Merge branch 'next/tlb-opt' into for-next

#include <linux/mm.h>

#include <linux/smp.h>

#include <linux/sched.h>

#include <asm/sbi.h>

void flush_tlb_all(void)

	sbi_remote_sfence_vma(NULL, 0, -1);

}

/*

 * This function must not be called with cmask being null.

 * Kernel may panic if cmask is NULL.

 */

static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,

				  unsigned long size)

{

	struct cpumask hmask;

	unsigned int cpuid;

	if (cpumask_empty(cmask))

		return;

	cpuid = get_cpu();

	if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) {

		/* local cpu is the only cpu present in cpumask */

		if (size <= PAGE_SIZE)

			local_flush_tlb_page(start);

		else

			local_flush_tlb_all();

	} else {

		riscv_cpuid_to_hartid_mask(cmask, &hmask);

	sbi_remote_sfence_vma(hmask.bits, start, size);

		sbi_remote_sfence_vma(cpumask_bits(&hmask), start, size);

	}

	put_cpu();

}

void flush_tlb_mm(struct mm_struct *mm)