pgindent run of recent SSI changes. Also, remove an unnecessary #include.

Kevin Grittner

src/backend/access/nbtree/nbtree.c

@@ -29,7 +29,6 @@
 #include "storage/indexfsm.h"
 #include "storage/ipc.h"
 #include "storage/lmgr.h"
-#include "storage/predicate.h"
 #include "storage/smgr.h"
 #include "tcop/tcopprot.h"
 #include "utils/memutils.h"

src/backend/access/nbtree/nbtsearch.c

@@ -849,8 +849,8 @@ _bt_first(IndexScanDesc scan, ScanDirection dir)
 	if (!BufferIsValid(buf))
 	{
 		/*
-		 * We only get here if the index is completely empty.
+		 * We only get here if the index is completely empty. Lock relation
-		 * Lock relation because nothing finer to lock exists.
+		 * because nothing finer to lock exists.
 		 */
 		PredicateLockRelation(rel, scan->xs_snapshot);
 		return false;

src/backend/storage/lmgr/predicate.c

@@ -483,10 +483,9 @@ SerializationNeededForRead(Relation relation, Snapshot snapshot)
 	 * MySerializableXact, so that subsequent calls to this function can exit
 	 * quickly.
 	 *
-	 * A transaction is flagged as RO_SAFE if all concurrent R/W
+	 * A transaction is flagged as RO_SAFE if all concurrent R/W transactions
-	 * transactions commit without having conflicts out to an earlier
+	 * commit without having conflicts out to an earlier snapshot, thus
-	 * snapshot, thus ensuring that no conflicts are possible for this
+	 * ensuring that no conflicts are possible for this transaction.
-	 * transaction.
 	 */
 	if (SxactIsROSafe(MySerializableXact))
 	{

src/include/storage/predicate_internals.h

@@ -132,8 +132,8 @@ typedef struct PredXactListData
 	/*
 	 * These global variables are maintained when registering and cleaning up
 	 * serializable transactions.  They must be global across all backends,
-	 * but are not needed outside the predicate.c source file. Protected
+	 * but are not needed outside the predicate.c source file. Protected by
-	 * by SerializableXactHashLock.
+	 * SerializableXactHashLock.
 	 */
 	TransactionId SxactGlobalXmin;		/* global xmin for active serializable
 										 * transactions */