diff --git a/fs_mgr/libsnapshot/snapuserd/Android.bp b/fs_mgr/libsnapshot/snapuserd/Android.bp
index 93b0f7c..4d86007 100644
--- a/fs_mgr/libsnapshot/snapuserd/Android.bp
+++ b/fs_mgr/libsnapshot/snapuserd/Android.bp
@@ -61,12 +61,12 @@
         "dm-snapshot-merge/snapuserd_worker.cpp",
         "dm-snapshot-merge/snapuserd_readahead.cpp",
         "snapuserd_daemon.cpp",
-	"snapuserd_buffer.cpp",
-	"user-space-merge/snapuserd_core.cpp",
-	"user-space-merge/snapuserd_dm_user.cpp",
-	"user-space-merge/snapuserd_merge.cpp",
-	"user-space-merge/snapuserd_readahead.cpp",
-	"user-space-merge/snapuserd_transitions.cpp",
+        "snapuserd_buffer.cpp",
+        "user-space-merge/snapuserd_core.cpp",
+        "user-space-merge/snapuserd_dm_user.cpp",
+        "user-space-merge/snapuserd_merge.cpp",
+        "user-space-merge/snapuserd_readahead.cpp",
+        "user-space-merge/snapuserd_transitions.cpp",
         "user-space-merge/snapuserd_server.cpp",
     ],
 
@@ -95,7 +95,14 @@
     init_rc: [
         "snapuserd.rc",
     ],
+
+    // snapuserd is started during early boot by first-stage init. At that
+    // point, /system is mounted using the "dm-user" device-mapper kernel
+    // module. dm-user routes all I/O to userspace to be handled by
+    // snapuserd, which would lead to deadlock if we had to handle page
+    // faults for its code pages.
     static_executable: true,
+
     system_shared_libs: [],
     ramdisk_available: true,
     vendor_ramdisk_available: true,
@@ -111,7 +118,7 @@
         "dm-snapshot-merge/cow_snapuserd_test.cpp",
         "dm-snapshot-merge/snapuserd.cpp",
         "dm-snapshot-merge/snapuserd_worker.cpp",
-	"snapuserd_buffer.cpp",
+        "snapuserd_buffer.cpp",
     ],
     cflags: [
         "-Wall",