lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240423083043.3735921-5-dawei.li@shingroup.cn>
Date: Tue, 23 Apr 2024 16:30:41 +0800
From: Dawei Li <dawei.li@...ngroup.cn>
To: davem@...emloft.net,
	andreas@...sler.com
Cc: sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	sam@...nborg.org,
	Dawei Li <dawei.li@...ngroup.cn>
Subject: [PATCH v3 4/6] sparc/pci_msi: Remove on-stack cpumask var

In general it's preferable to avoid placing cpumasks on the stack, as
for large values of NR_CPUS these can consume significant amounts of
stack space and make stack overflows more likely.

@cpumask of irq_set_affinity() is read-only and free of change, drop
unneeded cpumask var.

Reviewed-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Dawei Li <dawei.li@...ngroup.cn>
---
 arch/sparc/kernel/pci_msi.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/sparc/kernel/pci_msi.c b/arch/sparc/kernel/pci_msi.c
index fc7402948b7b..acb2f83a1d5c 100644
--- a/arch/sparc/kernel/pci_msi.c
+++ b/arch/sparc/kernel/pci_msi.c
@@ -287,10 +287,7 @@ static int bringup_one_msi_queue(struct pci_pbm_info *pbm,
 
 	nid = pbm->numa_node;
 	if (nid != -1) {
-		cpumask_t numa_mask;
-
-		cpumask_copy(&numa_mask, cpumask_of_node(nid));
-		irq_set_affinity(irq, &numa_mask);
+		irq_set_affinity(irq, cpumask_of_node(nid));
 	}
 	err = request_irq(irq, sparc64_msiq_interrupt, 0,
 			  "MSIQ",
-- 
2.27.0


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ