[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210315135547.312229029@linuxfoundation.org>
Date: Mon, 15 Mar 2021 14:54:13 +0100
From: gregkh@...uxfoundation.org
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 160/290] s390/smp: __smp_rescan_cpus() - move cpumask away from stack
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
From: Heiko Carstens <hca@...ux.ibm.com>
[ Upstream commit 62c8dca9e194326802b43c60763f856d782b225c ]
Avoid a potentially large stack frame and overflow by making
"cpumask_t avail" a static variable. There is no concurrent
access due to the existing locking.
Signed-off-by: Heiko Carstens <hca@...ux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/s390/kernel/smp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 3a0d545f0ce8..791bc373418b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -775,7 +775,7 @@ static int smp_add_core(struct sclp_core_entry *core, cpumask_t *avail,
static int __smp_rescan_cpus(struct sclp_core_info *info, bool early)
{
struct sclp_core_entry *core;
- cpumask_t avail;
+ static cpumask_t avail;
bool configured;
u16 core_id;
int nr, i;
--
2.30.1
Powered by blists - more mailing lists