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ba87297200
__fatal_error routine doesn't check strerror_r() return value, which results in the following compile time warning: posix_timers.c: In function ‘__fatal_error’: posix_timers.c:31:9: warning: ignoring return value of ‘strerror_r’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 31 | strerror_r(errno, buf, sizeof(buf)); Fix this by adding a check for return value and error handling appropriate for the GNU-specific strerror_r() in use in __fatal_error(). Check if return string is null and handle accordingly. From Linux strerror_r() manual page: "The GNU-specific strerror_r() returns a pointer to a string containing the error message. This may be either a pointer to a string that the function stores in buf, or a pointer to some (immutable) static string (in which case buf is unused). If the function stores a string in buf, then at most buflen bytes are stored (the string may be truncated if buflen is too small and errnum is unknown). The string always includes a terminating null byte." Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Acked-by: John Stultz <jstultz@google.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Shuah Khan <skhan@linuxfoundation.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 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.