do not require for exclusive access to buffer

fs/reiserfs/Makefile

@@ -6,7 +6,7 @@ obj-$(CONFIG_REISERFS_FS) += reiserfs.o
 
 reiserfs-objs := bitmap.o do_balan.o namei.o inode.o file.o dir.o fix_node.o \
 		 super.o prints.o objectid.o lbalance.o ibalance.o stree.o \
-		 hashes.o buffer2.o tail_conversion.o journal.o resize.o \
+		 hashes.o tail_conversion.o journal.o resize.o \
 		 item_ops.o ioctl.o procfs.o
 
 # gcc -O2 (the kernel default)  is overaggressive on ppc32 when many inline

fs/reiserfs/do_balan.c

@@ -1078,13 +1078,9 @@ static int balance_leaf (struct tree_balance * tb,
 	memcpy (insert_key + i,B_N_PKEY(S_new[i],0),KEY_SIZE);
 	insert_ptr[i] = S_new[i];
 
-	RFALSE( (atomic_read (&(S_new[i]->b_count)) != 1) &&
-		(atomic_read(&(S_new[i]->b_count)) != 2 ||
-		 !(buffer_journaled(S_new[i]) || 
-		   buffer_journal_dirty(S_new[i]))), 
+	RFALSE (!buffer_journaled (S_new [i]) || buffer_journal_dirty (S_new [i]) ||
+		buffer_dirty (S_new [i]),
 		"PAP-12247: S_new[%d] : (%b)\n", i, S_new[i]);
-
-
     }
 
     /* if the affected item was not wholly shifted then we perform all necessary operations on that part or whole of the

fs/reiserfs/fix_node.c

@@ -807,32 +807,15 @@ static int  get_empty_nodes(
 	    "PAP-8135: reiserfs_new_blocknrs failed when got new blocks");
 
     p_s_new_bh = sb_getblk(p_s_sb, *p_n_blocknr);
-    if (atomic_read (&(p_s_new_bh->b_count)) > 1) {
-/*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
-/*
-      reiserfs_warning ("waiting for buffer %b, iput inode pid = %d, this pid %d, mode %c, %h\n",
-			p_s_new_bh, put_inode_pid, current->pid, p_s_tb->tb_vn->vn_mode, p_s_tb->tb_vn->vn_ins_ih);
-      print_tb (0, 0, 0, p_s_tb, "tb");
-*/
-/*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
-      if (atomic_read(&(p_s_new_bh->b_count)) > 2 || 
-          !(buffer_journaled(p_s_new_bh) || buffer_journal_dirty(p_s_new_bh))) {
-	n_retval = REPEAT_SEARCH ;
-	free_buffers_in_tb (p_s_tb);
-	wait_buffer_until_released (p_s_new_bh);
-      }
-    }
-    RFALSE( (atomic_read (&(p_s_new_bh->b_count)) != 1 || 
-	     buffer_dirty (p_s_new_bh)) && 
-	    (atomic_read(&(p_s_new_bh->b_count)) > 2 || 
-	     !(buffer_journaled(p_s_new_bh) || 
-	       buffer_journal_dirty(p_s_new_bh))),
-	    "PAP-8140: not free or dirty buffer %b for the new block", 
+    RFALSE (buffer_dirty (p_s_new_bh) ||
+	    buffer_journaled (p_s_new_bh) ||
+	    buffer_journal_dirty (p_s_new_bh),
+	    "PAP-8140: journlaled or dirty buffer %b for the new block", 
 	    p_s_new_bh);
     
     /* Put empty buffers into the array. */
-    if (p_s_tb->FEB[p_s_tb->cur_blknum])
-      BUG();
+    RFALSE (p_s_tb->FEB[p_s_tb->cur_blknum],
+	    "PAP-8141: busy slot for new buffer");
 
     mark_buffer_journal_new(p_s_new_bh) ;
     p_s_tb->FEB[p_s_tb->cur_blknum++] = p_s_new_bh;
@@ -1926,7 +1909,7 @@ static int  get_neighbors(
 
 	n_child_position = ( p_s_bh == p_s_tb->FL[n_h] ) ? p_s_tb->lkey[n_h] : B_NR_ITEMS (p_s_tb->FL[n_h]);
 	n_son_number = B_N_CHILD_NUM(p_s_tb->FL[n_h], n_child_position);
-	p_s_bh = reiserfs_bread(p_s_sb, n_son_number);
+	p_s_bh = sb_bread(p_s_sb, n_son_number);
 	if (!p_s_bh)
 	    return IO_ERROR;
 	if ( FILESYSTEM_CHANGED_TB (p_s_tb) ) {
@@ -1959,7 +1942,7 @@ static int  get_neighbors(
 
 	n_child_position = ( p_s_bh == p_s_tb->FR[n_h] ) ? p_s_tb->rkey[n_h] + 1 : 0;
 	n_son_number = B_N_CHILD_NUM(p_s_tb->FR[n_h], n_child_position);
-	p_s_bh = reiserfs_bread(p_s_sb, n_son_number);
+	p_s_bh = sb_bread(p_s_sb, n_son_number);
 	if (!p_s_bh)
 	    return IO_ERROR;
 	if ( FILESYSTEM_CHANGED_TB (p_s_tb) ) {

fs/reiserfs/ibalance.c

@@ -1028,9 +1028,8 @@ int balance_internal (struct tree_balance * tb,			/* tree_balance structure 		*/
 	/* new_insert_ptr = node_pointer to S_new */
 	new_insert_ptr = S_new;
 
-	RFALSE(( buffer_locked(S_new) || atomic_read (&(S_new->b_count)) != 1) &&
-	       (buffer_locked(S_new) || atomic_read(&(S_new->b_count)) > 2 ||
-		!(buffer_journaled(S_new) || buffer_journal_dirty(S_new))),
+	RFALSE (!buffer_journaled(S_new) || buffer_journal_dirty(S_new) ||
+		buffer_dirty (S_new),
 		"cm-00001: bad S_new (%b)", S_new);
 
 	// S_new is released in unfix_nodes

fs/reiserfs/stree.c

@@ -700,7 +700,7 @@ int search_by_key (struct super_block * p_s_sb,
 	/* Read the next tree node, and set the last element in the path to
            have a pointer to it. */
 	if ( ! (p_s_bh = p_s_last_element->pe_buffer =
-		reiserfs_bread(p_s_sb, n_block_number)) ) {
+		sb_bread(p_s_sb, n_block_number)) ) {
 	    p_s_search_path->path_length --;
 	    pathrelse(p_s_search_path);
 	    return IO_ERROR;

fs/reiserfs/super.c

@@ -775,7 +775,7 @@ static int read_old_bitmaps (struct super_block * s)
   memset (SB_AP_BITMAP (s), 0, sizeof (struct buffer_head *) * sb_bmap_nr(rs));
 
   for (i = 0; i < sb_bmap_nr(rs); i ++) {
-    SB_AP_BITMAP (s)[i] = reiserfs_bread (s, bmp1 + i);
+    SB_AP_BITMAP (s)[i] = sb_bread (s, bmp1 + i);
     if (!SB_AP_BITMAP (s)[i])
       return 1;
   }
@@ -827,7 +827,7 @@ static int read_super_block (struct super_block * s, int offset)
     sb_set_blocksize (s, sb_blocksize(rs));
     brelse (bh);
     
-    bh = reiserfs_bread (s, offset / s->s_blocksize);
+    bh = sb_bread (s, offset / s->s_blocksize);
     if (!bh) {
 	printk("sh-2007: read_super_block: "
                 "bread failed (dev %s, block %lu, size %lu)\n",

include/linux/reiserfs_fs.h

@@ -1937,14 +1937,6 @@ void reiserfs_unmap_buffer(struct buffer_head *) ;
 extern struct inode_operations reiserfs_file_inode_operations;
 extern struct file_operations reiserfs_file_operations;
 extern struct address_space_operations reiserfs_address_space_operations ;
-int get_new_buffer (struct reiserfs_transaction_handle *th, struct buffer_head *,
-		    struct buffer_head **, struct path *);
-
-
-/* buffer2.c */
-struct buffer_head * reiserfs_getblk (struct super_block *super, int n_block);
-void wait_buffer_until_released (const struct buffer_head * bh);
-struct buffer_head * reiserfs_bread (struct super_block *super, int n_block);
 
 /* fix_nodes.c */
 #ifdef CONFIG_REISERFS_CHECK