posix-cpu-timers: Respect INFINITY for hard RTTIME limit
The RTIME limit expiry code does not check the hard RTTIME limit for INFINITY, i.e. being disabled. Add it. While this could be considered an ABI breakage if something would depend on this behaviour. Though it's highly unlikely to have an effect because RLIM_INFINITY is at minimum INT_MAX and the RTTIME limit is in seconds, so the timer would fire after ~68 years. Adding this obvious correct limit check also allows further consolidation of that code and is a prerequisite for cleaning up the 0 based checks and the rlimit setter code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lkml.kernel.org/r/20190821192922.078293002@linutronix.de
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@ -921,7 +921,7 @@ static void check_process_timers(struct task_struct *tsk,
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unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU);
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unsigned long psecs = div_u64(ptime, NSEC_PER_SEC);
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if (psecs >= hard) {
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if (hard != RLIM_INFINITY && psecs >= hard) {
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/*
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* At the hard limit, we just die.
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* No need to calculate anything else now.
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