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Because the return value of cpu_timer_sample_group() is not checked, compilers and static checkers can legitimately warn about a potential use of the uninitialized variable 'now'. This is not a runtime issue as all call sites hand in valid clock ids. Also cpu_timer_sample_group() is invoked unconditionally even when the result is not used because *oldval is NULL. Make the invocation conditional and check the return value. [ tglx: Massage changelog ] Signed-off-by: Max R. P. Grossmann <m@max.pm> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john.stultz@linaro.org Link: https://lkml.kernel.org/r/20180108190157.10048-1-m@max.pm |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.