FYI, we noticed the below changes on

https://git.linaro.org/people/dlezcano/linux cpuidle-eas-next
commit 81d9b525eaa4660e5bddf661b9e994e9f4455007 ("Store the next prediction for an irq")


+----------------------------------------------------------------+------------+------------+
|                                                                | edd311df5d | 81d9b525ea |
+----------------------------------------------------------------+------------+------------+
| boot_successes                                                 | 20         | 10         |
| early-boot-hang                                                | 1          |            |
| boot_failures                                                  | 0          | 10         |
| BUG:sleeping_function_called_from_invalid_context_at_mm/slub.c | 0          | 10         |
| backtrace:ata_pci_sff_activate_host                            | 0          | 10         |
| backtrace:piix_init_one                                        | 0          | 10         |
| backtrace:__pci_register_driver                                | 0          | 10         |
| backtrace:piix_init                                            | 0          | 10         |
| backtrace:load_module                                          | 0          | 10         |
| backtrace:SyS_finit_module                                     | 0          | 10         |
+----------------------------------------------------------------+------------+------------+


[    6.298810] ata_piix 0000:00:01.1: version 2.13
[    6.306231] Registered IRQ14 for timing measurements
[    6.307575] irqt: registered IRQ14
[    6.308518] BUG: sleeping function called from invalid context at mm/slub.c:1240
[    6.308518] in_atomic(): 1, irqs_disabled(): 1, pid: 244, name: modprobe
[    6.308518] CPU: 1 PID: 244 Comm: modprobe Not tainted 3.18.0-g43473c9 #1
[    6.308518] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    6.308518]  ffff88003f483c80 ffff88003f45f888 ffffffff8188fff9 0000000000001f9a
[    6.308518]  000000000000000e ffff88003f45f898 ffffffff810963ca ffff88003f45f8e8
[    6.308518]  ffffffff811c1da7 ffffffff810d09ec 0000000000000018 ffff880037c2e000
[    6.308518] Call Trace:
[    6.308518]  [<ffffffff8188fff9>] dump_stack+0x4e/0x68
[    6.308518]  [<ffffffff810963ca>] __might_sleep+0xda/0x110
[    6.308518]  [<ffffffff811c1da7>] kmem_cache_alloc_trace+0x47/0x210
[    6.308518]  [<ffffffff810d09ec>] ? irqt_register+0x3c/0x70
[    6.308518]  [<ffffffff810d09ec>] irqt_register+0x3c/0x70
[    6.308518]  [<ffffffff810cc08c>] __setup_irq+0x47c/0x650
[    6.308518]  [<ffffffff810cc385>] ? request_threaded_irq+0x85/0x190
[    6.308518]  [<ffffffffa00a0c50>] ? ata_bmdma_port_intr+0x110/0x110 [libata]
[    6.308518]  [<ffffffff810cc3cf>] request_threaded_irq+0xcf/0x190
[    6.308518]  [<ffffffffa00a0c50>] ? ata_bmdma_port_intr+0x110/0x110 [libata]
[    6.308518]  [<ffffffff810ce28f>] devm_request_threaded_irq+0x5f/0xc0
[    6.308518]  [<ffffffffa00a0c50>] ? ata_bmdma_port_intr+0x110/0x110 [libata]
[    6.308518]  [<ffffffffa009f575>] ata_pci_sff_activate_host+0x115/0x230 [libata]
[    6.308518]  [<ffffffffa0065115>] piix_init_one+0x7c5/0x9cb [ata_piix]
[    6.308518]  [<ffffffff8143d235>] local_pci_probe+0x45/0xa0
[    6.308518]  [<ffffffff8143e5a5>] ? pci_match_device+0xe5/0x110
[    6.308518]  [<ffffffff8143e6e1>] pci_device_probe+0xd1/0x120
[    6.308518]  [<ffffffff8152be30>] driver_probe_device+0x90/0x3e0
[    6.308518]  [<ffffffff8152c25b>] __driver_attach+0x9b/0xa0
[    6.308518]  [<ffffffff8152c1c0>] ? __device_attach+0x40/0x40
[    6.308518]  [<ffffffff81529c3b>] bus_for_each_dev+0x6b/0xb0
[    6.308518]  [<ffffffff8152b8ae>] driver_attach+0x1e/0x20
[    6.308518]  [<ffffffff8152b490>] bus_add_driver+0x180/0x250
[    6.308518]  [<ffffffffa00fb000>] ? 0xffffffffa00fb000
[    6.308518]  [<ffffffff8152ca64>] driver_register+0x64/0xf0
[    6.308518]  [<ffffffff8143ca8c>] __pci_register_driver+0x4c/0x50
[    6.308518]  [<ffffffffa00fb01e>] piix_init+0x1e/0x1000 [ata_piix]
[    6.308518]  [<ffffffff81002130>] do_one_initcall+0xc0/0x1f0
[    6.308518]  [<ffffffff811a4fb2>] ? __vunmap+0xa2/0x100
[    6.308518]  [<ffffffff810f6f51>] load_module+0x15c1/0x1a60
[    6.308518]  [<ffffffff810f28e0>] ? store_uevent+0x40/0x40
[    6.308518]  [<ffffffff810f7596>] SyS_finit_module+0x86/0xb0
[    6.308518]  [<ffffffff818987a9>] system_call_fastpath+0x12/0x17
[    6.376765] scsi host0: Virtio SCSI HBA
[    6.382032] Registered IRQ15 for timing measurements
[    6.383454] irqt: registered IRQ15



Thanks,
Huang, Ying