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The use of WDOG_HW_RUNNING is currently inconsistent: If set by the driver, it will remain set until the watchdog device is opened and then closed. If set by the watchdog core, it is only set if the watchdog can not be stopped when closed. Subsequenty it is always only set while the watchdog is closed and the hardware watchdog is running. This is both misleading and inconsistent: The API states that watchdog_hw_running() indicates that the hardware watchdog is running. This is currently not always the case. Set WDOG_HW_RUNNING whenever a watchdog is successfully started for consistent behavior and to accurately report its status. This means that we no longer have to check for both watchdog_active() and watchdog_hw_running() to check if the watchdog is running because watchdog_hw_running() now implies watchdog_active(). Simplify the code accordingly where warranted. Cc: Wang Wensheng <wangwensheng4@huawei.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20230304161607.1418952-1-linux@roeck-us.net Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> |
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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.
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.