static int __sbi_send_ipi_v02()

in kernel/sbi.c [215:257]

• 38 lines of code
• 9 McCabe index (conditional complexity)

static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
{
	unsigned long hartid, hmask_val, hbase;
	struct cpumask tmask;
	struct sbiret ret = {0};
	int result;

	if (!hart_mask || !(*hart_mask)) {
		riscv_cpuid_to_hartid_mask(cpu_online_mask, &tmask);
		hart_mask = cpumask_bits(&tmask);
	}

	hmask_val = 0;
	hbase = 0;
	for_each_set_bit(hartid, hart_mask, NR_CPUS) {
		if (hmask_val && ((hbase + BITS_PER_LONG) <= hartid)) {
			ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI,
					hmask_val, hbase, 0, 0, 0, 0);
			if (ret.error)
				goto ecall_failed;
			hmask_val = 0;
			hbase = 0;
		}
		if (!hmask_val)
			hbase = hartid;
		hmask_val |= 1UL << (hartid - hbase);
	}

	if (hmask_val) {
		ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI,
				hmask_val, hbase, 0, 0, 0, 0);
		if (ret.error)
			goto ecall_failed;
	}

	return 0;

ecall_failed:
	result = sbi_err_map_linux_errno(ret.error);
	pr_err("%s: hbase = [%lu] hmask = [0x%lx] failed (error [%d])\n",
	       __func__, hbase, hmask_val, result);
	return result;
}