Hi Chris, On Tue, Oct 24, 2017 at 11:33:46AM -0500, Chris Caudle wrote: > I recently began helping someone test a new multimedia driver (network > audio) and found that the driver would not compile on my machine running > an RT kernel because the driver used tasklet_hrtimer_init(), but that > function is not defined in interrupt.h in the RT patched kernel. /me eyes include/linux/interupt.h and kernel/softirq.c and finds tasklet_hrtimer_init(). It is marked EXPORT_SYMBOL_GPL() though, so if you do not export the modules as GPL, it won't resolve that symbol. If this is not the case, please provide which kernel-version and PREEMPT-RT patch version you are using. A .config would probably also be helpful. > What should be used in place of that, and where should be look for > documentation describing any differences that need to be accomodated? Using tasklets is somewhat frowned upon -have you tried using a kernelthread instead? (You can adjust priority and set affinity for threads) -Henrik
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