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68ea1b2c33
The i2c-i801 driver invokes i2c_handle_smbus_host_notify() from his interrupt service routine. On PREEMPT_RT i2c-i801's handler is forced threaded with enabled interrupts which leads to a warning by handle_irq_event_percpu() assuming that irq_default_primary_handler() enabled interrupts. i2c-i801's interrupt handler can't be made non-threaded because the interrupt line is shared with other devices. Use generic_handle_irq_safe() which can invoked with disabled and enabled interrupts. Reported-by: Michael Below <below@judiz.de> Link: https://bugs.debian.org/1002537 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Oleksandr Natalenko <oleksandr@natalenko.name> Signed-off-by: Wolfram Sang <wsa@kernel.org>
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.