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s390/smp: __smp_rescan_cpus() - move cpumask away from stack 

[ 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@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiko Carstens 2021-02-17 07:13:02 +01:00 committed by Greg Kroah-Hartman
parent 54fc6a56f7
commit 508d56e2c5
1 changed files with 1 additions and 1 deletions
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arch/s390/kernel/smp.c
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@ -765,7 +765,7 @@ 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;