Revert "sync: remove legacy sync info API"

This reverts commit 798ba95bda14f9f28561a2a27ba406537f8bb8a8.

Brodcom uses the sync_fence_info_data directly.
https://android-build.googleplex.com/builds/submitted/4821789/elfin-userdebug/latest/view/logs/build_error.log

Change-Id: I72fed683397e9b10007b71253e20ded43726d377
(cherry picked from commit eed25df46a22a143a0341113759894c23a9b6cbf)
diff --git a/libsync/include/android/sync.h b/libsync/include/android/sync.h
index 32bb878..68f74a0 100644
--- a/libsync/include/android/sync.h
+++ b/libsync/include/android/sync.h
@@ -41,8 +41,28 @@
 
 __BEGIN_DECLS
 
+struct sync_fence_info_data {
+ uint32_t len;
+ char name[32];
+ int32_t status;
+ uint8_t pt_info[0];
+};
+
+struct sync_pt_info {
+ uint32_t len;
+ char obj_name[32];
+ char driver_name[32];
+ int32_t status;
+ uint64_t timestamp_ns;
+ uint8_t driver_data[0];
+};
+
 /* timeout in msecs */
 int sync_wait(int fd, int timeout);
+struct sync_fence_info_data *sync_fence_info(int fd);
+struct sync_pt_info *sync_pt_info(struct sync_fence_info_data *info,
+                                  struct sync_pt_info *itr);
+void sync_fence_info_free(struct sync_fence_info_data *info);
 
 __END_DECLS
 
diff --git a/libsync/sync.c b/libsync/sync.c
index b8c48c7..6b187fa 100644
--- a/libsync/sync.c
+++ b/libsync/sync.c
@@ -30,29 +30,6 @@
 
 #include <android/sync.h>
 
-/* Prototypes for deprecated functions that used to be declared in the legacy
- * android/sync.h. They've been moved here to make sure new code does not use
- * them, but the functions are still defined to avoid breaking existing
- * binaries. Eventually they can be removed altogether.
- */
-struct sync_fence_info_data {
-    uint32_t len;
-    char name[32];
-    int32_t status;
-    uint8_t pt_info[0];
-};
-struct sync_pt_info {
-    uint32_t len;
-    char obj_name[32];
-    char driver_name[32];
-    int32_t status;
-    uint64_t timestamp_ns;
-    uint8_t driver_data[0];
-};
-struct sync_fence_info_data* sync_fence_info(int fd);
-struct sync_pt_info* sync_pt_info(struct sync_fence_info_data* info, struct sync_pt_info* itr);
-void sync_fence_info_free(struct sync_fence_info_data* info);
-
 /* Legacy Sync API */
 
 struct sync_legacy_merge_data {
diff --git a/libsync/tests/sync_test.cpp b/libsync/tests/sync_test.cpp
index 011b09d..0fb86d6 100644
--- a/libsync/tests/sync_test.cpp
+++ b/libsync/tests/sync_test.cpp
@@ -15,35 +15,6 @@
 #include <random>
 #include <unordered_map>
 
-/* These deprecated declarations were in the legacy android/sync.h. They've been removed to
- * encourage code to move to the modern equivalents. But they are still implemented in libsync.so
- * to avoid breaking existing binaries; as long as that's true we should keep testing them here.
- * That means making local copies of the declarations.
- */
-extern "C" {
-
-struct sync_fence_info_data {
-    uint32_t len;
-    char name[32];
-    int32_t status;
-    uint8_t pt_info[0];
-};
-
-struct sync_pt_info {
-    uint32_t len;
-    char obj_name[32];
-    char driver_name[32];
-    int32_t status;
-    uint64_t timestamp_ns;
-    uint8_t driver_data[0];
-};
-
-struct sync_fence_info_data* sync_fence_info(int fd);
-struct sync_pt_info* sync_pt_info(struct sync_fence_info_data* info, struct sync_pt_info* itr);
-void sync_fence_info_free(struct sync_fence_info_data* info);
-
-}  // extern "C"
-
 // TODO: better stress tests?
 // Handle more than 64 fd's simultaneously, i.e. fix sync_fence_info's 4k limit.
 // Handle wraparound in timelines like nvidia.