linux-kernel - [PATCH v6 14/21] arch_topology: Check for non-negative value rather than -1 for IDs validity

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220704101605.1318280-15-sudeep.holla@arm.com>
Date:   Mon,  4 Jul 2022 11:15:58 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Sudeep Holla <sudeep.holla@....com>, conor.dooley@...rochip.com,
        valentina.fernandezalanis@...rochip.com,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Qing Wang <wangqing@...o.com>,
        Rob Herring <robh+dt@...nel.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Ionela Voinescu <ionela.voinescu@....com>,
        Pierre Gondois <pierre.gondois@....com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Gavin Shan <gshan@...hat.com>
Subject: [PATCH v6 14/21] arch_topology: Check for non-negative value rather than -1 for IDs validity

Instead of just comparing the cpu topology IDs with -1 to check their
validity, improve that by checking for a valid non-negative value.

Suggested-by: Andy Shevchenko <andy.shevchenko@...il.com>
Tested-by: Ionela Voinescu <ionela.voinescu@....com>
Reviewed-by: Gavin Shan <gshan@...hat.com>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/base/arch_topology.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 6ab173caf1dc..c0b0ee64a79d 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -642,7 +642,7 @@ static int __init parse_dt_topology(void)
 	 * only mark cores described in the DT as possible.
 	 */
 	for_each_possible_cpu(cpu)
-		if (cpu_topology[cpu].package_id == -1)
+		if (cpu_topology[cpu].package_id < 0)
 			ret = -EINVAL;
 
 out_map:
@@ -714,7 +714,7 @@ void update_siblings_masks(unsigned int cpuid)
 		if (cpuid_topo->cluster_id != cpu_topo->cluster_id)
 			continue;
 
-		if (cpuid_topo->cluster_id != -1) {
+		if (cpuid_topo->cluster_id >= 0) {
 			cpumask_set_cpu(cpu, &cpuid_topo->cluster_sibling);
 			cpumask_set_cpu(cpuid, &cpu_topo->cluster_sibling);
 		}
-- 
2.37.0