@@ -135,3 +135,24 @@ void devres_release_all(struct udevice *dev)
{
release_nodes(dev, &dev->devres_head, false);
}
+
+/*
+ * Managed kmalloc/kfree
+ */
+static void devm_kmalloc_release(struct udevice *dev, void *res)
+{
+ /* noop */
+}
+
+void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
+{
+ void *data;
+
+ data = devres_alloc(devm_kmalloc_release, size, gfp);
+ if (unlikely(!data))
+ return NULL;
+
+ devres_add(dev, data);
+
+ return data;
+}
@@ -14,6 +14,8 @@
#include <dm/uclass-id.h>
#include <fdtdec.h>
#include <linker_lists.h>
+#include <linux/compat.h>
+#include <linux/kernel.h>
#include <linux/list.h>
struct driver_info;
@@ -466,4 +468,25 @@ void devres_add(struct udevice *dev, void *res);
void devres_release_probe(struct udevice *dev);
void devres_release_all(struct udevice *dev);
+/* managed devm_k.alloc/kfree for device drivers */
+void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
+static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
+{
+ return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
+}
+static inline void *devm_kmalloc_array(struct udevice *dev,
+ size_t n, size_t size, gfp_t flags)
+{
+ if (size != 0 && n > SIZE_MAX / size)
+ return NULL;
+ return devm_kmalloc(dev, n * size, flags);
+}
+static inline void *devm_kcalloc(struct udevice *dev,
+ size_t n, size_t size, gfp_t flags)
+{
+ return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
+}
+void devm_kfree(struct udevice *dev, void *p);
+
+
#endif
devm_kmalloc() is identical to kmalloc() except that the memory allocated with it is managed and will be automatically released when the device is removed/unbound. Likewise for the other variants. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> --- drivers/core/devres.c | 21 +++++++++++++++++++++ include/dm/device.h | 23 +++++++++++++++++++++++ 2 files changed, 44 insertions(+)