linux.git/kernel/irq, branch v3.0-rc1

irq: Remove smp_affinity_list when unregister irq proc

2011-05-26T11:15:28+00:00

commit 4b06042(bitmap, irq: add smp_affinity_list interface to
/proc/irq) causes the following warning:

[  274.239500] WARNING: at fs/proc/generic.c:850 remove_proc_entry+0x24c/0x27a()
[  274.251761] remove_proc_entry: removing non-empty directory 'irq/184',
    	       leaking at least 'smp_affinity_list'

Remove the new file in the exit path.

Signed-off-by: Yinghai Lu 
Cc: Mike Travis 
Link: http://lkml.kernel.org/r/4DDDE094.6050505@kernel.org
Signed-off-by: Thomas Gleixner

bitmap, irq: add smp_affinity_list interface to /proc/irq

2011-05-25T15:39:45+00:00

Manually adjusting the smp_affinity for IRQ's becomes unwieldy when the
cpu count is large.

Setting smp affinity to cpus 256 to 263 would be:

	echo 000000ff,00000000,00000000,00000000,00000000,00000000,00000000,00000000 > smp_affinity

instead of:

	echo 256-263 > smp_affinity_list

Think about what it looks like for cpus around say, 4088 to 4095.

We already have many alternate "list" interfaces:

/sys/devices/system/cpu/cpuX/indexY/shared_cpu_list
/sys/devices/system/cpu/cpuX/topology/thread_siblings_list
/sys/devices/system/cpu/cpuX/topology/core_siblings_list
/sys/devices/system/node/nodeX/cpulist
/sys/devices/pci***/***/local_cpulist

Add a companion interface, smp_affinity_list to use cpu lists instead of
cpu maps.  This conforms to other companion interfaces where both a map
and a list interface exists.

This required adding a bitmap_parselist_user() function in a manner
similar to the bitmap_parse_user() function.

[akpm@linux-foundation.org: make __bitmap_parselist() static]
Signed-off-by: Mike Travis 
Cc: Thomas Gleixner 
Cc: Jack Steiner 
Cc: Lee Schermerhorn 
Cc: Andy Shevchenko 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

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

2011-05-20T00:30:15+00:00

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  irq: Export functions to allow modular irq drivers
  genirq: Uninline and sanity check generic_handle_irq()
  genirq: Remove pointless ifdefs
  genirq: Make generic irq chip depend on CONFIG_GENERIC_IRQ_CHIP
  genirq: Add chip suspend and resume callbacks
  genirq: Implement a generic interrupt chip
  genirq: Support per-IRQ thread disabling.
  genirq: irq_desc: Document preflow_handler and affinity_hint
  genirq: Update DocBook comments
  genirq: Forgotten updates/deletions after removal of compat code

irq: Export functions to allow modular irq drivers

2011-05-18T12:59:08+00:00

Export handle_simple_irq, irq_modify_status, irq_alloc_descs,
irq_free_descs and generic_handle_irq to allow their usage in
modules. First user is IIO, which wants to be built modular, but needs
to be able to create irq chips, allocate and configure interrupt
descriptors and handle demultiplexing interrupts.

[ tglx: Moved the uninlinig of generic_handle_irq to a separate patch ]

Signed-off-by: Jonathan Cameron 
Link: http://lkml.kernel.org/r/%3C1305711544-505-1-git-send-email-jic23%40cam.ac.uk%3E
Signed-off-by: Thomas Gleixner

genirq: Uninline and sanity check generic_handle_irq()

2011-05-18T12:59:08+00:00

generic_handle_irq() is missing a NULL pointer check for the result of
irq_to_desc. This was a not a big problem, but we want to expose it to
drivers, so we better have sanity checks in place. Add a return value
as well, which indicates that the irq number was valid and the handler
was invoked.

Based on the pure code move from Jonathan Cameron.

Signed-off-by: Thomas Gleixner 
Cc: Jonathan Cameron

genirq: Remove pointless ifdefs

2011-05-18T12:59:07+00:00

kernel/irq/ is only built when CONFIG_GENERIC_HARDIRQS=y. So making
code inside of kernel/irq/ conditional on CONFIG_GENERIC_HARDIRQS is
pointless.

Signed-off-by: Thomas Gleixner

genirq: Fix typo CONFIG_GENIRC_IRQ_SHOW_LEVEL

2011-05-02T19:16:37+00:00

commit ab7798ffcf98b11a9525cf65bacdae3fd58d357f ("genirq: Expand generic
show_interrupts()") added the Kconfig option GENERIC_IRQ_SHOW_LEVEL to
accomodate PowerPC, but this doesn't actually enable the functionality due
to a typo in the #ifdef check.

Signed-off-by: Geert Uytterhoeven 
Cc: Linux/PPC Development 
Link: http://lkml.kernel.org/r/%3Calpine.DEB.2.00.1104302251370.19068%40ayla.of.borg%3E
Signed-off-by: Thomas Gleixner

genirq: Make generic irq chip depend on CONFIG_GENERIC_IRQ_CHIP

2011-05-02T16:16:22+00:00

Only compile it in when there are users.

Signed-off-by: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org

genirq: Add chip suspend and resume callbacks

2011-04-23T13:56:24+00:00

These callbacks are only called in the syscore suspend/resume code on
interrupt chips which have been registered via the generic irq chip
mechanism. Calling those callbacks per irq would be rather icky, but
with the generic irq chip mechanism we can call this per registered
chip.

Signed-off-by: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org

genirq: Implement a generic interrupt chip

2011-04-23T13:56:24+00:00

Implement a generic interrupt chip, which is configurable and is able
to handle the most common irq chip implementations.

Signed-off-by: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org
Tested-by: H Hartley Sweeten 
Tested-by: Tony Lindgren 
Tested-by; Kevin Hilman