Merge "Minor refactoring of Append/PrependProperties() methods Test: `m nothing` and compare ninja file Bug: n/a"
diff --git a/android/soongconfig/modules.go b/android/soongconfig/modules.go
index 3a93f47..09a5057 100644
--- a/android/soongconfig/modules.go
+++ b/android/soongconfig/modules.go
@@ -20,6 +20,7 @@
 	"reflect"
 	"sort"
 	"strings"
+	"sync"
 
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/parser"
@@ -239,10 +240,18 @@
 	ValueVars  map[string]bool
 }
 
+var bp2buildSoongConfigVarsLock sync.Mutex
+
 // SoongConfigVariablesForBp2build extracts information from a
 // SoongConfigDefinition that bp2build needs to generate constraint settings and
 // values for, in order to migrate soong_config_module_type usages to Bazel.
 func (defs *Bp2BuildSoongConfigDefinitions) AddVars(mtDef SoongConfigDefinition) {
+	// In bp2build mode, this method is called concurrently in goroutines from
+	// loadhooks while parsing soong_config_module_type, so add a mutex to
+	// prevent concurrent map writes. See b/207572723
+	bp2buildSoongConfigVarsLock.Lock()
+	defer bp2buildSoongConfigVarsLock.Unlock()
+
 	if defs.StringVars == nil {
 		defs.StringVars = make(map[string]map[string]bool)
 	}
diff --git a/apex/prebuilt.go b/apex/prebuilt.go
index 5b070c6..84bdcdd 100644
--- a/apex/prebuilt.go
+++ b/apex/prebuilt.go
@@ -257,8 +257,8 @@
 		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
 			func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
 				entries.SetString("LOCAL_MODULE_PATH", p.installDir.ToMakePath().String())
-				entries.SetString("LOCAL_SOONG_INSTALLED_MODULE :=", filepath.Join(p.installDir.String(), fi.stem()))
-				entries.SetString("LOCAL_SOONG_INSTALL_PAIRS :=",
+				entries.SetString("LOCAL_SOONG_INSTALLED_MODULE", filepath.Join(p.installDir.String(), fi.stem()))
+				entries.SetString("LOCAL_SOONG_INSTALL_PAIRS",
 					fi.builtFile.String()+":"+filepath.Join(p.installDir.String(), fi.stem()))
 
 				// soong_java_prebuilt.mk sets LOCAL_MODULE_SUFFIX := .jar  Therefore