On Sun, May 29, 2022 at 01:14:46PM +0800, Baolu Lu wrote: > From 1e87b5df40c6ce9414cdd03988c3b52bfb17af5f Mon Sep 17 00:00:00 2001 > From: Lu Baolu <baolu...@linux.intel.com> > Date: Sun, 29 May 2022 10:18:56 +0800 > Subject: [PATCH 1/1] iommu/vt-d: debugfs: Remove device_domain_lock usage > > The domain_translation_struct debugfs node is used to dump static > mappings of PCI devices. It potentially races with setting new > domains to devices and the iommu_map/unmap() interfaces. The existing > code tries to use the global spinlock device_domain_lock to avoid the > races, but this is problematical as this lock is only used to protect > the device tracking lists of the domains. > > Instead of using an immature lock to cover up the problem, it's better > to explicitly restrict the use of this debugfs node. This also makes > device_domain_lock static.
What does "explicitly restrict" mean? Jason _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
