* Rafael J. Wysocki <rjw@xxxxxxx> wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > > Sysdev have to be suspended and resumed with interrupts disabled > and things usually break in a way that's difficult to debug if one > of sysdev drivers enables interrupts by mistake during suspend or > resume. Add extra checks that will generate warnings in such > cases. no objections - but obviously the real solution would be to finish PeterZ's "detect assymetric kernel functions" patch: That patch (Peter posted an initial version of it already on lkml) works the following way: the ftrace function-graph-tracer plugin is utilized to instrument every function call in the kernel. That is extended with the following check: every function except __lockfunc and __sched functions must be 'balanced' - i.e. they must enter and exit with the same IRQ flags, preempt count and lock depth counter. Ingo _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
