diff -rup a/src/shared/linux_osl.c b/src/shared/linux_osl.c
--- a/src/shared/linux_osl.c	2020-04-21 08:30:44.872033927 +0200
+++ b/src/shared/linux_osl.c	2020-04-21 08:33:31.744546100 +0200
@@ -946,7 +946,7 @@ 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 -rup a/src/wl/sys/wl_linux.c b/src/wl/sys/wl_linux.c
--- a/src/wl/sys/wl_linux.c	2020-04-21 08:30:44.876033940 +0200
+++ b/src/wl/sys/wl_linux.c	2020-04-21 08:33:31.744546100 +0200
@@ -588,7 +588,7 @@ wl_attach(uint16 vendor, uint16 device,
 	}
 	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;
 	}
@@ -777,9 +777,9 @@ wl_pci_probe(struct pci_dev *pdev, const
 	pci_read_config_dword(pdev, 0x40, &val);
 	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_size);
+	bar1_size = pci_resource_len(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);
 
@@ -3354,12 +3354,19 @@ wl_proc_write(struct file *filp, const c
 }
 
 #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)