diff --git src/shared/linux_osl.c src/shared/linux_osl.c
index 6157d18..8237ec7 100644
--- a/src/shared/linux_osl.c
+++ b/src/shared/linux_osl.c
@@ -942,7 +942,7 @@ osl_getcycles(void)
 void *
 osl_reg_map(uint32 pa, uint size)
 {
-	return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
+	return (ioremap((unsigned long)pa, (unsigned long)size));
 }
 
 void
diff --git src/wl/sys/wl_linux.c src/wl/sys/wl_linux.c
index 0d05100..2ed1f0d 100644
--- a/src/wl/sys/wl_linux.c
+++ b/src/wl/sys/wl_linux.c
@@ -582,7 +582,7 @@ wl_attach(uint16 vendor, uint16 device, ulong regs,
 	}
 	wl->bcm_bustype = bustype;
 
-	if ((wl->regsva = ioremap_nocache(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
+	if ((wl->regsva = ioremap(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
 		WL_ERROR(("wl%d: ioremap() failed\n", unit));
 		goto fail;
 	}
@@ -772,7 +772,7 @@ wl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if ((val & 0x0000ff00) != 0)
 		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
 		bar1_size = pci_resource_len(pdev, 2);
-		bar1_addr = (uchar *)ioremap_nocache(pci_resource_start(pdev, 2),
+		bar1_addr = (uchar *)ioremap(pci_resource_start(pdev, 2),
 			bar1_size);
 	wl = wl_attach(pdev->vendor, pdev->device, pci_resource_start(pdev, 0), PCI_BUS, pdev,
 		pdev->irq, bar1_addr, bar1_size);
@@ -3335,12 +3335,19 @@ wl_proc_write(struct file *filp, const char __user *buff, size_t length, loff_t
 }
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 6, 0)
+static struct proc_ops wl_fops = {
+        .proc_read     = wl_proc_read,
+        .proc_write    = wl_proc_write,
+};
+#else
 static const struct file_operations wl_fops = {
 	.owner	= THIS_MODULE,
 	.read	= wl_proc_read,
 	.write	= wl_proc_write,
 };
 #endif
+#endif
 
 static int
 wl_reg_proc_entry(wl_info_t *wl)