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fb94109b76
If a hwspinlock is defined in device tree use it to protect configuration registers. Do not request for hwspinlock during the exti driver init since the hwspinlock driver is not probed yet at that stage and the exti driver does not support deferred probe. Instead of this, postpone the hwspinlock request at the first time the hwspinlock is actually needed. Use the hwspin_trylock_raw() API which is the most appropriated here Indeed: - hwspin_lock_() calls are under spin_lock protection (chip_data->rlock or gc->lock). - the _timeout() API relies on jiffies count which won't work if IRQs are disabled which is the case here (a large part of the IRQ setup is done atomically (see irq/manage.c)) As a consequence implement the retry/timeout lock from here. And since all of this is done atomically, reduce the timeout delay to 1 ms. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.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.