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authorQian Cai <cai@lca.pw>2020-03-05 15:15:02 -0500
committerJoerg Roedel <jroedel@suse.de>2020-03-10 10:30:52 +0100
commitf5152416528c2295f35dd9c9bd4fb27c4032413d (patch)
treee0cfb8b61e4428ef408442a7098af8cf47f5733e /drivers/iommu
parent2d48ea0efb8887ebba3e3720bb5b738aced4e574 (diff)
iommu/vt-d: Silence RCU-list debugging warnings
Similar to the commit 02d715b4a818 ("iommu/vt-d: Fix RCU list debugging warnings"), there are several other places that call list_for_each_entry_rcu() outside of an RCU read side critical section but with dmar_global_lock held. Silence those false positives as well. drivers/iommu/intel-iommu.c:4288 RCU-list traversed in non-reader section!! 1 lock held by swapper/0/1: #0: ffffffff935892c8 (dmar_global_lock){+.+.}, at: intel_iommu_init+0x1ad/0xb97 drivers/iommu/dmar.c:366 RCU-list traversed in non-reader section!! 1 lock held by swapper/0/1: #0: ffffffff935892c8 (dmar_global_lock){+.+.}, at: intel_iommu_init+0x125/0xb97 drivers/iommu/intel-iommu.c:5057 RCU-list traversed in non-reader section!! 1 lock held by swapper/0/1: #0: ffffffffa71892c8 (dmar_global_lock){++++}, at: intel_iommu_init+0x61a/0xb13 Signed-off-by: Qian Cai <cai@lca.pw> Acked-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/dmar.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 071bb42bbbc5..7b16c4db40b4 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -363,7 +363,8 @@ dmar_find_dmaru(struct acpi_dmar_hardware_unit *drhd)
{
struct dmar_drhd_unit *dmaru;
- list_for_each_entry_rcu(dmaru, &dmar_drhd_units, list)
+ list_for_each_entry_rcu(dmaru, &dmar_drhd_units, list,
+ dmar_rcu_check())
if (dmaru->segment == drhd->segment &&
dmaru->reg_base_addr == drhd->address)
return dmaru;