void flush_icache_mm_range()

in abiv2/cacheflush.c [51:88]

• 25 lines of code
• 4 McCabe index (conditional complexity)

void flush_icache_mm_range(struct mm_struct *mm,
		unsigned long start, unsigned long end)
{
	unsigned int cpu;
	cpumask_t others, *mask;

	preempt_disable();

#ifdef CONFIG_CPU_HAS_ICACHE_INS
	if (mm == current->mm) {
		icache_inv_range(start, end);
		preempt_enable();
		return;
	}
#endif

	/* Mark every hart's icache as needing a flush for this MM. */
	mask = &mm->context.icache_stale_mask;
	cpumask_setall(mask);

	/* Flush this hart's I$ now, and mark it as flushed. */
	cpu = smp_processor_id();
	cpumask_clear_cpu(cpu, mask);
	local_icache_inv_all(NULL);

	/*
	 * Flush the I$ of other harts concurrently executing, and mark them as
	 * flushed.
	 */
	cpumask_andnot(&others, mm_cpumask(mm), cpumask_of(cpu));

	if (mm != current->active_mm || !cpumask_empty(&others)) {
		on_each_cpu_mask(&others, local_icache_inv_all, NULL, 1);
		cpumask_clear(mask);
	}

	preempt_enable();
}