[PATCH] prevent concurrent calls to txCommit on the imap inode (5 of 6)

# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
#   2004/07/07 15:56:52-05:00 [email protected] 
#   JFS: prevent concurrent calls to txCommit on the imap inode
#   
#   Signed-off-by: Dave Kleikamp <[email protected]>
# 
diff -Nru a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
--- a/fs/jfs/jfs_imap.c	2004-07-07 16:38:05 -05:00
+++ b/fs/jfs/jfs_imap.c	2004-07-07 16:38:05 -05:00
@@ -1280,6 +1280,7 @@
 	 * to be freed by the transaction;  
 	 */
 	tid = txBegin(ipimap->i_sb, COMMIT_FORCE);
+	down(&JFS_IP(ipimap)->commit_sem);
 
 	/* acquire tlock of the iag page of the freed ixad 
 	 * to force the page NOHOMEOK (even though no data is
@@ -1312,6 +1313,7 @@
 	rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
 
 	txEnd(tid);
+	up(&JFS_IP(ipimap)->commit_sem);
 
 	/* unlock the AG inode map information */
 	AG_UNLOCK(imap, agno);
@@ -2622,10 +2624,13 @@
 		 */
 #endif				/*  _STILL_TO_PORT */
 		tid = txBegin(sb, COMMIT_FORCE);
+		down(&JFS_IP(ipimap)->commit_sem);
 
 		/* update the inode map addressing structure to point to it */
 		if ((rc =
 		     xtInsert(tid, ipimap, 0, blkno, xlen, &xaddr, 0))) {
+			txEnd(tid);
+			up(&JFS_IP(ipimap)->commit_sem);
 			/* Free the blocks allocated for the iag since it was
 			 * not successfully added to the inode map
 			 */
@@ -2650,6 +2655,7 @@
 		rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
 
 		txEnd(tid);
+		up(&JFS_IP(ipimap)->commit_sem);
 
 		duplicateIXtree(sb, blkno, xlen, &xaddr);