* [PATCH AUTOSEL 5.4 28/33] s390/smp: __smp_rescan_cpus() - move cpumask away from stack
[not found] <20210302115749.62653-1-sashal@kernel.org>
@ 2021-03-02 11:57 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2021-03-02 11:57 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Heiko Carstens, Vasily Gorbik, Sasha Levin, linux-s390
From: Heiko Carstens <hca@linux.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@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.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 659d99af9156..8c51462f13fd 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -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;
--
2.30.1
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2021-03-03 2:28 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <20210302115749.62653-1-sashal@kernel.org>
2021-03-02 11:57 ` [PATCH AUTOSEL 5.4 28/33] s390/smp: __smp_rescan_cpus() - move cpumask away from stack Sasha Levin
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).