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f861f59671
The following lockdep error was reported when unloading the lpfc driver: INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. ... Call Trace: dump_stack+0x96/0xe0 register_lock_class+0x8b8/0x8c0 ? lockdep_hardirqs_on+0x190/0x280 ? is_dynamic_key+0x150/0x150 ? wait_for_completion_interruptible+0x2a0/0x2a0 ? wake_up_q+0xd0/0xd0 __lock_acquire+0xda/0x21a0 ? register_lock_class+0x8c0/0x8c0 ? synchronize_rcu_expedited+0x500/0x500 ? __call_rcu+0x850/0x850 lock_acquire+0xf3/0x1f0 ? del_timer_sync+0x5/0xb0 del_timer_sync+0x3c/0xb0 ? del_timer_sync+0x5/0xb0 lpfc_pci_remove_one.cold.102+0x8b7/0x935 [lpfc] ... Unloading the driver resulted in a call to del_timer_sync for the cpuhp_poll_timer. However the call to setup the timer had never been made, so the timer structures used by lockdep checking were not initialized. Unconditionally call setup_timer for the cpuhp_poll_timer during driver initialization. Calls to start the timer remain "as needed". Link: https://lore.kernel.org/r/20200322181304.37655-3-jsmart2021@gmail.com Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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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.