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2018-03-20genirq: Cleanup top of file commentsThomas Gleixner
Remove pointless references to the file name itself and condense the information so it wastes less space. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Link: https://lkml.kernel.org/r/20180314212030.412095827@linutronix.de
2018-02-01genirq: Make legacy autoprobing work againThomas Gleixner
Meelis reported the following warning on a quad P3 HP NetServer museum piece: WARNING: CPU: 3 PID: 258 at kernel/irq/chip.c:244 __irq_startup+0x80/0x100 EIP: __irq_startup+0x80/0x100 irq_startup+0x7e/0x170 probe_irq_on+0x128/0x2b0 parport_irq_probe.constprop.18+0x8d/0x1af [parport_pc] parport_pc_probe_port+0xf11/0x1260 [parport_pc] parport_pc_init+0x78a/0xf10 [parport_pc] parport_parse_param.constprop.16+0xf0/0xf0 [parport_pc] do_one_initcall+0x45/0x1e0 This is caused by the rewrite of the irq activation/startup sequence which missed to convert a callsite in the irq legacy auto probing code. To fix this irq_activate_and_startup() needs to gain a return value so the pending logic can work proper. Fixes: c942cee46bba ("genirq: Separate activation and startup") Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Meelis Roos <mroos@linux.ee> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801301935410.1797@nanos
2017-11-13Merge branch 'irq-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq core updates from Thomas Gleixner: "A rather large update for the interrupt core code and the irq chip drivers: - Add a new bitmap matrix allocator and supporting changes, which is used to replace the x86 vector allocator which comes with separate pull request. This allows to replace the convoluted nested loop allocation function in x86 with a facility which supports the recently added property of managed interrupts proper and allows to switch to a best effort vector reservation scheme, which addresses problems with vector exhaustion. - A large update to the ARM GIC-V3-ITS driver adding support for range selectors. - New interrupt controllers: - Meson and Meson8 GPIO - BCM7271 L2 - Socionext EXIU If you expected that this will stop at some point, I have to disappoint you. There are new ones posted already. Sigh! - STM32 interrupt controller support for new platforms. - A pile of fixes, cleanups and updates to the MIPS GIC driver - The usual small fixes, cleanups and updates all over the place. Most visible one is to move the irq chip drivers Kconfig switches into a separate Kconfig menu" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) genirq: Fix type of shifting literal 1 in __setup_irq() irqdomain: Drop pointless NULL check in virq_debug_show_one genirq/proc: Return proper error code when irq_set_affinity() fails irq/work: Use llist_for_each_entry_safe irqchip: mips-gic: Print warning if inherited GIC base is used irqchip/mips-gic: Add pr_fmt and reword pr_* messages irqchip/stm32: Move the wakeup on interrupt mask irqchip/stm32: Fix initial values irqchip/stm32: Add stm32h7 support dt-bindings/interrupt-controllers: Add compatible string for stm32h7 irqchip/stm32: Add multi-bank management irqchip/stm32: Select GENERIC_IRQ_CHIP irqchip/exiu: Add support for Socionext Synquacer EXIU controller dt-bindings: Add description of Socionext EXIU interrupt controller irqchip/gic-v3-its: Fix VPE activate callback return value irqchip: mips-gic: Make IPI bitmaps static irqchip: mips-gic: Share register writes in gic_set_type() irqchip: mips-gic: Remove gic_vpes variable irqchip: mips-gic: Use num_possible_cpus() to reserve IPIs irqchip: mips-gic: Configure EIC when CPUs come online ...
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-25genirq: Separate activation and startupThomas Gleixner
Activation of an interrupt and startup are currently a combo functionlity. That works so far, but upcoming changes require a strict separation because the activation can fail in future. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Juergen Gross <jgross@suse.com> Tested-by: Yu Chen <yu.c.chen@intel.com> Acked-by: Juergen Gross <jgross@suse.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Alok Kataria <akataria@vmware.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Rui Zhang <rui.zhang@intel.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Len Brown <lenb@kernel.org> Link: https://lkml.kernel.org/r/20170913213152.754334077@linutronix.de
2017-06-22genirq: Add force argument to irq_startup()Thomas Gleixner
In order to handle managed interrupts gracefully on irq_startup() so they won't lose their assigned affinity, it's necessary to allow startups which keep the interrupts in managed shutdown state, if none of the assigend CPUs is online. This allows drivers to request interrupts w/o the CPUs being online, which avoid online/offline churn in drivers. Add a force argument which can override that decision and let only request_irq() and enable_irq() allow the managed shutdown handling. enable_irq() is required, because the interrupt might be requested with IRQF_NOAUTOEN and enable_irq() invokes irq_startup() which would then wreckage the assignment again. All other callers force startup and potentially break the assigned affinity. No functional change as this only adds the function argument. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Keith Busch <keith.busch@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20170619235447.112094565@linutronix.de
2012-02-15genirq: Handle pending irqs in irq_startup()Thomas Gleixner
An interrupt might be pending when irq_startup() is called, but the startup code does not invoke the resend logic. In some cases this prevents the device from issuing another interrupt which renders the device non functional. Call the resend function in irq_startup() to keep things going. Reported-and-tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: stable@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-03-29genirq: Remove compat codeThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Remove real old transition functionsThomas Gleixner
These transition helpers are stale for years now. Remove them. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Wrap the remaning IRQ_* flagsThomas Gleixner
Use wrappers to keep them away from the core code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_PENDING flag to coreThomas Gleixner
Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_REPLAY and IRQ_WAITING to coreThomas Gleixner
No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_AUTODETECT to internal stateThomas Gleixner
No users outside of core Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Consolidate startup/shutdown of interruptsThomas Gleixner
Aside of duplicated code some of the startup/shutdown sites do not handle the MASKED/DISABLED flags and the depth field at all. Move that to a helper function and take care of it there. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20110202212551.787481468@linutronix.de>
2010-10-04genirq: Provide compat handling for chip->set_type()Thomas Gleixner
Wrap the old chip function set_type() until the migration is complete and the old chip functions are removed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.832261548@linutronix.de> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Reviewed-by: Ingo Molnar <mingo@elte.hu>
2010-10-04genirq: Provide compat handling for chip->startup()Thomas Gleixner
Wrap the old chip function startup() until the migration is complete and the old chip functions are removed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.635152961@linutronix.de> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Reviewed-by: Ingo Molnar <mingo@elte.hu>
2010-10-04genirq: Provide compat handling for chip->disable()/shutdown()Thomas Gleixner
Wrap the old chip functions disable() and shutdown() until the migration is complete and the old chip functions are removed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20100927121842.532070631@linutronix.de> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Reviewed-by: Ingo Molnar <mingo@elte.hu>
2010-10-04genirq: Convert core code to irq_dataThomas Gleixner
Convert all references in the core code to orq, chip, handler_data, chip_data, msi_desc, affinity to irq_data.* Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
2009-12-14genirq: Convert irq_desc.lock to raw_spinlockThomas Gleixner
Convert locks which cannot be sleeping locks in preempt-rt to raw_spinlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
2009-01-07async: Asynchronous function calls to speed up kernel bootArjan van de Ven
Right now, most of the kernel boot is strictly synchronous, such that various hardware delays are done sequentially. In order to make the kernel boot faster, this patch introduces infrastructure to allow doing some of the initialization steps asynchronously, which will hide significant portions of the hardware delays in practice. In order to not change device order and other similar observables, this patch does NOT do full parallel initialization. Rather, it operates more in the way an out of order CPU does; the work may be done out of order and asynchronous, but the observable effects (instruction retiring for the CPU) are still done in the original sequence. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2008-12-26irq: simplify for_each_irq_desc() usageKOSAKI Motohiro
Impact: cleanup all for_each_irq_desc() usage point have !desc check. then its check can move into for_each_irq_desc() macro. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-08sparse irq_desc[] array: core kernel and x86 changesYinghai Lu
Impact: new feature Problem on distro kernels: irq_desc[NR_IRQS] takes megabytes of RAM with NR_CPUS set to large values. The goal is to be able to scale up to much larger NR_IRQS value without impacting the (important) common case. To solve this, we generalize irq_desc[NR_IRQS] to an (optional) array of irq_desc pointers. When CONFIG_SPARSE_IRQ=y is used, we use kzalloc_node to get irq_desc, this also makes the IRQ descriptors NUMA-local (to the site that calls request_irq()). This gets rid of the irq_cfg[] static array on x86 as well: irq_cfg now uses desc->chip_data for x86 to store irq_cfg. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16genirq: fix name space collision of nr_irqs in autoprobe.cThomas Gleixner
probe_irq_off() is disfunctional as the local nr_irqs is referenced instead of the global one for the for_each_irq_desc() iterator. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-10-16genirq: use iterators for irq_desc loopsThomas Gleixner
Use for_each_irq_desc[_reverse] for all the iteration loops. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-10-16irq: sparse irqs, fix IRQ auto-probe crashIngo Molnar
fix: [ 10.631533] calling yenta_socket_init+0x0/0x20 [ 10.631533] Yenta: CardBus bridge found at 0000:15:00.0 [17aa:2012] [ 10.631533] Yenta: Using INTVAL to route CSC interrupts to PCI [ 10.631533] Yenta: Routing CardBus interrupts to PCI [ 10.631533] Yenta TI: socket 0000:15:00.0, mfunc 0x01d01002, devctl 0x64 [ 10.731599] BUG: unable to handle kernel NULL pointer dereference at 00000040 [ 10.731838] IP: [<c0c95b5f>] _spin_lock_irq+0xf/0x20 [ 10.732221] *pde = 00000000 [ 10.732741] Oops: 0002 [#1] SMP [ 10.733453] [ 10.734253] Pid: 1, comm: swapper Tainted: G W (2.6.27-rc3-tip-00173-gd7eaa4f-dirty #1) [ 10.735188] EIP: 0060:[<c0c95b5f>] EFLAGS: 00010002 CPU: 0 [ 10.735523] EIP is at _spin_lock_irq+0xf/0x20 [ 10.735523] EAX: 00000040 EBX: 00000000 ECX: f6e04c90 EDX: 00000100 [ 10.735523] ESI: 000000df EDI: f6e04c90 EBP: f7867df0 ESP: f7867df0 [ 10.735523] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 10.735523] Process swapper (pid: 1, ti=f7867000 task=f7870000 task.ti=f7867000) [ 10.735523] Stack: f7867e04 c0155fbd 00000000 00000000 f6e04c90 f7867e5c c0c6e319 c0f6a074 [ 10.735523] f6e04c90 000017aa 00002012 c112b648 f791f240 c112b5e0 f7867e44 c010440b [ 10.735523] f791f240 f791f29c c112b8ec f791f240 00000000 f7867e5c c048f893 03c0b648 [ 10.735523] Call Trace: [ 10.735523] [<c0155fbd>] ? probe_irq_on+0x3d/0x140 [ 10.735523] [<c0c6e319>] ? yenta_probe+0x529/0x640 [ 10.735523] [<c010440b>] ? mcount_call+0x5/0xa [ 10.735523] [<c048f893>] ? pci_match_device+0xa3/0xb0 [ 10.735523] [<c048fc1e>] ? pci_device_probe+0x5e/0x80 [ 10.735523] [<c0515423>] ? driver_probe_device+0x83/0x180 [ 10.735523] [<c0515594>] ? __driver_attach+0x74/0x80 [ 10.735523] [<c0514b69>] ? bus_for_each_dev+0x49/0x70 [ 10.735523] [<c051528e>] ? driver_attach+0x1e/0x20 [ 10.735523] [<c0515520>] ? __driver_attach+0x0/0x80 [ 10.735523] [<c05150d3>] ? bus_add_driver+0x1a3/0x220 [ 10.735523] [<c048fb60>] ? pci_device_remove+0x0/0x40 [ 10.735523] [<c05157f4>] ? driver_register+0x54/0x130 [ 10.735523] [<c048fe2f>] ? __pci_register_driver+0x4f/0x90 [ 10.735523] [<c11e9419>] ? yenta_socket_init+0x19/0x20 [ 10.735523] [<c0101125>] ? do_one_initcall+0x35/0x160 [ 10.735523] [<c11e9400>] ? yenta_socket_init+0x0/0x20 [ 10.735523] [<c01391a6>] ? __queue_work+0x36/0x50 [ 10.735523] [<c013922d>] ? queue_work_on+0x3d/0x50 [ 10.735523] [<c11a2758>] ? kernel_init+0x148/0x210 [ 10.735523] [<c11a2610>] ? kernel_init+0x0/0x210 [ 10.735523] [<c01043f3>] ? kernel_thread_helper+0x7/0x10 [ 10.735523] ======================= [ 10.735523] Code: 10 38 f2 74 06 f3 90 8a 10 eb f6 5d 89 c8 c3 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 e8 a4 e8 46 ff fa ba 00 01 00 00 90 <66> 0f c1 10 38 f2 74 06 f3 90 8a 10 eb f6 5d c3 90 55 89 e5 53 as auto-probing wants to iterate over existing irqs. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16generic: sparse irqs: use irq_desc() together with dyn_array, instead of ↵Yinghai Lu
irq_desc[] add CONFIG_HAVE_SPARSE_IRQ to for use condensed array. Get rid of irq_desc[] array assumptions. Preallocate 32 irq_desc, and irq_desc() will try to get more. ( No change in functionality is expected anywhere, except the odd build failure where we missed a code site or where a crossing commit itroduces new irq_desc[] usage. ) v2: according to Eric, change get_irq_desc() to irq_desc() Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16irq: introduce nr_irqsYinghai Lu
at this point nr_irqs is equal NR_IRQS convert a few easy users from NR_IRQS to dynamic nr_irqs. v2: according to Eric, we need to take care of arch without generic_hardirqs Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2006-06-29[PATCH] genirq: add handle_bad_irq()Ingo Molnar
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>
2006-06-29[PATCH] genirq: coreThomas Gleixner
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>
2006-06-29[PATCH] genirq: add IRQ_NOPROBE supportThomas Gleixner
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>
2006-06-29[PATCH] genirq: cleanup: reduce irq_desc_t use, mark it obsoleteIngo Molnar
Cleanup: remove irq_desc_t use from the generic IRQ code, and mark it obsolete. 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>
2006-06-29[PATCH] genirq: cleanup: misc code cleanupsIngo Molnar
Assorted code cleanups to 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>
2006-06-29[PATCH] genirq: sem2mutex probe_sem -> probing_activeIngo Molnar
Convert the irq auto-probing semaphore to a mutex. (This allows us to find probing API usage bugs sooner, via the mutex debugging 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>
2006-06-29[PATCH] genirq: rename desc->handler to desc->chipIngo Molnar
This patch-queue improves the generic IRQ layer to be truly generic, by adding various abstractions and features to it, without impacting existing functionality. While the queue can be best described as "fix and improve everything in the generic IRQ layer that we could think of", and thus it consists of many smaller features and lots of cleanups, the one feature that stands out most is the new 'irq chip' abstraction. The irq-chip abstraction is about describing and coding and IRQ controller driver by mapping its raw hardware capabilities [and quirks, if needed] in a straightforward way, without having to think about "IRQ flow" (level/edge/etc.) type of details. This stands in contrast with the current 'irq-type' model of genirq architectures, which 'mixes' raw hardware capabilities with 'flow' details. The patchset supports both types of irq controller designs at once, and converts i386 and x86_64 to the new irq-chip design. As a bonus side-effect of the irq-chip approach, chained interrupt controllers (master/slave PIC constructs, etc.) are now supported by design as well. The end result of this patchset intends to be simpler architecture-level code and more consolidation between architectures. We reused many bits of code and many concepts from Russell King's ARM IRQ layer, the merging of which was one of the motivations for this patchset. This patch: rename desc->handler to desc->chip. Originally i did not want to do this, because it's a big patch. But having both "desc->handler", "desc->handle_irq" and "action->handler" caused a large degree of confusion and made the code appear alot less clean than it truly is. I have also attempted a dual approach as well by introducing a desc->chip alias - but that just wasnt robust enough and broke frequently. So lets get over with this quickly. The conversion was done automatically via scripts and converts all the code in the kernel. This renaming patch is the first one amongst the patches, so that the remaining patches can stay flexible and can be merged and split up without having some big monolithic patch act as a merge barrier. [akpm@osdl.org: build fix] [akpm@osdl.org: another build fix] 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>
2005-06-28[PATCH] Using msleep() instead of HZLuca Falavigna
Use msleep() in a few places. Signed-off-by: Luca Falavigna <dktrkranz@gmail.com> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!