Commit 49a0f287 authored by Vincenzo Mezzela's avatar Vincenzo Mezzela Committed by Eingesch
Browse files

drivers: arch_topology: Refactor do-while loops 

mainline inclusion
from mainline-v6.10-rc2
commit 97b1974547c517d8b5cba1fa0cc7213399ff0d2c
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IBBU4K
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97b1974547c517d8b5cba1fa0cc7213399ff0d2c



----------------------------------------------------------------------

Refactor do-while loops to move break condition within the loop's scope.
This modification is in preparation to move the declaration of the
device_node directly within the loop and take advantage of the automatic
cleanup feature provided by the __free(device_node) attribute.

Acked-by: default avatarSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: default avatarVincenzo Mezzela <vincenzo.mezzela@gmail.com>
Link: https://lore.kernel.org/r/20240607163350.392971-2-vincenzo.mezzela@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarHongye Lin <linhongye@h-partners.com>
parent 6a6a6975

drivers/base/arch_topology.c

+55 −52
Original line number Diff line number Diff line
@@ -527,7 +527,9 @@ static int __init parse_core(struct device_node *core, int package_id, 
	do {

		snprintf(name, sizeof(name), "thread%d", i);

		t = of_get_child_by_name(core, name);

		if (t) {

		if (!t)

			break;



		leaf = false;

		cpu = get_cpu_for_node(t);

		if (cpu >= 0) {
@@ -541,9 +543,8 @@ static int __init parse_core(struct device_node *core, int package_id, 
			return -EINVAL;

		}

		of_node_put(t);

		}

		i++;

	} while (t);

	} while (1);



	/*

	 * We've already gotten threads number in this core, update the SMT
@@ -590,7 +591,9 @@ static int __init parse_cluster(struct device_node *cluster, int package_id, 
	do {

		snprintf(name, sizeof(name), "cluster%d", i);

		c = of_get_child_by_name(cluster, name);

		if (c) {

		if (!c)

			break;



		leaf = false;

		ret = parse_cluster(c, package_id, i, depth + 1);

		if (depth > 0)
@@ -598,28 +601,27 @@ static int __init parse_cluster(struct device_node *cluster, int package_id, 
		of_node_put(c);

		if (ret != 0)

			return ret;

		}

		i++;

	} while (c);

	} while (1);



	/* Now check for cores */

	i = 0;

	do {

		snprintf(name, sizeof(name), "core%d", i);

		c = of_get_child_by_name(cluster, name);

		if (c) {

		if (!c)

			break;



		has_cores = true;



		if (depth == 0) {

				pr_err("%pOF: cpu-map children should be clusters\n",

				       c);

			pr_err("%pOF: cpu-map children should be clusters\n", c);

			of_node_put(c);

			return -EINVAL;

		}



		if (leaf) {

				ret = parse_core(c, package_id, cluster_id,

						 core_id++);

			ret = parse_core(c, package_id, cluster_id, core_id++);

		} else {

			pr_err("%pOF: Non-leaf cluster with core %s\n",

			       cluster, name);
@@ -629,9 +631,8 @@ static int __init parse_cluster(struct device_node *cluster, int package_id, 
		of_node_put(c);

		if (ret != 0)

			return ret;

		}

		i++;

	} while (c);

	} while (1);



	if (leaf && !has_cores)

		pr_warn("%pOF: empty cluster\n", cluster);
@@ -649,15 +650,17 @@ static int __init parse_socket(struct device_node *socket) 
	do {

		snprintf(name, sizeof(name), "socket%d", package_id);

		c = of_get_child_by_name(socket, name);

		if (c) {

		if (!c)

			break;



		has_socket = true;

		ret = parse_cluster(c, package_id, -1, 0);

		of_node_put(c);

		if (ret != 0)

			return ret;

		}



		package_id++;

	} while (c);

	} while (1);



	if (!has_socket)

		ret = parse_cluster(socket, 0, -1, 0);