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* [PATCH] ixp4xxdefconfig arm fixesFrederik Deweerdt2006-10-06
| | | | | | | | With the following patch, the ixp4xxdefconfig builds correctly. I'll test some more configs if I get some time. Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
* IRQ: Typedef the IRQ handler function typeDavid Howells2006-10-05
| | | | | | | Typedef the IRQ handler function type. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1356d1e5fd256997e3d3dce0777ab787d0515c7a commit)
* IRQ: Typedef the IRQ flow handler function typeDavid Howells2006-10-05
| | | | | | | Typedef the IRQ flow handler function type. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 8e973fbdf5716b93a0a8c0365be33a31ca0fa351 commit)
* [PATCH] msi: simplify msi sanity checks by adding with generic irq codeEric W. Biederman2006-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently msi.c is doing sanity checks that make certain before an irq is destroyed it has no more users. By adding irq_has_action I can perform the test is a generic way, instead of relying on a msi specific data structure. By performing the core check in dynamic_irq_cleanup I ensure every user of dynamic irqs has a test present and we don't free resources that are in use. In msi.c this allows me to kill the attrib.state member of msi_desc and all of the assciated code to maintain it. To keep from freeing data structures when irq cleanup code is called to soon changing dyanamic_irq_cleanup is insufficient because there are msi specific data structures that are also not safe to free. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Tony Luck <tony.luck@intel.com> Cc: Andi Kleen <ak@suse.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Greg KH <greg@kroah.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: irq: add a dynamic irq creation APIEric W. Biederman2006-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the msi support comes a new concept in irq handling, irqs that are created dynamically at run time. Currently the msi code allocates irqs backwards. First it allocates a platform dependent routing value for an interrupt the ``vector'' and then it figures out from the vector which irq you are on. This msi backwards allocator suffers from two basic problems. The allocator suffers because it is trying to do something that is architecture specific in a generic way making it brittle, inflexible, and tied to tightly to the architecture implementation. The alloctor also suffers from it's very backwards nature as it has tied things together that should have no dependencies. To solve the basic dynamic irq allocation problem two new architecture specific functions are added: create_irq and destroy_irq. create_irq takes no input and returns an unused irq number, that won't be reused until it is returned to the free poll with destroy_irq. The irq then can be used for any purpose although the only initial consumer is the msi code. destroy_irq takes an irq number allocated with create_irq and returns it to the free pool. Making this functionality per architecture increases the simplicity of the irq allocation code and increases it's flexibility. dynamic_irq_init() and dynamic_irq_cleanup() are added to automate the irq_desc initializtion that should happen for dynamic irqs. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rajesh Shah <rajesh.shah@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: irq: add moved_masked_irqEric W. Biederman2006-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently move_native_irq disables and renables the irq we are migrating to ensure we don't take that irq when we are actually doing the migration operation. Disabling the irq needs to happen but sometimes doing the work is move_native_irq is too late. On x86 with ioapics the irq move sequences needs to be: edge_triggered: mask irq. move irq. unmask irq. ack irq. level_triggered: mask irq. ack irq. move irq. unmask irq. We can easily perform the edge triggered sequence, with the current defintion of move_native_irq. However the level triggered case does not map well. For that I have added move_masked_irq, to allow me to disable the irqs around both the ack and the move. Q: Why have we not seen this problem earlier? A: The only symptom I have been able to reproduce is that if we change the vector before acknowleding an irq the wrong irq is acknowledged. Since we currently are not reprogramming the irq vector during migration no problems show up. We have to mask the irq before we acknowledge the irq or else we could hit a window where an irq is asserted just before we acknowledge it. Edge triggered irqs do not have this problem because acknowledgements do not propogate in the same way. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rajesh Shah <rajesh.shah@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: irq: convert the move_irq flag from a 32bit word to a single bitEric W. Biederman2006-10-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The primary aim of this patchset is to remove maintenances problems caused by the irq infrastructure. The two big issues I address are an artificially small cap on the number of irqs, and that MSI assumes vector == irq. My primary focus is on x86_64 but I have touched other architectures where necessary to keep them from breaking. - To increase the number of irqs I modify the code to look at the (cpu, vector) pair instead of just looking at the vector. With a large number of irqs available systems with a large irq count no longer need to compress their irq numbers to fit. Removing a lot of brittle special cases. For acpi guys the result is that irq == gsi. - Addressing the fact that MSI assumes irq == vector takes a few more patches. But suffice it to say when I am done none of the generic irq code even knows what a vector is. In quick testing on a large Unisys x86_64 machine we stumbled over at least one driver that assumed that NR_IRQS could always fit into an 8 bit number. This driver is clearly buggy today. But this has become a class of bugs that it is now much easier to hit. This patch: This is a minor space optimization. In practice I don't think this has any affect because of our alignment constraints and the other fields but there is not point in chewing up an uncessary word and since we already read the flag field this should improve the cache hit ratio of the irq handler. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rajesh Shah <rajesh.shah@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] irq: remove a extra lineYoichi Yuasa2006-09-29
| | | | | | Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] irq: fixed coding styleYoichi Yuasa2006-09-29
| | | | | | Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] FRV: permit __do_IRQ() to be dispensed withDavid Howells2006-09-26
| | | | | | | | | | | Permit __do_IRQ() to be dispensed with based on a configuration option. Signed-off-by: David Howells <dhowells@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq core: fix handle_level_irq()Ingo Molnar2006-09-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | while porting the -rt tree to 2.6.18-rc7 i noticed the following screaming-IRQ scenario on an SMP system: 2274 0Dn.:1 0.001ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.010ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.020ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.029ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.039ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.048ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.058ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.068ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.077ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.087ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) 2274 0Dn.:1 0.097ms: do_IRQ+0xc/0x103 <= (ret_from_intr+0x0/0xf) as it turns out, the bug is caused by handle_level_irq(), which if it races with another CPU already handling this IRQ, it _unmasks_ the IRQ line on the way out. This is not how 2.6.17 works, and we introduced this bug in one of the early genirq cleanups right before it went into -mm. (the bug was not in the genirq patchset for a long time, and we didnt notice the bug due to the lack of -rt rebase to the new genirq code. -rt, and hardirq-preemption in particular opens up such races much wider than anything else.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: fix typo in IRQ resendImre Deak2006-09-16
| | | | | | | | | | | Fix a bug where the IRQ_PENDING flag is never cleared and the ISR is called endlessly without an actual interrupt. Signed-off-by: Imre Deak <imre.deak@solidboot.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kerneldoc for handle_bad_irq()Henrik Kretzschmar2006-09-01
| | | | | | | | Adds the description of the parameters from handle_bad_irq(). Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: {en,dis}able_irq_wake() need refcounting tooDavid Brownell2006-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | IRQs need refcounting and a state flag to track whether the the IRQ should be enabled or disabled as a "normal IRQ" source after a series of calls to {en,dis}able_irq(). For shared IRQs, the IRQ must be enabled so long as at least one driver needs it active. Likewise, IRQs need the same support to track whether the IRQ should be enabled or disabled as a "wakeup event" source after a series of calls to {en,dis}able_irq_wake(). For shared IRQs, the IRQ must be enabled as a wakeup source during sleep so long as at least one driver needs it. But right now they _don't have_ that refcounting ... which means sharing a wakeup-capable IRQ can't work correctly in some configurations. This patch adds the refcount and flag mechanisms to set_irq_wake() -- which is what {en,dis}able_irq_wake() call -- and minimal documentation of what the irq wake mechanism does. Drivers relying on the older (broken) "toggle" semantics will trigger a warning; that'll be a handful of drivers on ARM systems. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds2006-07-03
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: add defconfig for Freescale MPC8349E-mITX board powerpc: Add base support for the Freescale MPC8349E-mITX eval board Documentation: correct values in MPC8548E SEC example node [POWERPC] Actually copy over i8259.c to arch/ppc/syslib this time [POWERPC] Add new interrupt mapping core and change platforms to use it [POWERPC] Copy i8259 code back to arch/ppc [POWERPC] New device-tree interrupt parsing code [POWERPC] Use the genirq framework [PATCH] genirq: Allow fasteoi handler to retrigger disabled interrupts [POWERPC] Update the SWIM3 (powermac) floppy driver [POWERPC] Fix error handling in detecting legacy serial ports [POWERPC] Fix booting on Momentum "Apache" board (a Maple derivative) [POWERPC] Fix various offb and BootX-related issues [POWERPC] Add a default config for 32-bit CHRP machines [POWERPC] fix implicit declaration on cell. [POWERPC] change get_property to return void *
| * [PATCH] genirq: Allow fasteoi handler to retrigger disabled interruptsBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | | | | | Make the fasteoi handler mark disabled interrupts as pending if they happen anyway. This allow implementation of a delayed disable scheme with the fasteoi handler. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] lockdep: annotate enable_in_hardirq()Ingo Molnar2006-07-03
| | | | | | | | | | | | | | | | | | | | | | | | Make use of local_irq_enable_in_hardirq() API to annotate places that enable hardirqs in hardirq context. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] lockdep: annotate genirqIngo Molnar2006-07-03
| | | | | | | | | | | | | | | | | | | | Teach special (recursive) locking code to the lock validator. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] lockdep: coreIngo Molnar2006-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do 'make oldconfig' and accept all the defaults for new config options - reboot into the kernel and if everything goes well it should boot up fine and you should have /proc/lockdep and /proc/lockdep_stats files. Typically if the lock validator finds some problem it will print out voluminous debug output that begins with "BUG: ..." and which syslog output can be used by kernel developers to figure out the precise locking scenario. What does the lock validator do? It "observes" and maps all locking rules as they occur dynamically (as triggered by the kernel's natural use of spinlocks, rwlocks, mutexes and rwsems). Whenever the lock validator subsystem detects a new locking scenario, it validates this new rule against the existing set of rules. If this new rule is consistent with the existing set of rules then the new rule is added transparently and the kernel continues as normal. If the new rule could create a deadlock scenario then this condition is printed out. When determining validity of locking, all possible "deadlock scenarios" are considered: assuming arbitrary number of CPUs, arbitrary irq context and task context constellations, running arbitrary combinations of all the existing locking scenarios. In a typical system this means millions of separate scenarios. This is why we call it a "locking correctness" validator - for all rules that are observed the lock validator proves it with mathematical certainty that a deadlock could not occur (assuming that the lock validator implementation itself is correct and its internal data structures are not corrupted by some other kernel subsystem). [see more details and conditionals of this statement in include/linux/lockdep.h and Documentation/lockdep-design.txt] Furthermore, this "all possible scenarios" property of the validator also enables the finding of complex, highly unlikely multi-CPU multi-context races via single single-context rules, increasing the likelyhood of finding bugs drastically. In practical terms: the lock validator already found a bug in the upstream kernel that could only occur on systems with 3 or more CPUs, and which needed 3 very unlikely code sequences to occur at once on the 3 CPUs. That bug was found and reported on a single-CPU system (!). So in essence a race will be found "piecemail-wise", triggering all the necessary components for the race, without having to reproduce the race scenario itself! In its short existence the lock validator found and reported many bugs before they actually caused a real deadlock. To further increase the efficiency of the validator, the mapping is not per "lock instance", but per "lock-class". For example, all struct inode objects in the kernel have inode->inotify_mutex. If there are 10,000 inodes cached, then there are 10,000 lock objects. But ->inotify_mutex is a single "lock type", and all locking activities that occur against ->inotify_mutex are "unified" into this single lock-class. The advantage of the lock-class approach is that all historical ->inotify_mutex uses are mapped into a single (and as narrow as possible) set of locking rules - regardless of how many different tasks or inode structures it took to build this set of rules. The set of rules persist during the lifetime of the kernel. To see the rough magnitude of checking that the lock validator does, here's a portion of /proc/lockdep_stats, fresh after bootup: lock-classes: 694 [max: 2048] direct dependencies: 1598 [max: 8192] indirect dependencies: 17896 all direct dependencies: 16206 dependency chains: 1910 [max: 8192] in-hardirq chains: 17 in-softirq chains: 105 in-process chains: 1065 stack-trace entries: 38761 [max: 131072] combined max dependencies: 2033928 hardirq-safe locks: 24 hardirq-unsafe locks: 176 softirq-safe locks: 53 softirq-unsafe locks: 137 irq-safe locks: 59 irq-unsafe locks: 176 The lock validator has observed 1598 actual single-thread locking patterns, and has validated all possible 2033928 distinct locking scenarios. More details about the design of the lock validator can be found in Documentation/lockdep-design.txt, which can also found at: http://redhat.com/~mingo/lockdep-patches/lockdep-design.txt [bunk@stusta.de: cleanups] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] genirq:fixup missing SA_PERCPU replacementThomas Gleixner2006-07-02
| | | | | | | | | | | | | | | | The irqflags consolidation converted SA_PERCPU_IRQ to IRQF_PERCPU but did not define the new constant. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] genirq: ARM dyntick cleanupThomas Gleixner2006-07-02
|/ | | | | | | | | | Linus: "The hacks in kernel/irq/handle.c are really horrid. REALLY horrid." They are indeed. Move the dyntick quirks to ARM where they belong. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'genirq' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-07-02
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'genirq' of master.kernel.org:/home/rmk/linux-2.6-arm: (24 commits) [ARM] 3683/2: ARM: Convert at91rm9200 to generic irq handling [ARM] 3682/2: ARM: Convert ixp4xx to generic irq handling [ARM] 3702/1: ARM: Convert ixp23xx to generic irq handling [ARM] 3701/1: ARM: Convert plat-omap to generic irq handling [ARM] 3700/1: ARM: Convert lh7a40x to generic irq handling [ARM] 3699/1: ARM: Convert s3c2410 to generic irq handling [ARM] 3698/1: ARM: Convert sa1100 to generic irq handling [ARM] 3697/1: ARM: Convert shark to generic irq handling [ARM] 3696/1: ARM: Convert clps711x to generic irq handling [ARM] 3694/1: ARM: Convert ecard driver to generic irq handling [ARM] 3693/1: ARM: Convert omap1 to generic irq handling [ARM] 3691/1: ARM: Convert imx to generic irq handling [ARM] 3688/1: ARM: Convert clps7500 to generic irq handling [ARM] 3687/1: ARM: Convert integrator to generic irq handling [ARM] 3685/1: ARM: Convert pxa to generic irq handling [ARM] 3684/1: ARM: Convert l7200 to generic irq handling [ARM] 3681/1: ARM: Convert ixp2000 to generic irq handling [ARM] 3680/1: ARM: Convert footbridge to generic irq handling [ARM] 3695/1: ARM drivers/pcmcia: Fixup includes [ARM] 3689/1: ARM drivers/input/touchscreen: Fixup includes ... Manual conflict resolved in kernel/irq/handle.c (butt-ugly ARM tickless code).
| * [ARM] 3690/1: genirq: Introduce and make use of dummy irq chipThomas Gleixner2006-07-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Thomas Gleixner From: Thomas Gleixner <tglx@linutronix.de> ARM has a couple of really dumb interrupt controllers. Implement a generic one and fixup the ARM migration. ARM reused the no_irq_chip for this purpose, but this does not work out for platforms which are not converted to the new interrupt type handling model. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 3679/1: ARM: Make ARM dyntick implementation work with genirqThomas Gleixner2006-07-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Thomas Gleixner From: Thomas Gleixner <tglx@linutronix.de> Make the ARM dyntick implementation work with the generic irq code. This hopefully goes away once we consolidated the dyntick implementations. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [PATCH] irq-flags: generic irq: Use the new IRQF_ constantsThomas Gleixner2006-07-02
| | | | | | | | | | | | | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] IRQ: warning message cleanupBjorn Helgaas2006-07-01
| | | | | | | | | | | | | | | | | | | | Make warnings more consistent. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] IRQ: Use SA_PERCPU_IRQ, not IRQ_PER_CPU, for irqaction.flagsBjorn Helgaas2006-07-01
|/ | | | | | | | | | | | IRQ_PER_CPU is a bit in the struct irq_desc "status" field, not in the struct irqaction "flags", so the previous code checked the wrong bit. SA_PERCPU_IRQ is only used by drivers/char/mmtimer.c for SGI ia64 boxes. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] genirq: add chip->eoi(), fastack -> fasteoiIngo Molnar2006-06-29
| | | | | | | | | | | | | | Clean up the fastack concept by turning it into fasteoi and introducing the ->eoi() method for chips. This also allows the cleanup of an i386 EOI quirk - now the quirk is cleanly separated from the pure ACK implementation. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: fasteoi handler: handle interrupt disablingBenjamin Herrenschmidt2006-06-29
| | | | | | | | | | | Note when a disable interrupt happened with the fasteoi handler as well so that delayed disable can be implemented with fasteoi-type controllers. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: more verbose debugging on unexpected IRQ vectorsIngo Molnar2006-06-29
| | | | | | | | | | | One frequent sign of IRQ handling bugs is the appearance of unexpected vectors. Print out all the IRQ state in that case. We dont want this patch upstream, but it is useful during initial testing. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: cleanup: no_irq_type -> no_irq_chip renameIngo Molnar2006-06-29
| | | | | | | | Rename no_irq_type to no_irq_chip. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add SA_TRIGGER supportThomas Gleixner2006-06-29
| | | | | | | | | | Enable drivers to request an IRQ with a given irq-flow (trigger/polarity) setting. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add irq-wake (power-management) supportThomas Gleixner2006-06-29
| | | | | | | | | Enable platforms to set the irq-wake (power-management) properties of an IRQ. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add handle_bad_irq()Ingo Molnar2006-06-29
| | | | | | | | | Handle bad IRQ vectors via the irqchip mechanism. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add irq-chip supportThomas Gleixner2006-06-29
| | | | | | | | | | | | | Enable platforms to use the irq-chip and irq-flow abstractions: allow setting of the chip, the type and provide highlevel handlers for common irq-flows. [rostedt@goodmis.org: misroute-irq: Don't call desc->chip->end because of edge interrupts] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: coreThomas Gleixner2006-06-29
| | | | | | | | | Core genirq support: add the irq-chip and irq-flow abstractions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: update copyrightsIngo Molnar2006-06-29
| | | | | | | | | Update/add copyrights in the generic IRQ code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add IRQ_NOAUTOEN supportThomas Gleixner2006-06-29
| | | | | | | | | Enable platforms to disable the automatic enabling of freshly set up irqs. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add IRQ_NOREQUEST supportThomas Gleixner2006-06-29
| | | | | | | | | Enable platforms to disable request_irq() for certain interrupts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add IRQ_NOPROBE supportThomas Gleixner2006-06-29
| | | | | | | | | Introduce IRQ_NOPROBE: enables platforms to control chip-probing. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add genirq sw IRQ-retriggerThomas Gleixner2006-06-29
| | | | | | | | | | Enable platforms that do not have a hardware-assisted hardirq-resend mechanism to resend them via a softirq-driven IRQ emulation mechanism. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: cleanup: no_irq_type cleanupsIngo Molnar2006-06-29
| | | | | | | | | | Clean up no_irq_type: share the NOP functions where possible, and properly name the ack_bad() function. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: doc: handle_IRQ_event() and __do_IRQ() commentsIngo Molnar2006-06-29
| | | | | | | | | Document handle_IRQ_event() and __do_IRQ(). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend()Ingo Molnar2006-06-29
| | | | | | | | | | | | Add ->retrigger() irq op to consolidate hw_irq_resend() implementations. (Most architectures had it defined to NOP anyway.) NOTE: ia64 needs testing. i386 and x86_64 tested. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: debug: better debug printout in enable_irq()Thomas Gleixner2006-06-29
| | | | | | | | | Make enable_irq() debug printouts user-readable. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: cleanup: turn ARCH_HAS_IRQ_PER_CPU into CONFIG_IRQ_PER_CPUIngo Molnar2006-06-29
| | | | | | | | | Cleanup: change ARCH_HAS_IRQ_PER_CPU into a Kconfig method. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: cleanup: merge pending_irq_cpumask[] into irq_desc[]Ingo Molnar2006-06-29
| | | | | | | | | | Consolidation: remove the pending_irq_cpumask[NR_IRQS] array and move it into the irq_desc[NR_IRQS].pending_mask field. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: cleanup: merge irq_dir[], smp_affinity_entry[] into irq_desc[]Ingo Molnar2006-06-29
| | | | | | | | | | Consolidation: remove the irq_dir[NR_IRQS] and the smp_affinity_entry[NR_IRQS] arrays and move them into the irq_desc[] array. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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