Commit 9ec9f9cf authored by Qi Liu's avatar Qi Liu Committed by Will Deacon
Browse files

drivers/perf: convert sysfs scnprintf family to sysfs_emit_at() and sysfs_emit() 



Use the generic sysfs_emit_at() and sysfs_emit() function to take place
of scnprintf()

Signed-off-by: default avatarQi Liu <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1616148273-16374-3-git-send-email-liuqi115@huawei.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 700a9cf0

drivers/perf/arm-ccn.c

+11 −16
Original line number Diff line number Diff line
@@ -326,43 +326,38 @@ static ssize_t arm_ccn_pmu_event_show(struct device *dev, 
	struct arm_ccn *ccn = pmu_to_arm_ccn(dev_get_drvdata(dev));

	struct arm_ccn_pmu_event *event = container_of(attr,

			struct arm_ccn_pmu_event, attr);

	ssize_t res;

	int res;



	res = scnprintf(buf, PAGE_SIZE, "type=0x%x", event->type);

	res = sysfs_emit(buf, "type=0x%x", event->type);

	if (event->event)

		res += scnprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",

				event->event);

		res += sysfs_emit_at(buf, res, ",event=0x%x", event->event);

	if (event->def)

		res += scnprintf(buf + res, PAGE_SIZE - res, ",%s",

				event->def);

		res += sysfs_emit_at(buf, res, ",%s", event->def);

	if (event->mask)

		res += scnprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",

				event->mask);

		res += sysfs_emit_at(buf, res, ",mask=0x%x", event->mask);



	/* Arguments required by an event */

	switch (event->type) {

	case CCN_TYPE_CYCLES:

		break;

	case CCN_TYPE_XP:

		res += scnprintf(buf + res, PAGE_SIZE - res,

				",xp=?,vc=?");

		res += sysfs_emit_at(buf, res, ",xp=?,vc=?");

		if (event->event == CCN_EVENT_WATCHPOINT)

			res += scnprintf(buf + res, PAGE_SIZE - res,

			res += sysfs_emit_at(buf, res,

					",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");

		else

			res += scnprintf(buf + res, PAGE_SIZE - res,

					",bus=?");

			res += sysfs_emit_at(buf, res, ",bus=?");



		break;

	case CCN_TYPE_MN:

		res += scnprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);

		res += sysfs_emit_at(buf, res, ",node=%d", ccn->mn_id);

		break;

	default:

		res += scnprintf(buf + res, PAGE_SIZE - res, ",node=?");

		res += sysfs_emit_at(buf, res, ",node=?");

		break;

	}



	res += scnprintf(buf + res, PAGE_SIZE - res, "\n");

	res += sysfs_emit_at(buf, res, "\n");



	return res;

}