ion: add new ion_user_handle_t type for the user-space token

Declare new ion_user_handle_t type to contain the token returned to user-space.
This allows a 2-step migration of the user-space code to a new kernel header
first, then will allow us to change the definition of the ion_user_handle_type_t
to int without breaking the API.

Change-Id: I4200b6600df8e56fe98cf1580a13a65cb25ec646
Signed-off-by: Rom Lemarchand <romlem@google.com>
(cherry picked from commit ebb8269bbb05b06ecedca3e21b3e65f23d48eadd)

diff --git a/drivers/gpu/ion/ion.c b/drivers/gpu/ion/ion.c
index 1d4c8876ab5cc761e4d31b72cf9774ec0a53b739..8fe7d523f7225beee0f29ab435d353435a208ea0 100644 (file)
--- a/drivers/gpu/ion/ion.c
+++ b/drivers/gpu/ion/ion.c
@@ -1139,7 +1139,7 @@ static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                if (IS_ERR(handle))
                        return PTR_ERR(handle);
 
-               data.handle = (struct ion_handle *)handle->id;
+               data.handle = (ion_user_handle_t)handle->id;
 
                if (copy_to_user((void __user *)arg, &data, sizeof(data))) {
                        ion_free(client, handle);
@@ -1191,7 +1191,7 @@ static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                if (IS_ERR(handle))
                        ret = PTR_ERR(handle);
                else
-                       data.handle = (struct ion_handle *)handle->id;
+                       data.handle = (ion_user_handle_t)handle->id;
 
                if (copy_to_user((void __user *)arg, &data,
                                 sizeof(struct ion_fd_data)))

diff --git a/include/linux/ion.h b/include/linux/ion.h
index 440f4b3b0a4ad862d78ff9a6e41d3c0e436c2ad3..40ea332ebfa22ce131ae3ef7f3e8d7c7d20771b7 100644 (file)
--- a/include/linux/ion.h
+++ b/include/linux/ion.h
@@ -20,6 +20,8 @@
 #include <linux/types.h>
 
 struct ion_handle;
+typedef struct ion_handle *ion_user_handle_t;
+
 /**
  * enum ion_heap_types - list of all possible types of heaps
  * @ION_HEAP_TYPE_SYSTEM:       memory allocated via vmalloc
@@ -268,7 +270,7 @@ struct ion_allocation_data {
        size_t align;
        unsigned int heap_id_mask;
        unsigned int flags;
-       struct ion_handle *handle;
+       ion_user_handle_t handle;
 };
 
 /**
@@ -282,7 +284,7 @@ struct ion_allocation_data {
  * provides the file descriptor and the kernel returns the handle.
  */
 struct ion_fd_data {
-       struct ion_handle *handle;
+       ion_user_handle_t handle;
        int fd;
 };
 
@@ -291,7 +293,7 @@ struct ion_fd_data {
  * @handle:    a handle
  */
 struct ion_handle_data {
-       struct ion_handle *handle;
+       ion_user_handle_t handle;
 };
 
 /**