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36c2cf8880
Add a new if_not_guard() macro to cleanup.h for handling conditional guards such as mutext_trylock(). This is more ergonomic than scoped_guard() for most use cases. Instead of hiding the error handling statement in the macro args, it works like a normal if statement and allow the error path to be indented while the normal code flow path is not indented. And it avoid unwanted side-effect from hidden for loop in scoped_guard(). Signed-off-by: David Lechner <dlechner@baylibre.com> Co-developed-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com> Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Link: https://lkml.kernel.org/r/20241001-cleanup-if_not_cond_guard-v1-1-7753810b0f7a@baylibre.com
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 reStructuredText 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.