From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Sasha Levin <sashal@kernel.org>,
linux-s390@vger.kernel.org
Subject: [PATCH AUTOSEL 4.4 7/8] s390/smp: __smp_rescan_cpus() - move cpumask away from stack
Date: Tue, 2 Mar 2021 06:59:34 -0500 [thread overview]
Message-ID: <20210302115935.63777-7-sashal@kernel.org> (raw)
In-Reply-To: <20210302115935.63777-1-sashal@kernel.org>
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 f113fcd781d8..486f0d4f9aee 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -738,7 +738,7 @@ 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
next prev parent reply other threads:[~2021-03-02 15:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 11:59 [PATCH AUTOSEL 4.4 1/8] mmc: mxs-mmc: Fix a resource leak in an error handling path in 'mxs_mmc_probe()' Sasha Levin
2021-03-02 11:59 ` [PATCH AUTOSEL 4.4 2/8] mmc: mediatek: fix race condition between msdc_request_timeout and irq Sasha Levin
2021-03-02 11:59 ` Sasha Levin
2021-03-02 11:59 ` Sasha Levin
2021-03-02 11:59 ` [PATCH AUTOSEL 4.4 3/8] powerpc/perf: Record counter overflow always if SAMPLE_IP is unset Sasha Levin
2021-03-02 11:59 ` Sasha Levin
2021-03-02 11:59 ` [PATCH AUTOSEL 4.4 4/8] sparc32: Limit memblock allocation to low memory Sasha Levin
2021-03-02 11:59 ` Sasha Levin
2021-03-03 8:21 ` Andreas Larsson
2021-03-03 8:21 ` Andreas Larsson
2021-03-02 11:59 ` [PATCH AUTOSEL 4.4 5/8] x86, build: use objtool mcount Sasha Levin
2021-03-02 11:59 ` [PATCH AUTOSEL 4.4 6/8] PCI: xgene-msi: Fix race in installing chained irq handler Sasha Levin
2021-03-02 11:59 ` Sasha Levin
2021-03-02 11:59 ` Sasha Levin [this message]
2021-03-02 11:59 ` [PATCH AUTOSEL 4.4 8/8] scsi: libiscsi: Fix iscsi_prep_scsi_cmd_pdu() error handling Sasha Levin
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