Is below code race free?
void process_context_function(void)
{
/* interrupts enabled here */
spin_lock(&lock);
modify_critical_section_list();
spin_unlock(&lock);
}
irqreturn_t a2091_intr (int irq, void *_instance)
{
if(spin_trylock(&lock)) {
modify_critical_section_list();
spin_unlock(&lock);
}
else {
/* skip */
}
return IRQ_HANDLED;
}
More specifically, can spin_lock & spin_trylock have race?
Regards
Lal
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