From 64dd11b8b3028342928d9e53589c24cdadc733f9 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 17 Feb 2021 07:13:02 +0100 Subject: [PATCH] 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 Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin --- 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 27c7630141148..1bae4a65416b2 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -770,7 +770,7 @@ 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;