commit 14c6e409a4b29f77e5ed2f24e62dc9d3366fc61a
author Martijn Coenen <maco@google.com> Fri Jun 23 10:35:34 2017 -0700
committer Martijn Coenen <maco@google.com> Fri Jul 21 10:19:33 2017 +0200
tree c39be797c0963d99b830d660669da1549e9f8001
parent c657a969f3d44b2ecd8c99aa2eb5173380b37366

Let hwbinder nodes inherit real-time scheduling policy.

This was previously controlled by hwservicemanager calling
an ioctl, but we've decided to make the priority inheritance
more fine-grained with the binder patchstack on common -
eg see https://android-review.googlesource.com/#/c/421861/

Bug: 62946141
Test: flag is set on binder_node in hwbinder objects
Change-Id: Ia093e173a205a2180eb35eea9aa29c3a67cc66a8

Parcel.cpp

diff --git a/Parcel.cpp b/Parcel.cpp
index cd54740..cc3d957 100644
--- a/Parcel.cpp
+++ b/Parcel.cpp
@@ -217,7 +217,7 @@
             int priority = local->getMinSchedulingPriority();
 
             obj.flags = priority & FLAT_BINDER_FLAG_PRIORITY_MASK;
-            obj.flags |= FLAT_BINDER_FLAG_ACCEPTS_FDS;
+            obj.flags |= FLAT_BINDER_FLAG_ACCEPTS_FDS | FLAT_BINDER_FLAG_INHERIT_RT;
             obj.flags |= (policy & 3) << FLAT_BINDER_FLAG_SCHEDPOLICY_SHIFT;
             obj.type = BINDER_TYPE_BINDER;
             obj.binder = reinterpret_cast<uintptr_t>(local->getWeakRefs());

include/hwbinder/binder_kernel.h

diff --git a/include/hwbinder/binder_kernel.h b/include/hwbinder/binder_kernel.h
index 2adbf23..bf94a57 100644
--- a/include/hwbinder/binder_kernel.h
+++ b/include/hwbinder/binder_kernel.h
@@ -109,6 +109,7 @@
 enum {
         FLAT_BINDER_FLAG_SCHEDPOLICY_MASK = 0x600,
         FLAT_BINDER_FLAG_SCHEDPOLICY_SHIFT = 9,
+        FLAT_BINDER_FLAG_INHERIT_RT = 0x800,
 };
 
 struct binder_node_debug_info {