PA: move in ecache_grow.

include/jemalloc/internal/arena_structs.h

@@ -163,9 +163,6 @@ struct arena_s {
 	arena_decay_t		decay_dirty; /* dirty --> muzzy */
 	arena_decay_t		decay_muzzy; /* muzzy --> retained */
 
-	/* The grow info for the retained ecache. */
-	ecache_grow_t		ecache_grow;
-
 	/*
 	 * bins is used to store heaps of free regions.
 	 *

include/jemalloc/internal/pa.h

@@ -30,6 +30,9 @@ struct pa_shard_s {
 	/* The source of edata_t objects. */
 	edata_cache_t edata_cache;
 
+	/* The grow info for the retained ecache. */
+	ecache_grow_t ecache_grow;
+
 	pa_shard_stats_t *stats;
 };