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This reverts commit 06f45435d985d60d7d2fe2424fbb9909d177a63d. John Ogness reports the case that the allocation is in atomic context under acquired spin-lock. [ 12.555784] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:306 [ 12.555808] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 70, name: kworker/1:2 [ 12.555814] preempt_count: 1, expected: 0 [ 12.555820] INFO: lockdep is turned off. [ 12.555824] irq event stamp: 208 [ 12.555828] hardirqs last enabled at (207): [<c00000000111e414>] ._raw_spin_unlock_irq+0x44/0x80 [ 12.555850] hardirqs last disabled at (208): [<c00000000110ff94>] .__schedule+0x854/0xfe0 [ 12.555859] softirqs last enabled at (188): [<c000000000f73504>] .addrconf_verify_rtnl+0x2c4/0xb70 [ 12.555872] softirqs last disabled at (182): [<c000000000f732b0>] .addrconf_verify_rtnl+0x70/0xb70 [ 12.555884] CPU: 1 PID: 70 Comm: kworker/1:2 Tainted: G S 6.6.0-rc1 #1 [ 12.555893] Hardware name: PowerMac7,2 PPC970 0x390202 PowerMac [ 12.555898] Workqueue: firewire_ohci .bus_reset_work [firewire_ohci] [ 12.555939] Call Trace: [ 12.555944] [c000000009677830] [c0000000010d83c0] .dump_stack_lvl+0x8c/0xd0 (unreliable) [ 12.555963] [c0000000096778b0] [c000000000140270] .__might_resched+0x320/0x340 [ 12.555978] [c000000009677940] [c000000000497600] .__kmem_cache_alloc_node+0x390/0x460 [ 12.555993] [c000000009677a10] [c0000000003fe620] .__kmalloc+0x70/0x310 [ 12.556007] [c000000009677ac0] [c0003d00004e2268] .fw_core_handle_bus_reset+0x2c8/0xba0 [firewire_core] [ 12.556060] [c000000009677c20] [c0003d0000491190] .bus_reset_work+0x330/0x9b0 [firewire_ohci] [ 12.556079] [c000000009677d10] [c00000000011d0d0] .process_one_work+0x280/0x6f0 [ 12.556094] [c000000009677e10] [c00000000011d8a0] .worker_thread+0x360/0x500 [ 12.556107] [c000000009677ef0] [c00000000012e3b4] .kthread+0x154/0x160 [ 12.556120] [c000000009677f90] [c00000000000bfa8] .start_kernel_thread+0x10/0x14 Cc: stable@kernel.org Reported-by: John Ogness <john.ogness@linutronix.de> Link: https://lore.kernel.org/lkml/87jzsuv1xk.fsf@jogness.linutronix.de/raw Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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.