diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 34dc9fe..099c3df 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -40,7 +40,7 @@
 
 #define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
 
-enum { MAX_SYS_FILES = 8 };
+enum { MAX_SYS_FILES = 10 };
 
 const char* k_traceTagsProperty = "debug.atrace.tags.enableflags";
 const char* k_traceAppCmdlineProperty = "debug.atrace.app_cmdlines";
@@ -99,6 +99,12 @@
         { REQ,      "/sys/kernel/debug/tracing/events/power/cpu_idle/enable" },
     } },
     { "disk",       "Disk I/O",         0, {
+        { REQ,      "/sys/kernel/debug/tracing/events/f2fs/f2fs_sync_file_enter/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/f2fs/f2fs_sync_file_exit/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/f2fs/f2fs_write_begin/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/f2fs/f2fs_write_end/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/ext4/ext4_da_write_begin/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/ext4/ext4_da_write_end/enable" },
         { REQ,      "/sys/kernel/debug/tracing/events/ext4/ext4_sync_file_enter/enable" },
         { REQ,      "/sys/kernel/debug/tracing/events/ext4/ext4_sync_file_exit/enable" },
         { REQ,      "/sys/kernel/debug/tracing/events/block/block_rq_issue/enable" },
diff --git a/libs/ui/Fence.cpp b/libs/ui/Fence.cpp
index 93ec0ce..3c0306c 100644
--- a/libs/ui/Fence.cpp
+++ b/libs/ui/Fence.cpp
@@ -138,7 +138,7 @@
     if (size < getFlattenedSize() || count < getFdCount()) {
         return NO_MEMORY;
     }
-    FlattenableUtils::write(buffer, size, getFdCount());
+    FlattenableUtils::write(buffer, size, (uint32_t)getFdCount());
     if (isValid()) {
         *fds++ = mFenceFd;
         count--;
@@ -156,7 +156,7 @@
         return NO_MEMORY;
     }
 
-    size_t numFds;
+    uint32_t numFds;
     FlattenableUtils::read(buffer, size, numFds);
 
     if (numFds > 1) {