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Julien Grall authored
The update to timer->base is protected by the base->cpu_base->lock(). However, hrtimer_cancel_wait_running() does access it lockless. So the compiler is allowed to refetch timer->base which can cause havoc when the timer base is changed concurrently. Use READ_ONCE() to prevent this. [ tglx: Adapted from a RT patch ] Signed-off-by:
Julien Grall <julien.grall@arm.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190821092409.13225-2-julien.grall@arm.com
dd2261ed