[XFS] Cleanup references to i_sem.

SGI-PV: 904196
SGI-Modid: xfs-linux-melb:xfs-kern:25480a
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_lrw.c

@@ -249,9 +249,8 @@ xfs_read(
 	if (n < size)
 		size = n;
 
-	if (XFS_FORCED_SHUTDOWN(mp)) {
+	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
-	}
 
 	if (unlikely(ioflags & IO_ISDIRECT))
 		mutex_lock(&inode->i_mutex);
@@ -267,7 +266,7 @@ xfs_read(
 					dmflags, &locktype);
 		if (ret) {
 			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-			goto unlock_isem;
+			goto unlock_mutex;
 		}
 	}
 
@@ -281,7 +280,7 @@ xfs_read(
 
 	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
 
-unlock_isem:
+unlock_mutex:
 	if (unlikely(ioflags & IO_ISDIRECT))
 		mutex_unlock(&inode->i_mutex);
 	return ret;
@@ -573,7 +572,7 @@ xfs_write(
 	vrwlock_t		locktype;
 	size_t			ocount = 0, count;
 	loff_t			pos;
-	int			need_isem = 1, need_flush = 0;
+	int			need_i_mutex = 1, need_flush = 0;
 
 	XFS_STATS_INC(xs_write_calls);
 
@@ -622,14 +621,14 @@ xfs_write(
 			return XFS_ERROR(-EINVAL);
 
 		if (!VN_CACHED(vp) && pos < i_size_read(inode))
-			need_isem = 0;
+			need_i_mutex = 0;
 
 		if (VN_CACHED(vp))
 			need_flush = 1;
 	}
 
 relock:
-	if (need_isem) {
+	if (need_i_mutex) {
 		iolock = XFS_IOLOCK_EXCL;
 		locktype = VRWLOCK_WRITE;
 
@@ -651,7 +650,7 @@ xfs_write(
 					S_ISBLK(inode->i_mode));
 	if (error) {
 		xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock);
-		goto out_unlock_isem;
+		goto out_unlock_mutex;
 	}
 
 	new_size = pos + count;
@@ -663,7 +662,7 @@ xfs_write(
 		loff_t		savedsize = pos;
 		int		dmflags = FILP_DELAY_FLAG(file);
 
-		if (need_isem)
+		if (need_i_mutex)
 			dmflags |= DM_FLAGS_IMUX;
 
 		xfs_iunlock(xip, XFS_ILOCK_EXCL);
@@ -672,7 +671,7 @@ xfs_write(
 				      dmflags, &locktype);
 		if (error) {
 			xfs_iunlock(xip, iolock);
-			goto out_unlock_isem;
+			goto out_unlock_mutex;
 		}
 		xfs_ilock(xip, XFS_ILOCK_EXCL);
 		eventsent = 1;
@@ -710,7 +709,7 @@ xfs_write(
 					isize, pos + count);
 		if (error) {
 			xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock);
-			goto out_unlock_isem;
+			goto out_unlock_mutex;
 		}
 	}
 	xfs_iunlock(xip, XFS_ILOCK_EXCL);
@@ -731,7 +730,7 @@ xfs_write(
 			error = -remove_suid(file->f_dentry);
 		if (unlikely(error)) {
 			xfs_iunlock(xip, iolock);
-			goto out_unlock_isem;
+			goto out_unlock_mutex;
 		}
 	}
 
@@ -747,14 +746,14 @@ xfs_write(
 					-1, FI_REMAPF_LOCKED);
 		}
 
-		if (need_isem) {
+		if (need_i_mutex) {
 			/* demote the lock now the cached pages are gone */
 			XFS_ILOCK_DEMOTE(mp, io, XFS_IOLOCK_EXCL);
 			mutex_unlock(&inode->i_mutex);
 
 			iolock = XFS_IOLOCK_SHARED;
 			locktype = VRWLOCK_WRITE_DIRECT;
-			need_isem = 0;
+			need_i_mutex = 0;
 		}
 
  		xfs_rw_enter_trace(XFS_DIOWR_ENTER, io, (void *)iovp, segs,
@@ -772,7 +771,7 @@ xfs_write(
 			pos += ret;
 			count -= ret;
 
-			need_isem = 1;
+			need_i_mutex = 1;
 			ioflags &= ~IO_ISDIRECT;
 			xfs_iunlock(xip, iolock);
 			goto relock;
@@ -794,14 +793,14 @@ xfs_write(
 	    !(ioflags & IO_INVIS)) {
 
 		xfs_rwunlock(bdp, locktype);
-		if (need_isem)
+		if (need_i_mutex)
 			mutex_unlock(&inode->i_mutex);
 		error = XFS_SEND_NAMESP(xip->i_mount, DM_EVENT_NOSPACE, vp,
 				DM_RIGHT_NULL, vp, DM_RIGHT_NULL, NULL, NULL,
 				0, 0, 0); /* Delay flag intentionally  unused */
 		if (error)
 			goto out_nounlocks;
-		if (need_isem)
+		if (need_i_mutex)
 			mutex_lock(&inode->i_mutex);
 		xfs_rwlock(bdp, locktype);
 		pos = xip->i_d.di_size;
@@ -905,9 +904,9 @@ xfs_write(
 			if (error)
 				goto out_unlock_internal;
 		}
-	
+
 		xfs_rwunlock(bdp, locktype);
-		if (need_isem)
+		if (need_i_mutex)
 			mutex_unlock(&inode->i_mutex);
 
 		error = sync_page_range(inode, mapping, pos, ret);
@@ -918,8 +917,8 @@ xfs_write(
 
  out_unlock_internal:
 	xfs_rwunlock(bdp, locktype);
- out_unlock_isem:
-	if (need_isem)
+ out_unlock_mutex:
+	if (need_i_mutex)
 		mutex_unlock(&inode->i_mutex);
  out_nounlocks:
 	return -error;