Merge "FROMGIT: arm64: fix oops in concurrently setting insn_emulation sysctls"

static LIST_HEAD(insn_emulation);

static int nr_insn_emulated __initdata;

static DEFINE_RAW_SPINLOCK(insn_emulation_lock);

static DEFINE_MUTEX(insn_emulation_mutex);

static void register_emulation_hooks(struct insn_emulation_ops *ops)

{

				  loff_t *ppos)

{

	int ret = 0;

	struct insn_emulation *insn = (struct insn_emulation *) table->data;

	struct insn_emulation *insn = container_of(table->data, struct insn_emulation, current_mode);

	enum insn_emulation_mode prev_mode = insn->current_mode;

	table->data = &insn->current_mode;

	mutex_lock(&insn_emulation_mutex);

	ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);

	if (ret || !write || prev_mode == insn->current_mode)

		update_insn_emulation_mode(insn, INSN_UNDEF);

	}

ret:

	table->data = insn;

	mutex_unlock(&insn_emulation_mutex);

	return ret;

}

		sysctl->maxlen = sizeof(int);

		sysctl->procname = insn->ops->name;

		sysctl->data = insn;

		sysctl->data = &insn->current_mode;

		sysctl->extra1 = &insn->min;

		sysctl->extra2 = &insn->max;

		sysctl->proc_handler = emulation_proc_handler;