diff --git a/drivers/video/tegra/nvmap/nvmap_dev.c b/drivers/video/tegra/nvmap/nvmap_dev.c
index 5719b748..ef04850e 100644
--- a/drivers/video/tegra/nvmap/nvmap_dev.c
+++ b/drivers/video/tegra/nvmap/nvmap_dev.c
@@ -450,10 +450,6 @@ static long nvmap_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		err = nvmap_ioctl_get_available_heaps(filp, uarg);
 		break;
 
-	case NVMAP_IOC_GET_HEAP_SIZE:
-		err = nvmap_ioctl_get_heap_size(filp, uarg);
-		break;
-
 	case NVMAP_IOC_PARAMETERS:
 		err = nvmap_ioctl_get_handle_parameters(filp, uarg);
 		break;
diff --git a/drivers/video/tegra/nvmap/nvmap_ioctl.c b/drivers/video/tegra/nvmap/nvmap_ioctl.c
index 062cf305..352f5fde 100644
--- a/drivers/video/tegra/nvmap/nvmap_ioctl.c
+++ b/drivers/video/tegra/nvmap/nvmap_ioctl.c
@@ -1024,29 +1024,6 @@ int nvmap_ioctl_get_available_heaps(struct file *filp, void __user *arg)
 	return 0;
 }
 
-int nvmap_ioctl_get_heap_size(struct file *filp, void __user *arg)
-{
-	struct nvmap_heap_size op;
-	struct nvmap_heap *heap;
-	int i;
-	memset(&op, 0, sizeof(op));
-
-	if (copy_from_user(&op, arg, sizeof(op)))
-		return -EFAULT;
-
-	for (i = 0; i < nvmap_dev->nr_carveouts; i++) {
-		if (op.heap & nvmap_dev->heaps[i].heap_bit) {
-			heap = nvmap_dev->heaps[i].carveout;
-			op.size = nvmap_query_heap_size(heap);
-			if (copy_to_user(arg, &op, sizeof(op)))
-				return -EFAULT;
-			return 0;
-		}
-	}
-	return -ENODEV;
-
-}
-
 int nvmap_ioctl_get_handle_parameters(struct file *filp, void __user *arg)
 {
 	struct nvmap_client *client = filp->private_data;
diff --git a/drivers/video/tegra/nvmap/nvmap_ioctl.h b/drivers/video/tegra/nvmap/nvmap_ioctl.h
index d3221656..3aaa291e 100644
--- a/drivers/video/tegra/nvmap/nvmap_ioctl.h
+++ b/drivers/video/tegra/nvmap/nvmap_ioctl.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (c) 2010-2023, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2010-2024, NVIDIA CORPORATION. All rights reserved.
  *
  * ioctl declarations for nvmap
  */
@@ -50,7 +50,6 @@ int nvmap_ioctl_set_tag_label(struct file *filp, void __user *arg);
 
 int nvmap_ioctl_get_available_heaps(struct file *filp, void __user *arg);
 
-int nvmap_ioctl_get_heap_size(struct file *filp, void __user *arg);
 void kasan_memcpy_toio(void __iomem *to, const void *from,
 			size_t count);
 
diff --git a/include/uapi/linux/nvmap.h b/include/uapi/linux/nvmap.h
index 5bd92a6d..a2d388bd 100644
--- a/include/uapi/linux/nvmap.h
+++ b/include/uapi/linux/nvmap.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (c) 2009-2023, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2009-2024, NVIDIA CORPORATION. All rights reserved.
  *
  * structure declarations for nvmem and nvmap user-space ioctls
  */
@@ -204,11 +204,6 @@ struct nvmap_available_heaps {
 	__u64 heaps;		/* heaps bitmask */
 };
 
-struct nvmap_heap_size {
-	__u32 heap;
-	__u64 size;
-};
-
 struct nvmap_sciipc_map {
 	__u64 auth_token;    /* AuthToken */
 	__u32 flags;       /* Exporter permission flags */
@@ -337,9 +332,6 @@ struct nvmap_fd_for_range_from_list {
 #define NVMAP_IOC_GET_AVAILABLE_HEAPS \
 	_IOR(NVMAP_IOC_MAGIC, 25, struct nvmap_available_heaps)
 
-#define NVMAP_IOC_GET_HEAP_SIZE \
-	_IOR(NVMAP_IOC_MAGIC, 26, struct nvmap_heap_size)
-
 #define NVMAP_IOC_PARAMETERS \
 	_IOR(NVMAP_IOC_MAGIC, 27, struct nvmap_handle_parameters)