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diff --git a/sys/compat/linuxkpi/common/include/linux/io.h b/sys/compat/linuxkpi/common/include/linux/io.h
--- a/sys/compat/linuxkpi/common/include/linux/io.h
+++ b/sys/compat/linuxkpi/common/include/linux/io.h
@@ -521,6 +521,20 @@
return (addr);
}
+#define devm_memremap(...) linuxkpi_devm_memremap(__VA_ARGS__)
+void *linuxkpi_devm_memremap(struct device *dev, resource_size_t offset,
+ size_t size, unsigned long flags);
+
+static inline void *
+devm_ioremap_wc(struct device *dev, resource_size_t offset,
+ resource_size_t size)
+{
+ void *addr;
+
+ addr = devm_memremap(dev, offset, size, MEMREMAP_WC);
+ return (IS_ERR(addr) ? NULL : addr);
+}
+
static inline void
memunmap(void *addr)
{
diff --git a/sys/compat/linuxkpi/common/src/linux_page.c b/sys/compat/linuxkpi/common/src/linux_page.c
--- a/sys/compat/linuxkpi/common/src/linux_page.c
+++ b/sys/compat/linuxkpi/common/src/linux_page.c
@@ -65,6 +65,7 @@
#include <linux/idr.h>
#include <linux/io.h>
#include <linux/io-mapping.h>
+#include <linux/device.h>
#ifdef __i386__
DEFINE_IDR(mtrr_idr);
@@ -420,6 +421,35 @@
kfree(vmmap);
}
+static void
+lkpi_devm_memremap_unmap(struct device *dev, void *p)
+{
+ void **dr = p;
+
+ memunmap(*dr);
+}
+
+void *
+linuxkpi_devm_memremap(struct device *dev, resource_size_t offset, size_t size,
+ unsigned long flags)
+{
+ void **dr, *addr;
+
+ dr = devres_alloc(lkpi_devm_memremap_unmap, sizeof(*dr), GFP_KERNEL);
+ if (dr == NULL)
+ return (ERR_PTR(-ENOMEM));
+ addr = memremap(offset, size, flags);
+ if (addr != NULL) {
+ *dr = addr;
+ devres_add(dev, dr);
+ } else {
+ addr = ERR_PTR(-ENXIO);
+ devres_free(dr);
+ }
+
+ return (addr);
+}
+
void *
vmap(struct page **pages, unsigned int count, unsigned long flags, int prot)
{

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