:45+00:00

Functions invoked early when booting up a cpu can't use
tracing because mcount requires a valid 'current_thread_info()'
and TLB mappings to be setup.

The code path of sun4v_register_mondo_queues --> register_one_mondo
is one such case.  sun4v_register_mondo_queues already has the
necessary 'notrace' annotation, but register_one_mondo does not.

Normally register_one_mondo is inlined so the bug doesn't trigger,
but with some config/compiler combinations, it won't be so we
must properly mark it notrace.

While we're here, add 'notrace' annoations to prom_printf and
prom_halt so that early error handling won't have the same problem.

Reported-by: Alexander Beregalov 
Reported-by: Leif Sawyer 
Signed-off-by: David S. Miller

sparc64: Kill spurious NMI watchdog triggers by increasing limit to 30 seconds.

2009-09-03T09:35:20+00:00

This is a compromise and a temporary workaround for bootup NMI
watchdog triggers some people see with qla2xxx devices present.

This happens when, for example:

CPU 0 is in the driver init and looping submitting mailbox commands to
load the firmware, then waiting for completion.

CPU 1 is receiving the device interrupts.  CPU 1 is where the NMI
watchdog triggers.

CPU 0 is submitting mailbox commands fast enough that by the time CPU
1 returns from the device interrupt handler, a new one is pending.
This sequence runs for more than 5 seconds.

The problematic case is CPU 1's timer interrupt running when the
barrage of device interrupts begin.  Then we have:

	timer interrupt
	return for softirq checking
	pending, thus enable interrupts

		 qla2xxx interrupt
		 return
		 qla2xxx interrupt
		 return
		 ... 5+ seconds pass
		 final qla2xxx interrupt for fw load
		 return

	run timer softirq
	return

At some point in the multi-second qla2xxx interrupt storm we trigger
the NMI watchdog on CPU 1 from the NMI interrupt handler.

The timer softirq, once we get back to running it, is smart enough to
run the timer work enough times to make up for the missed timer
interrupts.

However, the NMI watchdogs (both x86 and sparc) use the timer
interrupt count to notice the cpu is wedged.  But in the above
scenerio we'll receive only one such timer interrupt even if we last
all the way back to running the timer softirq.

The default watchdog trigger point is only 5 seconds, which is pretty
low (the softwatchdog triggers at 60 seconds).  So increase it to 30
seconds for now.

Signed-off-by: David S. Miller

perf_counter/powerpc: Fix cache event codes for POWER7

2009-09-03T06:41:53+00:00

I had the codes for L1 D-cache load accesses and misses swapped
around, and the wrong codes for LL-cache accesses and misses.
This corrects them.

Reported-by: Corey Ashford 
Signed-off-by: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: 
LKML-Reference: <19103.8514.709300.585484@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar

[IA64] fix csum_ipv6_magic()

2009-09-02T16:14:48+00:00

The 32-bit parameters (len and csum) of csum_ipv6_magic() are passed in 64-bit
registers in2 and in4. The high order 32 bits of the registers were never
cleared, and garbage was sometimes calculated into the checksum.

Fix this by clearing the high order 32 bits of these registers.

Signed-off-by: Jiri Bohac 
Signed-off-by: Tony Luck

[IA64] Fix warning in dma-mapping.c

2009-09-02T16:12:21+00:00

arch/ia64/kernel/dma-mapping.c:14: warning: control reaches end of non-void function
arch/ia64/kernel/dma-mapping.c:14: warning: no return statement in function returning non-void

This warning was introduced by commit: 390bd132b2831a2ad0268e84bffbfc0680debfe5
	Add dma_debug_init() for ia64

Signed-off-by: Tony Luck

parisc: fix warning in traps.c

2009-08-29T05:37:20+00:00

On Tue, Aug 18, 2009 at 01:45:17PM -0400, John David Anglin wrote:
>  CC      arch/parisc/kernel/traps.o
> arch/parisc/kernel/traps.c: In function 'handle_interruption':
> arch/parisc/kernel/traps.c:535:18: warning: operation on 'regs->iasq[0]'
> may be undefined

Yes - Line 535 should use both [0] and [1].

Reported-by: John David Anglin 
Signed-off-by: Grant Grundler 
Signed-off-by: Kyle McMartin 
Signed-off-by: Linus Torvalds