kernel/linux.git/include/linux/interrupt.h, branch linux-2.6.22.y

Add hard_irq_disable()

2007-05-11T15:29:34+00:00

Some architectures, like powerpc, implement lazy disabling of interrupts. That means that on those, local_irq_disable() doesn't actually disable interrupts on the CPU, but only sets some per CPU flag which cause them to be disabled only if an interrupt actually occurs. However, in some cases, such as stop_machine, we really want interrupts to be fully disabled. For example, I have code using stop machine to do ECC error injection, used to verify operations of the ECC hardware, that sort of thing. It really needs to make sure that nothing is actually writing to memory while the injection happens. Similar examples can be found in other low level bits and pieces. This patch implements a generic hard_irq_disable() function which is meant to be called -after- local_irq_disable() and ensures that interrupts are fully disabled on that CPU. The default implementation is a nop, though powerpc does already provide an appropriate one. Signed-off-by: Benjamin Herrenschmidt Cc: Rusty Russell Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Add IRQF_IRQPOLL flag (common code)

2007-05-08T18:15:22+00:00

irqpoll is broken on some architectures that don't use the IRQ 0 for the timer interrupt like IA64. This patch adds a IRQF_IRQPOLL flag. Each architecture is handled in a separate pach. As I left the irq == 0 as condition, this should not break existing architectures that use timer_irq == 0 and that I did't address with that patch (because I don't know). This patch: This patch adds a IRQF_IRQPOLL flag that the interrupt registration code could use for the interrupt it wants to use for IRQ polling. Because this must not be the timer interrupt, an additional flag was added instead of re-using the IRQF_TIMER constant. Until all architectures will have an IRQF_IRQPOLL interrupt, irq == 0 will stay as alternative as it should not break anything. Also, note_interrupt() is called on CPU-specific interrupts to be used as interrupt source for IRQ polling. Signed-off-by: Bernhard Walle Cc: Russell King Cc: Kyle McMartin Cc: Matthew Wilcox Cc: Grant Grundler Cc: Paul Mundt Cc: "Luck, Tony" Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Deprecate SA_xxx interrupt flags -V2

2007-05-08T18:15:08+00:00

The deprecation of the SA_xxx interrupt flags did not emit deprecated warnings. Andrew said about the removal of the deprecated flag defines: > This is going to break a lot of external stuff. We should have found > a way to make usage of SA_* emit deprecated warnings (or _some_ > warning) to warn people of impending doom. But I can't immediately > find a way of doing that. if we _can_ find a way of doing this, I > suspect we'll need to do it, and give people another six months. It's > going to get ugly out there. We shall see... Define the deprecated flags as a call to a __deprecated inline function so a warning is emitted on compile time. Extend the reprieve of out of tree drivers to 9/2007. Signed-off-by: Thomas Gleixner Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

IRQ: add __must_check to request_irq

2007-05-08T18:15:00+00:00

This could help to find buggy drivers where request_irq return value wasn't checked. There's just no reason to ignore errors which can and do occur. Anyone who got warning during compilation have to realise what it is't realy safe code. Signed-off-by: Monakhov Dmitriy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lockdep: Add missing disable/enable irq variant

2007-05-05T00:59:06+00:00

Add missing disable/enable irq variant Signed-off-by: Roman Zippel Signed-off-by: Geert Uytterhoeven Signed-off-by: Linus Torvalds

[PATCH] Declare init_irq_proc before we use it.

2007-02-19T22:21:50+00:00

powerpc gets: init/main.c: In function `do_basic_setup': init/main.c:714: warning: implicit declaration of function `init_irq_proc' but we cannot include linux/irq.h in generic code. Fix it by moving the declaration into linux/interrupt.h instead. And make sure all code that defines init_irq_proc() is including linux/interrupt.h. And nuke an ifdef-in-C Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] hrtimers: add high resolution timer support

2007-02-16T16:13:59+00:00

Implement high resolution timers on top of the hrtimers infrastructure and the clockevents / tick-management framework. This provides accurate timers for all hrtimer subsystem users. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Cc: john stultz Cc: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Add irq flag to disable balancing for an interrupt

2007-02-16T16:13:56+00:00

Add a flag so we can prevent the irq balancing of an interrupt. Move the bits, so we have room for more :) Necessary for the ability to setup clocksources more flexible (e.g. use the different HPET channels per CPU) Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Cc: john stultz Cc: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

devres: device resource management

2007-02-09T22:39:36+00:00

Implement device resource management, in short, devres. A device driver can allocate arbirary size of devres data which is associated with a release function. On driver detach, release function is invoked on the devres data, then, devres data is freed. devreses are typed by associated release functions. Some devreses are better represented by single instance of the type while others need multiple instances sharing the same release function. Both usages are supported. devreses can be grouped using devres group such that a device driver can easily release acquired resources halfway through initialization or selectively release resources (e.g. resources for port 1 out of 4 ports). This patch adds devres core including documentation and the following managed interfaces. * alloc/free : devm_kzalloc(), devm_kzfree() * IO region : devm_request_region(), devm_release_region() * IRQ : devm_request_irq(), devm_free_irq() * DMA : dmam_alloc_coherent(), dmam_free_coherent(), dmam_declare_coherent_memory(), dmam_pool_create(), dmam_pool_destroy() * PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed() * iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(), devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(), pcim_iomap(), pcim_iounmap() Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik

[PATCH] sched: use softirq for load balancing

2006-12-10T17:55:42+00:00

Call rebalance_tick (renamed to run_rebalance_domains) from a newly introduced softirq. We calculate the earliest time for each layer of sched domains to be rescanned (this is the rescan time for idle) and use the earliest of those to schedule the softirq via a new field "next_balance" added to struct rq. Signed-off-by: Christoph Lameter Cc: Peter Williams Cc: Nick Piggin Cc: Christoph Lameter Cc: "Siddha, Suresh B" Cc: "Chen, Kenneth W" Acked-by: Ingo Molnar Cc: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds