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f187b6974f
Replace inline function PTR_ERR_OR_ZERO with IS_ERR and PTR_ERR to remove redundant parameter definitions and checks. Reduce code size. Before: text data bss dec hex filename 47510 5979 840 54329 d439 kernel/workqueue.o After: text data bss dec hex filename 47474 5979 840 54293 d415 kernel/workqueue.o Signed-off-by: Sean Fu <fxinrong@gmail.com> Signed-off-by: Tejun Heo <tj@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.