From: David van Moolenbroek <david@minix3.org>
Date: Sat, 28 Mar 2015 00:45:28 +0000 (+0000)
Subject: libminixfs: miscellaneous API cleanup
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=0314acfb2d68447dfa1b0b33aa4c25b1cbfa85d3;p=minix.git

libminixfs: miscellaneous API cleanup

Mostly removal of unused parameters from calls.

Change-Id: I0eb7b568265d1669492d958e78b9e69d7cf6fc05
---

diff --git a/minix/fs/ext2/balloc.c b/minix/fs/ext2/balloc.c
index 947e9f538..fd1e18505 100644
--- a/minix/fs/ext2/balloc.c
+++ b/minix/fs/ext2/balloc.c
@@ -228,11 +228,11 @@ struct inode *rip;		/* used for preallocation */
 			rip->i_prealloc_count = EXT2_PREALLOC_BLOCKS - 1;
 
 			lmfs_markdirty(bp);
-			put_block(bp, MAP_BLOCK);
+			put_block(bp);
 
 			gd->free_blocks_count -= EXT2_PREALLOC_BLOCKS;
 			sp->s_free_blocks_count -= EXT2_PREALLOC_BLOCKS;
-			lmfs_blockschange(sp->s_dev, -EXT2_PREALLOC_BLOCKS);
+			lmfs_blockschange(-EXT2_PREALLOC_BLOCKS);
 			group_descriptors_dirty = 1;
 			return block;
 		}
@@ -253,11 +253,11 @@ struct inode *rip;		/* used for preallocation */
 	check_block_number(block, sp, gd);
 
 	lmfs_markdirty(bp);
-	put_block(bp, MAP_BLOCK);
+	put_block(bp);
 
 	gd->free_blocks_count--;
 	sp->s_free_blocks_count--;
-	lmfs_blockschange(sp->s_dev, -1);
+	lmfs_blockschange(-1);
 	group_descriptors_dirty = 1;
 
 	if (update_bsearch && block != -1 && block != NO_BLOCK) {
@@ -319,11 +319,11 @@ void free_block(struct super_block *sp, bit_t bit_returned)
 	panic("Tried to free unused block %d", bit_returned);
 
   lmfs_markdirty(bp);
-  put_block(bp, MAP_BLOCK);
+  put_block(bp);
 
   gd->free_blocks_count++;
   sp->s_free_blocks_count++;
-  lmfs_blockschange(sp->s_dev, 1);
+  lmfs_blockschange(1);
 
   group_descriptors_dirty = 1;
 
diff --git a/minix/fs/ext2/buf.h b/minix/fs/ext2/buf.h
index b700f735a..f1ffe1065 100644
--- a/minix/fs/ext2/buf.h
+++ b/minix/fs/ext2/buf.h
@@ -1,31 +1,12 @@
-/* Buffer (block) cache.  To acquire a block, a routine calls get_block(),
- * telling which block it wants.  The block is then regarded as "in use"
- * and has its 'b_count' field incremented.  All the blocks that are not
- * in use are chained together in an LRU list, with 'front' pointing
- * to the least recently used block, and 'rear' to the most recently used
- * block.  A reverse chain, using the field b_prev is also maintained.
- * Usage for LRU is measured by the time the put_block() is done.  The second
- * parameter to put_block() can violate the LRU order and put a block on the
- * front of the list, if it will probably not be needed soon.  If a block
- * is modified, the modifying routine must set b_dirt to DIRTY, so the block
- * will eventually be rewritten to the disk.
- */
-
 #ifndef EXT2_BUF_H
 #define EXT2_BUF_H
 
-#include <sys/dirent.h>
-
 union fsdata_u {
-    char b__data[1];             /* ordinary user data */
-/* indirect block */
-    block_t b__ind[1];
-/* bit map block */
-    bitchunk_t b__bitmap[1];
+    char b__data[1];		/* ordinary user data */
+    block_t b__ind[1];		/* indirect block */
+    bitchunk_t b__bitmap[1];	/* bit map block */
 };
 
-/* A block is free if b_dev == NO_DEV. */
-
 /* These defs make it possible to use to bp->b_data instead of bp->b.b__data */
 #define b_data(bp)   ((union fsdata_u *) bp->data)->b__data
 #define b_ind(bp) ((union fsdata_u *) bp->data)->b__ind
diff --git a/minix/fs/ext2/ialloc.c b/minix/fs/ext2/ialloc.c
index 967a3d216..97f6bcf76 100644
--- a/minix/fs/ext2/ialloc.c
+++ b/minix/fs/ext2/ialloc.c
@@ -181,7 +181,7 @@ int is_dir;			/* inode will be a directory if it is TRUE */
   }
 
   lmfs_markdirty(bp);
-  put_block(bp, MAP_BLOCK);
+  put_block(bp);
 
   gd->free_inodes_count--;
   sp->s_free_inodes_count--;
@@ -233,7 +233,7 @@ static void free_inode_bit(struct super_block *sp, bit_t bit_returned,
 	panic("Tried to free unused inode %d", bit_returned);
 
   lmfs_markdirty(bp);
-  put_block(bp, MAP_BLOCK);
+  put_block(bp);
 
   gd->free_inodes_count++;
   sp->s_free_inodes_count++;
diff --git a/minix/fs/ext2/inode.c b/minix/fs/ext2/inode.c
index 783ae793c..72592e61a 100644
--- a/minix/fs/ext2/inode.c
+++ b/minix/fs/ext2/inode.c
@@ -341,7 +341,7 @@ void rw_inode(
 
   icopy(rip, dip, rw_flag, TRUE);
 
-  put_block(bp, INODE_BLOCK);
+  put_block(bp);
   rip->i_dirt = IN_CLEAN;
 }
 
diff --git a/minix/fs/ext2/link.c b/minix/fs/ext2/link.c
index a2069c73d..7890f7b23 100644
--- a/minix/fs/ext2/link.c
+++ b/minix/fs/ext2/link.c
@@ -181,7 +181,7 @@ ssize_t fs_rdlink(ino_t ino_nr, struct fsdriver_data *data, size_t bytes)
 	if (bytes > rip->i_size)
 		bytes = rip->i_size;
 	r = fsdriver_copyout(data, 0, link_text, bytes);
-	put_block(bp, DIRECTORY_BLOCK);
+	put_block(bp);
 	if (r == OK)
 		r = bytes;
   }
@@ -652,5 +652,5 @@ off_t len;
 	panic("zeroblock_range: len too long: %lld", len);
   memset(b_data(bp) + offset, 0, len);
   lmfs_markdirty(bp);
-  put_block(bp, FULL_DATA_BLOCK);
+  put_block(bp);
 }
diff --git a/minix/fs/ext2/mount.c b/minix/fs/ext2/mount.c
index 6b9db4207..f2c619904 100644
--- a/minix/fs/ext2/mount.c
+++ b/minix/fs/ext2/mount.c
@@ -88,7 +88,7 @@ int fs_mount(dev_t dev, unsigned int flags, struct fsdriver_node *root_node,
 	return(EINVAL);
   }
 
-  lmfs_set_blocksize(superblock->s_block_size, major(fs_dev));
+  lmfs_set_blocksize(superblock->s_block_size);
 
   /* Get the root inode of the mounted file system. */
   if ( (root_ip = get_inode(fs_dev, ROOT_INODE)) == NULL)  {
diff --git a/minix/fs/ext2/open.c b/minix/fs/ext2/open.c
index cb4714b6b..31145d599 100644
--- a/minix/fs/ext2/open.c
+++ b/minix/fs/ext2/open.c
@@ -185,7 +185,7 @@ int fs_slink(ino_t dir_nr, char *name, uid_t uid, gid_t gid,
 		  }
 	}
 
-	put_block(bp, DIRECTORY_BLOCK); /* put_block() accepts NULL. */
+	put_block(bp); /* put_block() accepts NULL. */
 
 	if(r != OK) {
 		sip->i_links_count = NO_LINK;
diff --git a/minix/fs/ext2/path.c b/minix/fs/ext2/path.c
index cac197b94..0fb0c3711 100644
--- a/minix/fs/ext2/path.c
+++ b/minix/fs/ext2/path.c
@@ -216,7 +216,7 @@ int ftype;			 /* used when ENTER and INCOMPAT_FILETYPE */
 				*numb = (ino_t) conv4(le_CPU, dp->d_ino);
 			}
 			assert(lmfs_dev(bp) != NO_DEV);
-			put_block(bp, DIRECTORY_BLOCK);
+			put_block(bp);
 			return(r);
 		}
 
@@ -252,7 +252,7 @@ int ftype;			 /* used when ENTER and INCOMPAT_FILETYPE */
 	/* The whole block has been searched or ENTER has a free slot. */
 	assert(lmfs_dev(bp) != NO_DEV);
 	if (e_hit) break;	/* e_hit set if ENTER can be performed now */
-	put_block(bp, DIRECTORY_BLOCK); /* otherwise, continue searching dir */
+	put_block(bp);		 /* otherwise, continue searching dir */
   }
 
   /* The whole directory has now been searched. */
@@ -302,7 +302,7 @@ int ftype;			 /* used when ENTER and INCOMPAT_FILETYPE */
 		dp->d_file_type = EXT2_FT_UNKNOWN;
   }
   lmfs_markdirty(bp);
-  put_block(bp, DIRECTORY_BLOCK);
+  put_block(bp);
   ldir_ptr->i_update |= CTIME | MTIME;	/* mark mtime for update later */
   ldir_ptr->i_dirt = IN_DIRTY;
 
diff --git a/minix/fs/ext2/proto.h b/minix/fs/ext2/proto.h
index 5f237c64a..9573c49c8 100644
--- a/minix/fs/ext2/proto.h
+++ b/minix/fs/ext2/proto.h
@@ -2,7 +2,7 @@
 #define EXT2_PROTO_H
 
 #define get_block(d, n, t) lmfs_get_block(d, n, t)
-#define put_block(n, t) lmfs_put_block(n, t)
+#define put_block(n) lmfs_put_block(n)
 
 /* Function prototypes. */
 
diff --git a/minix/fs/ext2/read.c b/minix/fs/ext2/read.c
index 2e4afd408..28d1f73c2 100644
--- a/minix/fs/ext2/read.c
+++ b/minix/fs/ext2/read.c
@@ -10,6 +10,7 @@
 #include "inode.h"
 #include "super.h"
 #include <sys/param.h>
+#include <sys/dirent.h>
 #include <assert.h>
 
 
@@ -193,8 +194,7 @@ int *completed;                 /* number of bytes copied */
 	lmfs_markdirty(bp);
   }
 
-  n = (off + chunk == block_size ? FULL_DATA_BLOCK : PARTIAL_DATA_BLOCK);
-  put_block(bp, n);
+  put_block(bp);
 
   return(r);
 }
@@ -262,7 +262,7 @@ int opportunistic;
 		excess = block_pos - triple_ind_s;
 		mindex = excess / addr_in_block2;
 		b = rd_indir(bp, mindex);	/* num of double ind block */
-		put_block(bp, INDIRECT_BLOCK);	/* release triple ind block */
+		put_block(bp);			/* release triple ind block */
 		excess = excess % addr_in_block2;
 	}
 	if (b == NO_BLOCK) return(NO_BLOCK);
@@ -273,7 +273,7 @@ int opportunistic;
 	ASSERT(lmfs_dev(bp) == rip->i_dev);
 	mindex = excess / addr_in_block;
 	b = rd_indir(bp, mindex);	/* num of single ind block */
-	put_block(bp, INDIRECT_BLOCK);	/* release double ind block */
+	put_block(bp);				/* release double ind block */
 	mindex = excess % addr_in_block;	/* index into single ind blk */
   }
   if (b == NO_BLOCK) return(NO_BLOCK);
@@ -284,7 +284,7 @@ int opportunistic;
   ASSERT(lmfs_dev(bp) != NO_DEV);
   ASSERT(lmfs_dev(bp) == rip->i_dev);
   b = rd_indir(bp, mindex);
-  put_block(bp, INDIRECT_BLOCK);	/* release single ind block */
+  put_block(bp);				/* release single ind block */
 
   return(b);
 }
@@ -439,7 +439,7 @@ unsigned bytes_ahead;           /* bytes beyond position for immediate use */
 	}
 	if (lmfs_dev(bp) != NO_DEV) {
 		/* Oops, block already in the cache, get out. */
-		put_block(bp, FULL_DATA_BLOCK);
+		put_block(bp);
 		break;
 	}
   }
@@ -558,7 +558,7 @@ ssize_t fs_getdents(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
 		}
 	}
 
-	put_block(bp, DIRECTORY_BLOCK);
+	put_block(bp);
 	if (done)
 		break;
   }
diff --git a/minix/fs/ext2/stadir.c b/minix/fs/ext2/stadir.c
index 8045a53f7..233705fcb 100644
--- a/minix/fs/ext2/stadir.c
+++ b/minix/fs/ext2/stadir.c
@@ -75,12 +75,11 @@ int fs_statvfs(struct statvfs *st)
 /*===========================================================================*
  *                              blockstats                                   *
  *===========================================================================*/
-void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used)
+void fs_blockstats(u64_t *blocks, u64_t *free)
 {
         struct super_block *sp = get_super(fs_dev);
 
 	*blocks = sp->s_blocks_count;
 	*free = sp->s_free_blocks_count;
-	*used = *blocks - *free;
 }
 
diff --git a/minix/fs/ext2/write.c b/minix/fs/ext2/write.c
index 638bf4e42..b0d007105 100644
--- a/minix/fs/ext2/write.c
+++ b/minix/fs/ext2/write.c
@@ -131,7 +131,7 @@ int op;				/* special actions */
 	/* Create the double indirect block. */
 		if ( (b2 = alloc_block(rip, rip->i_bsearch) ) == NO_BLOCK) {
 			/* Release triple ind blk. */
-			put_block(bp_tindir, INDIRECT_BLOCK);
+			put_block(bp_tindir);
 			ext2_debug("failed to allocate dblock near %d\n", rip->i_block[0]);
 			return(ENOSPC);
 		}
@@ -174,8 +174,8 @@ int op;				/* special actions */
   if (b1 == NO_BLOCK && !(op & WMAP_FREE)) {
 	if ( (b1 = alloc_block(rip, rip->i_bsearch) ) == NO_BLOCK) {
 		/* Release dbl and triple indirect blks. */
-		put_block(bp_dindir, INDIRECT_BLOCK);
-		put_block(bp_tindir, INDIRECT_BLOCK);
+		put_block(bp_dindir);
+		put_block(bp_tindir);
 		ext2_debug("failed to allocate dblock near %d\n", rip->i_block[0]);
 		return(ENOSPC);
 	}
@@ -228,7 +228,7 @@ int op;				/* special actions */
 	/* b1 equals NO_BLOCK only when we are freeing up the indirect block. */
 	if(b1 != NO_BLOCK)
 		lmfs_markdirty(bp);
-	put_block(bp, INDIRECT_BLOCK);
+	put_block(bp);
   }
 
   /* If the single indirect block isn't there (or was just freed),
@@ -256,8 +256,8 @@ int op;				/* special actions */
 	rip->i_block[EXT2_TIND_BLOCK] = NO_BLOCK;
   }
 
-  put_block(bp_dindir, INDIRECT_BLOCK);	/* release double indirect blk */
-  put_block(bp_tindir, INDIRECT_BLOCK);	/* release triple indirect blk */
+  put_block(bp_dindir);			/* release double indirect blk */
+  put_block(bp_tindir);			/* release triple indirect blk */
 
   return(OK);
 }
@@ -368,8 +368,7 @@ void zero_block(bp)
 register struct buf *bp;	/* pointer to buffer to zero */
 {
 /* Zero a block. */
-  ASSERT(lmfs_bytes(bp) > 0);
   ASSERT(bp->data);
-  memset(b_data(bp), 0, (size_t) lmfs_bytes(bp));
+  memset(b_data(bp), 0, lmfs_fs_block_size());
   lmfs_markdirty(bp);
 }
diff --git a/minix/fs/isofs/inode.c b/minix/fs/isofs/inode.c
index 1bcaf5f1e..1e4474bac 100644
--- a/minix/fs/isofs/inode.c
+++ b/minix/fs/isofs/inode.c
@@ -155,7 +155,7 @@ static struct buf* fetch_inode(struct dir_extent *extent, size_t *offset)
 			break;
 		}
 
-		lmfs_put_block(bp, FULL_DATA_BLOCK);
+		lmfs_put_block(bp);
 		bp = read_extent_block(extent, *offset /
 		    v_pri.logical_block_size_l);
 	}
@@ -180,7 +180,7 @@ int read_inode(struct inode *i_node, struct dir_extent *extent, size_t offset,
 	/* Parse basic ISO 9660 specs. */
 	if (check_dir_record(dir_rec,
 	    offset % v_pri.logical_block_size_l) != OK) {
-		lmfs_put_block(bp, FULL_DATA_BLOCK);
+		lmfs_put_block(bp);
 		return EINVAL;
 	}
 
@@ -199,7 +199,7 @@ int read_inode(struct inode *i_node, struct dir_extent *extent, size_t offset,
 	offset += dir_rec->length;
 	read_inode_extents(i_node, dir_rec, extent, &offset);
 
-	lmfs_put_block(bp, FULL_DATA_BLOCK);
+	lmfs_put_block(bp);
 	if (new_offset != NULL)
 		*new_offset = offset;
 	return OK;
@@ -291,7 +291,7 @@ void read_inode_extents(struct inode *i,
 
 		if (check_dir_record(dir_rec,
 		    *offset % v_pri.logical_block_size_l) != OK) {
-			lmfs_put_block(bp, FULL_DATA_BLOCK);
+			lmfs_put_block(bp);
 			return;
 		}
 
@@ -322,7 +322,7 @@ void read_inode_extents(struct inode *i,
 		if ((dir_rec->file_flags & D_NOT_LAST_EXTENT) == 0)
 			done = TRUE;
 
-		lmfs_put_block(bp, FULL_DATA_BLOCK);
+		lmfs_put_block(bp);
 	}
 }
 
diff --git a/minix/fs/isofs/read.c b/minix/fs/isofs/read.c
index 30d2e42e3..94ac59d00 100644
--- a/minix/fs/isofs/read.c
+++ b/minix/fs/isofs/read.c
@@ -44,7 +44,7 @@ ssize_t fs_read(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
 
 		r = fsdriver_copyout(data, cum_io, b_data(bp)+off, chunk);
 
-		lmfs_put_block(bp, FULL_DATA_BLOCK);
+		lmfs_put_block(bp);
 
 		if (r != OK)
 			break;  /* EOF reached. */
diff --git a/minix/fs/isofs/stadir.c b/minix/fs/isofs/stadir.c
index 1f1978608..741f0b9d4 100644
--- a/minix/fs/isofs/stadir.c
+++ b/minix/fs/isofs/stadir.c
@@ -26,8 +26,8 @@ int fs_statvfs(struct statvfs *st)
 	return OK;
 }
 
-void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used)
+void fs_blockstats(u64_t *blocks, u64_t *free)
 {
-	*used = *blocks = v_pri.volume_space_size_l;
+	*blocks = v_pri.volume_space_size_l;
 	*free = 0;
 }
diff --git a/minix/fs/isofs/super.c b/minix/fs/isofs/super.c
index 4d55c3027..83d63ec8f 100644
--- a/minix/fs/isofs/super.c
+++ b/minix/fs/isofs/super.c
@@ -45,7 +45,7 @@ static int create_vol_pri_desc(struct iso9660_vol_pri_desc *vol_pri, char *buf,
 	    (vol_pri->file_struct_ver != 1))
 		return EINVAL;
 
-	lmfs_set_blocksize(vol_pri->logical_block_size_l, major(fs_dev));
+	lmfs_set_blocksize(vol_pri->logical_block_size_l);
 
 	/* Read root directory record. */
 	root_record = (struct iso9660_dir_record *)vol_pri->root_directory;
diff --git a/minix/fs/isofs/susp.c b/minix/fs/isofs/susp.c
index 2556a7020..a5fde0e27 100644
--- a/minix/fs/isofs/susp.c
+++ b/minix/fs/isofs/susp.c
@@ -50,7 +50,7 @@ int parse_susp(struct rrii_dir_record *dir, char *buffer)
 		}
 
 		parse_susp_buffer(dir, b_data(ca_bp) + ca_offset, ca_length);
-		lmfs_put_block(ca_bp, FULL_DATA_BLOCK);
+		lmfs_put_block(ca_bp);
 
 		return OK;
 	}
diff --git a/minix/fs/mfs/buf.h b/minix/fs/mfs/buf.h
index 9dbcb83e4..898095893 100644
--- a/minix/fs/mfs/buf.h
+++ b/minix/fs/mfs/buf.h
@@ -3,36 +3,14 @@
 
 #include "clean.h"
 
-/* Buffer (block) cache.  To acquire a block, a routine calls get_block(),
- * telling which block it wants.  The block is then regarded as "in use"
- * and has its 'b_count' field incremented.  All the blocks that are not
- * in use are chained together in an LRU list, with 'front' pointing
- * to the least recently used block, and 'rear' to the most recently used
- * block.  A reverse chain, using the field b_prev is also maintained.
- * Usage for LRU is measured by the time the put_block() is done.  The second
- * parameter to put_block() can violate the LRU order and put a block on the
- * front of the list, if it will probably not be needed soon.  If a block
- * is modified, the modifying routine must set b_dirt to DIRTY, so the block
- * will eventually be rewritten to the disk.
- */
-
-#include <sys/dirent.h>
-
 union fsdata_u {
-    char b__data[1];		     /* ordinary user data */
-/* directory block */
-    struct direct b__dir[1];    
-/* V2 indirect block */
-    zone_t  b__v2_ind[1];	     
-/* V2 inode block */
-    d2_inode b__v2_ino[1]; 
-/* bit map block */
-    bitchunk_t b__bitmap[1];  
+    char b__data[1];			/* ordinary user data */
+    struct direct b__dir[1];		/* directory block */
+    zone_t  b__v2_ind[1];		/* V2 indirect block */
+    d2_inode b__v2_ino[1];		/* V2 inode block */
+    bitchunk_t b__bitmap[1];		/* bit map block */
 };
 
-/* A block is free if b_dev == NO_DEV. */
-
-
 /* These defs make it possible to use to bp->b_data instead of bp->b.b__data */
 #define b_data(b)   ((union fsdata_u *) b->data)->b__data
 #define b_dir(b)    ((union fsdata_u *) b->data)->b__dir
@@ -41,4 +19,3 @@ union fsdata_u {
 #define b_bitmap(b) ((union fsdata_u *) b->data)->b__bitmap
 
 #endif
-
diff --git a/minix/fs/mfs/inode.c b/minix/fs/mfs/inode.c
index 7c5a60c83..65c5e3d65 100644
--- a/minix/fs/mfs/inode.c
+++ b/minix/fs/mfs/inode.c
@@ -405,7 +405,7 @@ int rw_flag;			/* READING or WRITING */
   assert(sp->s_version == V3);
   new_icopy(rip, dip2, rw_flag, sp->s_native);
   
-  put_block(bp, INODE_BLOCK);
+  put_block(bp);
   IN_MARKCLEAN(rip);
 }
 
diff --git a/minix/fs/mfs/link.c b/minix/fs/mfs/link.c
index a634e73da..b448cc8e0 100644
--- a/minix/fs/mfs/link.c
+++ b/minix/fs/mfs/link.c
@@ -168,7 +168,7 @@ ssize_t fs_rdlink(ino_t ino_nr, struct fsdriver_data *data, size_t bytes)
 	if (bytes > rip->i_size)
 		bytes = rip->i_size;
 	r = fsdriver_copyout(data, 0, b_data(bp), bytes);
-	put_block(bp, DIRECTORY_BLOCK);
+	put_block(bp);
 	if (r == OK)
 		r = bytes;
   }
@@ -629,7 +629,7 @@ off_t len;
 		bytes = len;
 	memset(b_data(bp) + offset, 0, bytes);
 	MARKDIRTY(bp);
-	put_block(bp, FULL_DATA_BLOCK);
+	put_block(bp);
 
 	pos += bytes;
 	len -= bytes;
diff --git a/minix/fs/mfs/mount.c b/minix/fs/mfs/mount.c
index 544576f2c..4bb751d39 100644
--- a/minix/fs/mfs/mount.c
+++ b/minix/fs/mfs/mount.c
@@ -49,7 +49,7 @@ int fs_mount(dev_t dev, unsigned int flags, struct fsdriver_node *root_node,
 	printf("MFS: WARNING: FS 0x%llx unclean, mounting readonly\n", fs_dev);
   }
   
-  lmfs_set_blocksize(superblock.s_block_size, major(fs_dev));
+  lmfs_set_blocksize(superblock.s_block_size);
   
   /* Get the root inode of the mounted file system. */
   if( (root_ip = get_inode(fs_dev, ROOT_INODE)) == NULL)  {
diff --git a/minix/fs/mfs/open.c b/minix/fs/mfs/open.c
index 67c8225ae..314a45917 100644
--- a/minix/fs/mfs/open.c
+++ b/minix/fs/mfs/open.c
@@ -170,7 +170,7 @@ int fs_slink(ino_t dir_nr, char *name, uid_t uid, gid_t gid,
 		}
 	}
 	  
-	put_block(bp, DIRECTORY_BLOCK); /* put_block() accepts NULL. */
+	put_block(bp); /* put_block() accepts NULL. */
   
 	if(r != OK) {
 		sip->i_nlinks = NO_LINK;
diff --git a/minix/fs/mfs/path.c b/minix/fs/mfs/path.c
index 92328e748..2eae77e58 100644
--- a/minix/fs/mfs/path.c
+++ b/minix/fs/mfs/path.c
@@ -186,7 +186,7 @@ int flag;			 /* LOOK_UP, ENTER, DELETE or IS_EMPTY */
 						      (int) dp->mfs_d_ino);
 			}
 			assert(lmfs_dev(bp) != NO_DEV);
-			put_block(bp, DIRECTORY_BLOCK);
+			put_block(bp);
 			return(r);
 		}
 
@@ -200,7 +200,7 @@ int flag;			 /* LOOK_UP, ENTER, DELETE or IS_EMPTY */
 	/* The whole block has been searched or ENTER has a free slot. */
 	if (e_hit) break;	/* e_hit set if ENTER can be performed now */
 	assert(lmfs_dev(bp) != NO_DEV);
-	put_block(bp, DIRECTORY_BLOCK);	/* otherwise, continue searching dir */
+	put_block(bp);		/* otherwise, continue searching dir */
   }
 
   /* The whole directory has now been searched. */
@@ -231,7 +231,7 @@ int flag;			 /* LOOK_UP, ENTER, DELETE or IS_EMPTY */
   sp = ldir_ptr->i_sp; 
   dp->mfs_d_ino = conv4(sp->s_native, (int) *numb);
   MARKDIRTY(bp);
-  put_block(bp, DIRECTORY_BLOCK);
+  put_block(bp);
   ldir_ptr->i_update |= CTIME | MTIME;	/* mark mtime for update later */
   IN_MARKDIRTY(ldir_ptr);
   if (new_slots > old_slots) {
diff --git a/minix/fs/mfs/proto.h b/minix/fs/mfs/proto.h
index b19663817..10f6707dc 100644
--- a/minix/fs/mfs/proto.h
+++ b/minix/fs/mfs/proto.h
@@ -3,7 +3,7 @@
 
 /* Some shortcuts to functions in -lminixfs */
 #define get_block(d, b, t) lmfs_get_block(d, b, t)
-#define put_block(b, t) lmfs_put_block(b, t)
+#define put_block(b) lmfs_put_block(b)
 
 /* Function prototypes. */
 
diff --git a/minix/fs/mfs/read.c b/minix/fs/mfs/read.c
index 5b2d4acca..f5bdf149d 100644
--- a/minix/fs/mfs/read.c
+++ b/minix/fs/mfs/read.c
@@ -6,6 +6,7 @@
 #include "inode.h"
 #include "super.h"
 #include <sys/param.h>
+#include <sys/dirent.h>
 #include <assert.h>
 
 
@@ -203,8 +204,7 @@ int *completed;			/* number of bytes copied */
 	MARKDIRTY(bp);
   }
   
-  n = (off + chunk == block_size ? FULL_DATA_BLOCK : PARTIAL_DATA_BLOCK);
-  put_block(bp, n);
+  put_block(bp);
 
   return(r);
 }
@@ -269,7 +269,7 @@ int opportunistic;		/* if nonzero, only use cache for metadata */
 	ASSERT(lmfs_dev(bp) != NO_DEV);
 	ASSERT(lmfs_dev(bp) == rip->i_dev);
 	z = rd_indir(bp, index);		/* z= zone for single*/
-	put_block(bp, INDIRECT_BLOCK);		/* release double ind block */
+	put_block(bp);				/* release double ind block */
 	excess = excess % nr_indirects;		/* index into single ind blk */
   }
 
@@ -280,7 +280,7 @@ int opportunistic;		/* if nonzero, only use cache for metadata */
   if (bp == NULL)
 	return NO_BLOCK;			/* peeking failed */
   z = rd_indir(bp, (int) excess);		/* get block pointed to */
-  put_block(bp, INDIRECT_BLOCK);		/* release single indir blk */
+  put_block(bp);				/* release single indir blk */
   if (z == NO_ZONE) return(NO_BLOCK);
   b = (block_t) ((z << scale) + boff);
   return(b);
@@ -452,7 +452,7 @@ unsigned bytes_ahead;		/* bytes beyond position for immediate use */
 	assert(bp->lmfs_count > 0);
 	if (lmfs_dev(bp) != NO_DEV) {
 		/* Oops, block already in the cache, get out. */
-		put_block(bp, FULL_DATA_BLOCK);
+		put_block(bp);
 		break;
 	}
   }
@@ -554,7 +554,7 @@ ssize_t fs_getdents(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
 		}
 	}
 
-	put_block(bp, DIRECTORY_BLOCK);
+	put_block(bp);
 	if (done)
 		break;
   }
diff --git a/minix/fs/mfs/stadir.c b/minix/fs/mfs/stadir.c
index 2d161cdbd..765e0ea87 100644
--- a/minix/fs/mfs/stadir.c
+++ b/minix/fs/mfs/stadir.c
@@ -84,13 +84,12 @@ int fs_statvfs(struct statvfs *st)
 {
   struct super_block *sp;
   int scale;
-  u64_t used;
 
   sp = get_super(fs_dev);
 
   scale = sp->s_log_zone_size;
 
-  fs_blockstats(&st->f_blocks, &st->f_bfree, &used);
+  fs_blockstats(&st->f_blocks, &st->f_bfree);
   st->f_bavail = st->f_bfree;
 
   st->f_bsize = sp->s_block_size << scale;
diff --git a/minix/fs/mfs/stats.c b/minix/fs/mfs/stats.c
index 7cf9fb83f..d45b92c3f 100644
--- a/minix/fs/mfs/stats.c
+++ b/minix/fs/mfs/stats.c
@@ -81,18 +81,18 @@ int map;			/* IMAP (inode map) or ZMAP (zone map) */
 
       if (b >= map_bits) break;
     }
-    put_block(bp, MAP_BLOCK);
+    put_block(bp);
     ++block;
     word = 0;
   } while (--bcount > 0);
-  return free_bits;        /* no bit could be allocated */
+  return free_bits;
 }
 
 
 /*===========================================================================*
  *				blockstats				     *
  *===========================================================================*/
-void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used)
+void fs_blockstats(u64_t *blocks, u64_t *free)
 {
   struct super_block *sp;
 
@@ -102,8 +102,7 @@ void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used)
   assert(!sp->s_log_zone_size);
 
   *blocks = sp->s_zones;
-  *used = get_used_blocks(sp);
-  *free = *blocks - *used;
+  *free = *blocks - get_used_blocks(sp);
 
   return;
 }
diff --git a/minix/fs/mfs/super.c b/minix/fs/mfs/super.c
index 68543a4b3..f50df8425 100644
--- a/minix/fs/mfs/super.c
+++ b/minix/fs/mfs/super.c
@@ -93,14 +93,14 @@ bit_t origin;			/* number of bit to start searching at */
 		k |= 1 << i;
 		*wptr = (bitchunk_t) conv4(sp->s_native, (int) k);
 		MARKDIRTY(bp);
-		put_block(bp, MAP_BLOCK);
+		put_block(bp);
 		if(map == ZMAP) {
 			used_blocks++;
-			lmfs_blockschange(sp->s_dev, 1);
+			lmfs_blockschange(1);
 		}
 		return(b);
 	}
-	put_block(bp, MAP_BLOCK);
+	put_block(bp);
 	if (++block >= (unsigned int) bit_blocks) /* last block, wrap around */
 		block = 0;
 	word = 0;
@@ -150,11 +150,11 @@ bit_t bit_returned;		/* number of bit to insert into the map */
   b_bitmap(bp)[word] = (bitchunk_t) conv4(sp->s_native, (int) k);
   MARKDIRTY(bp);
 
-  put_block(bp, MAP_BLOCK);
+  put_block(bp);
 
   if(map == ZMAP) {
 	used_blocks--;
-	lmfs_blockschange(sp->s_dev, -1);
+	lmfs_blockschange(-1);
   }
 }
 
@@ -238,7 +238,7 @@ static int rw_super(struct super_block *sp, int writing)
   	sp->s_dev = save_dev;
   }
 
-  put_block(bp, FULL_DATA_BLOCK);
+  put_block(bp);
   lmfs_flushall();
 
   return OK;
diff --git a/minix/fs/mfs/write.c b/minix/fs/mfs/write.c
index 3a87dd56f..0d27266e6 100644
--- a/minix/fs/mfs/write.c
+++ b/minix/fs/mfs/write.c
@@ -125,7 +125,7 @@ int op;				/* special actions */
 	if (bp_dindir != NULL) MARKDIRTY(bp_dindir);
 	if (z1 == NO_ZONE) {
 		/* Release dbl indirect blk. */
-		put_block(bp_dindir, INDIRECT_BLOCK);
+		put_block(bp_dindir);
 		return(err_code);	/* couldn't create single ind */
 	}
   }
@@ -166,7 +166,7 @@ int op;				/* special actions */
 	}
 	/* z1 equals NO_ZONE only when we are freeing up the indirect block. */
 	if(z1 != NO_ZONE) MARKDIRTY(bp);
-	put_block(bp, INDIRECT_BLOCK);
+	put_block(bp);
   }
 
   /* If the single indirect block isn't there (or was just freed),
@@ -179,7 +179,7 @@ int op;				/* special actions */
 	rip->i_zone[zones+1] = NO_ZONE;
   }
 
-  put_block(bp_dindir, INDIRECT_BLOCK);	/* release double indirect blk */
+  put_block(bp_dindir);			/* release double indirect blk */
 
   return(OK);
 }
@@ -311,9 +311,8 @@ void zero_block(bp)
 register struct buf *bp;	/* pointer to buffer to zero */
 {
 /* Zero a block. */
-  ASSERT(lmfs_bytes(bp) > 0);
   ASSERT(bp->data);
-  memset(b_data(bp), 0, (size_t) lmfs_bytes(bp));
+  memset(b_data(bp), 0, lmfs_fs_block_size());
   MARKDIRTY(bp);
 }
 
diff --git a/minix/include/minix/libminixfs.h b/minix/include/minix/libminixfs.h
index badaf5a0f..e6094515a 100644
--- a/minix/include/minix/libminixfs.h
+++ b/minix/include/minix/libminixfs.h
@@ -31,31 +31,30 @@ void lmfs_markdirty(struct buf *bp);
 void lmfs_markclean(struct buf *bp);
 int lmfs_isclean(struct buf *bp);
 dev_t lmfs_dev(struct buf *bp);
-int lmfs_bytes(struct buf *bp);
 int lmfs_bufs_in_use(void);
 int lmfs_nr_bufs(void);
 void lmfs_flushall(void);
 void lmfs_flushdev(dev_t dev);
 int lmfs_fs_block_size(void);
-void lmfs_may_use_vmcache(int); 
-void lmfs_set_blocksize(int blocksize, int major); 
-void lmfs_reset_rdwt_err(void); 
-int lmfs_rdwt_err(void); 
+void lmfs_may_use_vmcache(int);
+void lmfs_set_blocksize(int blocksize);
+void lmfs_reset_rdwt_err(void);
+int lmfs_rdwt_err(void);
 void lmfs_buf_pool(int new_nr_bufs);
 struct buf *lmfs_get_block(dev_t dev, block64_t block, int how);
 struct buf *lmfs_get_block_ino(dev_t dev, block64_t block, int how, ino_t ino,
 	u64_t off);
-void lmfs_put_block(struct buf *bp, int block_type);
+void lmfs_put_block(struct buf *bp);
 void lmfs_free_block(dev_t dev, block64_t block);
 void lmfs_zero_block_ino(dev_t dev, ino_t ino, u64_t off);
 void lmfs_invalidate(dev_t device);
 void lmfs_rw_scattered(dev_t, struct buf **, int, int);
 void lmfs_setquiet(int q);
-void lmfs_cache_reevaluate(dev_t dev);
-void lmfs_blockschange(dev_t dev, int delta);
+void lmfs_cache_reevaluate(void);
+void lmfs_blockschange(int delta);
 
 /* calls that libminixfs does into fs */
-void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used);
+void fs_blockstats(u64_t *blocks, u64_t *free);
 
 /* get_block arguments */
 #define NORMAL             0    /* forces get_block to do disk read */
@@ -63,16 +62,6 @@ void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used);
 #define PREFETCH           2    /* tells get_block not to read or mark dev */
 #define PEEK               3    /* returns NULL if not in cache or VM cache */
 
-/* When a block is released, the type of usage is passed to put_block(). */
-#define ONE_SHOT      0200 /* set if block not likely to be needed soon */
-
-#define INODE_BLOCK        0                             /* inode block */
-#define DIRECTORY_BLOCK    1                             /* directory block */
-#define INDIRECT_BLOCK     2                             /* pointer block */
-#define MAP_BLOCK          3                             /* bit map */
-#define FULL_DATA_BLOCK    5                             /* data, fully used */
-#define PARTIAL_DATA_BLOCK 6                             /* data, partly used*/
-
 #define END_OF_FILE   (-104)        /* eof detected */
 
 /* Block I/O helper functions. */
diff --git a/minix/lib/libminixfs/bio.c b/minix/lib/libminixfs/bio.c
index 8f0b72aa4..b9b892d8f 100644
--- a/minix/lib/libminixfs/bio.c
+++ b/minix/lib/libminixfs/bio.c
@@ -66,7 +66,7 @@ block_prefetch(dev_t dev, block64_t block, unsigned int nblocks)
 		assert(bp != NULL);
 
 		if (lmfs_dev(bp) != NO_DEV) {
-			lmfs_put_block(bp, FULL_DATA_BLOCK);
+			lmfs_put_block(bp);
 
 			break;
 		}
@@ -175,7 +175,7 @@ lmfs_bio(dev_t dev, struct fsdriver_data * data, size_t bytes, off_t pos,
 				    (char *)bp->data + block_off, chunk);
 		}
 
-		lmfs_put_block(bp, FULL_DATA_BLOCK);
+		lmfs_put_block(bp);
 
 		if (r != OK)
 			break;
diff --git a/minix/lib/libminixfs/cache.c b/minix/lib/libminixfs/cache.c
index b4b5e180c..3b1aa0dce 100644
--- a/minix/lib/libminixfs/cache.c
+++ b/minix/lib/libminixfs/cache.c
@@ -18,6 +18,22 @@
 #include <minix/u64.h>
 #include <minix/bdev.h>
 
+/* Buffer (block) cache.  To acquire a block, a routine calls lmfs_get_block(),
+ * telling which block it wants.  The block is then regarded as "in use" and
+ * has its reference count incremented.  All the blocks that are not in use are
+ * chained together in an LRU list, with 'front' pointing to the least recently
+ * used block, and 'rear' to the most recently used block.  A reverse chain is
+ * also maintained.  Usage for LRU is measured by the time the put_block() is
+ * done.  The second parameter to put_block() can violate the LRU order and put
+ * a block on the front of the list, if it will probably not be needed again.
+ * This is used internally only; the lmfs_put_block() API call has no second
+ * parameter.  If a block is modified, the modifying routine must mark the
+ * block as dirty, so the block will eventually be rewritten to the disk.
+ */
+
+/* Flags to put_block(). */
+#define ONE_SHOT      0x1	/* set if block will not be needed again */
+
 #define BUFHASH(b) ((unsigned int)((b) % nr_bufs))
 #define MARKCLEAN  lmfs_markclean
 
@@ -30,7 +46,8 @@ static unsigned int bufs_in_use;/* # bufs currently in use (not on free list)*/
 static void rm_lru(struct buf *bp);
 static void read_block(struct buf *);
 static void freeblock(struct buf *bp);
-static void cache_heuristic_check(int major);
+static void cache_heuristic_check(void);
+static void put_block(struct buf *bp, int put_flags);
 
 static int vmcache = 0; /* are we using vm's secondary cache? (initially not) */
 
@@ -48,7 +65,7 @@ static int quiet = 0;
 void lmfs_setquiet(int q) { quiet = q; }
 
 static u32_t fs_bufs_heuristic(int minbufs, u32_t btotal, u64_t bfree, 
-         int blocksize, dev_t majordev)
+         int blocksize)
 {
   struct vm_stats_info vsi;
   int bufs;
@@ -96,7 +113,7 @@ static u32_t fs_bufs_heuristic(int minbufs, u32_t btotal, u64_t bfree,
   return bufs;
 }
 
-void lmfs_blockschange(dev_t dev, int delta)
+void lmfs_blockschange(int delta)
 {
         /* Change the number of allocated blocks by 'delta.'
          * Also accumulate the delta since the last cache re-evaluation.
@@ -108,7 +125,7 @@ void lmfs_blockschange(dev_t dev, int delta)
 #define BANDKB (10*1024)	/* recheck cache every 10MB change */
         if(bitdelta*(int)fs_block_size/1024 > BANDKB ||
 	   bitdelta*(int)fs_block_size/1024 < -BANDKB) {
-                lmfs_cache_reevaluate(dev);
+                lmfs_cache_reevaluate();
                 bitdelta = 0;
         }
 }
@@ -133,11 +150,6 @@ dev_t lmfs_dev(struct buf *bp)
 	return bp->lmfs_dev;
 }
 
-int lmfs_bytes(struct buf *bp)
-{
-	return bp->lmfs_bytes;
-}
-
 static void free_unused_blocks(void)
 {
 	struct buf *bp;
@@ -414,7 +426,7 @@ struct buf *lmfs_get_block_ino(dev_t dev, block64_t block, int how, ino_t ino,
   if (how == PEEK) {
 	bp->lmfs_dev = NO_DEV;
 
-	lmfs_put_block(bp, ONE_SHOT);
+	put_block(bp, ONE_SHOT);
 
 	return NULL;
   }
@@ -441,26 +453,20 @@ struct buf *lmfs_get_block_ino(dev_t dev, block64_t block, int how, ino_t ino,
 }
 
 /*===========================================================================*
- *				lmfs_put_block				     *
+ *				put_block				     *
  *===========================================================================*/
-void lmfs_put_block(
-  struct buf *bp,	/* pointer to the buffer to be released */
-  int block_type 	/* INODE_BLOCK, DIRECTORY_BLOCK, or whatever */
-)
+static void put_block(struct buf *bp, int put_flags)
 {
-/* Return a block to the list of available blocks.   Depending on 'block_type'
+/* Return a block to the list of available blocks.   Depending on 'put_flags'
  * it may be put on the front or rear of the LRU chain.  Blocks that are
- * expected to be needed again shortly (e.g., partially full data blocks)
- * go on the rear; blocks that are unlikely to be needed again shortly
- * (e.g., full data blocks) go on the front.  Blocks whose loss can hurt
- * the integrity of the file system (e.g., inode blocks) are written to
- * disk immediately if they are dirty.
+ * expected to be needed again at some point go on the rear; blocks that are
+ * unlikely to be needed again at all go on the front.
  */
   dev_t dev;
   uint64_t dev_off;
   int r, setflags;
 
-  if (bp == NULL) return;	/* it is easier to check here than in caller */
+  assert(bp != NULL);
 
   dev = bp->lmfs_dev;
 
@@ -470,8 +476,8 @@ void lmfs_put_block(
   if (bp->lmfs_count != 0) return;	/* block is still in use */
 
   /* Put this block back on the LRU chain.  */
-  if (dev == NO_DEV || dev == DEV_RAM || (block_type & ONE_SHOT)) {
-	/* Block probably won't be needed quickly. Put it on front of chain.
+  if (dev == NO_DEV || dev == DEV_RAM || (put_flags & ONE_SHOT)) {
+	/* Block will not be needed again. Put it on front of chain.
   	 * It will be the next block to be evicted from the cache.
   	 */
 	bp->lmfs_prev = NULL;
@@ -483,7 +489,7 @@ void lmfs_put_block(
 	front = bp;
   } 
   else {
-	/* Block probably will be needed quickly.  Put it on rear of chain.
+	/* Block may be needed again.  Put it on rear of chain.
   	 * It will not be evicted from the cache for a long time.
   	 */
 	bp->lmfs_prev = rear;
@@ -502,7 +508,7 @@ void lmfs_put_block(
   if(vmcache && bp->lmfs_needsetcache && dev != NO_DEV) {
 	assert(bp->data);
 
-	setflags = (block_type & ONE_SHOT) ? VMSF_ONCE : 0;
+	setflags = (put_flags & ONE_SHOT) ? VMSF_ONCE : 0;
 	if ((r = vm_set_cacheblock(bp->data, dev, dev_off, bp->lmfs_inode,
 	    bp->lmfs_inode_offset, &bp->lmfs_flags, fs_block_size,
 	    setflags)) != OK) {
@@ -522,10 +528,22 @@ void lmfs_put_block(
    * after, which could be a problem if VM already forgot the block and we are
    * expected to pass it to VM again, which then wouldn't happen.
    */
-  if (block_type & ONE_SHOT)
+  if (put_flags & ONE_SHOT)
 	bp->lmfs_dev = NO_DEV;
 }
 
+/*===========================================================================*
+ *				lmfs_put_block				     *
+ *===========================================================================*/
+void lmfs_put_block(struct buf *bp)
+{
+/* User interface to put_block(). */
+
+  if (bp == NULL) return;	/* for poorly written file systems */
+
+  put_block(bp, 0);
+}
+
 /*===========================================================================*
  *				lmfs_free_block				     *
  *===========================================================================*/
@@ -621,14 +639,14 @@ void lmfs_zero_block_ino(dev_t dev, ino_t ino, u64_t ino_off)
    * TODO: tell VM that it is an all-zeroes block, so that VM can deduplicate
    * all such pages in its cache.
    */
-  lmfs_put_block(bp, ONE_SHOT);
+  put_block(bp, ONE_SHOT);
 }
 
-void lmfs_cache_reevaluate(dev_t dev)
+void lmfs_cache_reevaluate(void)
 {
-  if(bufs_in_use == 0 && dev != NO_DEV) {
+  if (bufs_in_use == 0) {
 	/* if the cache isn't in use any more, we could resize it. */
-	cache_heuristic_check(major(dev));
+	cache_heuristic_check();
   }
 }
 
@@ -876,7 +894,7 @@ void lmfs_rw_scattered(
 		}
 		if (rw_flag == READING) {
 			bp->lmfs_dev = dev;	/* validate block */
-			lmfs_put_block(bp, PARTIAL_DATA_BLOCK);
+			lmfs_put_block(bp);
 		} else {
 			MARKCLEAN(bp);
 		}
@@ -891,7 +909,7 @@ void lmfs_rw_scattered(
 		 * give at this time.  Don't forget to release those extras.
 		 */
 		while (bufqsize > 0) {
-			lmfs_put_block(*bufq++, PARTIAL_DATA_BLOCK);
+			lmfs_put_block(*bufq++);
 			bufqsize--;
 		}
 	}
@@ -952,15 +970,14 @@ static void cache_resize(unsigned int blocksize, unsigned int bufs)
   fs_block_size = blocksize;
 }
 
-static void cache_heuristic_check(int major)
+static void cache_heuristic_check(void)
 {
   int bufs, d;
-  u64_t btotal, bfree, bused;
+  u64_t btotal, bfree;
 
-  fs_blockstats(&btotal, &bfree, &bused);
+  fs_blockstats(&btotal, &bfree);
 
-  bufs = fs_bufs_heuristic(10, btotal, bfree,
-        fs_block_size, major);
+  bufs = fs_bufs_heuristic(10, btotal, bfree, fs_block_size);
 
   /* set the cache to the new heuristic size if the new one
    * is more than 10% off from the current one.
@@ -975,16 +992,14 @@ static void cache_heuristic_check(int major)
 /*===========================================================================*
  *			lmfs_set_blocksize				     *
  *===========================================================================*/
-void lmfs_set_blocksize(int new_block_size, int major)
+void lmfs_set_blocksize(int new_block_size)
 {
   cache_resize(new_block_size, MINBUFS);
-  cache_heuristic_check(major);
+  cache_heuristic_check();
   
   /* Decide whether to use seconday cache or not.
-   * Only do this if
-   *	- it's available, and
-   *	- use of it hasn't been disabled for this fs, and
-   *	- our main FS device isn't a memory device
+   * Only do this if the block size is a multiple of the page size, and using
+   * the VM cache has been enabled for this FS.
    */
 
   vmcache = 0;
diff --git a/minix/lib/libminixfs/minixfs.h b/minix/lib/libminixfs/minixfs.h
deleted file mode 100644
index 30d70b98a..000000000
--- a/minix/lib/libminixfs/minixfs.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#define _SYSTEM
-
-#include <lib.h>		/* common to all libraries */
-#include <minix/com.h>		/* need task numbers + message types */
diff --git a/minix/tests/test72.c b/minix/tests/test72.c
index 9e13f16dc..70552a1c7 100644
--- a/minix/tests/test72.c
+++ b/minix/tests/test72.c
@@ -53,7 +53,7 @@ dowriteblock(int b, int blocksize, u32_t seed, char *data)
 
 	lmfs_markdirty(bp);
 
-	lmfs_put_block(bp, FULL_DATA_BLOCK);
+	lmfs_put_block(bp);
 
 	return blocksize;
 }
@@ -72,7 +72,7 @@ readblock(int b, int blocksize, u32_t seed, char *data)
 
 	memcpy(data, bp->data, blocksize);
 
-	lmfs_put_block(bp, FULL_DATA_BLOCK);
+	lmfs_put_block(bp);
 
 	return blocksize;
 }
@@ -91,9 +91,9 @@ void testend(void)
 /* Fake some libminixfs client functions */
 
 void
-fs_blockstats(u64_t *total, u64_t *free, u64_t *used)
+fs_blockstats(u64_t *total, u64_t *free)
 {
-	*total = *free = *used = 0;
+	*total = *free = 0;
 }
 
 static void allocate(int b)
@@ -269,7 +269,7 @@ main(int argc, char *argv[])
 	for(p = 1; p <= 3; p++) {
 		/* Do not update curblocksize until the cache is flushed. */
 		newblocksize = PAGE_SIZE*p;
-		lmfs_set_blocksize(newblocksize, MYMAJOR);
+		lmfs_set_blocksize(newblocksize);
 		curblocksize = newblocksize;	/* now it's safe to update */
 		lmfs_buf_pool(BLOCKS);
 		if(dotest(curblocksize, BLOCKS, ITER)) e(n);
@@ -282,7 +282,7 @@ main(int argc, char *argv[])
 	for(wss = 2; wss <= 3; wss++) {
 		int wsblocks = 10*wss*wss*wss*wss*wss;
 		for(cs = wsblocks/4; cs <= wsblocks*3; cs *= 1.5) {
-			lmfs_set_blocksize(PAGE_SIZE, MYMAJOR);
+			lmfs_set_blocksize(PAGE_SIZE);
 			curblocksize = PAGE_SIZE;	/* same as above */
 			lmfs_buf_pool(cs);
 		        if(dotest(curblocksize, wsblocks, ITER)) e(n);