diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7de543d..24198ad 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -19,6 +19,7 @@
 #include <linux/kdev_t.h>
 #include <linux/notifier.h>
 #include <linux/genhd.h>
+#include <linux/kallsyms.h>
 #include <asm/semaphore.h>
 
 #include "base.h"
@@ -68,6 +69,10 @@
 
 	if (dev_attr->show)
 		ret = dev_attr->show(dev, dev_attr, buf);
+	if (ret >= (ssize_t)PAGE_SIZE) {
+		print_symbol("dev_attr_show: %s returned bad count\n",
+				(unsigned long)dev_attr->show);
+	}
 	return ret;
 }
 
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 977d29b..4cb949f 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1097,6 +1097,8 @@
 }
 
 static struct iova_domain reserved_iova_list;
+static struct lock_class_key reserved_alloc_key;
+static struct lock_class_key reserved_rbtree_key;
 
 static void dmar_init_reserved_ranges(void)
 {
@@ -1107,6 +1109,11 @@
 
 	init_iova_domain(&reserved_iova_list, DMA_32BIT_PFN);
 
+	lockdep_set_class(&reserved_iova_list.iova_alloc_lock,
+		&reserved_alloc_key);
+	lockdep_set_class(&reserved_iova_list.iova_rbtree_lock,
+		&reserved_rbtree_key);
+
 	/* IOAPIC ranges shouldn't be accessed by DMA */
 	iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START),
 		IOVA_PFN(IOAPIC_RANGE_END));
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 183fdda..a4445b7 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -314,24 +314,6 @@
 }
 EXPORT_SYMBOL_GPL(pci_find_ht_capability);
 
-void pcie_wait_pending_transaction(struct pci_dev *dev)
-{
-	int pos;
-	u16 reg16;
-
-	pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
-	if (!pos)
-		return;
-	while (1) {
-		pci_read_config_word(dev, pos + PCI_EXP_DEVSTA, &reg16);
-		if (!(reg16 & PCI_EXP_DEVSTA_TRPND))
-			break;
-		cpu_relax();
-	}
-
-}
-EXPORT_SYMBOL_GPL(pcie_wait_pending_transaction);
-
 /**
  * pci_find_parent_resource - return resource region of parent bus of given region
  * @dev: PCI device structure contains resources to be searched
@@ -936,9 +918,6 @@
 	if (atomic_sub_return(1, &dev->enable_cnt) != 0)
 		return;
 
-	/* Wait for all transactions are finished before disabling the device */
-	pcie_wait_pending_transaction(dev);
-
 	pci_read_config_word(dev, PCI_COMMAND, &pci_command);
 	if (pci_command & PCI_COMMAND_MASTER) {
 		pci_command &= ~PCI_COMMAND_MASTER;
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index e8a01f2..1175908 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -470,6 +470,8 @@
 
 	vma->vm_flags |= VM_IO | VM_RESERVED;
 
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
 	return remap_pfn_range(vma,
 			       vma->vm_start,
 			       idev->info->mem[mi].addr >> PAGE_SHIFT,
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index a271c87..baa663e 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 #include <linux/kobject.h>
+#include <linux/kallsyms.h>
 #include <linux/namei.h>
 #include <linux/poll.h>
 #include <linux/list.h>
@@ -86,7 +87,12 @@
 	 * The code works fine with PAGE_SIZE return but it's likely to
 	 * indicate truncated result or overflow in normal use cases.
 	 */
-	BUG_ON(count >= (ssize_t)PAGE_SIZE);
+	if (count >= (ssize_t)PAGE_SIZE) {
+		print_symbol("fill_read_buffer: %s returned bad count\n",
+			(unsigned long)ops->show);
+		/* Try to struggle along */
+		count = PAGE_SIZE - 1;
+	}
 	if (count >= 0) {
 		buffer->needs_read_fill = 0;
 		buffer->count = count;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b7e4b63..ea760e51 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -513,7 +513,6 @@
 int pci_find_ext_capability(struct pci_dev *dev, int cap);
 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
-void pcie_wait_pending_transaction(struct pci_dev *dev);
 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
 
 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
@@ -884,9 +883,6 @@
 	return 0;
 }
 
-static inline void pcie_wait_pending_transaction(struct pci_dev *dev)
-{ }
-
 /* Power management related routines */
 static inline int pci_save_state(struct pci_dev *dev)
 {