19 files changed, 167 insertions, 94 deletions

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index d96e5c14a9ca..894fee54d4d8 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -73,8 +73,8 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
         status = 0;
 done:
         DPRINTK("returning = %d", status);
-        mntput(mnt);
         dput(dentry);
+        mntput(mnt);
         return status;
 }
 
@@ -333,7 +333,7 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
                         /* Can we expire this guy */
                         if (autofs4_can_expire(dentry, timeout, do_now)) {
                                 expired = dentry;
-                                break;
+                                goto found;
                         }
                         goto next;
                 }
@@ -352,7 +352,7 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
                                 inf->flags |= AUTOFS_INF_EXPIRING;
                                 spin_unlock(&sbi->fs_lock);
                                 expired = dentry;
-                                break;
+                                goto found;
                         }
                         spin_unlock(&sbi->fs_lock);
                 /*
@@ -363,7 +363,7 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
                         expired = autofs4_check_leaves(mnt, dentry, timeout, do_now);
                         if (expired) {
                                 dput(dentry);
-                                break;
+                                goto found;
                         }
                 }
 next:
@@ -371,18 +371,16 @@ next:
                 spin_lock(&dcache_lock);
                 next = next->next;
         }
-
-        if (expired) {
-                DPRINTK("returning %p %.*s",
-                        expired, (int)expired->d_name.len, expired->d_name.name);
-                spin_lock(&dcache_lock);
-                list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child);
-                spin_unlock(&dcache_lock);
-                return expired;
-        }
         spin_unlock(&dcache_lock);
-
         return NULL;
+
+found:
+        DPRINTK("returning %p %.*s",
+                expired, (int)expired->d_name.len, expired->d_name.name);
+        spin_lock(&dcache_lock);
+        list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child);
+        spin_unlock(&dcache_lock);
+        return expired;
 }
 
 /* Perform an expiry operation */
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index aa4c5ff8a40d..edf5b6bddb52 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -146,17 +146,17 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
 
         if (d_mountpoint(dentry)) {
                 struct file *fp = NULL;
-                struct vfsmount *fp_mnt = mntget(mnt);
-                struct dentry *fp_dentry = dget(dentry);
+                struct path fp_path = { .dentry = dentry, .mnt = mnt };
 
-                if (!autofs4_follow_mount(&fp_mnt, &fp_dentry)) {
-                        dput(fp_dentry);
-                        mntput(fp_mnt);
+                path_get(&fp_path);
+
+                if (!autofs4_follow_mount(&fp_path.mnt, &fp_path.dentry)) {
+                        path_put(&fp_path);
                         dcache_dir_close(inode, file);
                         goto out;
                 }
 
-                fp = dentry_open(fp_dentry, fp_mnt, file->f_flags);
+                fp = dentry_open(fp_path.dentry, fp_path.mnt, file->f_flags);
                 status = PTR_ERR(fp);
                 if (IS_ERR(fp)) {
                         dcache_dir_close(inode, file);
@@ -242,7 +242,8 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
 {
         struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
         struct autofs_info *ino = autofs4_dentry_ino(dentry);
-        int status = 0;
+        struct dentry *new;
+        int status;
 
         /* Block on any pending expiry here; invalidate the dentry
            when expiration is done to trigger mount request with a new
@@ -318,7 +319,28 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
         spin_lock(&dentry->d_lock);
         dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
         spin_unlock(&dentry->d_lock);
-        return status;
+
+        /*
+         * The dentry that is passed in from lookup may not be the one
+         * we end up using, as mkdir can create a new one.  If this
+         * happens, and another process tries the lookup at the same time,
+         * it will set the PENDING flag on this new dentry, but add itself
+         * to our waitq.  Then, if after the lookup succeeds, the first
+         * process that requested the mount performs another lookup of the
+         * same directory, it will show up as still pending!  So, we need
+         * to redo the lookup here and clear pending on that dentry.
+         */
+        if (d_unhashed(dentry)) {
+                new = d_lookup(dentry->d_parent, &dentry->d_name);
+                if (new) {
+                        spin_lock(&new->d_lock);
+                        new->d_flags &= ~DCACHE_AUTOFS_PENDING;
+                        spin_unlock(&new->d_lock);
+                        dput(new);
+                }
+        }
+
+        return 0;
 }
 
 /* For autofs direct mounts the follow link triggers the mount */
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 1fe28e4754c2..75e5955c3f6d 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -171,7 +171,7 @@ static int autofs4_getpath(struct autofs_sb_info *sbi,
         for (tmp = dentry ; tmp != root ; tmp = tmp->d_parent)
                 len += tmp->d_name.len + 1;
 
-        if (--len > NAME_MAX) {
+        if (!len || --len > NAME_MAX) {
                 spin_unlock(&dcache_lock);
                 return 0;
         }
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 9ced35b00686..f28cf8b46f80 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -934,7 +934,7 @@ static int fuse_get_user_pages(struct fuse_req *req, const char __user *buf,
 
         nbytes = min(nbytes, (unsigned) FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT);
         npages = (nbytes + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        npages = min(max(npages, 1), FUSE_MAX_PAGES_PER_REQ);
+        npages = clamp(npages, 1, FUSE_MAX_PAGES_PER_REQ);
         down_read(&current->mm->mmap_sem);
         npages = get_user_pages(current, current->mm, user_addr, npages, write,
                                 0, req->pages, NULL);
diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c
index d58f845ccb85..c5e1450d79f9 100644
--- a/fs/jffs2/build.c
+++ b/fs/jffs2/build.c
@@ -46,7 +46,7 @@ next_inode(int *i, struct jffs2_inode_cache *ic, struct jffs2_sb_info *c)
 
 
 static void jffs2_build_inode_pass1(struct jffs2_sb_info *c,
-                                        struct jffs2_inode_cache *ic)
+                                    struct jffs2_inode_cache *ic)
 {
         struct jffs2_full_dirent *fd;
 
@@ -68,11 +68,17 @@ static void jffs2_build_inode_pass1(struct jffs2_sb_info *c,
                         continue;
                 }
 
-                if (child_ic->nlink++ && fd->type == DT_DIR) {
-                        JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n",
-                                fd->name, fd->ino, ic->ino);
-                        /* TODO: What do we do about it? */
-                }
+                if (fd->type == DT_DIR) {
+                        if (child_ic->pino_nlink) {
+                                JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n",
+                                            fd->name, fd->ino, ic->ino);
+                                /* TODO: What do we do about it? */
+                        } else {
+                                child_ic->pino_nlink = ic->ino;
+                        }
+                } else
+                        child_ic->pino_nlink++;
+
                 dbg_fsbuild("increased nlink for child \"%s\" (ino #%u)\n", fd->name, fd->ino);
                 /* Can't free scan_dents so far. We might need them in pass 2 */
         }
@@ -125,7 +131,7 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c)
         dbg_fsbuild("pass 2 starting\n");
 
         for_each_inode(i, c, ic) {
-                if (ic->nlink)
+                if (ic->pino_nlink)
                         continue;
 
                 jffs2_build_remove_unlinked_inode(c, ic, &dead_fds);
@@ -232,16 +238,19 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c,
                         /* Reduce nlink of the child. If it's now zero, stick it on the
                            dead_fds list to be cleaned up later. Else just free the fd */
 
-                        child_ic->nlink--;
+                        if (fd->type == DT_DIR)
+                                child_ic->pino_nlink = 0;
+                        else
+                                child_ic->pino_nlink--;
 
-                        if (!child_ic->nlink) {
-                                dbg_fsbuild("inode #%u (\"%s\") has now got zero nlink, adding to dead_fds list.\n",
+                        if (!child_ic->pino_nlink) {
+                                dbg_fsbuild("inode #%u (\"%s\") now has no links; adding to dead_fds list.\n",
                                           fd->ino, fd->name);
                                 fd->next = *dead_fds;
                                 *dead_fds = fd;
                         } else {
                                 dbg_fsbuild("inode #%u (\"%s\") has now got nlink %d. Ignoring.\n",
-                                          fd->ino, fd->name, child_ic->nlink);
+                                          fd->ino, fd->name, child_ic->pino_nlink);
                                 jffs2_free_full_dirent(fd);
                         }
                 }
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index c63e7a96af0d..c0c141f6fde1 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -208,6 +208,13 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
         f = JFFS2_INODE_INFO(inode);
         dir_f = JFFS2_INODE_INFO(dir_i);
 
+        /* jffs2_do_create() will want to lock it, _after_ reserving
+           space and taking c-alloc_sem. If we keep it locked here,
+           lockdep gets unhappy (although it's a false positive;
+           nothing else will be looking at this inode yet so there's
+           no chance of AB-BA deadlock involving its f->sem). */
+        mutex_unlock(&f->sem);
+
         ret = jffs2_do_create(c, dir_f, f, ri,
                               dentry->d_name.name, dentry->d_name.len);
         if (ret)
@@ -219,7 +226,8 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
         d_instantiate(dentry, inode);
 
         D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
-                  inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
+                  inode->i_ino, inode->i_mode, inode->i_nlink,
+                  f->inocache->pino_nlink, inode->i_mapping->nrpages));
         return 0;
 
  fail:
@@ -243,7 +251,7 @@ static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
         ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
                               dentry->d_name.len, dead_f, now);
         if (dead_f->inocache)
-                dentry->d_inode->i_nlink = dead_f->inocache->nlink;
+                dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink;
         if (!ret)
                 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
         return ret;
@@ -276,7 +284,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
 
         if (!ret) {
                 mutex_lock(&f->sem);
-                old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
+                old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink;
                 mutex_unlock(&f->sem);
                 d_instantiate(dentry, old_dentry->d_inode);
                 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
@@ -493,11 +501,14 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
 
         inode->i_op = &jffs2_dir_inode_operations;
         inode->i_fop = &jffs2_dir_operations;
-        /* Directories get nlink 2 at start */
-        inode->i_nlink = 2;
 
         f = JFFS2_INODE_INFO(inode);
 
+        /* Directories get nlink 2 at start */
+        inode->i_nlink = 2;
+        /* but ic->pino_nlink is the parent ino# */
+        f->inocache->pino_nlink = dir_i->i_ino;
+
         ri->data_crc = cpu_to_je32(0);
         ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
 
@@ -594,17 +605,25 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
 
 static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
 {
+        struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
+        struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
         struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
         struct jffs2_full_dirent *fd;
         int ret;
+        uint32_t now = get_seconds();
 
         for (fd = f->dents ; fd; fd = fd->next) {
                 if (fd->ino)
                         return -ENOTEMPTY;
         }
-        ret = jffs2_unlink(dir_i, dentry);
-        if (!ret)
+
+        ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
+                              dentry->d_name.len, f, now);
+        if (!ret) {
+                dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
+                clear_nlink(dentry->d_inode);
                 drop_nlink(dir_i);
+        }
         return ret;
 }
 
@@ -817,7 +836,10 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
                    inode which didn't exist. */
                 if (victim_f->inocache) {
                         mutex_lock(&victim_f->sem);
-                        victim_f->inocache->nlink--;
+                        if (S_ISDIR(new_dentry->d_inode->i_mode))
+                                victim_f->inocache->pino_nlink = 0;
+                        else
+                                victim_f->inocache->pino_nlink--;
                         mutex_unlock(&victim_f->sem);
                 }
         }
@@ -838,8 +860,8 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
                 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
                 mutex_lock(&f->sem);
                 inc_nlink(old_dentry->d_inode);
-                if (f->inocache)
-                        f->inocache->nlink++;
+                if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
+                        f->inocache->pino_nlink++;
                 mutex_unlock(&f->sem);
 
                 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index 25a640e566d3..dddb2a6c9e2c 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -294,7 +294,7 @@ static inline void jffs2_remove_node_refs_from_ino_list(struct jffs2_sb_info *c,
                         break;
 #endif
                 default:
-                        if (ic->nodes == (void *)ic && ic->nlink == 0)
+                        if (ic->nodes == (void *)ic && ic->pino_nlink == 0)
                                 jffs2_del_ino_cache(c, ic);
         }
 }
@@ -332,7 +332,8 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
         if (c->mtd->point) {
                 unsigned long *wordebuf;
 
-                ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen, (unsigned char **)&ebuf);
+                ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size,
+                                    &retlen, &ebuf, NULL);
                 if (ret) {
                         D1(printk(KERN_DEBUG "MTD point failed %d\n", ret));
                         goto do_flash_read;
@@ -340,7 +341,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
                 if (retlen < c->sector_size) {
                         /* Don't muck about if it won't let us point to the whole erase sector */
                         D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen));
-                        c->mtd->unpoint(c->mtd, ebuf, jeb->offset, retlen);
+                        c->mtd->unpoint(c->mtd, jeb->offset, retlen);
                         goto do_flash_read;
                 }
                 wordebuf = ebuf-sizeof(*wordebuf);
@@ -349,7 +350,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
                    if (*++wordebuf != ~0)
                            break;
                 } while(--retlen);
-                c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size);
+                c->mtd->unpoint(c->mtd, jeb->offset, c->sector_size);
                 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));
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 3eb1c84b0a33..086c43830221 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -273,7 +273,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
         inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime));
         inode->i_ctime = ITIME(je32_to_cpu(latest_node.ctime));
 
-        inode->i_nlink = f->inocache->nlink;
+        inode->i_nlink = f->inocache->pino_nlink;
 
         inode->i_blocks = (inode->i_size + 511) >> 9;
 
@@ -286,13 +286,12 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
         case S_IFDIR:
         {
                 struct jffs2_full_dirent *fd;
+                inode->i_nlink = 2; /* parent and '.' */
 
                 for (fd=f->dents; fd; fd = fd->next) {
                         if (fd->type == DT_DIR && fd->ino)
                                 inc_nlink(inode);
                 }
-                /* and '..' */
-                inc_nlink(inode);
                 /* Root dir gets i_nlink 3 for some reason */
                 if (inode->i_ino == 1)
                         inc_nlink(inode);
@@ -586,11 +585,12 @@ void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 }
 
 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
-                                                     int inum, int nlink)
+                                              int inum, int unlinked)
 {
         struct inode *inode;
         struct jffs2_inode_cache *ic;
-        if (!nlink) {
+
+        if (unlinked) {
                 /* The inode has zero nlink but its nodes weren't yet marked
                    obsolete. This has to be because we're still waiting for
                    the final (close() and) iput() to happen.
@@ -638,8 +638,8 @@ struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
                         return ERR_CAST(inode);
         }
         if (is_bad_inode(inode)) {
-                printk(KERN_NOTICE "Eep. read_inode() failed for ino #%u. nlink %d\n",
-                       inum, nlink);
+                printk(KERN_NOTICE "Eep. read_inode() failed for ino #%u. unlinked %d\n",
+                       inum, unlinked);
                 /* NB. This will happen again. We need to do something appropriate here. */
                 iput(inode);
                 return ERR_PTR(-EIO);
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index bad005664e30..090c556ffed2 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -161,8 +161,8 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
                         continue;
                 }
 
-                if (!ic->nlink) {
-                        D1(printk(KERN_DEBUG "Skipping check of ino #%d with nlink zero\n",
+                if (!ic->pino_nlink) {
+                        D1(printk(KERN_DEBUG "Skipping check of ino #%d with nlink/pino zero\n",
                                   ic->ino));
                         spin_unlock(&c->inocache_lock);
                         jffs2_xattr_delete_inode(c, ic);
@@ -398,10 +398,10 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
            it's vaguely possible. */
 
         inum = ic->ino;
-        nlink = ic->nlink;
+        nlink = ic->pino_nlink;
         spin_unlock(&c->inocache_lock);
 
-        f = jffs2_gc_fetch_inode(c, inum, nlink);
+        f = jffs2_gc_fetch_inode(c, inum, !nlink);
         if (IS_ERR(f)) {
                 ret = PTR_ERR(f);
                 goto release_sem;
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 8219df6eb6d8..1750445556c3 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -177,7 +177,10 @@ struct jffs2_inode_cache {
 #ifdef CONFIG_JFFS2_FS_XATTR
         struct jffs2_xattr_ref *xref;
 #endif
-        int nlink;
+        uint32_t pino_nlink;    /* Directories store parent inode
+                                   here; other inodes store nlink.
+                                   Zero always means that it's
+                                   completely unlinked. */
 };
 
 /* Inode states for 'state' above. We need the 'GC' state to prevent
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index 9df8f3ef20df..a9bf9603c1ba 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -709,7 +709,7 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
                                 break;
 #endif
                         default:
-                                if (ic->nodes == (void *)ic && ic->nlink == 0)
+                                if (ic->nodes == (void *)ic && ic->pino_nlink == 0)
                                         jffs2_del_ino_cache(c, ic);
                                 break;
                 }
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 1b10d2594092..2cc866cf134f 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -187,7 +187,7 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
                             struct jffs2_inode_info *f);
 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
-                                              int inum, int nlink);
+                                              int inum, int unlinked);
 
 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
                                    struct jffs2_inode_info *f,
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 4cb4d76de07f..6ca08ad887c0 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -63,10 +63,11 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info
         /* TODO: instead, incapsulate point() stuff to jffs2_flash_read(),
          * adding and jffs2_flash_read_end() interface. */
         if (c->mtd->point) {
-                err = c->mtd->point(c->mtd, ofs, len, &retlen, &buffer);
+                err = c->mtd->point(c->mtd, ofs, len, &retlen,
+                                    (void **)&buffer, NULL);
                 if (!err && retlen < len) {
                         JFFS2_WARNING("MTD point returned len too short: %zu instead of %u.\n", retlen, tn->csize);
-                        c->mtd->unpoint(c->mtd, buffer, ofs, retlen);
+                        c->mtd->unpoint(c->mtd, ofs, retlen);
                 } else if (err)
                         JFFS2_WARNING("MTD point failed: error code %d.\n", err);
                 else
@@ -100,7 +101,7 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info
                 kfree(buffer);
 #ifndef __ECOS
         else
-                c->mtd->unpoint(c->mtd, buffer, ofs, len);
+                c->mtd->unpoint(c->mtd, ofs, len);
 #endif
 
         if (crc != tn->data_crc) {
@@ -136,7 +137,7 @@ free_out:
                 kfree(buffer);
 #ifndef __ECOS
         else
-                c->mtd->unpoint(c->mtd, buffer, ofs, len);
+                c->mtd->unpoint(c->mtd, ofs, len);
 #endif
         return err;
 }
@@ -1123,7 +1124,8 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
         size_t retlen;
         int ret;
 
-        dbg_readinode("ino #%u nlink is %d\n", f->inocache->ino, f->inocache->nlink);
+        dbg_readinode("ino #%u pino/nlink is %d\n", f->inocache->ino,
+                      f->inocache->pino_nlink);
 
         memset(&rii, 0, sizeof(rii));
 
@@ -1358,7 +1360,7 @@ int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                 }
                 dbg_readinode("creating inocache for root inode\n");
                 memset(f->inocache, 0, sizeof(struct jffs2_inode_cache));
-                f->inocache->ino = f->inocache->nlink = 1;
+                f->inocache->ino = f->inocache->pino_nlink = 1;
                 f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache;
                 f->inocache->state = INO_STATE_READING;
                 jffs2_add_ino_cache(c, f->inocache);
@@ -1401,7 +1403,7 @@ 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);
         mutex_lock(&f->sem);
-        deleted = f->inocache && !f->inocache->nlink;
+        deleted = f->inocache && !f->inocache->pino_nlink;
 
         if (f->inocache && f->inocache->state != INO_STATE_CHECKING)
                 jffs2_set_inocache_state(c, f->inocache, INO_STATE_CLEARING);
diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 272872d27fd5..1d437de1e9a8 100644
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -97,11 +97,12 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
         size_t pointlen;
 
         if (c->mtd->point) {
-                ret = c->mtd->point (c->mtd, 0, c->mtd->size, &pointlen, &flashbuf);
+                ret = c->mtd->point(c->mtd, 0, c->mtd->size, &pointlen,
+                                    (void **)&flashbuf, NULL);
                 if (!ret && pointlen < c->mtd->size) {
                         /* Don't muck about if it won't let us point to the whole flash */
                         D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", pointlen));
-                        c->mtd->unpoint(c->mtd, flashbuf, 0, pointlen);
+                        c->mtd->unpoint(c->mtd, 0, pointlen);
                         flashbuf = NULL;
                 }
                 if (ret)
@@ -267,7 +268,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
                 kfree(flashbuf);
 #ifndef __ECOS
         else
-                c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size);
+                c->mtd->unpoint(c->mtd, 0, c->mtd->size);
 #endif
         if (s)
                 kfree(s);
@@ -940,7 +941,7 @@ struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uin
         ic->nodes = (void *)ic;
         jffs2_add_ino_cache(c, ic);
         if (ino == 1)
-                ic->nlink = 1;
+                ic->pino_nlink = 1;
         return ic;
 }
 
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index f3353df178e7..7da69eae49e4 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -31,11 +31,12 @@ static struct kmem_cache *jffs2_inode_cachep;
 
 static struct inode *jffs2_alloc_inode(struct super_block *sb)
 {
-        struct jffs2_inode_info *ei;
-        ei = (struct jffs2_inode_info *)kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL);
-        if (!ei)
+        struct jffs2_inode_info *f;
+
+        f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL);
+        if (!f)
                 return NULL;
-        return &ei->vfs_inode;
+        return &f->vfs_inode;
 }
 
 static void jffs2_destroy_inode(struct inode *inode)
@@ -45,10 +46,10 @@ static void jffs2_destroy_inode(struct inode *inode)
 
 static void jffs2_i_init_once(struct kmem_cache *cachep, void *foo)
 {
-        struct jffs2_inode_info *ei = (struct jffs2_inode_info *) foo;
+        struct jffs2_inode_info *f = foo;
 
-        mutex_init(&ei->sem);
-        inode_init_once(&ei->vfs_inode);
+        mutex_init(&f->sem);
+        inode_init_once(&f->vfs_inode);
 }
 
 static int jffs2_sync_fs(struct super_block *sb, int wait)
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index 8de52b607678..0e78b00035e4 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -494,7 +494,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
                                 /* If it's an in-core inode, then we have to adjust any
                                    full_dirent or full_dnode structure to point to the
                                    new version instead of the old */
-                                f = jffs2_gc_fetch_inode(c, ic->ino, ic->nlink);
+                                f = jffs2_gc_fetch_inode(c, ic->ino, !ic->pino_nlink);
                                 if (IS_ERR(f)) {
                                         /* Should never happen; it _must_ be present */
                                         JFFS2_ERROR("Failed to iget() ino #%u, err %ld\n",
diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c
index 665fce9797d3..ca29440e9435 100644
--- a/fs/jffs2/write.c
+++ b/fs/jffs2/write.c
@@ -19,7 +19,8 @@
 #include "compr.h"
 
 
-int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri)
+int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
+                       uint32_t mode, struct jffs2_raw_inode *ri)
 {
         struct jffs2_inode_cache *ic;
 
@@ -31,7 +32,7 @@ int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint
         memset(ic, 0, sizeof(*ic));
 
         f->inocache = ic;
-        f->inocache->nlink = 1;
+        f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */
         f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache;
         f->inocache->state = INO_STATE_PRESENT;
 
@@ -438,10 +439,10 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
         ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
                                 JFFS2_SUMMARY_INODE_SIZE);
         D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen));
-        if (ret) {
-                mutex_unlock(&f->sem);
+        if (ret)
                 return ret;
-        }
+
+        mutex_lock(&f->sem);
 
         ri->data_crc = cpu_to_je32(0);
         ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
@@ -635,9 +636,9 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
                                         jffs2_mark_node_obsolete(c, fd->raw);
                                 jffs2_free_full_dirent(fd);
                         }
-                }
-
-                dead_f->inocache->nlink--;
+                        dead_f->inocache->pino_nlink = 0;
+                } else
+                        dead_f->inocache->pino_nlink--;
                 /* NB: Caller must set inode nlink if appropriate */
                 mutex_unlock(&dead_f->sem);
         }
diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index 574cb7532d6c..082e844ab2db 100644
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -592,7 +592,7 @@ void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache
            When an inode with XATTR is removed, those XATTRs must be removed. */
         struct jffs2_xattr_ref *ref, *_ref;
 
-        if (!ic || ic->nlink > 0)
+        if (!ic || ic->pino_nlink > 0)
                 return;
 
         down_write(&c->xattr_sem);
@@ -829,7 +829,7 @@ void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c)
                            ref->xd and ref->ic are not valid yet. */
                         xd = jffs2_find_xattr_datum(c, ref->xid);
                         ic = jffs2_get_ino_cache(c, ref->ino);
-                        if (!xd || !ic || !ic->nlink) {
+                        if (!xd || !ic || !ic->pino_nlink) {
                                 dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan.\n",
                                           ref->ino, ref->xid, ref->xseqno);
                                 ref->xseqno |= XREF_DELETE_MARKER;
diff --git a/fs/utimes.c b/fs/utimes.c
index a2bef77dc9c9..af059d5cb485 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -40,9 +40,14 @@ asmlinkage long sys_utime(char __user *filename, struct utimbuf __user *times)
 
 #endif
 
+static bool nsec_special(long nsec)
+{
+        return nsec == UTIME_OMIT || nsec == UTIME_NOW;
+}
+
 static bool nsec_valid(long nsec)
 {
-        if (nsec == UTIME_OMIT || nsec == UTIME_NOW)
+        if (nsec_special(nsec))
                 return true;
 
         return nsec >= 0 && nsec <= 999999999;
@@ -119,7 +124,15 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
                         newattrs.ia_mtime.tv_nsec = times[1].tv_nsec;
                         newattrs.ia_valid |= ATTR_MTIME_SET;
                 }
-        } else {
+        }
+
+        /*
+         * If times is NULL or both times are either UTIME_OMIT or
+         * UTIME_NOW, then need to check permissions, because
+         * inode_change_ok() won't do it.
+         */
+        if (!times || (nsec_special(times[0].tv_nsec) &&
+                       nsec_special(times[1].tv_nsec))) {
                 error = -EACCES;
                 if (IS_IMMUTABLE(inode))
                         goto mnt_drop_write_and_out;