49688e654e
The argument passed to xas_set_err() to indicate an error should be negative. Otherwise, xas_error() will return 0, and grab_mapping_entry() will return the found entry instead of 'SIGBUS' when the entry is not in fact valid. This would result in problems in subsequent code paths. Link: https://lore.kernel.org/r/20200729034436.24267-1-lihao2018.fnst@cn.fujitsu.com Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: Hao Li <lihao2018.fnst@cn.fujitsu.com> Signed-off-by: Vishal Verma <vishal.l.verma@intel.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 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.