Merge git://git.infradead.org/mtd-2.6

* git://git.infradead.org/mtd-2.6: (82 commits)
  [MTD] m25p80: Add Support for ATMEL AT25DF641 64-Megabit SPI Flash
  [MTD] m25p80: add FAST_READ access support to M25Pxx
  [MTD] [NAND] bf5xx_nand: Avoid crash if bfin_mac is installed.
  [MTD] [NAND] at91_nand: control NCE signal
  [MTD] [NAND] AT91 hardware ECC compile fix for at91sam9263 / at91sam9260
  [MTD] [NAND] Hardware ECC controller on at91sam9263 / at91sam9260
  [JFFS2] Introduce dbg_readinode2 log level, use it to shut read_dnode() up
  [JFFS2] Fix jffs2_reserve_space() when all blocks are pending erasure.
  [JFFS2] Add erase_checking_list to hold blocks being marked.
  UBI: add a message
  [JFFS2] Return values of jffs2_block_check_erase error paths
  [MTD] Clean up AR7 partition map support
  [MTD] [NOR] Fix Intel CFI driver for collie flash
  [JFFS2] Finally remove redundant ref->__totlen field.
  [JFFS2] Honour TEST_TOTLEN macro in debugging code. ref->__totlen is going!
  [JFFS2] Add paranoia debugging for superblock counts
  [JFFS2] Fix free space leak with in-band cleanmarkers
  [JFFS2] Self-sufficient #includes in jffs2_fs_i.h: include <linux/mutex.h>
  [MTD] [NAND] Verify probe by retrying to checking the results match
  [MTD] [NAND] S3C2410 Allow ECC disable to be specified by the board
  ...

18 files changed, 399 insertions, 202 deletions

diff --git a/fs/jffs2/README.Locking b/fs/jffs2/README.Locking
index d14d5a4dc5ac..3ea36554107f 100644
--- a/fs/jffs2/README.Locking
+++ b/fs/jffs2/README.Locking
@@ -14,7 +14,7 @@ be fairly close.
         alloc_sem
         ---------
 
-The alloc_sem is a per-filesystem semaphore, used primarily to ensure
+The alloc_sem is a per-filesystem mutex, used primarily to ensure
 contiguous allocation of space on the medium. It is automatically
 obtained during space allocations (jffs2_reserve_space()) and freed
 upon write completion (jffs2_complete_reservation()). Note that
@@ -41,10 +41,10 @@ if the wbuf is currently holding any data is permitted, though.
 Ordering constraints: See f->sem.
 
 
-        File Semaphore f->sem
+        File Mutex f->sem
         ---------------------
 
-This is the JFFS2-internal equivalent of the inode semaphore i->i_sem.
+This is the JFFS2-internal equivalent of the inode mutex i->i_sem.
 It protects the contents of the jffs2_inode_info private inode data,
 including the linked list of node fragments (but see the notes below on
 erase_completion_lock), etc.
@@ -60,14 +60,14 @@ lead to deadlock, unless we played games with unlocking the i_sem
 before calling the space allocation functions.
 
 Instead of playing such games, we just have an extra internal
-semaphore, which is obtained by the garbage collection code and also
+mutex, which is obtained by the garbage collection code and also
 by the normal file system code _after_ allocation of space.
 
 Ordering constraints: 
 
         1. Never attempt to allocate space or lock alloc_sem with 
            any f->sem held.
-        2. Never attempt to lock two file semaphores in one thread.
+        2. Never attempt to lock two file mutexes in one thread.
            No ordering rules have been made for doing so.
 
 
@@ -86,8 +86,8 @@ a simple spin_lock() rather than spin_lock_bh().
 
 Note that the per-inode list of physical nodes (f->nodes) is a special
 case. Any changes to _valid_ nodes (i.e. ->flash_offset & 1 == 0) in
-the list are protected by the file semaphore f->sem. But the erase
-code may remove _obsolete_ nodes from the list while holding only the
+the list are protected by the file mutex f->sem. But the erase code
+may remove _obsolete_ nodes from the list while holding only the
 erase_completion_lock. So you can walk the list only while holding the
 erase_completion_lock, and can drop the lock temporarily mid-walk as
 long as the pointer you're holding is to a _valid_ node, not an
@@ -124,10 +124,10 @@ Ordering constraints:
         erase_free_sem
         --------------
 
-This semaphore is only used by the erase code which frees obsolete
-node references and the jffs2_garbage_collect_deletion_dirent()
-function. The latter function on NAND flash must read _obsolete_ nodes
-to determine whether the 'deletion dirent' under consideration can be
+This mutex is only used by the erase code which frees obsolete node
+references and the jffs2_garbage_collect_deletion_dirent() function.
+The latter function on NAND flash must read _obsolete_ nodes to
+determine whether the 'deletion dirent' under consideration can be
 discarded or whether it is still required to show that an inode has
 been unlinked. Because reading from the flash may sleep, the
 erase_completion_lock cannot be held, so an alternative, more
diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c
index 722a6b682951..d58f845ccb85 100644
--- a/fs/jffs2/build.c
+++ b/fs/jffs2/build.c
@@ -345,6 +345,7 @@ int jffs2_do_mount_fs(struct jffs2_sb_info *c)
         INIT_LIST_HEAD(&c->dirty_list);
         INIT_LIST_HEAD(&c->erasable_list);
         INIT_LIST_HEAD(&c->erasing_list);
+        INIT_LIST_HEAD(&c->erase_checking_list);
         INIT_LIST_HEAD(&c->erase_pending_list);
         INIT_LIST_HEAD(&c->erasable_pending_wbuf_list);
         INIT_LIST_HEAD(&c->erase_complete_list);
diff --git a/fs/jffs2/debug.c b/fs/jffs2/debug.c
index 3a32c64ed497..5544d31c066b 100644
--- a/fs/jffs2/debug.c
+++ b/fs/jffs2/debug.c
@@ -62,9 +62,9 @@ __jffs2_dbg_acct_sanity_check(struct jffs2_sb_info *c,
 void
 __jffs2_dbg_fragtree_paranoia_check(struct jffs2_inode_info *f)
 {
-        down(&f->sem);
+        mutex_lock(&f->sem);
         __jffs2_dbg_fragtree_paranoia_check_nolock(f);
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 }
 
 void
@@ -153,6 +153,139 @@ __jffs2_dbg_prewrite_paranoia_check(struct jffs2_sb_info *c,
         kfree(buf);
 }
 
+void __jffs2_dbg_superblock_counts(struct jffs2_sb_info *c)
+{
+        struct jffs2_eraseblock *jeb;
+        uint32_t free = 0, dirty = 0, used = 0, wasted = 0,
+                erasing = 0, bad = 0, unchecked = 0;
+        int nr_counted = 0;
+        int dump = 0;
+
+        if (c->gcblock) {
+                nr_counted++;
+                free += c->gcblock->free_size;
+                dirty += c->gcblock->dirty_size;
+                used += c->gcblock->used_size;
+                wasted += c->gcblock->wasted_size;
+                unchecked += c->gcblock->unchecked_size;
+        }
+        if (c->nextblock) {
+                nr_counted++;
+                free += c->nextblock->free_size;
+                dirty += c->nextblock->dirty_size;
+                used += c->nextblock->used_size;
+                wasted += c->nextblock->wasted_size;
+                unchecked += c->nextblock->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->clean_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->very_dirty_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->dirty_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->erasable_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->erasable_pending_wbuf_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->erase_pending_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->free_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+        list_for_each_entry(jeb, &c->bad_used_list, list) {
+                nr_counted++;
+                free += jeb->free_size;
+                dirty += jeb->dirty_size;
+                used += jeb->used_size;
+                wasted += jeb->wasted_size;
+                unchecked += jeb->unchecked_size;
+        }
+
+        list_for_each_entry(jeb, &c->erasing_list, list) {
+                nr_counted++;
+                erasing += c->sector_size;
+        }
+        list_for_each_entry(jeb, &c->erase_checking_list, list) {
+                nr_counted++;
+                erasing += c->sector_size;
+        }
+        list_for_each_entry(jeb, &c->erase_complete_list, list) {
+                nr_counted++;
+                erasing += c->sector_size;
+        }
+        list_for_each_entry(jeb, &c->bad_list, list) {
+                nr_counted++;
+                bad += c->sector_size;
+        }
+
+#define check(sz) \
+        if (sz != c->sz##_size) {                       \
+                printk(KERN_WARNING #sz "_size mismatch counted 0x%x, c->" #sz "_size 0x%x\n", \
+                       sz, c->sz##_size);               \
+                dump = 1;                               \
+        }
+        check(free);
+        check(dirty);
+        check(used);
+        check(wasted);
+        check(unchecked);
+        check(bad);
+        check(erasing);
+#undef check
+
+        if (nr_counted != c->nr_blocks) {
+                printk(KERN_WARNING "%s counted only 0x%x blocks of 0x%x. Where are the others?\n",
+                       __func__, nr_counted, c->nr_blocks);
+                dump = 1;
+        }
+
+        if (dump) {
+                __jffs2_dbg_dump_block_lists_nolock(c);
+                BUG();
+        }
+}
+
 /*
  * Check the space accounting and node_ref list correctness for the JFFS2 erasable block 'jeb'.
  */
@@ -229,6 +362,9 @@ __jffs2_dbg_acct_paranoia_check_nolock(struct jffs2_sb_info *c,
         }
 #endif
 
+        if (!(c->flags & (JFFS2_SB_FLAG_BUILDING|JFFS2_SB_FLAG_SCANNING)))
+                __jffs2_dbg_superblock_counts(c);
+
         return;
 
 error:
@@ -268,7 +404,10 @@ __jffs2_dbg_dump_node_refs_nolock(struct jffs2_sb_info *c,
 
         printk(JFFS2_DBG);
         for (ref = jeb->first_node; ; ref = ref_next(ref)) {
-                printk("%#08x(%#x)", ref_offset(ref), ref->__totlen);
+                printk("%#08x", ref_offset(ref));
+#ifdef TEST_TOTLEN
+                printk("(%x)", ref->__totlen);
+#endif
                 if (ref_next(ref))
                         printk("->");
                 else
@@ -447,6 +586,21 @@ __jffs2_dbg_dump_block_lists_nolock(struct jffs2_sb_info *c)
                         }
                 }
         }
+        if (list_empty(&c->erase_checking_list)) {
+                printk(JFFS2_DBG "erase_checking_list: empty\n");
+        } else {
+                struct list_head *this;
+
+                list_for_each(this, &c->erase_checking_list) {
+                        struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
+
+                        if (!(jeb->used_size == 0 && jeb->dirty_size == 0 && jeb->wasted_size == 0)) {
+                                printk(JFFS2_DBG "erase_checking_list: %#08x (used %#08x, dirty %#08x, wasted %#08x, unchecked %#08x, free %#08x)\n",
+                                        jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size,
+                                        jeb->unchecked_size, jeb->free_size);
+                        }
+                }
+        }
 
         if (list_empty(&c->erase_pending_list)) {
                 printk(JFFS2_DBG "erase_pending_list: empty\n");
@@ -532,9 +686,9 @@ __jffs2_dbg_dump_block_lists_nolock(struct jffs2_sb_info *c)
 void
 __jffs2_dbg_dump_fragtree(struct jffs2_inode_info *f)
 {
-        down(&f->sem);
+        mutex_lock(&f->sem);
         jffs2_dbg_dump_fragtree_nolock(f);
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 }
 
 void
diff --git a/fs/jffs2/debug.h b/fs/jffs2/debug.h
index 4130adabd76e..9645275023e6 100644
--- a/fs/jffs2/debug.h
+++ b/fs/jffs2/debug.h
@@ -38,6 +38,7 @@
 
 #if CONFIG_JFFS2_FS_DEBUG > 1
 #define JFFS2_DBG_FRAGTREE2_MESSAGES
+#define JFFS2_DBG_READINODE2_MESSAGES
 #define JFFS2_DBG_MEMALLOC_MESSAGES
 #endif
 
@@ -115,6 +116,11 @@
 #else
 #define dbg_readinode(fmt, ...)
 #endif
+#ifdef JFFS2_DBG_READINODE2_MESSAGES
+#define dbg_readinode2(fmt, ...)        JFFS2_DEBUG(fmt, ##__VA_ARGS__)
+#else
+#define dbg_readinode2(fmt, ...)
+#endif
 
 /* Fragtree build debugging messages */
 #ifdef JFFS2_DBG_FRAGTREE_MESSAGES
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index f948f7e6ec82..c63e7a96af0d 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -86,7 +86,7 @@ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
         dir_f = JFFS2_INODE_INFO(dir_i);
         c = JFFS2_SB_INFO(dir_i->i_sb);
 
-        down(&dir_f->sem);
+        mutex_lock(&dir_f->sem);
 
         /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
         for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
@@ -99,7 +99,7 @@ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
         }
         if (fd)
                 ino = fd->ino;
-        up(&dir_f->sem);
+        mutex_unlock(&dir_f->sem);
         if (ino) {
                 inode = jffs2_iget(dir_i->i_sb, ino);
                 if (IS_ERR(inode)) {
@@ -146,7 +146,7 @@ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
         }
 
         curofs=1;
-        down(&f->sem);
+        mutex_lock(&f->sem);
         for (fd = f->dents; fd; fd = fd->next) {
 
                 curofs++;
@@ -166,7 +166,7 @@ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
                         break;
                 offset++;
         }
-        up(&f->sem);
+        mutex_unlock(&f->sem);
  out:
         filp->f_pos = offset;
         return 0;
@@ -275,9 +275,9 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
         ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
 
         if (!ret) {
-                down(&f->sem);
+                mutex_lock(&f->sem);
                 old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 d_instantiate(dentry, old_dentry->d_inode);
                 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
                 atomic_inc(&old_dentry->d_inode->i_count);
@@ -351,7 +351,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
 
         if (IS_ERR(fn)) {
                 /* Eeek. Wave bye bye */
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_complete_reservation(c);
                 jffs2_clear_inode(inode);
                 return PTR_ERR(fn);
@@ -361,7 +361,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
         f->target = kmalloc(targetlen + 1, GFP_KERNEL);
         if (!f->target) {
                 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_complete_reservation(c);
                 jffs2_clear_inode(inode);
                 return -ENOMEM;
@@ -374,7 +374,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
            obsoleted by the first data write
         */
         f->metadata = fn;
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 
         jffs2_complete_reservation(c);
 
@@ -406,7 +406,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
         }
 
         dir_f = JFFS2_INODE_INFO(dir_i);
-        down(&dir_f->sem);
+        mutex_lock(&dir_f->sem);
 
         rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
         rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -429,7 +429,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
                    as if it were the final unlink() */
                 jffs2_complete_reservation(c);
                 jffs2_free_raw_dirent(rd);
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
                 jffs2_clear_inode(inode);
                 return PTR_ERR(fd);
         }
@@ -442,7 +442,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
            one if necessary. */
         jffs2_add_fd_to_list(c, fd, &dir_f->dents);
 
-        up(&dir_f->sem);
+        mutex_unlock(&dir_f->sem);
         jffs2_complete_reservation(c);
 
         d_instantiate(dentry, inode);
@@ -507,7 +507,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
 
         if (IS_ERR(fn)) {
                 /* Eeek. Wave bye bye */
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_complete_reservation(c);
                 jffs2_clear_inode(inode);
                 return PTR_ERR(fn);
@@ -516,7 +516,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
            obsoleted by the first data write
         */
         f->metadata = fn;
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 
         jffs2_complete_reservation(c);
 
@@ -548,7 +548,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
         }
 
         dir_f = JFFS2_INODE_INFO(dir_i);
-        down(&dir_f->sem);
+        mutex_lock(&dir_f->sem);
 
         rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
         rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -571,7 +571,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
                    as if it were the final unlink() */
                 jffs2_complete_reservation(c);
                 jffs2_free_raw_dirent(rd);
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
                 jffs2_clear_inode(inode);
                 return PTR_ERR(fd);
         }
@@ -585,7 +585,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
            one if necessary. */
         jffs2_add_fd_to_list(c, fd, &dir_f->dents);
 
-        up(&dir_f->sem);
+        mutex_unlock(&dir_f->sem);
         jffs2_complete_reservation(c);
 
         d_instantiate(dentry, inode);
@@ -673,7 +673,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
 
         if (IS_ERR(fn)) {
                 /* Eeek. Wave bye bye */
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_complete_reservation(c);
                 jffs2_clear_inode(inode);
                 return PTR_ERR(fn);
@@ -682,7 +682,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
            obsoleted by the first data write
         */
         f->metadata = fn;
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 
         jffs2_complete_reservation(c);
 
@@ -714,7 +714,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
         }
 
         dir_f = JFFS2_INODE_INFO(dir_i);
-        down(&dir_f->sem);
+        mutex_lock(&dir_f->sem);
 
         rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
         rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -740,7 +740,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
                    as if it were the final unlink() */
                 jffs2_complete_reservation(c);
                 jffs2_free_raw_dirent(rd);
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
                 jffs2_clear_inode(inode);
                 return PTR_ERR(fd);
         }
@@ -753,7 +753,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
            one if necessary. */
         jffs2_add_fd_to_list(c, fd, &dir_f->dents);
 
-        up(&dir_f->sem);
+        mutex_unlock(&dir_f->sem);
         jffs2_complete_reservation(c);
 
         d_instantiate(dentry, inode);
@@ -780,14 +780,14 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
                 if (S_ISDIR(new_dentry->d_inode->i_mode)) {
                         struct jffs2_full_dirent *fd;
 
-                        down(&victim_f->sem);
+                        mutex_lock(&victim_f->sem);
                         for (fd = victim_f->dents; fd; fd = fd->next) {
                                 if (fd->ino) {
-                                        up(&victim_f->sem);
+                                        mutex_unlock(&victim_f->sem);
                                         return -ENOTEMPTY;
                                 }
                         }
-                        up(&victim_f->sem);
+                        mutex_unlock(&victim_f->sem);
                 }
         }
 
@@ -816,9 +816,9 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
                 /* Don't oops if the victim was a dirent pointing to an
                    inode which didn't exist. */
                 if (victim_f->inocache) {
-                        down(&victim_f->sem);
+                        mutex_lock(&victim_f->sem);
                         victim_f->inocache->nlink--;
-                        up(&victim_f->sem);
+                        mutex_unlock(&victim_f->sem);
                 }
         }
 
@@ -836,11 +836,11 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
         if (ret) {
                 /* Oh shit. We really ought to make a single node which can do both atomically */
                 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
-                down(&f->sem);
+                mutex_lock(&f->sem);
                 inc_nlink(old_dentry->d_inode);
                 if (f->inocache)
                         f->inocache->nlink++;
-                up(&f->sem);
+                mutex_unlock(&f->sem);
 
                 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
                 /* Might as well let the VFS know */
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index a1db9180633f..25a640e566d3 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -50,14 +50,14 @@ static void jffs2_erase_block(struct jffs2_sb_info *c,
         instr = kmalloc(sizeof(struct erase_info) + sizeof(struct erase_priv_struct), GFP_KERNEL);
         if (!instr) {
                 printk(KERN_WARNING "kmalloc for struct erase_info in jffs2_erase_block failed. Refiling block for later\n");
-                down(&c->erase_free_sem);
+                mutex_lock(&c->erase_free_sem);
                 spin_lock(&c->erase_completion_lock);
                 list_move(&jeb->list, &c->erase_pending_list);
                 c->erasing_size -= c->sector_size;
                 c->dirty_size += c->sector_size;
                 jeb->dirty_size = c->sector_size;
                 spin_unlock(&c->erase_completion_lock);
-                up(&c->erase_free_sem);
+                mutex_unlock(&c->erase_free_sem);
                 return;
         }
 
@@ -84,14 +84,14 @@ static void jffs2_erase_block(struct jffs2_sb_info *c,
         if (ret == -ENOMEM || ret == -EAGAIN) {
                 /* Erase failed immediately. Refile it on the list */
                 D1(printk(KERN_DEBUG "Erase at 0x%08x failed: %d. Refiling on erase_pending_list\n", jeb->offset, ret));
-                down(&c->erase_free_sem);
+                mutex_lock(&c->erase_free_sem);
                 spin_lock(&c->erase_completion_lock);
                 list_move(&jeb->list, &c->erase_pending_list);
                 c->erasing_size -= c->sector_size;
                 c->dirty_size += c->sector_size;
                 jeb->dirty_size = c->sector_size;
                 spin_unlock(&c->erase_completion_lock);
-                up(&c->erase_free_sem);
+                mutex_unlock(&c->erase_free_sem);
                 return;
         }
 
@@ -107,7 +107,7 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count)
 {
         struct jffs2_eraseblock *jeb;
 
-        down(&c->erase_free_sem);
+        mutex_lock(&c->erase_free_sem);
 
         spin_lock(&c->erase_completion_lock);
 
@@ -116,9 +116,9 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count)
 
                 if (!list_empty(&c->erase_complete_list)) {
                         jeb = list_entry(c->erase_complete_list.next, struct jffs2_eraseblock, list);
-                        list_del(&jeb->list);
+                        list_move(&jeb->list, &c->erase_checking_list);
                         spin_unlock(&c->erase_completion_lock);
-                        up(&c->erase_free_sem);
+                        mutex_unlock(&c->erase_free_sem);
                         jffs2_mark_erased_block(c, jeb);
 
                         if (!--count) {
@@ -139,7 +139,7 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count)
                         jffs2_free_jeb_node_refs(c, jeb);
                         list_add(&jeb->list, &c->erasing_list);
                         spin_unlock(&c->erase_completion_lock);
-                        up(&c->erase_free_sem);
+                        mutex_unlock(&c->erase_free_sem);
 
                         jffs2_erase_block(c, jeb);
 
@@ -149,12 +149,12 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count)
 
                 /* Be nice */
                 yield();
-                down(&c->erase_free_sem);
+                mutex_lock(&c->erase_free_sem);
                 spin_lock(&c->erase_completion_lock);
         }
 
         spin_unlock(&c->erase_completion_lock);
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
  done:
         D1(printk(KERN_DEBUG "jffs2_erase_pending_blocks completed\n"));
 }
@@ -162,11 +162,11 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count)
 static void jffs2_erase_succeeded(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
 {
         D1(printk(KERN_DEBUG "Erase completed successfully at 0x%08x\n", jeb->offset));
-        down(&c->erase_free_sem);
+        mutex_lock(&c->erase_free_sem);
         spin_lock(&c->erase_completion_lock);
         list_move_tail(&jeb->list, &c->erase_complete_list);
         spin_unlock(&c->erase_completion_lock);
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
         /* Ensure that kupdated calls us again to mark them clean */
         jffs2_erase_pending_trigger(c);
 }
@@ -180,26 +180,26 @@ static void jffs2_erase_failed(struct jffs2_sb_info *c, struct jffs2_eraseblock
                    failed too many times. */
                 if (!jffs2_write_nand_badblock(c, jeb, bad_offset)) {
                         /* We'd like to give this block another try. */
-                        down(&c->erase_free_sem);
+                        mutex_lock(&c->erase_free_sem);
                         spin_lock(&c->erase_completion_lock);
                         list_move(&jeb->list, &c->erase_pending_list);
                         c->erasing_size -= c->sector_size;
                         c->dirty_size += c->sector_size;
                         jeb->dirty_size = c->sector_size;
                         spin_unlock(&c->erase_completion_lock);
-                        up(&c->erase_free_sem);
+                        mutex_unlock(&c->erase_free_sem);
                         return;
                 }
         }
 
-        down(&c->erase_free_sem);
+        mutex_lock(&c->erase_free_sem);
         spin_lock(&c->erase_completion_lock);
         c->erasing_size -= c->sector_size;
         c->bad_size += c->sector_size;
         list_move(&jeb->list, &c->bad_list);
         c->nr_erasing_blocks--;
         spin_unlock(&c->erase_completion_lock);
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
         wake_up(&c->erase_wait);
 }
 
@@ -350,9 +350,11 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
                            break;
                 } while(--retlen);
                 c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size);
-                if (retlen)
+                if (retlen) {
                         printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset 0x%08tx\n",
                                *wordebuf, jeb->offset + c->sector_size-retlen*sizeof(*wordebuf));
+                        return -EIO;
+                }
                 return 0;
         }
  do_flash_read:
@@ -373,10 +375,12 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
                 ret = c->mtd->read(c->mtd, ofs, readlen, &retlen, ebuf);
                 if (ret) {
                         printk(KERN_WARNING "Read of newly-erased block at 0x%08x failed: %d. Putting on bad_list\n", ofs, ret);
+                        ret = -EIO;
                         goto fail;
                 }
                 if (retlen != readlen) {
                         printk(KERN_WARNING "Short read from newly-erased block at 0x%08x. Wanted %d, got %zd\n", ofs, readlen, retlen);
+                        ret = -EIO;
                         goto fail;
                 }
                 for (i=0; i<readlen; i += sizeof(unsigned long)) {
@@ -385,6 +389,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
                         if (*datum + 1) {
                                 *bad_offset += i;
                                 printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset 0x%08x\n", *datum, *bad_offset);
+                                ret = -EIO;
                                 goto fail;
                         }
                 }
@@ -419,9 +424,6 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
                         if (jffs2_write_nand_cleanmarker(c, jeb))
                                 goto filebad;
                 }
-
-                /* Everything else got zeroed before the erase */
-                jeb->free_size = c->sector_size;
         } else {
 
                 struct kvec vecs[1];
@@ -449,48 +451,50 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
 
                         goto filebad;
                 }
-
-                /* Everything else got zeroed before the erase */
-                jeb->free_size = c->sector_size;
-                /* FIXME Special case for cleanmarker in empty block */
-                jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, c->cleanmarker_size, NULL);
         }
+        /* Everything else got zeroed before the erase */
+        jeb->free_size = c->sector_size;
 
-        down(&c->erase_free_sem);
+        mutex_lock(&c->erase_free_sem);
         spin_lock(&c->erase_completion_lock);
+
         c->erasing_size -= c->sector_size;
-        c->free_size += jeb->free_size;
-        c->used_size += jeb->used_size;
+        c->free_size += c->sector_size;
 
-        jffs2_dbg_acct_sanity_check_nolock(c,jeb);
-        jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
+        /* Account for cleanmarker now, if it's in-band */
+        if (c->cleanmarker_size && !jffs2_cleanmarker_oob(c))
+                jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, c->cleanmarker_size, NULL);
 
-        list_add_tail(&jeb->list, &c->free_list);
+        list_move_tail(&jeb->list, &c->free_list);
         c->nr_erasing_blocks--;
         c->nr_free_blocks++;
+
+        jffs2_dbg_acct_sanity_check_nolock(c, jeb);
+        jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
+
         spin_unlock(&c->erase_completion_lock);
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
         wake_up(&c->erase_wait);
         return;
 
 filebad:
-        down(&c->erase_free_sem);
+        mutex_lock(&c->erase_free_sem);
         spin_lock(&c->erase_completion_lock);
         /* Stick it on a list (any list) so erase_failed can take it
            right off again.  Silly, but shouldn't happen often. */
-        list_add(&jeb->list, &c->erasing_list);
+        list_move(&jeb->list, &c->erasing_list);
         spin_unlock(&c->erase_completion_lock);
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
         jffs2_erase_failed(c, jeb, bad_offset);
         return;
 
 refile:
         /* Stick it back on the list from whence it came and come back later */
         jffs2_erase_pending_trigger(c);
-        down(&c->erase_free_sem);
+        mutex_lock(&c->erase_free_sem);
         spin_lock(&c->erase_completion_lock);
-        list_add(&jeb->list, &c->erase_complete_list);
+        list_move(&jeb->list, &c->erase_complete_list);
         spin_unlock(&c->erase_completion_lock);
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
         return;
 }
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index dcc2734e0b5d..5e920343b2c5 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -115,9 +115,9 @@ static int jffs2_readpage (struct file *filp, struct page *pg)
         struct jffs2_inode_info *f = JFFS2_INODE_INFO(pg->mapping->host);
         int ret;
 
-        down(&f->sem);
+        mutex_lock(&f->sem);
         ret = jffs2_do_readpage_unlock(pg->mapping->host, pg);
-        up(&f->sem);
+        mutex_unlock(&f->sem);
         return ret;
 }
 
@@ -154,7 +154,7 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
                 if (ret)
                         goto out_page;
 
-                down(&f->sem);
+                mutex_lock(&f->sem);
                 memset(&ri, 0, sizeof(ri));
 
                 ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -181,7 +181,7 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
                 if (IS_ERR(fn)) {
                         ret = PTR_ERR(fn);
                         jffs2_complete_reservation(c);
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         goto out_page;
                 }
                 ret = jffs2_add_full_dnode_to_inode(c, f, fn);
@@ -195,12 +195,12 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
                         jffs2_mark_node_obsolete(c, fn->raw);
                         jffs2_free_full_dnode(fn);
                         jffs2_complete_reservation(c);
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         goto out_page;
                 }
                 jffs2_complete_reservation(c);
                 inode->i_size = pageofs;
-                up(&f->sem);
+                mutex_unlock(&f->sem);
         }
 
         /*
@@ -209,9 +209,9 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
          * case of a short-copy.
          */
         if (!PageUptodate(pg)) {
-                down(&f->sem);
+                mutex_lock(&f->sem);
                 ret = jffs2_do_readpage_nolock(inode, pg);
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 if (ret)
                         goto out_page;
         }
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index e26ea78c7892..3eb1c84b0a33 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -36,6 +36,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
         unsigned int ivalid;
         uint32_t alloclen;
         int ret;
+        int alloc_type = ALLOC_NORMAL;
 
         D1(printk(KERN_DEBUG "jffs2_setattr(): ino #%lu\n", inode->i_ino));
 
@@ -50,20 +51,20 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
                 mdata = (char *)&dev;
                 D1(printk(KERN_DEBUG "jffs2_setattr(): Writing %d bytes of kdev_t\n", mdatalen));
         } else if (S_ISLNK(inode->i_mode)) {
-                down(&f->sem);
+                mutex_lock(&f->sem);
                 mdatalen = f->metadata->size;
                 mdata = kmalloc(f->metadata->size, GFP_USER);
                 if (!mdata) {
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         return -ENOMEM;
                 }
                 ret = jffs2_read_dnode(c, f, f->metadata, mdata, 0, mdatalen);
                 if (ret) {
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         kfree(mdata);
                         return ret;
                 }
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 D1(printk(KERN_DEBUG "jffs2_setattr(): Writing %d bytes of symlink target\n", mdatalen));
         }
 
@@ -82,7 +83,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
                          kfree(mdata);
                 return ret;
         }
-        down(&f->sem);
+        mutex_lock(&f->sem);
         ivalid = iattr->ia_valid;
 
         ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -115,6 +116,10 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
                 ri->compr = JFFS2_COMPR_ZERO;
                 ri->dsize = cpu_to_je32(iattr->ia_size - inode->i_size);
                 ri->offset = cpu_to_je32(inode->i_size);
+        } else if (ivalid & ATTR_SIZE && !iattr->ia_size) {
+                /* For truncate-to-zero, treat it as deletion because
+                   it'll always be obsoleting all previous nodes */
+                alloc_type = ALLOC_DELETION;
         }
         ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
         if (mdatalen)
@@ -122,14 +127,14 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
         else
                 ri->data_crc = cpu_to_je32(0);
 
-        new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, ALLOC_NORMAL);
+        new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, alloc_type);
         if (S_ISLNK(inode->i_mode))
                 kfree(mdata);
 
         if (IS_ERR(new_metadata)) {
                 jffs2_complete_reservation(c);
                 jffs2_free_raw_inode(ri);
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 return PTR_ERR(new_metadata);
         }
         /* It worked. Update the inode */
@@ -149,6 +154,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
         if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) {
                 jffs2_add_full_dnode_to_inode(c, f, new_metadata);
                 inode->i_size = iattr->ia_size;
+                inode->i_blocks = (inode->i_size + 511) >> 9;
                 f->metadata = NULL;
         } else {
                 f->metadata = new_metadata;
@@ -159,7 +165,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
         }
         jffs2_free_raw_inode(ri);
 
-        up(&f->sem);
+        mutex_unlock(&f->sem);
         jffs2_complete_reservation(c);
 
         /* We have to do the vmtruncate() without f->sem held, since
@@ -167,8 +173,10 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
            We are protected from a simultaneous write() extending i_size
            back past iattr->ia_size, because do_truncate() holds the
            generic inode semaphore. */
-        if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size)
-                vmtruncate(inode, iattr->ia_size);
+        if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size) {
+                vmtruncate(inode, iattr->ia_size);      
+                inode->i_blocks = (inode->i_size + 511) >> 9;
+        }       
 
         return 0;
 }
@@ -248,12 +256,12 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
         c = JFFS2_SB_INFO(inode->i_sb);
 
         jffs2_init_inode_info(f);
-        down(&f->sem);
+        mutex_lock(&f->sem);
 
         ret = jffs2_do_read_inode(c, f, inode->i_ino, &latest_node);
 
         if (ret) {
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 iget_failed(inode);
                 return ERR_PTR(ret);
         }
@@ -330,7 +338,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
                 printk(KERN_WARNING "jffs2_read_inode(): Bogus imode %o for ino %lu\n", inode->i_mode, (unsigned long)inode->i_ino);
         }
 
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 
         D1(printk(KERN_DEBUG "jffs2_read_inode() returning\n"));
         unlock_new_inode(inode);
@@ -339,7 +347,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
 error_io:
         ret = -EIO;
 error:
-        up(&f->sem);
+        mutex_unlock(&f->sem);
         jffs2_do_clear_inode(c, f);
         iget_failed(inode);
         return ERR_PTR(ret);
@@ -380,9 +388,9 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
            Flush the writebuffer, if neccecary, else we loose it */
         if (!(sb->s_flags & MS_RDONLY)) {
                 jffs2_stop_garbage_collect_thread(c);
-                down(&c->alloc_sem);
+                mutex_lock(&c->alloc_sem);
                 jffs2_flush_wbuf_pad(c);
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
         }
 
         if (!(*flags & MS_RDONLY))
@@ -429,7 +437,7 @@ struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_i
 
         f = JFFS2_INODE_INFO(inode);
         jffs2_init_inode_info(f);
-        down(&f->sem);
+        mutex_lock(&f->sem);
 
         memset(ri, 0, sizeof(*ri));
         /* Set OS-specific defaults for new inodes */
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 32ff0373aa04..bad005664e30 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -126,7 +126,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
         int ret = 0, inum, nlink;
         int xattr = 0;
 
-        if (down_interruptible(&c->alloc_sem))
+        if (mutex_lock_interruptible(&c->alloc_sem))
                 return -EINTR;
 
         for (;;) {
@@ -143,7 +143,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                                c->unchecked_size);
                         jffs2_dbg_dump_block_lists_nolock(c);
                         spin_unlock(&c->erase_completion_lock);
-                        up(&c->alloc_sem);
+                        mutex_unlock(&c->alloc_sem);
                         return -ENOSPC;
                 }
 
@@ -190,7 +190,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                          made no progress in this case, but that should be OK */
                         c->checked_ino--;
 
-                        up(&c->alloc_sem);
+                        mutex_unlock(&c->alloc_sem);
                         sleep_on_spinunlock(&c->inocache_wq, &c->inocache_lock);
                         return 0;
 
@@ -210,7 +210,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                         printk(KERN_WARNING "Returned error for crccheck of ino #%u. Expect badness...\n", ic->ino);
 
                 jffs2_set_inocache_state(c, ic, INO_STATE_CHECKEDABSENT);
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 return ret;
         }
 
@@ -221,9 +221,15 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                 jeb = jffs2_find_gc_block(c);
 
         if (!jeb) {
-                D1 (printk(KERN_NOTICE "jffs2: Couldn't find erase block to garbage collect!\n"));
+                /* Couldn't find a free block. But maybe we can just erase one and make 'progress'? */
+                if (!list_empty(&c->erase_pending_list)) {
+                        spin_unlock(&c->erase_completion_lock);
+                        mutex_unlock(&c->alloc_sem);
+                        return -EAGAIN;
+                }
+                D1(printk(KERN_NOTICE "jffs2: Couldn't find erase block to garbage collect!\n"));
                 spin_unlock(&c->erase_completion_lock);
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 return -EIO;
         }
 
@@ -232,7 +238,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
            printk(KERN_DEBUG "Nextblock at  %08x, used_size %08x, dirty_size %08x, wasted_size %08x, free_size %08x\n", c->nextblock->offset, c->nextblock->used_size, c->nextblock->dirty_size, c->nextblock->wasted_size, c->nextblock->free_size));
 
         if (!jeb->used_size) {
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 goto eraseit;
         }
 
@@ -248,7 +254,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                                jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size);
                         jeb->gc_node = raw;
                         spin_unlock(&c->erase_completion_lock);
-                        up(&c->alloc_sem);
+                        mutex_unlock(&c->alloc_sem);
                         BUG();
                 }
         }
@@ -266,7 +272,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                         /* Just mark it obsolete */
                         jffs2_mark_node_obsolete(c, raw);
                 }
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 goto eraseit_lock;
         }
 
@@ -334,7 +340,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                 */
                 printk(KERN_CRIT "Inode #%u already in state %d in jffs2_garbage_collect_pass()!\n",
                        ic->ino, ic->state);
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 spin_unlock(&c->inocache_lock);
                 BUG();
 
@@ -345,7 +351,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                    the alloc_sem() (for marking nodes invalid) so we must
                    drop the alloc_sem before sleeping. */
 
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 D1(printk(KERN_DEBUG "jffs2_garbage_collect_pass() waiting for ino #%u in state %d\n",
                           ic->ino, ic->state));
                 sleep_on_spinunlock(&c->inocache_wq, &c->inocache_lock);
@@ -416,7 +422,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                 ret = -ENOSPC;
         }
  release_sem:
-        up(&c->alloc_sem);
+        mutex_unlock(&c->alloc_sem);
 
  eraseit_lock:
         /* If we've finished this block, start it erasing */
@@ -445,7 +451,7 @@ static int jffs2_garbage_collect_live(struct jffs2_sb_info *c,  struct jffs2_era
         uint32_t start = 0, end = 0, nrfrags = 0;
         int ret = 0;
 
-        down(&f->sem);
+        mutex_lock(&f->sem);
 
         /* Now we have the lock for this inode. Check that it's still the one at the head
            of the list. */
@@ -525,7 +531,7 @@ static int jffs2_garbage_collect_live(struct jffs2_sb_info *c,  struct jffs2_era
                 }
         }
  upnout:
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 
         return ret;
 }
@@ -846,7 +852,7 @@ static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct
                 /* Prevent the erase code from nicking the obsolete node refs while
                    we're looking at them. I really don't like this extra lock but
                    can't see any alternative. Suggestions on a postcard to... */
-                down(&c->erase_free_sem);
+                mutex_lock(&c->erase_free_sem);
 
                 for (raw = f->inocache->nodes; raw != (void *)f->inocache; raw = raw->next_in_ino) {
 
@@ -899,7 +905,7 @@ static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct
                         /* OK. The name really does match. There really is still an older node on
                            the flash which our deletion dirent obsoletes. So we have to write out
                            a new deletion dirent to replace it */
-                        up(&c->erase_free_sem);
+                        mutex_unlock(&c->erase_free_sem);
 
                         D1(printk(KERN_DEBUG "Deletion dirent at %08x still obsoletes real dirent \"%s\" at %08x for ino #%u\n",
                                   ref_offset(fd->raw), fd->name, ref_offset(raw), je32_to_cpu(rd->ino)));
@@ -908,7 +914,7 @@ static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct
                         return jffs2_garbage_collect_dirent(c, jeb, f, fd);
                 }
 
-                up(&c->erase_free_sem);
+                mutex_unlock(&c->erase_free_sem);
                 kfree(rd);
         }
 
@@ -1081,7 +1087,7 @@ static int jffs2_garbage_collect_hole(struct jffs2_sb_info *c, struct jffs2_eras
         return 0;
 }
 
-static int jffs2_garbage_collect_dnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_dnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *orig_jeb,
                                        struct jffs2_inode_info *f, struct jffs2_full_dnode *fn,
                                        uint32_t start, uint32_t end)
 {
diff --git a/fs/jffs2/ioctl.c b/fs/jffs2/ioctl.c
index f4d525b0ea53..e2177210f621 100644
--- a/fs/jffs2/ioctl.c
+++ b/fs/jffs2/ioctl.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/fs.h>
+#include "nodelist.h"
 
 int jffs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                 unsigned long arg)
diff --git a/fs/jffs2/jffs2_fs_i.h b/fs/jffs2/jffs2_fs_i.h
index a841f4973a74..31559f45fdde 100644
--- a/fs/jffs2/jffs2_fs_i.h
+++ b/fs/jffs2/jffs2_fs_i.h
@@ -15,7 +15,7 @@
 #include <linux/version.h>
 #include <linux/rbtree.h>
 #include <linux/posix_acl.h>
-#include <linux/semaphore.h>
+#include <linux/mutex.h>
 
 struct jffs2_inode_info {
         /* We need an internal mutex similar to inode->i_mutex.
@@ -24,7 +24,7 @@ struct jffs2_inode_info {
            before letting GC proceed. Or we'd have to put ugliness
            into the GC code so it didn't attempt to obtain the i_mutex
            for the inode(s) which are already locked */
-        struct semaphore sem;
+        struct mutex sem;
 
         /* The highest (datanode) version number used for this ino */
         uint32_t highest_version;
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index 18fca2b9e531..85ef6dbb1be7 100644
--- a/fs/jffs2/jffs2_fs_sb.h
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -16,7 +16,7 @@
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
 #include <linux/completion.h>
-#include <linux/semaphore.h>
+#include <linux/mutex.h>
 #include <linux/timer.h>
 #include <linux/wait.h>
 #include <linux/list.h>
@@ -44,7 +44,7 @@ struct jffs2_sb_info {
         struct completion gc_thread_start; /* GC thread start completion */
         struct completion gc_thread_exit; /* GC thread exit completion port */
 
-        struct semaphore alloc_sem;     /* Used to protect all the following
+        struct mutex alloc_sem;         /* Used to protect all the following
                                            fields, and also to protect against
                                            out-of-order writing of nodes. And GC. */
         uint32_t cleanmarker_size;      /* Size of an _inline_ CLEANMARKER
@@ -87,6 +87,7 @@ struct jffs2_sb_info {
         struct list_head erasable_list;         /* Blocks which are completely dirty, and need erasing */
         struct list_head erasable_pending_wbuf_list;    /* Blocks which need erasing but only after the current wbuf is flushed */
         struct list_head erasing_list;          /* Blocks which are currently erasing */
+        struct list_head erase_checking_list;   /* Blocks which are being checked and marked */
         struct list_head erase_pending_list;    /* Blocks which need erasing now */
         struct list_head erase_complete_list;   /* Blocks which are erased and need the clean marker written to them */
         struct list_head free_list;             /* Blocks which are free and ready to be used */
@@ -104,7 +105,7 @@ struct jffs2_sb_info {
         /* Sem to allow jffs2_garbage_collect_deletion_dirent to
            drop the erase_completion_lock while it's holding a pointer
            to an obsoleted node. I don't like this. Alternatives welcomed. */
-        struct semaphore erase_free_sem;
+        struct mutex erase_free_sem;
 
         uint32_t wbuf_pagesize; /* 0 for NOR and other flashes with no wbuf */
 
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index ec1aae9e695e..8219df6eb6d8 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -87,7 +87,7 @@ struct jffs2_raw_node_ref
                 xattr_ref or xattr_datum instead. The common part of those structures
                 has NULL in the first word. See jffs2_raw_ref_to_ic() below */
         uint32_t flash_offset;
-#define TEST_TOTLEN
+#undef TEST_TOTLEN
 #ifdef TEST_TOTLEN
         uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */
 #endif
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index a0313fa8748e..9df8f3ef20df 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -48,7 +48,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
         minsize = PAD(minsize);
 
         D1(printk(KERN_DEBUG "jffs2_reserve_space(): Requested 0x%x bytes\n", minsize));
-        down(&c->alloc_sem);
+        mutex_lock(&c->alloc_sem);
 
         D1(printk(KERN_DEBUG "jffs2_reserve_space(): alloc sem got\n"));
 
@@ -57,7 +57,6 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
         /* this needs a little more thought (true <tglx> :)) */
         while(ret == -EAGAIN) {
                 while(c->nr_free_blocks + c->nr_erasing_blocks < blocksneeded) {
-                        int ret;
                         uint32_t dirty, avail;
 
                         /* calculate real dirty size
@@ -82,7 +81,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
                                           dirty, c->unchecked_size, c->sector_size));
 
                                 spin_unlock(&c->erase_completion_lock);
-                                up(&c->alloc_sem);
+                                mutex_unlock(&c->alloc_sem);
                                 return -ENOSPC;
                         }
 
@@ -105,11 +104,11 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
                                 D1(printk(KERN_DEBUG "max. available size 0x%08x  < blocksneeded * sector_size 0x%08x, returning -ENOSPC\n",
                                           avail, blocksneeded * c->sector_size));
                                 spin_unlock(&c->erase_completion_lock);
-                                up(&c->alloc_sem);
+                                mutex_unlock(&c->alloc_sem);
                                 return -ENOSPC;
                         }
 
-                        up(&c->alloc_sem);
+                        mutex_unlock(&c->alloc_sem);
 
                         D1(printk(KERN_DEBUG "Triggering GC pass. nr_free_blocks %d, nr_erasing_blocks %d, free_size 0x%08x, dirty_size 0x%08x, wasted_size 0x%08x, used_size 0x%08x, erasing_size 0x%08x, bad_size 0x%08x (total 0x%08x of 0x%08x)\n",
                                   c->nr_free_blocks, c->nr_erasing_blocks, c->free_size, c->dirty_size, c->wasted_size, c->used_size, c->erasing_size, c->bad_size,
@@ -117,7 +116,10 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
                         spin_unlock(&c->erase_completion_lock);
 
                         ret = jffs2_garbage_collect_pass(c);
-                        if (ret)
+
+                        if (ret == -EAGAIN)
+                                jffs2_erase_pending_blocks(c, 1);
+                        else if (ret)
                                 return ret;
 
                         cond_resched();
@@ -125,7 +127,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
                         if (signal_pending(current))
                                 return -EINTR;
 
-                        down(&c->alloc_sem);
+                        mutex_lock(&c->alloc_sem);
                         spin_lock(&c->erase_completion_lock);
                 }
 
@@ -138,7 +140,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
         if (!ret)
                 ret = jffs2_prealloc_raw_node_refs(c, c->nextblock, 1);
         if (ret)
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
         return ret;
 }
 
@@ -463,7 +465,7 @@ void jffs2_complete_reservation(struct jffs2_sb_info *c)
 {
         D1(printk(KERN_DEBUG "jffs2_complete_reservation()\n"));
         jffs2_garbage_collect_trigger(c);
-        up(&c->alloc_sem);
+        mutex_unlock(&c->alloc_sem);
 }
 
 static inline int on_list(struct list_head *obj, struct list_head *head)
@@ -512,7 +514,7 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
                    any jffs2_raw_node_refs. So we don't need to stop erases from
                    happening, or protect against people holding an obsolete
                    jffs2_raw_node_ref without the erase_completion_lock. */
-                down(&c->erase_free_sem);
+                mutex_lock(&c->erase_free_sem);
         }
 
         spin_lock(&c->erase_completion_lock);
@@ -715,7 +717,7 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
         }
 
  out_erase_sem:
-        up(&c->erase_free_sem);
+        mutex_unlock(&c->erase_free_sem);
 }
 
 int jffs2_thread_should_wake(struct jffs2_sb_info *c)
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index e512a93d6249..4cb4d76de07f 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -825,8 +825,9 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
         else // normal case...
                 tn->fn->size = je32_to_cpu(rd->dsize);
 
-        dbg_readinode("dnode @%08x: ver %u, offset %#04x, dsize %#04x, csize %#04x\n",
-                  ref_offset(ref), je32_to_cpu(rd->version), je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize), csize);
+        dbg_readinode2("dnode @%08x: ver %u, offset %#04x, dsize %#04x, csize %#04x\n",
+                       ref_offset(ref), je32_to_cpu(rd->version),
+                       je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize), csize);
 
         ret = jffs2_add_tn_to_tree(c, rii, tn);
 
@@ -836,13 +837,13 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
                 jffs2_free_tmp_dnode_info(tn);
                 return ret;
         }
-#ifdef JFFS2_DBG_READINODE_MESSAGES
-        dbg_readinode("After adding ver %d:\n", je32_to_cpu(rd->version));
+#ifdef JFFS2_DBG_READINODE2_MESSAGES
+        dbg_readinode2("After adding ver %d:\n", je32_to_cpu(rd->version));
         tn = tn_first(&rii->tn_root);
         while (tn) {
-                dbg_readinode("%p: v %d r 0x%x-0x%x ov %d\n",
-                             tn, tn->version, tn->fn->ofs,
-                             tn->fn->ofs+tn->fn->size, tn->overlapped);
+                dbg_readinode2("%p: v %d r 0x%x-0x%x ov %d\n",
+                               tn, tn->version, tn->fn->ofs,
+                               tn->fn->ofs+tn->fn->size, tn->overlapped);
                 tn = tn_next(tn);
         }
 #endif
@@ -1193,7 +1194,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
                 JFFS2_ERROR("failed to read from flash: error %d, %zd of %zd bytes read\n",
                         ret, retlen, sizeof(*latest_node));
                 /* FIXME: If this fails, there seems to be a memory leak. Find it. */
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_do_clear_inode(c, f);
                 return ret?ret:-EIO;
         }
@@ -1202,7 +1203,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
         if (crc != je32_to_cpu(latest_node->node_crc)) {
                 JFFS2_ERROR("CRC failed for read_inode of inode %u at physical location 0x%x\n",
                         f->inocache->ino, ref_offset(rii.latest_ref));
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_do_clear_inode(c, f);
                 return -EIO;
         }
@@ -1242,7 +1243,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
                         f->target = kmalloc(je32_to_cpu(latest_node->csize) + 1, GFP_KERNEL);
                         if (!f->target) {
                                 JFFS2_ERROR("can't allocate %d bytes of memory for the symlink target path cache\n", je32_to_cpu(latest_node->csize));
-                                up(&f->sem);
+                                mutex_unlock(&f->sem);
                                 jffs2_do_clear_inode(c, f);
                                 return -ENOMEM;
                         }
@@ -1255,7 +1256,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
                                         ret = -EIO;
                                 kfree(f->target);
                                 f->target = NULL;
-                                up(&f->sem);
+                                mutex_unlock(&f->sem);
                                 jffs2_do_clear_inode(c, f);
                                 return -ret;
                         }
@@ -1273,14 +1274,14 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
                 if (f->metadata) {
                         JFFS2_ERROR("Argh. Special inode #%u with mode 0%o had metadata node\n",
                                f->inocache->ino, jemode_to_cpu(latest_node->mode));
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         jffs2_do_clear_inode(c, f);
                         return -EIO;
                 }
                 if (!frag_first(&f->fragtree)) {
                         JFFS2_ERROR("Argh. Special inode #%u with mode 0%o has no fragments\n",
                                f->inocache->ino, jemode_to_cpu(latest_node->mode));
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         jffs2_do_clear_inode(c, f);
                         return -EIO;
                 }
@@ -1289,7 +1290,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
                         JFFS2_ERROR("Argh. Special inode #%u with mode 0x%x had more than one node\n",
                                f->inocache->ino, jemode_to_cpu(latest_node->mode));
                         /* FIXME: Deal with it - check crc32, check for duplicate node, check times and discard the older one */
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         jffs2_do_clear_inode(c, f);
                         return -EIO;
                 }
@@ -1379,12 +1380,13 @@ int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *i
         if (!f)
                 return -ENOMEM;
 
-        init_MUTEX_LOCKED(&f->sem);
+        mutex_init(&f->sem);
+        mutex_lock(&f->sem);
         f->inocache = ic;
 
         ret = jffs2_do_read_inode_internal(c, f, &n);
         if (!ret) {
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_do_clear_inode(c, f);
         }
         kfree (f);
@@ -1398,7 +1400,7 @@ void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f)
 
         jffs2_clear_acl(f);
         jffs2_xattr_delete_inode(c, f->inocache);
-        down(&f->sem);
+        mutex_lock(&f->sem);
         deleted = f->inocache && !f->inocache->nlink;
 
         if (f->inocache && f->inocache->state != INO_STATE_CHECKING)
@@ -1430,5 +1432,5 @@ void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f)
                         jffs2_del_ino_cache(c, f->inocache);
         }
 
-        up(&f->sem);
+        mutex_unlock(&f->sem);
 }
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 4677355996cc..f3353df178e7 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -47,7 +47,7 @@ static void jffs2_i_init_once(struct kmem_cache *cachep, void *foo)
 {
         struct jffs2_inode_info *ei = (struct jffs2_inode_info *) foo;
 
-        init_MUTEX(&ei->sem);
+        mutex_init(&ei->sem);
         inode_init_once(&ei->vfs_inode);
 }
 
@@ -55,9 +55,9 @@ static int jffs2_sync_fs(struct super_block *sb, int wait)
 {
         struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
 
-        down(&c->alloc_sem);
+        mutex_lock(&c->alloc_sem);
         jffs2_flush_wbuf_pad(c);
-        up(&c->alloc_sem);
+        mutex_unlock(&c->alloc_sem);
         return 0;
 }
 
@@ -95,8 +95,8 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
 
         /* Initialize JFFS2 superblock locks, the further initialization will
          * be done later */
-        init_MUTEX(&c->alloc_sem);
-        init_MUTEX(&c->erase_free_sem);
+        mutex_init(&c->alloc_sem);
+        mutex_init(&c->erase_free_sem);
         init_waitqueue_head(&c->erase_wait);
         init_waitqueue_head(&c->inocache_wq);
         spin_lock_init(&c->erase_completion_lock);
@@ -125,9 +125,9 @@ static void jffs2_put_super (struct super_block *sb)
 
         D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n"));
 
-        down(&c->alloc_sem);
+        mutex_lock(&c->alloc_sem);
         jffs2_flush_wbuf_pad(c);
-        up(&c->alloc_sem);
+        mutex_unlock(&c->alloc_sem);
 
         jffs2_sum_exit(c);
 
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index d1d4f27464ba..8de52b607678 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -578,8 +578,8 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
         if (!jffs2_is_writebuffered(c))
                 return 0;
 
-        if (!down_trylock(&c->alloc_sem)) {
-                up(&c->alloc_sem);
+        if (mutex_trylock(&c->alloc_sem)) {
+                mutex_unlock(&c->alloc_sem);
                 printk(KERN_CRIT "jffs2_flush_wbuf() called with alloc_sem not locked!\n");
                 BUG();
         }
@@ -702,10 +702,10 @@ int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino)
         if (!c->wbuf)
                 return 0;
 
-        down(&c->alloc_sem);
+        mutex_lock(&c->alloc_sem);
         if (!jffs2_wbuf_pending_for_ino(c, ino)) {
                 D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino));
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
                 return 0;
         }
 
@@ -725,14 +725,14 @@ int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino)
         } else while (old_wbuf_len &&
                       old_wbuf_ofs == c->wbuf_ofs) {
 
-                up(&c->alloc_sem);
+                mutex_unlock(&c->alloc_sem);
 
                 D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n"));
 
                 ret = jffs2_garbage_collect_pass(c);
                 if (ret) {
                         /* GC failed. Flush it with padding instead */
-                        down(&c->alloc_sem);
+                        mutex_lock(&c->alloc_sem);
                         down_write(&c->wbuf_sem);
                         ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING);
                         /* retry flushing wbuf in case jffs2_wbuf_recover
@@ -742,12 +742,12 @@ int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino)
                         up_write(&c->wbuf_sem);
                         break;
                 }
-                down(&c->alloc_sem);
+                mutex_lock(&c->alloc_sem);
         }
 
         D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n"));
 
-        up(&c->alloc_sem);
+        mutex_unlock(&c->alloc_sem);
         return ret;
 }
 
@@ -1236,12 +1236,24 @@ int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
         if (!c->wbuf)
                 return -ENOMEM;
 
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+        c->wbuf_verify = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+        if (!c->wbuf_verify) {
+                kfree(c->oobbuf);
+                kfree(c->wbuf);
+                return -ENOMEM;
+        }
+#endif
+
         printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size);
 
         return 0;
 }
 
 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) {
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+        kfree(c->wbuf_verify);
+#endif
         kfree(c->wbuf);
 }
 
diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c
index 776f13cbf2b5..665fce9797d3 100644
--- a/fs/jffs2/write.c
+++ b/fs/jffs2/write.c
@@ -137,12 +137,12 @@ struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2
                                                              JFFS2_SUMMARY_INODE_SIZE);
                         } else {
                                 /* Locking pain */
-                                up(&f->sem);
+                                mutex_unlock(&f->sem);
                                 jffs2_complete_reservation(c);
 
                                 ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &dummy,
                                                           alloc_mode, JFFS2_SUMMARY_INODE_SIZE);
-                                down(&f->sem);
+                                mutex_lock(&f->sem);
                         }
 
                         if (!ret) {
@@ -285,12 +285,12 @@ struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jff
                                                              JFFS2_SUMMARY_DIRENT_SIZE(namelen));
                         } else {
                                 /* Locking pain */
-                                up(&f->sem);
+                                mutex_unlock(&f->sem);
                                 jffs2_complete_reservation(c);
 
                                 ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy,
                                                           alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
-                                down(&f->sem);
+                                mutex_lock(&f->sem);
                         }
 
                         if (!ret) {
@@ -353,7 +353,7 @@ int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                         D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret));
                         break;
                 }
-                down(&f->sem);
+                mutex_lock(&f->sem);
                 datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1)));
                 cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen);
 
@@ -381,7 +381,7 @@ int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
 
                 if (IS_ERR(fn)) {
                         ret = PTR_ERR(fn);
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         jffs2_complete_reservation(c);
                         if (!retried) {
                                 /* Write error to be retried */
@@ -403,11 +403,11 @@ int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                         jffs2_mark_node_obsolete(c, fn->raw);
                         jffs2_free_full_dnode(fn);
 
-                        up(&f->sem);
+                        mutex_unlock(&f->sem);
                         jffs2_complete_reservation(c);
                         break;
                 }
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_complete_reservation(c);
                 if (!datalen) {
                         printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n");
@@ -439,7 +439,7 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
                                 JFFS2_SUMMARY_INODE_SIZE);
         D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen));
         if (ret) {
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 return ret;
         }
 
@@ -454,7 +454,7 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
         if (IS_ERR(fn)) {
                 D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n"));
                 /* Eeek. Wave bye bye */
-                up(&f->sem);
+                mutex_unlock(&f->sem);
                 jffs2_complete_reservation(c);
                 return PTR_ERR(fn);
         }
@@ -463,7 +463,7 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
         */
         f->metadata = fn;
 
-        up(&f->sem);
+        mutex_unlock(&f->sem);
         jffs2_complete_reservation(c);
 
         ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode);
@@ -489,7 +489,7 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
                 return -ENOMEM;
         }
 
-        down(&dir_f->sem);
+        mutex_lock(&dir_f->sem);
 
         rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
         rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -513,7 +513,7 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
                 /* dirent failed to write. Delete the inode normally
                    as if it were the final unlink() */
                 jffs2_complete_reservation(c);
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
                 return PTR_ERR(fd);
         }
 
@@ -522,7 +522,7 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
         jffs2_add_fd_to_list(c, fd, &dir_f->dents);
 
         jffs2_complete_reservation(c);
-        up(&dir_f->sem);
+        mutex_unlock(&dir_f->sem);
 
         return 0;
 }
@@ -551,7 +551,7 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
                         return ret;
                 }
 
-                down(&dir_f->sem);
+                mutex_lock(&dir_f->sem);
 
                 /* Build a deletion node */
                 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -574,21 +574,21 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
 
                 if (IS_ERR(fd)) {
                         jffs2_complete_reservation(c);
-                        up(&dir_f->sem);
+                        mutex_unlock(&dir_f->sem);
                         return PTR_ERR(fd);
                 }
 
                 /* File it. This will mark the old one obsolete. */
                 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
         } else {
-                struct jffs2_full_dirent *fd = dir_f->dents;
                 uint32_t nhash = full_name_hash(name, namelen);
 
+                fd = dir_f->dents;
                 /* We don't actually want to reserve any space, but we do
                    want to be holding the alloc_sem when we write to flash */
-                down(&c->alloc_sem);
-                down(&dir_f->sem);
+                mutex_lock(&c->alloc_sem);
+                mutex_lock(&dir_f->sem);
 
                 for (fd = dir_f->dents; fd; fd = fd->next) {
                         if (fd->nhash == nhash &&
@@ -607,7 +607,7 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
                                 break;
                         }
                 }
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
         }
 
         /* dead_f is NULL if this was a rename not a real unlink */
@@ -615,7 +615,7 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
            pointing to an inode which didn't exist. */
         if (dead_f && dead_f->inocache) {
 
-                down(&dead_f->sem);
+                mutex_lock(&dead_f->sem);
 
                 if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) {
                         while (dead_f->dents) {
@@ -639,7 +639,7 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
 
                 dead_f->inocache->nlink--;
                 /* NB: Caller must set inode nlink if appropriate */
-                up(&dead_f->sem);
+                mutex_unlock(&dead_f->sem);
         }
 
         jffs2_complete_reservation(c);
@@ -666,7 +666,7 @@ int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint
                 return ret;
         }
 
-        down(&dir_f->sem);
+        mutex_lock(&dir_f->sem);
 
         /* Build a deletion node */
         rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -691,7 +691,7 @@ int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint
 
         if (IS_ERR(fd)) {
                 jffs2_complete_reservation(c);
-                up(&dir_f->sem);
+                mutex_unlock(&dir_f->sem);
                 return PTR_ERR(fd);
         }
 
@@ -699,7 +699,7 @@ int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint
         jffs2_add_fd_to_list(c, fd, &dir_f->dents);
 
         jffs2_complete_reservation(c);
-        up(&dir_f->sem);
+        mutex_unlock(&dir_f->sem);
 
         return 0;
 }