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| Filename | Latest commit message | Latest commit date |
|---|---|---|
56f0ddadce
ide_timer_expiry() disables interrupt at function entry when acquiring hwif->lock. Before disabling the device interrupt it unlocks hwif->lock, but interrupts stay disabled. After the call to disable_irq() interrupts are disabled again, which is a pointless exercise. After the device irq handler has been invoked with interrupts disabled, hwif->lock is acquired again with spin_lock_irq() because the device irq handler might have reenabled interrupts. This is not documented and confusing for the casual reader. Remove the redundant local_irq_disable() and add a comment which explains why hwif->lock has to be reacquired with spin_lock_irq(). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| README | ||
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.