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99fbc70f85
Allocate the IRQ descriptors where necessary before configuring them via irq_set_chip_and_handler(). Fixes the following soft lockup: watchdog: BUG: soft lockup - CPU#5 stuck for 22s! [modprobe:72] Modules linked in: irq event stamp: 33288 hardirqs last enabled at (33287): [<ffffffff8012e680>] restore_partial+0x74/0x150 hardirqs last disabled at (33288): [<ffffffff8012e9e8>] handle_int+0x128/0x178 softirqs last enabled at (33284): [<ffffffff80859c4c>] __do_softirq+0x5c4/0x6d0 softirqs last disabled at (33279): [<ffffffff80164018>] irq_exit+0xe8/0xf0 CPU: 5 PID: 72 Comm: modprobe Not tainted 4.19.80-... #1 $ 0 : 0000000000000000 0000000000000001 0000000000000003 8000000002bdc640 $ 4 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 $ 8 : 0000000000000001 0000000000000001 0000000000000000 ffffffff803076cc $12 : 0000000000000000 0000000000000000 ffffffff817f0000 0000000008000000 $16 : ffffffff80a96d10 ffffffff80a90000 8000000002c41780 8000000002c41788 $20 : 0000000000000001 ffffffff8013b248 800000008ef28080 ffffffff80bb8700 $24 : 0000000003bf0000 ffffffff802d0610 $28 : 800000008ef20000 800000008ef23bd0 0000000000000006 ffffffff8020d6f8 Hi : 0000000000000160 Lo : 0000000000000014 epc : ffffffff8020d72c smp_call_function_many+0x2f4/0x370 ra : ffffffff8020d6f8 smp_call_function_many+0x2c0/0x370 Status: 10008ce3 KX SX UX KERNEL EXL IE Cause : 40808000 (ExcCode 00) PrId : 000d900a (Cavium Octeon II) CPU: 5 PID: 72 Comm: modprobe Not tainted 4.19.80-... #1 Stack : ffffffff80ab0000 00000051801c0da0 0000000010000ce0 5e70a8a65518aeac 5e70a8a65518aeac 0000000000000000 800000008e0cfb48 ffffffff81820000 800000008e0cfad4 00000000f0ce6f64 0000000000000001 0000000000000000 ffffffff801ccfb8 0000000000000000 0000000000000000 ffffffff817f0000 800000008531d840 ffffffff80a90000 fffe000000000000 0000000000000000 ffffffff80b20000 ffffffffffffffff ffffffff80bb3980 ffffffff80bb3980 ffffffff80a90000 00000000fffffffe ffffffff8057a760 0000000000000028 ffffffff80c50028 800000008ef20000 800000008e0cfb40 ffffffff80b20000 ffffffff80835d6c 0000000000000000 800000008e0cfc78 5e70a8a65518aeac ffffffff80a9dbf7 ffffffff80835c2c ffffffff801357a4 ffffffff809bdd50 ... Call Trace: [<ffffffff801357a4>] show_stack+0x9c/0x130 [<ffffffff80835d6c>] dump_stack+0xdc/0x140 [<ffffffff8023d490>] watchdog_timer_fn+0x3e8/0x478 [<ffffffff801f43e4>] __hrtimer_run_queues+0x18c/0x6d8 [<ffffffff801f507c>] hrtimer_interrupt+0x104/0x2e8 [<ffffffff801391a8>] c0_compare_interrupt+0x60/0x90 [<ffffffff801d0fcc>] __handle_irq_event_percpu+0xb4/0x4a0 [<ffffffff801d13ec>] handle_irq_event_percpu+0x34/0x90 [<ffffffff801d6b24>] handle_percpu_irq+0x9c/0xe0 [<ffffffff801d01f4>] generic_handle_irq+0x34/0x50 [<ffffffff80859678>] do_IRQ+0x18/0x28 [<ffffffff80107548>] plat_irq_dispatch+0x90/0x128 [<ffffffff8012ea2c>] handle_int+0x16c/0x178 [<ffffffff8020d72c>] smp_call_function_many+0x2f4/0x370 [<ffffffff8020d7e8>] smp_call_function+0x40/0xa0 [<ffffffff8013bc1c>] flush_tlb_mm+0x44/0x140 [<ffffffff802d50b0>] tlb_flush_mmu+0x38/0x90 [<ffffffff802d5154>] arch_tlb_finish_mmu+0x4c/0x88 [<ffffffff802d52bc>] tlb_finish_mmu+0x24/0x50 [<ffffffff802e0c54>] exit_mmap+0x11c/0x1b8 [<ffffffff80157bb4>] mmput+0x84/0x138 [<ffffffff80160ad4>] do_exit+0x314/0xc88 [<ffffffff801628e0>] do_group_exit+0x48/0xb0 [<ffffffff80162958>] __wake_up_parent+0x0/0x18 Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.