[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.

Modified-by: Ingo Molnar <mingo@elte.hu>

(finished the conversion)

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

82 files changed, 435 insertions, 440 deletions

diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 9ebe881c6786..44d439cb69f4 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -244,10 +244,10 @@ affs_put_inode(struct inode *inode)
         pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
         affs_free_prealloc(inode);
         if (atomic_read(&inode->i_count) == 1) {
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
                 if (inode->i_size != AFFS_I(inode)->mmu_private)
                         affs_truncate(inode);
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
         }
 }
 
diff --git a/fs/autofs/root.c b/fs/autofs/root.c
index a1ab1c0ed215..808134a5a2fa 100644
--- a/fs/autofs/root.c
+++ b/fs/autofs/root.c
@@ -229,9 +229,9 @@ static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentr
         dentry->d_flags |= DCACHE_AUTOFS_PENDING;
         d_add(dentry, NULL);
 
-        up(&dir->i_sem);
+        mutex_unlock(&dir->i_mutex);
         autofs_revalidate(dentry, nd);
-        down(&dir->i_sem);
+        mutex_lock(&dir->i_mutex);
 
         /*
          * If we are still pending, check if we had to handle
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 2241405ffc41..541b19e6fec9 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -489,9 +489,9 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
         d_add(dentry, NULL);
 
         if (dentry->d_op && dentry->d_op->d_revalidate) {
-                up(&dir->i_sem);
+                mutex_unlock(&dir->i_mutex);
                 (dentry->d_op->d_revalidate)(dentry, nd);
-                down(&dir->i_sem);
+                mutex_lock(&dir->i_mutex);
         }
 
         /*
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 2568eb41cb3a..9ccc7d8275b8 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -588,11 +588,11 @@ static ssize_t bm_entry_write(struct file *file, const char __user *buffer,
                 case 2: set_bit(Enabled, &e->flags);
                         break;
                 case 3: root = dget(file->f_vfsmnt->mnt_sb->s_root);
-                        down(&root->d_inode->i_sem);
+                        mutex_lock(&root->d_inode->i_mutex);
 
                         kill_node(e);
 
-                        up(&root->d_inode->i_sem);
+                        mutex_unlock(&root->d_inode->i_mutex);
                         dput(root);
                         break;
                 default: return res;
@@ -622,7 +622,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
                 return PTR_ERR(e);
 
         root = dget(sb->s_root);
-        down(&root->d_inode->i_sem);
+        mutex_lock(&root->d_inode->i_mutex);
         dentry = lookup_one_len(e->name, root, strlen(e->name));
         err = PTR_ERR(dentry);
         if (IS_ERR(dentry))
@@ -658,7 +658,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
 out2:
         dput(dentry);
 out:
-        up(&root->d_inode->i_sem);
+        mutex_unlock(&root->d_inode->i_mutex);
         dput(root);
 
         if (err) {
@@ -703,12 +703,12 @@ static ssize_t bm_status_write(struct file * file, const char __user * buffer,
                 case 1: enabled = 0; break;
                 case 2: enabled = 1; break;
                 case 3: root = dget(file->f_vfsmnt->mnt_sb->s_root);
-                        down(&root->d_inode->i_sem);
+                        mutex_lock(&root->d_inode->i_mutex);
 
                         while (!list_empty(&entries))
                                 kill_node(list_entry(entries.next, Node, list));
 
-                        up(&root->d_inode->i_sem);
+                        mutex_unlock(&root->d_inode->i_mutex);
                         dput(root);
                 default: return res;
         }
diff --git a/fs/block_dev.c b/fs/block_dev.c
index e0df94c37b7e..6e50346fb1ee 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -202,7 +202,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
         loff_t size;
         loff_t retval;
 
-        down(&bd_inode->i_sem);
+        mutex_lock(&bd_inode->i_mutex);
         size = i_size_read(bd_inode);
 
         switch (origin) {
@@ -219,7 +219,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
                 }
                 retval = offset;
         }
-        up(&bd_inode->i_sem);
+        mutex_unlock(&bd_inode->i_mutex);
         return retval;
 }
         
diff --git a/fs/buffer.c b/fs/buffer.c
index 55f0975a9b15..6466bc8a3dc7 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -352,11 +352,11 @@ static long do_fsync(unsigned int fd, int datasync)
          * We need to protect against concurrent writers,
          * which could cause livelocks in fsync_buffers_list
          */
-        down(&mapping->host->i_sem);
+        mutex_lock(&mapping->host->i_mutex);
         err = file->f_op->fsync(file, file->f_dentry, datasync);
         if (!ret)
                 ret = err;
-        up(&mapping->host->i_sem);
+        mutex_unlock(&mapping->host->i_mutex);
         err = filemap_fdatawait(mapping);
         if (!ret)
                 ret = err;
@@ -2338,7 +2338,7 @@ int generic_commit_write(struct file *file, struct page *page,
         __block_commit_write(inode,page,from,to);
         /*
          * No need to use i_size_read() here, the i_size
-         * cannot change under us because we hold i_sem.
+         * cannot change under us because we hold i_mutex.
          */
         if (pos > inode->i_size) {
                 i_size_write(inode, pos);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 2a13a2bac8f1..e10213b7541e 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -860,9 +860,9 @@ static int cifs_oplock_thread(void * dummyarg)
                                 DeleteOplockQEntry(oplock_item);
                                 /* can not grab inode sem here since it would
                                 deadlock when oplock received on delete 
-                                since vfs_unlink holds the i_sem across
+                                since vfs_unlink holds the i_mutex across
                                 the call */
-                                /* down(&inode->i_sem);*/
+                                /* mutex_lock(&inode->i_mutex);*/
                                 if (S_ISREG(inode->i_mode)) {
                                         rc = filemap_fdatawrite(inode->i_mapping);
                                         if(CIFS_I(inode)->clientCanCacheRead == 0) {
@@ -871,7 +871,7 @@ static int cifs_oplock_thread(void * dummyarg)
                                         }
                                 } else
                                         rc = 0;
-                                /* up(&inode->i_sem);*/
+                                /* mutex_unlock(&inode->i_mutex);*/
                                 if (rc)
                                         CIFS_I(inode)->write_behind_rc = rc;
                                 cFYI(1,("Oplock flush inode %p rc %d",inode,rc));
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 9558f51bca55..3ebce9430f4a 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1040,9 +1040,9 @@ int cifs_revalidate(struct dentry *direntry)
         }
 
         /* can not grab this sem since kernel filesys locking documentation
-           indicates i_sem may be taken by the kernel on lookup and rename
-           which could deadlock if we grab the i_sem here as well */
-/*      down(&direntry->d_inode->i_sem);*/
+           indicates i_mutex may be taken by the kernel on lookup and rename
+           which could deadlock if we grab the i_mutex here as well */
+/*      mutex_lock(&direntry->d_inode->i_mutex);*/
         /* need to write out dirty pages here  */
         if (direntry->d_inode->i_mapping) {
                 /* do we need to lock inode until after invalidate completes
@@ -1066,7 +1066,7 @@ int cifs_revalidate(struct dentry *direntry)
                         }
                 }
         }
-/*      up(&direntry->d_inode->i_sem); */
+/*      mutex_unlock(&direntry->d_inode->i_mutex); */
         
         kfree(full_path);
         FreeXid(xid);
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 2391766e9c7c..8f1a517f8b4e 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -453,7 +453,7 @@ int coda_readdir(struct file *coda_file, void *dirent, filldir_t filldir)
         coda_vfs_stat.readdir++;
 
         host_inode = host_file->f_dentry->d_inode;
-        down(&host_inode->i_sem);
+        mutex_lock(&host_inode->i_mutex);
         host_file->f_pos = coda_file->f_pos;
 
         if (!host_file->f_op->readdir) {
@@ -475,7 +475,7 @@ int coda_readdir(struct file *coda_file, void *dirent, filldir_t filldir)
         }
 out:
         coda_file->f_pos = host_file->f_pos;
-        up(&host_inode->i_sem);
+        mutex_unlock(&host_inode->i_mutex);
 
         return ret;
 }
diff --git a/fs/coda/file.c b/fs/coda/file.c
index e6bc022568f3..30b4630bd735 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -77,14 +77,14 @@ coda_file_write(struct file *coda_file, const char __user *buf, size_t count, lo
                 return -EINVAL;
 
         host_inode = host_file->f_dentry->d_inode;
-        down(&coda_inode->i_sem);
+        mutex_lock(&coda_inode->i_mutex);
 
         ret = host_file->f_op->write(host_file, buf, count, ppos);
 
         coda_inode->i_size = host_inode->i_size;
         coda_inode->i_blocks = (coda_inode->i_size + 511) >> 9;
         coda_inode->i_mtime = coda_inode->i_ctime = CURRENT_TIME_SEC;
-        up(&coda_inode->i_sem);
+        mutex_unlock(&coda_inode->i_mutex);
 
         return ret;
 }
@@ -272,9 +272,9 @@ int coda_fsync(struct file *coda_file, struct dentry *coda_dentry, int datasync)
         if (host_file->f_op && host_file->f_op->fsync) {
                 host_dentry = host_file->f_dentry;
                 host_inode = host_dentry->d_inode;
-                down(&host_inode->i_sem);
+                mutex_lock(&host_inode->i_mutex);
                 err = host_file->f_op->fsync(host_file, host_dentry, datasync);
-                up(&host_inode->i_sem);
+                mutex_unlock(&host_inode->i_mutex);
         }
 
         if ( !err && !datasync ) {
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index e48b539243a1..b668ec61527e 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -288,10 +288,10 @@ static struct dentry * configfs_lookup(struct inode *dir,
 
 /*
  * Only subdirectories count here.  Files (CONFIGFS_NOT_PINNED) are
- * attributes and are removed by rmdir().  We recurse, taking i_sem
+ * attributes and are removed by rmdir().  We recurse, taking i_mutex
  * on all children that are candidates for default detach.  If the
  * result is clean, then configfs_detach_group() will handle dropping
- * i_sem.  If there is an error, the caller will clean up the i_sem
+ * i_mutex.  If there is an error, the caller will clean up the i_mutex
  * holders via configfs_detach_rollback().
  */
 static int configfs_detach_prep(struct dentry *dentry)
@@ -309,8 +309,8 @@ static int configfs_detach_prep(struct dentry *dentry)
                 if (sd->s_type & CONFIGFS_NOT_PINNED)
                         continue;
                 if (sd->s_type & CONFIGFS_USET_DEFAULT) {
-                        down(&sd->s_dentry->d_inode->i_sem);
-                        /* Mark that we've taken i_sem */
+                        mutex_lock(&sd->s_dentry->d_inode->i_mutex);
+                        /* Mark that we've taken i_mutex */
                         sd->s_type |= CONFIGFS_USET_DROPPING;
 
                         ret = configfs_detach_prep(sd->s_dentry);
@@ -327,7 +327,7 @@ out:
 }
 
 /*
- * Walk the tree, dropping i_sem wherever CONFIGFS_USET_DROPPING is
+ * Walk the tree, dropping i_mutex wherever CONFIGFS_USET_DROPPING is
  * set.
  */
 static void configfs_detach_rollback(struct dentry *dentry)
@@ -341,7 +341,7 @@ static void configfs_detach_rollback(struct dentry *dentry)
 
                         if (sd->s_type & CONFIGFS_USET_DROPPING) {
                                 sd->s_type &= ~CONFIGFS_USET_DROPPING;
-                                up(&sd->s_dentry->d_inode->i_sem);
+                                mutex_unlock(&sd->s_dentry->d_inode->i_mutex);
                         }
                 }
         }
@@ -424,11 +424,11 @@ static void detach_groups(struct config_group *group)
 
                 /*
                  * From rmdir/unregister, a configfs_detach_prep() pass
-                 * has taken our i_sem for us.  Drop it.
+                 * has taken our i_mutex for us.  Drop it.
                  * From mkdir/register cleanup, there is no sem held.
                  */
                 if (sd->s_type & CONFIGFS_USET_DROPPING)
-                        up(&child->d_inode->i_sem);
+                        mutex_unlock(&child->d_inode->i_mutex);
 
                 d_delete(child);
                 dput(child);
@@ -493,11 +493,11 @@ static int populate_groups(struct config_group *group)
                 /* FYI, we're faking mkdir here
                  * I'm not sure we need this semaphore, as we're called
                  * from our parent's mkdir.  That holds our parent's
-                 * i_sem, so afaik lookup cannot continue through our
+                 * i_mutex, so afaik lookup cannot continue through our
                  * parent to find us, let alone mess with our tree.
-                 * That said, taking our i_sem is closer to mkdir
+                 * That said, taking our i_mutex is closer to mkdir
                  * emulation, and shouldn't hurt. */
-                down(&dentry->d_inode->i_sem);
+                mutex_lock(&dentry->d_inode->i_mutex);
 
                 for (i = 0; group->default_groups[i]; i++) {
                         new_group = group->default_groups[i];
@@ -507,7 +507,7 @@ static int populate_groups(struct config_group *group)
                                 break;
                 }
 
-                up(&dentry->d_inode->i_sem);
+                mutex_unlock(&dentry->d_inode->i_mutex);
         }
 
         if (ret)
@@ -856,7 +856,7 @@ int configfs_rename_dir(struct config_item * item, const char *new_name)
         down_write(&configfs_rename_sem);
         parent = item->parent->dentry;
 
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
 
         new_dentry = lookup_one_len(new_name, parent, strlen(new_name));
         if (!IS_ERR(new_dentry)) {
@@ -872,7 +872,7 @@ int configfs_rename_dir(struct config_item * item, const char *new_name)
                         error = -EEXIST;
                 dput(new_dentry);
         }
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
         up_write(&configfs_rename_sem);
 
         return error;
@@ -884,9 +884,9 @@ static int configfs_dir_open(struct inode *inode, struct file *file)
         struct dentry * dentry = file->f_dentry;
         struct configfs_dirent * parent_sd = dentry->d_fsdata;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         file->private_data = configfs_new_dirent(parent_sd, NULL);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         return file->private_data ? 0 : -ENOMEM;
 
@@ -897,9 +897,9 @@ static int configfs_dir_close(struct inode *inode, struct file *file)
         struct dentry * dentry = file->f_dentry;
         struct configfs_dirent * cursor = file->private_data;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         list_del_init(&cursor->s_sibling);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         release_configfs_dirent(cursor);
 
@@ -975,7 +975,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
 {
         struct dentry * dentry = file->f_dentry;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         switch (origin) {
                 case 1:
                         offset += file->f_pos;
@@ -983,7 +983,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
                         if (offset >= 0)
                                 break;
                 default:
-                        up(&file->f_dentry->d_inode->i_sem);
+                        mutex_unlock(&file->f_dentry->d_inode->i_mutex);
                         return -EINVAL;
         }
         if (offset != file->f_pos) {
@@ -1007,7 +1007,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
                         list_add_tail(&cursor->s_sibling, p);
                 }
         }
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
         return offset;
 }
 
@@ -1037,7 +1037,7 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
         sd = configfs_sb->s_root->d_fsdata;
         link_group(to_config_group(sd->s_element), group);
 
-        down(&configfs_sb->s_root->d_inode->i_sem);
+        mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
 
         name.name = group->cg_item.ci_name;
         name.len = strlen(name.name);
@@ -1057,7 +1057,7 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
         else
                 d_delete(dentry);
 
-        up(&configfs_sb->s_root->d_inode->i_sem);
+        mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
 
         if (dentry) {
             dput(dentry);
@@ -1079,18 +1079,18 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
                 return;
         }
 
-        down(&configfs_sb->s_root->d_inode->i_sem);
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
+        mutex_lock(&dentry->d_inode->i_mutex);
         if (configfs_detach_prep(dentry)) {
                 printk(KERN_ERR "configfs: Tried to unregister non-empty subsystem!\n");
         }
         configfs_detach_group(&group->cg_item);
         dentry->d_inode->i_flags |= S_DEAD;
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         d_delete(dentry);
 
-        up(&configfs_sb->s_root->d_inode->i_sem);
+        mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
 
         dput(dentry);
 
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index af1ffc9a15c0..c26cd61f13af 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -336,9 +336,9 @@ int configfs_add_file(struct dentry * dir, const struct configfs_attribute * att
         umode_t mode = (attr->ca_mode & S_IALLUGO) | S_IFREG;
         int error = 0;
 
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         error = configfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type);
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 
         return error;
 }
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index 6b274c6d428f..6577c588de9d 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -122,7 +122,7 @@ const unsigned char * configfs_get_name(struct configfs_dirent *sd)
 
 /*
  * Unhashes the dentry corresponding to given configfs_dirent
- * Called with parent inode's i_sem held.
+ * Called with parent inode's i_mutex held.
  */
 void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent)
 {
@@ -145,7 +145,7 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name)
         struct configfs_dirent * sd;
         struct configfs_dirent * parent_sd = dir->d_fsdata;
 
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
                 if (!sd->s_element)
                         continue;
@@ -156,7 +156,7 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name)
                         break;
                 }
         }
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 }
 
 
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index a86ac4aeaedb..d4f1a2cddd47 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -146,7 +146,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
         }
 
         *dentry = NULL;
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
         *dentry = lookup_one_len(name, parent, strlen(name));
         if (!IS_ERR(dentry)) {
                 if ((mode & S_IFMT) == S_IFDIR)
@@ -155,7 +155,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
                         error = debugfs_create(parent->d_inode, *dentry, mode);
         } else
                 error = PTR_ERR(dentry);
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
 
         return error;
 }
@@ -273,7 +273,7 @@ void debugfs_remove(struct dentry *dentry)
         if (!parent || !parent->d_inode)
                 return;
 
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
         if (debugfs_positive(dentry)) {
                 if (dentry->d_inode) {
                         if (S_ISDIR(dentry->d_inode->i_mode))
@@ -283,7 +283,7 @@ void debugfs_remove(struct dentry *dentry)
                 dput(dentry);
                 }
         }
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
         simple_release_fs(&debugfs_mount, &debugfs_mount_count);
 }
 EXPORT_SYMBOL_GPL(debugfs_remove);
diff --git a/fs/devfs/base.c b/fs/devfs/base.c
index 1274422a5384..b621521e09d4 100644
--- a/fs/devfs/base.c
+++ b/fs/devfs/base.c
@@ -2162,27 +2162,27 @@ static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
          *
          * make sure that
          *   d_instantiate always runs under lock
-         *   we release i_sem lock before going to sleep
+         *   we release i_mutex lock before going to sleep
          *
          * unfortunately sometimes d_revalidate is called with
-         * and sometimes without i_sem lock held. The following checks
+         * and sometimes without i_mutex lock held. The following checks
          * attempt to deduce when we need to add (and drop resp.) lock
          * here. This relies on current (2.6.2) calling coventions:
          *
-         *   lookup_hash is always run under i_sem and is passing NULL
+         *   lookup_hash is always run under i_mutex and is passing NULL
          *   as nd
          *
-         *   open(...,O_CREATE,...) calls _lookup_hash under i_sem
+         *   open(...,O_CREATE,...) calls _lookup_hash under i_mutex
          *   and sets flags to LOOKUP_OPEN|LOOKUP_CREATE
          *
          *   all other invocations of ->d_revalidate seem to happen
-         *   outside of i_sem
+         *   outside of i_mutex
          */
         need_lock = nd &&
             (!(nd->flags & LOOKUP_CREATE) || (nd->flags & LOOKUP_PARENT));
 
         if (need_lock)
-                down(&dir->i_sem);
+                mutex_lock(&dir->i_mutex);
 
         if (is_devfsd_or_child(fs_info)) {
                 devfs_handle_t de = lookup_info->de;
@@ -2221,9 +2221,9 @@ static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
                 add_wait_queue(&lookup_info->wait_queue, &wait);
                 read_unlock(&parent->u.dir.lock);
                 /* at this point it is always (hopefully) locked */
-                up(&dir->i_sem);
+                mutex_unlock(&dir->i_mutex);
                 schedule();
-                down(&dir->i_sem);
+                mutex_lock(&dir->i_mutex);
                 /*
                  * This does not need nor should remove wait from wait_queue.
                  * Wait queue head is never reused - nothing is ever added to it
@@ -2238,7 +2238,7 @@ static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
 
       out:
         if (need_lock)
-                up(&dir->i_sem);
+                mutex_unlock(&dir->i_mutex);
         return 1;
 }                               /*  End Function devfs_d_revalidate_wait  */
 
@@ -2284,9 +2284,9 @@ static struct dentry *devfs_lookup(struct inode *dir, struct dentry *dentry,
         /*  Unlock directory semaphore, which will release any waiters. They
            will get the hashed dentry, and may be forced to wait for
            revalidation  */
-        up(&dir->i_sem);
+        mutex_unlock(&dir->i_mutex);
         wait_for_devfsd_finished(fs_info);      /*  If I'm not devfsd, must wait  */
-        down(&dir->i_sem);      /*  Grab it again because them's the rules  */
+        mutex_lock(&dir->i_mutex);      /*  Grab it again because them's the rules  */
         de = lookup_info.de;
         /*  If someone else has been so kind as to make the inode, we go home
            early  */
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index f2be44d4491f..bfb8a230bac9 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -130,7 +130,7 @@ static struct dentry *get_node(int num)
 {
         char s[12];
         struct dentry *root = devpts_root;
-        down(&root->d_inode->i_sem);
+        mutex_lock(&root->d_inode->i_mutex);
         return lookup_one_len(s, root, sprintf(s, "%d", num));
 }
 
@@ -161,7 +161,7 @@ int devpts_pty_new(struct tty_struct *tty)
         if (!IS_ERR(dentry) && !dentry->d_inode)
                 d_instantiate(dentry, inode);
 
-        up(&devpts_root->d_inode->i_sem);
+        mutex_unlock(&devpts_root->d_inode->i_mutex);
 
         return 0;
 }
@@ -178,7 +178,7 @@ struct tty_struct *devpts_get_tty(int number)
                 dput(dentry);
         }
 
-        up(&devpts_root->d_inode->i_sem);
+        mutex_unlock(&devpts_root->d_inode->i_mutex);
 
         return tty;
 }
@@ -196,7 +196,7 @@ void devpts_pty_kill(int number)
                 }
                 dput(dentry);
         }
-        up(&devpts_root->d_inode->i_sem);
+        mutex_unlock(&devpts_root->d_inode->i_mutex);
 }
 
 static int __init init_devpts_fs(void)
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 3931e7f1e6bf..30dbbd1df511 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -56,7 +56,7 @@
  * lock_type is DIO_LOCKING for regular files on direct-IO-naive filesystems.
  * This determines whether we need to do the fancy locking which prevents
  * direct-IO from being able to read uninitialised disk blocks.  If its zero
- * (blockdev) this locking is not done, and if it is DIO_OWN_LOCKING i_sem is
+ * (blockdev) this locking is not done, and if it is DIO_OWN_LOCKING i_mutex is
  * not held for the entire direct write (taken briefly, initially, during a
  * direct read though, but its never held for the duration of a direct-IO).
  */
@@ -930,7 +930,7 @@ out:
 }
 
 /*
- * Releases both i_sem and i_alloc_sem
+ * Releases both i_mutex and i_alloc_sem
  */
 static ssize_t
 direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode, 
@@ -1062,11 +1062,11 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
 
         /*
          * All block lookups have been performed. For READ requests
-         * we can let i_sem go now that its achieved its purpose
+         * we can let i_mutex go now that its achieved its purpose
          * of protecting us from looking up uninitialized blocks.
          */
         if ((rw == READ) && (dio->lock_type == DIO_LOCKING))
-                up(&dio->inode->i_sem);
+                mutex_unlock(&dio->inode->i_mutex);
 
         /*
          * OK, all BIOs are submitted, so we can decrement bio_count to truly
@@ -1145,18 +1145,18 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
  * The locking rules are governed by the dio_lock_type parameter.
  *
  * DIO_NO_LOCKING (no locking, for raw block device access)
- * For writes, i_sem is not held on entry; it is never taken.
+ * For writes, i_mutex is not held on entry; it is never taken.
  *
  * DIO_LOCKING (simple locking for regular files)
- * For writes we are called under i_sem and return with i_sem held, even though
+ * For writes we are called under i_mutex and return with i_mutex held, even though
  * it is internally dropped.
- * For reads, i_sem is not held on entry, but it is taken and dropped before
+ * For reads, i_mutex is not held on entry, but it is taken and dropped before
  * returning.
  *
  * DIO_OWN_LOCKING (filesystem provides synchronisation and handling of
  *      uninitialised data, allowing parallel direct readers and writers)
- * For writes we are called without i_sem, return without it, never touch it.
- * For reads, i_sem is held on entry and will be released before returning.
+ * For writes we are called without i_mutex, return without it, never touch it.
+ * For reads, i_mutex is held on entry and will be released before returning.
  *
  * Additional i_alloc_sem locking requirements described inline below.
  */
@@ -1214,11 +1214,11 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
          * For block device access DIO_NO_LOCKING is used,
          *      neither readers nor writers do any locking at all
          * For regular files using DIO_LOCKING,
-         *      readers need to grab i_sem and i_alloc_sem
-         *      writers need to grab i_alloc_sem only (i_sem is already held)
+         *      readers need to grab i_mutex and i_alloc_sem
+         *      writers need to grab i_alloc_sem only (i_mutex is already held)
          * For regular files using DIO_OWN_LOCKING,
          *      neither readers nor writers take any locks here
-         *      (i_sem is already held and release for writers here)
+         *      (i_mutex is already held and release for writers here)
          */
         dio->lock_type = dio_lock_type;
         if (dio_lock_type != DIO_NO_LOCKING) {
@@ -1228,7 +1228,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 
                         mapping = iocb->ki_filp->f_mapping;
                         if (dio_lock_type != DIO_OWN_LOCKING) {
-                                down(&inode->i_sem);
+                                mutex_lock(&inode->i_mutex);
                                 reader_with_isem = 1;
                         }
 
@@ -1240,7 +1240,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
                         }
 
                         if (dio_lock_type == DIO_OWN_LOCKING) {
-                                up(&inode->i_sem);
+                                mutex_unlock(&inode->i_mutex);
                                 reader_with_isem = 0;
                         }
                 }
@@ -1266,7 +1266,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 
 out:
         if (reader_with_isem)
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
         if (rw & WRITE)
                 current->flags &= ~PF_SYNCWRITE;
         return retval;
diff --git a/fs/dquot.c b/fs/dquot.c
index 2a62b3dc20ec..cb6d5bfbdfd5 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -100,7 +100,7 @@
  * operation is just reading pointers from inode (or not using them at all) the
  * read lock is enough. If pointers are altered function must hold write lock
  * (these locking rules also apply for S_NOQUOTA flag in the inode - note that
- * for altering the flag i_sem is also needed).  If operation is holding
+ * for altering the flag i_mutex is also needed).  If operation is holding
  * reference to dquot in other way (e.g. quotactl ops) it must be guarded by
  * dqonoff_sem.
  * This locking assures that:
@@ -117,9 +117,9 @@
  * spinlock to internal buffers before writing.
  *
  * Lock ordering (including related VFS locks) is the following:
- *   i_sem > dqonoff_sem > iprune_sem > journal_lock > dqptr_sem >
+ *   i_mutex > dqonoff_sem > iprune_sem > journal_lock > dqptr_sem >
  *   > dquot->dq_lock > dqio_sem
- * i_sem on quota files is special (it's below dqio_sem)
+ * i_mutex on quota files is special (it's below dqio_sem)
  */
 
 static DEFINE_SPINLOCK(dq_list_lock);
@@ -1369,11 +1369,11 @@ int vfs_quota_off(struct super_block *sb, int type)
                         /* If quota was reenabled in the meantime, we have
                          * nothing to do */
                         if (!sb_has_quota_enabled(sb, cnt)) {
-                                down(&toputinode[cnt]->i_sem);
+                                mutex_lock(&toputinode[cnt]->i_mutex);
                                 toputinode[cnt]->i_flags &= ~(S_IMMUTABLE |
                                   S_NOATIME | S_NOQUOTA);
                                 truncate_inode_pages(&toputinode[cnt]->i_data, 0);
-                                up(&toputinode[cnt]->i_sem);
+                                mutex_unlock(&toputinode[cnt]->i_mutex);
                                 mark_inode_dirty(toputinode[cnt]);
                                 iput(toputinode[cnt]);
                         }
@@ -1417,7 +1417,7 @@ static int vfs_quota_on_inode(struct inode *inode, int type, int format_id)
         write_inode_now(inode, 1);
         /* And now flush the block cache so that kernel sees the changes */
         invalidate_bdev(sb->s_bdev, 0);
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         down(&dqopt->dqonoff_sem);
         if (sb_has_quota_enabled(sb, type)) {
                 error = -EBUSY;
@@ -1449,7 +1449,7 @@ static int vfs_quota_on_inode(struct inode *inode, int type, int format_id)
                 goto out_file_init;
         }
         up(&dqopt->dqio_sem);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         set_enable_flags(dqopt, type);
 
         add_dquot_ref(sb, type);
@@ -1470,7 +1470,7 @@ out_lock:
                 inode->i_flags |= oldflags;
                 up_write(&dqopt->dqptr_sem);
         }
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 out_fmt:
         put_quota_format(fmt);
 
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index c49d6254379a..5bfe40085fbc 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -177,9 +177,9 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
                         struct dentry *ppd;
                         struct dentry *npd;
 
-                        down(&pd->d_inode->i_sem);
+                        mutex_lock(&pd->d_inode->i_mutex);
                         ppd = CALL(nops,get_parent)(pd);
-                        up(&pd->d_inode->i_sem);
+                        mutex_unlock(&pd->d_inode->i_mutex);
 
                         if (IS_ERR(ppd)) {
                                 err = PTR_ERR(ppd);
@@ -201,9 +201,9 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
                                 break;
                         }
                         dprintk("find_exported_dentry: found name: %s\n", nbuf);
-                        down(&ppd->d_inode->i_sem);
+                        mutex_lock(&ppd->d_inode->i_mutex);
                         npd = lookup_one_len(nbuf, ppd, strlen(nbuf));
-                        up(&ppd->d_inode->i_sem);
+                        mutex_unlock(&ppd->d_inode->i_mutex);
                         if (IS_ERR(npd)) {
                                 err = PTR_ERR(npd);
                                 dprintk("find_exported_dentry: lookup failed: %d\n", err);
@@ -242,9 +242,9 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
                 struct dentry *nresult;
                 err = CALL(nops,get_name)(target_dir, nbuf, result);
                 if (!err) {
-                        down(&target_dir->d_inode->i_sem);
+                        mutex_lock(&target_dir->d_inode->i_mutex);
                         nresult = lookup_one_len(nbuf, target_dir, strlen(nbuf));
-                        up(&target_dir->d_inode->i_sem);
+                        mutex_unlock(&target_dir->d_inode->i_mutex);
                         if (!IS_ERR(nresult)) {
                                 if (nresult->d_inode) {
                                         dput(result);
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 6af2f4130290..239133d01d91 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -149,7 +149,7 @@ ext2_iset_acl(struct inode *inode, struct posix_acl **i_acl,
 }
 
 /*
- * inode->i_sem: don't care
+ * inode->i_mutex: don't care
  */
 static struct posix_acl *
 ext2_get_acl(struct inode *inode, int type)
@@ -211,7 +211,7 @@ ext2_get_acl(struct inode *inode, int type)
 }
 
 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 static int
 ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
@@ -301,8 +301,8 @@ ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
 /*
  * Initialize the ACLs of a new inode. Called from ext2_new_inode.
  *
- * dir->i_sem: down
- * inode->i_sem: up (access to inode is still exclusive)
+ * dir->i_mutex: down
+ * inode->i_mutex: up (access to inode is still exclusive)
  */
 int
 ext2_init_acl(struct inode *inode, struct inode *dir)
@@ -361,7 +361,7 @@ cleanup:
  * for directories) are added. There are no more bits available in the
  * file mode.
  *
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 int
 ext2_acl_chmod(struct inode *inode)
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index e977f8566d14..00de0a7312a2 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -53,7 +53,7 @@ struct ext2_inode_info {
 #ifdef CONFIG_EXT2_FS_XATTR
         /*
          * Extended attributes can be read independently of the main file
-         * data. Taking i_sem even when reading would cause contention
+         * data. Taking i_mutex even when reading would cause contention
          * between readers of EAs and writers of regular file data, so
          * instead we synchronize on xattr_sem when reading or changing
          * EAs.
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 522fa70dd8ea..8d6819846fc9 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1152,7 +1152,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
         struct buffer_head tmp_bh;
         struct buffer_head *bh;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         while (towrite > 0) {
                 tocopy = sb->s_blocksize - offset < towrite ?
                                 sb->s_blocksize - offset : towrite;
@@ -1189,7 +1189,7 @@ out:
         inode->i_version++;
         inode->i_mtime = inode->i_ctime = CURRENT_TIME;
         mark_inode_dirty(inode);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return len - towrite;
 }
 
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 0099462d4271..f7a3b5fee274 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -325,7 +325,7 @@ cleanup:
 /*
  * Inode operation listxattr()
  *
- * dentry->d_inode->i_sem: don't care
+ * dentry->d_inode->i_mutex: don't care
  */
 ssize_t
 ext2_listxattr(struct dentry *dentry, char *buffer, size_t size)
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 3ac38266fc9e..9ed132c96034 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -152,7 +152,7 @@ ext3_iset_acl(struct inode *inode, struct posix_acl **i_acl,
 /*
  * Inode operation get_posix_acl().
  *
- * inode->i_sem: don't care
+ * inode->i_mutex: don't care
  */
 static struct posix_acl *
 ext3_get_acl(struct inode *inode, int type)
@@ -216,7 +216,7 @@ ext3_get_acl(struct inode *inode, int type)
 /*
  * Set the access or default ACL of an inode.
  *
- * inode->i_sem: down unless called from ext3_new_inode
+ * inode->i_mutex: down unless called from ext3_new_inode
  */
 static int
 ext3_set_acl(handle_t *handle, struct inode *inode, int type,
@@ -306,8 +306,8 @@ ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
 /*
  * Initialize the ACLs of a new inode. Called from ext3_new_inode.
  *
- * dir->i_sem: down
- * inode->i_sem: up (access to inode is still exclusive)
+ * dir->i_mutex: down
+ * inode->i_mutex: up (access to inode is still exclusive)
  */
 int
 ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
@@ -368,7 +368,7 @@ cleanup:
  * for directories) are added. There are no more bits available in the
  * file mode.
  *
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 int
 ext3_acl_chmod(struct inode *inode)
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 7c45acf94589..c3dbebdb9897 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2601,7 +2601,7 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
         struct buffer_head *bh;
         handle_t *handle = journal_current_handle();
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         while (towrite > 0) {
                 tocopy = sb->s_blocksize - offset < towrite ?
                                 sb->s_blocksize - offset : towrite;
@@ -2644,7 +2644,7 @@ out:
         inode->i_version++;
         inode->i_mtime = inode->i_ctime = CURRENT_TIME;
         ext3_mark_inode_dirty(handle, inode);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return len - towrite;
 }
 
diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index 430de9f63be3..238199d82ce5 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -140,7 +140,7 @@ ext3_xattr_handler(int name_index)
 /*
  * Inode operation listxattr()
  *
- * dentry->d_inode->i_sem: don't care
+ * dentry->d_inode->i_mutex: don't care
  */
 ssize_t
 ext3_listxattr(struct dentry *dentry, char *buffer, size_t size)
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index eef1b81aa294..db0de5c621c7 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -729,13 +729,13 @@ static int fat_dir_ioctl(struct inode * inode, struct file * filp,
 
         buf.dirent = d1;
         buf.result = 0;
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         ret = -ENOENT;
         if (!IS_DEADDIR(inode)) {
                 ret = __fat_readdir(inode, filp, &buf, fat_ioctl_filldir,
                                     short_only, both);
         }
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         if (ret >= 0)
                 ret = buf.result;
         return ret;
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 9b07c328a6fc..d30876cf35f5 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -41,7 +41,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
                 if (err)
                         return err;
 
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
 
                 if (IS_RDONLY(inode)) {
                         err = -EROFS;
@@ -103,7 +103,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
                 MSDOS_I(inode)->i_attrs = attr & ATTR_UNUSED;
                 mark_inode_dirty(inode);
         up:
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
                 return err;
         }
         default:
diff --git a/fs/fifo.c b/fs/fifo.c
index 5455916241f0..923371b753ab 100644
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -35,7 +35,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
         int ret;
 
         ret = -ERESTARTSYS;
-        if (down_interruptible(PIPE_SEM(*inode)))
+        if (mutex_lock_interruptible(PIPE_MUTEX(*inode)))
                 goto err_nolock_nocleanup;
 
         if (!inode->i_pipe) {
@@ -119,7 +119,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
         }
 
         /* Ok! */
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
         return 0;
 
 err_rd:
@@ -139,7 +139,7 @@ err:
                 free_pipe_info(inode);
 
 err_nocleanup:
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
 err_nolock_nocleanup:
         return ret;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 05dedddf4289..63d2980df5c9 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -560,9 +560,9 @@ static ssize_t fuse_direct_write(struct file *file, const char __user *buf,
         struct inode *inode = file->f_dentry->d_inode;
         ssize_t res;
         /* Don't allow parallel writes to the same file */
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         res = fuse_direct_io(file, buf, count, ppos, 1);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return res;
 }
 
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index d499393a8ae7..050a49276499 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -547,13 +547,13 @@ static int hfs_file_release(struct inode *inode, struct file *file)
         if (atomic_read(&file->f_count) != 0)
                 return 0;
         if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
                 hfs_file_truncate(inode);
                 //if (inode->i_flags & S_DEAD) {
                 //      hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
                 //      hfs_delete_inode(inode);
                 //}
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
         }
         return 0;
 }
diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
index c7d316455fa0..9fb51632303c 100644
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@@ -29,7 +29,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *ma
                 return size;
 
         dprint(DBG_BITMAP, "block_allocate: %u,%u,%u\n", size, offset, len);
-        down(&HFSPLUS_SB(sb).alloc_file->i_sem);
+        mutex_lock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
         mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
         page = read_cache_page(mapping, offset / PAGE_CACHE_BITS,
                                (filler_t *)mapping->a_ops->readpage, NULL);
@@ -143,7 +143,7 @@ done:
         sb->s_dirt = 1;
         dprint(DBG_BITMAP, "-> %u,%u\n", start, *max);
 out:
-        up(&HFSPLUS_SB(sb).alloc_file->i_sem);
+        mutex_unlock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
         return start;
 }
 
@@ -164,7 +164,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
         if ((offset + count) > HFSPLUS_SB(sb).total_blocks)
                 return -2;
 
-        down(&HFSPLUS_SB(sb).alloc_file->i_sem);
+        mutex_lock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
         mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
         pnr = offset / PAGE_CACHE_BITS;
         page = read_cache_page(mapping, pnr, (filler_t *)mapping->a_ops->readpage, NULL);
@@ -215,7 +215,7 @@ out:
         kunmap(page);
         HFSPLUS_SB(sb).free_blocks += len;
         sb->s_dirt = 1;
-        up(&HFSPLUS_SB(sb).alloc_file->i_sem);
+        mutex_unlock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
 
         return 0;
 }
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index fc98583cf045..983bcd02ac1c 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -276,13 +276,13 @@ static int hfsplus_file_release(struct inode *inode, struct file *file)
         if (atomic_read(&file->f_count) != 0)
                 return 0;
         if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
                 hfsplus_file_truncate(inode);
                 if (inode->i_flags & S_DEAD) {
                         hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
                         hfsplus_delete_inode(inode);
                 }
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
         }
         return 0;
 }
diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
index 0217c3a04441..5591f9623aa2 100644
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@@ -32,19 +32,19 @@ static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
 
         /*printk("dir lseek\n");*/
         if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok;
-        down(&i->i_sem);
+        mutex_lock(&i->i_mutex);
         pos = ((loff_t) hpfs_de_as_down_as_possible(s, hpfs_inode->i_dno) << 4) + 1;
         while (pos != new_off) {
                 if (map_pos_dirent(i, &pos, &qbh)) hpfs_brelse4(&qbh);
                 else goto fail;
                 if (pos == 12) goto fail;
         }
-        up(&i->i_sem);
+        mutex_unlock(&i->i_mutex);
 ok:
         unlock_kernel();
         return filp->f_pos = new_off;
 fail:
-        up(&i->i_sem);
+        mutex_unlock(&i->i_mutex);
         /*printk("illegal lseek: %016llx\n", new_off);*/
         unlock_kernel();
         return -ESPIPE;
diff --git a/fs/hppfs/hppfs_kern.c b/fs/hppfs/hppfs_kern.c
index 52930915bad8..a44dc5897399 100644
--- a/fs/hppfs/hppfs_kern.c
+++ b/fs/hppfs/hppfs_kern.c
@@ -171,12 +171,12 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
 
         err = -ENOMEM;
         parent = HPPFS_I(ino)->proc_dentry;
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
         proc_dentry = d_lookup(parent, &dentry->d_name);
         if(proc_dentry == NULL){
                 proc_dentry = d_alloc(parent, &dentry->d_name);
                 if(proc_dentry == NULL){
-                        up(&parent->d_inode->i_sem);
+                        mutex_unlock(&parent->d_inode->i_mutex);
                         goto out;
                 }
                 new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
@@ -186,7 +186,7 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
                         proc_dentry = new;
                 }
         }
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
 
         if(IS_ERR(proc_dentry))
                 return(proc_dentry);
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 8c41315a6e42..ff1b7d108bd0 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -118,7 +118,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 
         vma_len = (loff_t)(vma->vm_end - vma->vm_start);
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         file_accessed(file);
         vma->vm_flags |= VM_HUGETLB | VM_RESERVED;
         vma->vm_ops = &hugetlb_vm_ops;
@@ -133,7 +133,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
         if (inode->i_size < len)
                 inode->i_size = len;
 out:
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 
         return ret;
 }
diff --git a/fs/inode.c b/fs/inode.c
index fd568caf7f74..e08767fd57b0 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -192,7 +192,7 @@ void inode_init_once(struct inode *inode)
         INIT_HLIST_NODE(&inode->i_hash);
         INIT_LIST_HEAD(&inode->i_dentry);
         INIT_LIST_HEAD(&inode->i_devices);
-        sema_init(&inode->i_sem, 1);
+        mutex_init(&inode->i_mutex);
         init_rwsem(&inode->i_alloc_sem);
         INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC);
         rwlock_init(&inode->i_data.tree_lock);
diff --git a/fs/jffs/inode-v23.c b/fs/jffs/inode-v23.c
index 2559ee10beda..fc3855a1aef3 100644
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -1415,7 +1415,7 @@ jffs_file_write(struct file *filp, const char *buf, size_t count,
          * This will never trigger with sane page sizes.  leave it in
          * anyway, since I'm thinking about how to merge larger writes
          * (the current idea is to poke a thread that does the actual
-         * I/O and starts by doing a down(&inode->i_sem).  then we
+         * I/O and starts by doing a mutex_lock(&inode->i_mutex).  then we
          * would need to get the page cache pages and have a list of
          * I/O requests and do write-merging here.
          * -- prumpf
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index c0fd7b3eadc6..dc21a5bd54d4 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -58,7 +58,7 @@ struct jfs_inode_info {
         /*
          * rdwrlock serializes xtree between reads & writes and synchronizes
          * changes to special inodes.  It's use would be redundant on
-         * directories since the i_sem taken in the VFS is sufficient.
+         * directories since the i_mutex taken in the VFS is sufficient.
          */
         struct rw_semaphore rdwrlock;
         /*
@@ -68,7 +68,7 @@ struct jfs_inode_info {
          * inode is blocked in txBegin or TxBeginAnon
          */
         struct semaphore commit_sem;
-        /* xattr_sem allows us to access the xattrs without taking i_sem */
+        /* xattr_sem allows us to access the xattrs without taking i_mutex */
         struct rw_semaphore xattr_sem;
         lid_t   xtlid;          /* lid of xtree lock on directory */
 #ifdef CONFIG_JFS_POSIX_ACL
diff --git a/fs/libfs.c b/fs/libfs.c
index 9c50523382e7..63c020e6589e 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -74,7 +74,7 @@ int dcache_dir_close(struct inode *inode, struct file *file)
 
 loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 {
-        down(&file->f_dentry->d_inode->i_sem);
+        mutex_lock(&file->f_dentry->d_inode->i_mutex);
         switch (origin) {
                 case 1:
                         offset += file->f_pos;
@@ -82,7 +82,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
                         if (offset >= 0)
                                 break;
                 default:
-                        up(&file->f_dentry->d_inode->i_sem);
+                        mutex_unlock(&file->f_dentry->d_inode->i_mutex);
                         return -EINVAL;
         }
         if (offset != file->f_pos) {
@@ -106,7 +106,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
                         spin_unlock(&dcache_lock);
                 }
         }
-        up(&file->f_dentry->d_inode->i_sem);
+        mutex_unlock(&file->f_dentry->d_inode->i_mutex);
         return offset;
 }
 
@@ -356,7 +356,7 @@ int simple_commit_write(struct file *file, struct page *page,
 
         /*
          * No need to use i_size_read() here, the i_size
-         * cannot change under us because we hold the i_sem.
+         * cannot change under us because we hold the i_mutex.
          */
         if (pos > inode->i_size)
                 i_size_write(inode, pos);
diff --git a/fs/namei.c b/fs/namei.c
index 300eae088d5f..0a8f073435af 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -438,7 +438,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
         struct dentry * result;
         struct inode *dir = parent->d_inode;
 
-        down(&dir->i_sem);
+        mutex_lock(&dir->i_mutex);
         /*
          * First re-do the cached lookup just in case it was created
          * while we waited for the directory semaphore..
@@ -464,7 +464,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
                         else
                                 result = dentry;
                 }
-                up(&dir->i_sem);
+                mutex_unlock(&dir->i_mutex);
                 return result;
         }
 
@@ -472,7 +472,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
          * Uhhuh! Nasty case: the cache was re-populated while
          * we waited on the semaphore. Need to revalidate.
          */
-        up(&dir->i_sem);
+        mutex_unlock(&dir->i_mutex);
         if (result->d_op && result->d_op->d_revalidate) {
                 if (!result->d_op->d_revalidate(result, nd) && !d_invalidate(result)) {
                         dput(result);
@@ -1366,7 +1366,7 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)
         struct dentry *p;
 
         if (p1 == p2) {
-                down(&p1->d_inode->i_sem);
+                mutex_lock(&p1->d_inode->i_mutex);
                 return NULL;
         }
 
@@ -1374,30 +1374,30 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)
 
         for (p = p1; p->d_parent != p; p = p->d_parent) {
                 if (p->d_parent == p2) {
-                        down(&p2->d_inode->i_sem);
-                        down(&p1->d_inode->i_sem);
+                        mutex_lock(&p2->d_inode->i_mutex);
+                        mutex_lock(&p1->d_inode->i_mutex);
                         return p;
                 }
         }
 
         for (p = p2; p->d_parent != p; p = p->d_parent) {
                 if (p->d_parent == p1) {
-                        down(&p1->d_inode->i_sem);
-                        down(&p2->d_inode->i_sem);
+                        mutex_lock(&p1->d_inode->i_mutex);
+                        mutex_lock(&p2->d_inode->i_mutex);
                         return p;
                 }
         }
 
-        down(&p1->d_inode->i_sem);
-        down(&p2->d_inode->i_sem);
+        mutex_lock(&p1->d_inode->i_mutex);
+        mutex_lock(&p2->d_inode->i_mutex);
         return NULL;
 }
 
 void unlock_rename(struct dentry *p1, struct dentry *p2)
 {
-        up(&p1->d_inode->i_sem);
+        mutex_unlock(&p1->d_inode->i_mutex);
         if (p1 != p2) {
-                up(&p2->d_inode->i_sem);
+                mutex_unlock(&p2->d_inode->i_mutex);
                 up(&p1->d_inode->i_sb->s_vfs_rename_sem);
         }
 }
@@ -1563,14 +1563,14 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
 
         dir = nd->dentry;
         nd->flags &= ~LOOKUP_PARENT;
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         path.dentry = lookup_hash(nd);
         path.mnt = nd->mnt;
 
 do_last:
         error = PTR_ERR(path.dentry);
         if (IS_ERR(path.dentry)) {
-                up(&dir->d_inode->i_sem);
+                mutex_unlock(&dir->d_inode->i_mutex);
                 goto exit;
         }
 
@@ -1579,7 +1579,7 @@ do_last:
                 if (!IS_POSIXACL(dir->d_inode))
                         mode &= ~current->fs->umask;
                 error = vfs_create(dir->d_inode, path.dentry, mode, nd);
-                up(&dir->d_inode->i_sem);
+                mutex_unlock(&dir->d_inode->i_mutex);
                 dput(nd->dentry);
                 nd->dentry = path.dentry;
                 if (error)
@@ -1593,7 +1593,7 @@ do_last:
         /*
          * It already exists.
          */
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 
         error = -EEXIST;
         if (flag & O_EXCL)
@@ -1665,7 +1665,7 @@ do_link:
                 goto exit;
         }
         dir = nd->dentry;
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         path.dentry = lookup_hash(nd);
         path.mnt = nd->mnt;
         __putname(nd->last.name);
@@ -1680,13 +1680,13 @@ do_link:
  * Simple function to lookup and return a dentry and create it
  * if it doesn't exist.  Is SMP-safe.
  *
- * Returns with nd->dentry->d_inode->i_sem locked.
+ * Returns with nd->dentry->d_inode->i_mutex locked.
  */
 struct dentry *lookup_create(struct nameidata *nd, int is_dir)
 {
         struct dentry *dentry = ERR_PTR(-EEXIST);
 
-        down(&nd->dentry->d_inode->i_sem);
+        mutex_lock(&nd->dentry->d_inode->i_mutex);
         /*
          * Yucky last component or no last component at all?
          * (foo/., foo/.., /////)
@@ -1784,7 +1784,7 @@ asmlinkage long sys_mknod(const char __user * filename, int mode, unsigned dev)
                 }
                 dput(dentry);
         }
-        up(&nd.dentry->d_inode->i_sem);
+        mutex_unlock(&nd.dentry->d_inode->i_mutex);
         path_release(&nd);
 out:
         putname(tmp);
@@ -1836,7 +1836,7 @@ asmlinkage long sys_mkdir(const char __user * pathname, int mode)
                         error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
                         dput(dentry);
                 }
-                up(&nd.dentry->d_inode->i_sem);
+                mutex_unlock(&nd.dentry->d_inode->i_mutex);
                 path_release(&nd);
 out:
                 putname(tmp);
@@ -1885,7 +1885,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 
         DQUOT_INIT(dir);
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         dentry_unhash(dentry);
         if (d_mountpoint(dentry))
                 error = -EBUSY;
@@ -1897,7 +1897,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
                                 dentry->d_inode->i_flags |= S_DEAD;
                 }
         }
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
         if (!error) {
                 d_delete(dentry);
         }
@@ -1932,14 +1932,14 @@ asmlinkage long sys_rmdir(const char __user * pathname)
                         error = -EBUSY;
                         goto exit1;
         }
-        down(&nd.dentry->d_inode->i_sem);
+        mutex_lock(&nd.dentry->d_inode->i_mutex);
         dentry = lookup_hash(&nd);
         error = PTR_ERR(dentry);
         if (!IS_ERR(dentry)) {
                 error = vfs_rmdir(nd.dentry->d_inode, dentry);
                 dput(dentry);
         }
-        up(&nd.dentry->d_inode->i_sem);
+        mutex_unlock(&nd.dentry->d_inode->i_mutex);
 exit1:
         path_release(&nd);
 exit:
@@ -1959,7 +1959,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 
         DQUOT_INIT(dir);
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         if (d_mountpoint(dentry))
                 error = -EBUSY;
         else {
@@ -1967,7 +1967,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
                 if (!error)
                         error = dir->i_op->unlink(dir, dentry);
         }
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         /* We don't d_delete() NFS sillyrenamed files--they still exist. */
         if (!error && !(dentry->d_flags & DCACHE_NFSFS_RENAMED)) {
@@ -1979,7 +1979,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 
 /*
  * Make sure that the actual truncation of the file will occur outside its
- * directory's i_sem.  Truncate can take a long time if there is a lot of
+ * directory's i_mutex.  Truncate can take a long time if there is a lot of
  * writeout happening, and we don't want to prevent access to the directory
  * while waiting on the I/O.
  */
@@ -2001,7 +2001,7 @@ asmlinkage long sys_unlink(const char __user * pathname)
         error = -EISDIR;
         if (nd.last_type != LAST_NORM)
                 goto exit1;
-        down(&nd.dentry->d_inode->i_sem);
+        mutex_lock(&nd.dentry->d_inode->i_mutex);
         dentry = lookup_hash(&nd);
         error = PTR_ERR(dentry);
         if (!IS_ERR(dentry)) {
@@ -2015,7 +2015,7 @@ asmlinkage long sys_unlink(const char __user * pathname)
         exit2:
                 dput(dentry);
         }
-        up(&nd.dentry->d_inode->i_sem);
+        mutex_unlock(&nd.dentry->d_inode->i_mutex);
         if (inode)
                 iput(inode);    /* truncate the inode here */
 exit1:
@@ -2075,7 +2075,7 @@ asmlinkage long sys_symlink(const char __user * oldname, const char __user * new
                         error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO);
                         dput(dentry);
                 }
-                up(&nd.dentry->d_inode->i_sem);
+                mutex_unlock(&nd.dentry->d_inode->i_mutex);
                 path_release(&nd);
 out:
                 putname(to);
@@ -2113,10 +2113,10 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
         if (error)
                 return error;
 
-        down(&old_dentry->d_inode->i_sem);
+        mutex_lock(&old_dentry->d_inode->i_mutex);
         DQUOT_INIT(dir);
         error = dir->i_op->link(old_dentry, dir, new_dentry);
-        up(&old_dentry->d_inode->i_sem);
+        mutex_unlock(&old_dentry->d_inode->i_mutex);
         if (!error)
                 fsnotify_create(dir, new_dentry->d_name.name);
         return error;
@@ -2157,7 +2157,7 @@ asmlinkage long sys_link(const char __user * oldname, const char __user * newnam
                 error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
                 dput(new_dentry);
         }
-        up(&nd.dentry->d_inode->i_sem);
+        mutex_unlock(&nd.dentry->d_inode->i_mutex);
 out_release:
         path_release(&nd);
 out:
@@ -2178,7 +2178,7 @@ exit:
  *         sb->s_vfs_rename_sem. We might be more accurate, but that's another
  *         story.
  *      c) we have to lock _three_ objects - parents and victim (if it exists).
- *         And that - after we got ->i_sem on parents (until then we don't know
+ *         And that - after we got ->i_mutex on parents (until then we don't know
  *         whether the target exists).  Solution: try to be smart with locking
  *         order for inodes.  We rely on the fact that tree topology may change
  *         only under ->s_vfs_rename_sem _and_ that parent of the object we
@@ -2195,9 +2195,9 @@ exit:
  *         stuff into VFS), but the former is not going away. Solution: the same
  *         trick as in rmdir().
  *      e) conversion from fhandle to dentry may come in the wrong moment - when
- *         we are removing the target. Solution: we will have to grab ->i_sem
+ *         we are removing the target. Solution: we will have to grab ->i_mutex
  *         in the fhandle_to_dentry code. [FIXME - current nfsfh.c relies on
- *         ->i_sem on parents, which works but leads to some truely excessive
+ *         ->i_mutex on parents, which works but leads to some truely excessive
  *         locking].
  */
 static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
@@ -2222,7 +2222,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
 
         target = new_dentry->d_inode;
         if (target) {
-                down(&target->i_sem);
+                mutex_lock(&target->i_mutex);
                 dentry_unhash(new_dentry);
         }
         if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
@@ -2232,7 +2232,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
         if (target) {
                 if (!error)
                         target->i_flags |= S_DEAD;
-                up(&target->i_sem);
+                mutex_unlock(&target->i_mutex);
                 if (d_unhashed(new_dentry))
                         d_rehash(new_dentry);
                 dput(new_dentry);
@@ -2255,7 +2255,7 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
         dget(new_dentry);
         target = new_dentry->d_inode;
         if (target)
-                down(&target->i_sem);
+                mutex_lock(&target->i_mutex);
         if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
                 error = -EBUSY;
         else
@@ -2266,7 +2266,7 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
                         d_move(old_dentry, new_dentry);
         }
         if (target)
-                up(&target->i_sem);
+                mutex_unlock(&target->i_mutex);
         dput(new_dentry);
         return error;
 }
diff --git a/fs/namespace.c b/fs/namespace.c
index 3e8fb61ad597..f0e353f5bc30 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -814,7 +814,7 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
                 return -ENOTDIR;
 
         err = -ENOENT;
-        down(&nd->dentry->d_inode->i_sem);
+        mutex_lock(&nd->dentry->d_inode->i_mutex);
         if (IS_DEADDIR(nd->dentry->d_inode))
                 goto out_unlock;
 
@@ -826,7 +826,7 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
         if (IS_ROOT(nd->dentry) || !d_unhashed(nd->dentry))
                 err = attach_recursive_mnt(mnt, nd, NULL);
 out_unlock:
-        up(&nd->dentry->d_inode->i_sem);
+        mutex_unlock(&nd->dentry->d_inode->i_mutex);
         if (!err)
                 security_sb_post_addmount(mnt, nd);
         return err;
@@ -962,7 +962,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
                 goto out;
 
         err = -ENOENT;
-        down(&nd->dentry->d_inode->i_sem);
+        mutex_lock(&nd->dentry->d_inode->i_mutex);
         if (IS_DEADDIR(nd->dentry->d_inode))
                 goto out1;
 
@@ -1004,7 +1004,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
         list_del_init(&old_nd.mnt->mnt_expire);
         spin_unlock(&vfsmount_lock);
 out1:
-        up(&nd->dentry->d_inode->i_sem);
+        mutex_unlock(&nd->dentry->d_inode->i_mutex);
 out:
         up_write(&namespace_sem);
         if (!err)
@@ -1573,7 +1573,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
         user_nd.dentry = dget(current->fs->root);
         read_unlock(&current->fs->lock);
         down_write(&namespace_sem);
-        down(&old_nd.dentry->d_inode->i_sem);
+        mutex_lock(&old_nd.dentry->d_inode->i_mutex);
         error = -EINVAL;
         if (IS_MNT_SHARED(old_nd.mnt) ||
                 IS_MNT_SHARED(new_nd.mnt->mnt_parent) ||
@@ -1626,7 +1626,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
         path_release(&root_parent);
         path_release(&parent_nd);
 out2:
-        up(&old_nd.dentry->d_inode->i_sem);
+        mutex_unlock(&old_nd.dentry->d_inode->i_mutex);
         up_write(&namespace_sem);
         path_release(&user_nd);
         path_release(&old_nd);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e9255198f767..a1554bead692 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -194,7 +194,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
         spin_unlock(&inode->i_lock);
         /* Ensure consistent page alignment of the data.
          * Note: assumes we have exclusive access to this mapping either
-         *       through inode->i_sem or some other mechanism.
+         *       through inode->i_mutex or some other mechanism.
          */
         if (page->index == 0)
                 invalidate_inode_pages2_range(inode->i_mapping, PAGE_CACHE_SIZE, -1);
@@ -573,7 +573,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
 loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
 {
-        down(&filp->f_dentry->d_inode->i_sem);
+        mutex_lock(&filp->f_dentry->d_inode->i_mutex);
         switch (origin) {
                 case 1:
                         offset += filp->f_pos;
@@ -589,7 +589,7 @@ loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
                 ((struct nfs_open_context *)filp->private_data)->dir_cookie = 0;
         }
 out:
-        up(&filp->f_dentry->d_inode->i_sem);
+        mutex_unlock(&filp->f_dentry->d_inode->i_mutex);
         return offset;
 }
 
@@ -1001,7 +1001,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
         openflags &= ~(O_CREAT|O_TRUNC);
 
         /*
-         * Note: we're not holding inode->i_sem and so may be racing with
+         * Note: we're not holding inode->i_mutex and so may be racing with
          * operations that change the directory. We therefore save the
          * change attribute *before* we do the RPC call.
          */
@@ -1051,7 +1051,7 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)
                 return dentry;
         if (!desc->plus || !(entry->fattr->valid & NFS_ATTR_FATTR))
                 return NULL;
-        /* Note: caller is already holding the dir->i_sem! */
+        /* Note: caller is already holding the dir->i_mutex! */
         dentry = d_alloc(parent, &name);
         if (dentry == NULL)
                 return NULL;
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 954cf893d50c..be963a133aaa 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -121,9 +121,9 @@ out:
 static void
 nfsd4_sync_rec_dir(void)
 {
-        down(&rec_dir.dentry->d_inode->i_sem);
+        mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
         nfsd_sync_dir(rec_dir.dentry);
-        up(&rec_dir.dentry->d_inode->i_sem);
+        mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
 }
 
 int
@@ -143,7 +143,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
         nfs4_save_user(&uid, &gid);
 
         /* lock the parent */
-        down(&rec_dir.dentry->d_inode->i_sem);
+        mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
 
         dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1);
         if (IS_ERR(dentry)) {
@@ -159,7 +159,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
 out_put:
         dput(dentry);
 out_unlock:
-        up(&rec_dir.dentry->d_inode->i_sem);
+        mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
         if (status == 0) {
                 clp->cl_firststate = 1;
                 nfsd4_sync_rec_dir();
@@ -259,9 +259,9 @@ nfsd4_remove_clid_file(struct dentry *dir, struct dentry *dentry)
                 printk("nfsd4: non-file found in client recovery directory\n");
                 return -EINVAL;
         }
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         status = vfs_unlink(dir->d_inode, dentry);
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
         return status;
 }
 
@@ -274,9 +274,9 @@ nfsd4_clear_clid_dir(struct dentry *dir, struct dentry *dentry)
          * any regular files anyway, just in case the directory was created by
          * a kernel from the future.... */
         nfsd4_list_rec_dir(dentry, nfsd4_remove_clid_file);
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         status = vfs_rmdir(dir->d_inode, dentry);
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
         return status;
 }
 
@@ -288,9 +288,9 @@ nfsd4_unlink_clid_dir(char *name, int namlen)
 
         dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
 
-        down(&rec_dir.dentry->d_inode->i_sem);
+        mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
         dentry = lookup_one_len(name, rec_dir.dentry, namlen);
-        up(&rec_dir.dentry->d_inode->i_sem);
+        mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
         if (IS_ERR(dentry)) {
                 status = PTR_ERR(dentry);
                 return status;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index df4019f04560..bb36b4304491 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -390,12 +390,12 @@ set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)
 
         error = -EOPNOTSUPP;
         if (inode->i_op && inode->i_op->setxattr) {
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
                 security_inode_setxattr(dentry, key, buf, len, 0);
                 error = inode->i_op->setxattr(dentry, key, buf, len, 0);
                 if (!error)
                         security_inode_post_setxattr(dentry, key, buf, len, 0);
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
         }
 out:
         kfree(buf);
@@ -739,9 +739,9 @@ nfsd_sync(struct file *filp)
         int err;
         struct inode *inode = filp->f_dentry->d_inode;
         dprintk("nfsd: sync file %s\n", filp->f_dentry->d_name.name);
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         err=nfsd_dosync(filp, filp->f_dentry, filp->f_op);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 
         return err;
 }
@@ -885,9 +885,9 @@ static void kill_suid(struct dentry *dentry)
         struct iattr    ia;
         ia.ia_valid = ATTR_KILL_SUID | ATTR_KILL_SGID;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         notify_change(dentry, &ia);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 }
 
 static inline int
diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index eda056bac256..9480a0526cd3 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -1532,7 +1532,7 @@ int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a,
  * NOTE to self: No changes in the attribute list are required to move from
  *               a resident to a non-resident attribute.
  *
- * Locking: - The caller must hold i_sem on the inode.
+ * Locking: - The caller must hold i_mutex on the inode.
  */
 int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
 {
@@ -1728,7 +1728,7 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
         /*
          * This needs to be last since the address space operations ->readpage
          * and ->writepage can run concurrently with us as they are not
-         * serialized on i_sem.  Note, we are not allowed to fail once we flip
+         * serialized on i_mutex.  Note, we are not allowed to fail once we flip
          * this switch, which is another reason to do this last.
          */
         NInoSetNonResident(ni);
diff --git a/fs/ntfs/dir.c b/fs/ntfs/dir.c
index 795c3d1930f5..b0690d4c8906 100644
--- a/fs/ntfs/dir.c
+++ b/fs/ntfs/dir.c
@@ -69,7 +69,7 @@ ntfschar I30[5] = { const_cpu_to_le16('$'), const_cpu_to_le16('I'),
  * work but we don't care for how quickly one can access them. This also fixes
  * the dcache aliasing issues.
  *
- * Locking:  - Caller must hold i_sem on the directory.
+ * Locking:  - Caller must hold i_mutex on the directory.
  *           - Each page cache page in the index allocation mapping must be
  *             locked whilst being accessed otherwise we may find a corrupt
  *             page due to it being under ->writepage at the moment which
@@ -1085,11 +1085,11 @@ static inline int ntfs_filldir(ntfs_volume *vol, loff_t fpos,
  * While this will return the names in random order this doesn't matter for
  * ->readdir but OTOH results in a faster ->readdir.
  *
- * VFS calls ->readdir without BKL but with i_sem held. This protects the VFS
+ * VFS calls ->readdir without BKL but with i_mutex held. This protects the VFS
  * parts (e.g. ->f_pos and ->i_size, and it also protects against directory
  * modifications).
  *
- * Locking:  - Caller must hold i_sem on the directory.
+ * Locking:  - Caller must hold i_mutex on the directory.
  *           - Each page cache page in the index allocation mapping must be
  *             locked whilst being accessed otherwise we may find a corrupt
  *             page due to it being under ->writepage at the moment which
@@ -1520,7 +1520,7 @@ static int ntfs_dir_open(struct inode *vi, struct file *filp)
  * Note: In the past @filp could be NULL so we ignore it as we don't need it
  * anyway.
  *
- * Locking: Caller must hold i_sem on the inode.
+ * Locking: Caller must hold i_mutex on the inode.
  *
  * TODO: We should probably also write all attribute/index inodes associated
  * with this inode but since we have no simple way of getting to them we ignore
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 727533891813..30f71acdc1cb 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -106,7 +106,7 @@ static int ntfs_file_open(struct inode *vi, struct file *filp)
  * this is the case, the necessary zeroing will also have happened and that all
  * metadata is self-consistent.
  *
- * Locking: i_sem on the vfs inode corrseponsind to the ntfs inode @ni must be
+ * Locking: i_mutex on the vfs inode corrseponsind to the ntfs inode @ni must be
  *          held by the caller.
  */
 static int ntfs_attr_extend_initialized(ntfs_inode *ni, const s64 new_init_size,
@@ -473,7 +473,7 @@ static inline int ntfs_submit_bh_for_read(struct buffer_head *bh)
  * @bytes:      number of bytes to be written
  *
  * This is called for non-resident attributes from ntfs_file_buffered_write()
- * with i_sem held on the inode (@pages[0]->mapping->host).  There are
+ * with i_mutex held on the inode (@pages[0]->mapping->host).  There are
  * @nr_pages pages in @pages which are locked but not kmap()ped.  The source
  * data has not yet been copied into the @pages.
  * 
@@ -1637,7 +1637,7 @@ err_out:
  * @pos:        byte position in file at which the write begins
  * @bytes:      number of bytes to be written
  *
- * This is called from ntfs_file_buffered_write() with i_sem held on the inode
+ * This is called from ntfs_file_buffered_write() with i_mutex held on the inode
  * (@pages[0]->mapping->host).  There are @nr_pages pages in @pages which are
  * locked but not kmap()ped.  The source data has already been copied into the
  * @page.  ntfs_prepare_pages_for_non_resident_write() has been called before
@@ -1814,7 +1814,7 @@ err_out:
 /**
  * ntfs_file_buffered_write -
  *
- * Locking: The vfs is holding ->i_sem on the inode.
+ * Locking: The vfs is holding ->i_mutex on the inode.
  */
 static ssize_t ntfs_file_buffered_write(struct kiocb *iocb,
                 const struct iovec *iov, unsigned long nr_segs,
@@ -2196,9 +2196,9 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const char __user *buf,
 
         BUG_ON(iocb->ki_pos != pos);
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         ret = ntfs_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
                 int err = sync_page_range(inode, mapping, pos, ret);
                 if (err < 0)
@@ -2221,12 +2221,12 @@ static ssize_t ntfs_file_writev(struct file *file, const struct iovec *iov,
         struct kiocb kiocb;
         ssize_t ret;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         init_sync_kiocb(&kiocb, file);
         ret = ntfs_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos);
         if (ret == -EIOCBQUEUED)
                 ret = wait_on_sync_kiocb(&kiocb);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
                 int err = sync_page_range(inode, mapping, *ppos - ret, ret);
                 if (err < 0)
@@ -2269,7 +2269,7 @@ static ssize_t ntfs_file_write(struct file *file, const char __user *buf,
  * Note: In the past @filp could be NULL so we ignore it as we don't need it
  * anyway.
  *
- * Locking: Caller must hold i_sem on the inode.
+ * Locking: Caller must hold i_mutex on the inode.
  *
  * TODO: We should probably also write all attribute/index inodes associated
  * with this inode but since we have no simple way of getting to them we ignore
diff --git a/fs/ntfs/index.c b/fs/ntfs/index.c
index 8f2d5727546f..9f5427c2d105 100644
--- a/fs/ntfs/index.c
+++ b/fs/ntfs/index.c
@@ -32,7 +32,7 @@
  * Allocate a new index context, initialize it with @idx_ni and return it.
  * Return NULL if allocation failed.
  *
- * Locking:  Caller must hold i_sem on the index inode.
+ * Locking:  Caller must hold i_mutex on the index inode.
  */
 ntfs_index_context *ntfs_index_ctx_get(ntfs_inode *idx_ni)
 {
@@ -50,7 +50,7 @@ ntfs_index_context *ntfs_index_ctx_get(ntfs_inode *idx_ni)
  *
  * Release the index context @ictx, releasing all associated resources.
  *
- * Locking:  Caller must hold i_sem on the index inode.
+ * Locking:  Caller must hold i_mutex on the index inode.
  */
 void ntfs_index_ctx_put(ntfs_index_context *ictx)
 {
@@ -106,7 +106,7 @@ void ntfs_index_ctx_put(ntfs_index_context *ictx)
  * or ntfs_index_entry_write() before the call to ntfs_index_ctx_put() to
  * ensure that the changes are written to disk.
  *
- * Locking:  - Caller must hold i_sem on the index inode.
+ * Locking:  - Caller must hold i_mutex on the index inode.
  *           - Each page cache page in the index allocation mapping must be
  *             locked whilst being accessed otherwise we may find a corrupt
  *             page due to it being under ->writepage at the moment which
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index b24f4c4b2c5c..bda7a08911a5 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2125,13 +2125,13 @@ void ntfs_put_inode(struct inode *vi)
                 ntfs_inode *ni = NTFS_I(vi);
                 if (NInoIndexAllocPresent(ni)) {
                         struct inode *bvi = NULL;
-                        down(&vi->i_sem);
+                        mutex_lock(&vi->i_mutex);
                         if (atomic_read(&vi->i_count) == 2) {
                                 bvi = ni->itype.index.bmp_ino;
                                 if (bvi)
                                         ni->itype.index.bmp_ino = NULL;
                         }
-                        up(&vi->i_sem);
+                        mutex_unlock(&vi->i_mutex);
                         if (bvi)
                                 iput(bvi);
                 }
@@ -2311,7 +2311,7 @@ static const char *es = "  Leaving inconsistent metadata.  Unmount and run "
  *
  * Returns 0 on success or -errno on error.
  *
- * Called with ->i_sem held.  In all but one case ->i_alloc_sem is held for
+ * Called with ->i_mutex held.  In all but one case ->i_alloc_sem is held for
  * writing.  The only case in the kernel where ->i_alloc_sem is not held is
  * mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called
  * with the current i_size as the offset.  The analogous place in NTFS is in
@@ -2831,7 +2831,7 @@ void ntfs_truncate_vfs(struct inode *vi) {
  * We also abort all changes of user, group, and mode as we do not implement
  * the NTFS ACLs yet.
  *
- * Called with ->i_sem held.  For the ATTR_SIZE (i.e. ->truncate) case, also
+ * Called with ->i_mutex held.  For the ATTR_SIZE (i.e. ->truncate) case, also
  * called with ->i_alloc_sem held for writing.
  *
  * Basically this is a copy of generic notify_change() and inode_setattr()
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index 351dbc3b6e40..5ea9eb93af62 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -96,7 +96,7 @@
  *    name. We then convert the name to the current NLS code page, and proceed
  *    searching for a dentry with this name, etc, as in case 2), above.
  *
- * Locking: Caller must hold i_sem on the directory.
+ * Locking: Caller must hold i_mutex on the directory.
  */
 static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent,
                 struct nameidata *nd)
@@ -254,7 +254,7 @@ handle_name:
         nls_name.hash = full_name_hash(nls_name.name, nls_name.len);
 
         /*
-         * Note: No need for dent->d_lock lock as i_sem is held on the
+         * Note: No need for dent->d_lock lock as i_mutex is held on the
          * parent inode.
          */
 
@@ -374,7 +374,7 @@ struct inode_operations ntfs_dir_inode_ops = {
  * The code is based on the ext3 ->get_parent() implementation found in
  * fs/ext3/namei.c::ext3_get_parent().
  *
- * Note: ntfs_get_parent() is called with @child_dent->d_inode->i_sem down.
+ * Note: ntfs_get_parent() is called with @child_dent->d_inode->i_mutex down.
  *
  * Return the dentry of the parent directory on success or the error code on
  * error (IS_ERR() is true).
diff --git a/fs/ntfs/quota.c b/fs/ntfs/quota.c
index 833df2a4e9fb..d0ef4182147b 100644
--- a/fs/ntfs/quota.c
+++ b/fs/ntfs/quota.c
@@ -48,7 +48,7 @@ BOOL ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
                 ntfs_error(vol->sb, "Quota inodes are not open.");
                 return FALSE;
         }
-        down(&vol->quota_q_ino->i_sem);
+        mutex_lock(&vol->quota_q_ino->i_mutex);
         ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino));
         if (!ictx) {
                 ntfs_error(vol->sb, "Failed to get index context.");
@@ -98,7 +98,7 @@ BOOL ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
         ntfs_index_entry_mark_dirty(ictx);
 set_done:
         ntfs_index_ctx_put(ictx);
-        up(&vol->quota_q_ino->i_sem);
+        mutex_unlock(&vol->quota_q_ino->i_mutex);
         /*
          * We set the flag so we do not try to mark the quotas out of date
          * again on remount.
@@ -110,7 +110,7 @@ done:
 err_out:
         if (ictx)
                 ntfs_index_ctx_put(ictx);
-        up(&vol->quota_q_ino->i_sem);
+        mutex_unlock(&vol->quota_q_ino->i_mutex);
         return FALSE;
 }
 
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 6c16db9e1a8a..280e383fc84e 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -1213,10 +1213,10 @@ static int check_windows_hibernation_status(ntfs_volume *vol)
          * Find the inode number for the hibernation file by looking up the
          * filename hiberfil.sys in the root directory.
          */
-        down(&vol->root_ino->i_sem);
+        mutex_lock(&vol->root_ino->i_mutex);
         mref = ntfs_lookup_inode_by_name(NTFS_I(vol->root_ino), hiberfil, 12,
                         &name);
-        up(&vol->root_ino->i_sem);
+        mutex_unlock(&vol->root_ino->i_mutex);
         if (IS_ERR_MREF(mref)) {
                 ret = MREF_ERR(mref);
                 /* If the file does not exist, Windows is not hibernated. */
@@ -1307,10 +1307,10 @@ static BOOL load_and_init_quota(ntfs_volume *vol)
          * Find the inode number for the quota file by looking up the filename
          * $Quota in the extended system files directory $Extend.
          */
-        down(&vol->extend_ino->i_sem);
+        mutex_lock(&vol->extend_ino->i_mutex);
         mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), Quota, 6,
                         &name);
-        up(&vol->extend_ino->i_sem);
+        mutex_unlock(&vol->extend_ino->i_mutex);
         if (IS_ERR_MREF(mref)) {
                 /*
                  * If the file does not exist, quotas are disabled and have
@@ -1390,10 +1390,10 @@ static BOOL load_and_init_usnjrnl(ntfs_volume *vol)
          * Find the inode number for the transaction log file by looking up the
          * filename $UsnJrnl in the extended system files directory $Extend.
          */
-        down(&vol->extend_ino->i_sem);
+        mutex_lock(&vol->extend_ino->i_mutex);
         mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), UsnJrnl, 8,
                         &name);
-        up(&vol->extend_ino->i_sem);
+        mutex_unlock(&vol->extend_ino->i_mutex);
         if (IS_ERR_MREF(mref)) {
                 /*
                  * If the file does not exist, transaction logging is disabled,
@@ -2312,9 +2312,9 @@ static void ntfs_put_super(struct super_block *sb)
         if (!list_empty(&sb->s_dirty)) {
                 const char *s1, *s2;
 
-                down(&vol->mft_ino->i_sem);
+                mutex_lock(&vol->mft_ino->i_mutex);
                 truncate_inode_pages(vol->mft_ino->i_mapping, 0);
-                up(&vol->mft_ino->i_sem);
+                mutex_unlock(&vol->mft_ino->i_mutex);
                 write_inode_now(vol->mft_ino, 1);
                 if (!list_empty(&sb->s_dirty)) {
                         static const char *_s1 = "inodes";
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 465f797451ee..6b9812db3779 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -966,7 +966,7 @@ static int ocfs2_truncate_log_append(struct ocfs2_super *osb,
         mlog_entry("start_blk = %"MLFu64", num_clusters = %u\n", start_blk,
                    num_clusters);
 
-        BUG_ON(!down_trylock(&tl_inode->i_sem));
+        BUG_ON(mutex_trylock(&tl_inode->i_mutex));
 
         start_cluster = ocfs2_blocks_to_clusters(osb->sb, start_blk);
 
@@ -1108,7 +1108,7 @@ bail:
         return status;
 }
 
-/* Expects you to already be holding tl_inode->i_sem */
+/* Expects you to already be holding tl_inode->i_mutex */
 static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
 {
         int status;
@@ -1123,7 +1123,7 @@ static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
 
         mlog_entry_void();
 
-        BUG_ON(!down_trylock(&tl_inode->i_sem));
+        BUG_ON(mutex_trylock(&tl_inode->i_mutex));
 
         di = (struct ocfs2_dinode *) tl_bh->b_data;
         tl = &di->id2.i_dealloc;
@@ -1198,9 +1198,9 @@ int ocfs2_flush_truncate_log(struct ocfs2_super *osb)
         int status;
         struct inode *tl_inode = osb->osb_tl_inode;
 
-        down(&tl_inode->i_sem);
+        mutex_lock(&tl_inode->i_mutex);
         status = __ocfs2_flush_truncate_log(osb);
-        up(&tl_inode->i_sem);
+        mutex_unlock(&tl_inode->i_mutex);
 
         return status;
 }
@@ -1363,7 +1363,7 @@ int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
         mlog(0, "cleanup %u records from %"MLFu64"\n", num_recs,
              tl_copy->i_blkno);
 
-        down(&tl_inode->i_sem);
+        mutex_lock(&tl_inode->i_mutex);
         for(i = 0; i < num_recs; i++) {
                 if (ocfs2_truncate_log_needs_flush(osb)) {
                         status = __ocfs2_flush_truncate_log(osb);
@@ -1395,7 +1395,7 @@ int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
         }
 
 bail_up:
-        up(&tl_inode->i_sem);
+        mutex_unlock(&tl_inode->i_mutex);
 
         mlog_exit(status);
         return status;
@@ -1840,7 +1840,7 @@ start:
 
         mlog(0, "clusters_to_del = %u in this pass\n", clusters_to_del);
 
-        down(&tl_inode->i_sem);
+        mutex_lock(&tl_inode->i_mutex);
         tl_sem = 1;
         /* ocfs2_truncate_log_needs_flush guarantees us at least one
          * record is free for use. If there isn't any, we flush to get
@@ -1875,7 +1875,7 @@ start:
                 goto bail;
         }
 
-        up(&tl_inode->i_sem);
+        mutex_unlock(&tl_inode->i_mutex);
         tl_sem = 0;
 
         ocfs2_commit_trans(handle);
@@ -1890,7 +1890,7 @@ bail:
         ocfs2_schedule_truncate_log_flush(osb, 1);
 
         if (tl_sem)
-                up(&tl_inode->i_sem);
+                mutex_unlock(&tl_inode->i_mutex);
 
         if (handle)
                 ocfs2_commit_trans(handle);
@@ -1994,7 +1994,7 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb,
                         goto bail;
                 }
 
-                down(&ext_alloc_inode->i_sem);
+                mutex_lock(&ext_alloc_inode->i_mutex);
                 (*tc)->tc_ext_alloc_inode = ext_alloc_inode;
 
                 status = ocfs2_meta_lock(ext_alloc_inode,
@@ -2026,7 +2026,7 @@ static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc)
                 if (tc->tc_ext_alloc_locked)
                         ocfs2_meta_unlock(tc->tc_ext_alloc_inode, 1);
 
-                up(&tc->tc_ext_alloc_inode->i_sem);
+                mutex_unlock(&tc->tc_ext_alloc_inode->i_mutex);
                 iput(tc->tc_ext_alloc_inode);
         }
 
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index 5fd60c105913..cf7828f23361 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -653,7 +653,7 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
         struct config_group *o2hb_group = NULL, *ret = NULL;
         void *defs = NULL;
 
-        /* this runs under the parent dir's i_sem; there can be only
+        /* this runs under the parent dir's i_mutex; there can be only
          * one caller in here at a time */
         if (o2nm_single_cluster)
                 goto out; /* ENOSPC */
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 856e20ae8263..57158fa75d91 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -202,7 +202,7 @@ bail:
 }
 
 /*
- * NOTE: this should always be called with parent dir i_sem taken.
+ * NOTE: this should always be called with parent dir i_mutex taken.
  */
 int ocfs2_find_files_on_disk(const char *name,
                              int namelen,
@@ -245,7 +245,7 @@ leave:
  * Return 0 if the name does not exist
  * Return -EEXIST if the directory contains the name
  *
- * Callers should have i_sem + a cluster lock on dir
+ * Callers should have i_mutex + a cluster lock on dir
  */
 int ocfs2_check_dir_for_entry(struct inode *dir,
                               const char *name,
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 72ae9e3306f4..ca5f9f90d794 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -492,7 +492,7 @@ restart_all:
         }
 
         /* blocks peope in read/write from reading our allocation
-         * until we're done changing it. We depend on i_sem to block
+         * until we're done changing it. We depend on i_mutex to block
          * other extend/truncate calls while we're here. Ordering wrt
          * start_trans is important here -- always do it before! */
         down_write(&OCFS2_I(inode)->ip_alloc_sem);
@@ -958,8 +958,8 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
                 filp->f_flags &= ~O_DIRECT;
 #endif
 
-        down(&inode->i_sem);
-        /* to match setattr's i_sem -> i_alloc_sem -> rw_lock ordering */
+        mutex_lock(&inode->i_mutex);
+        /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
         if (filp->f_flags & O_DIRECT) {
                 have_alloc_sem = 1;
                 down_read(&inode->i_alloc_sem);
@@ -1123,7 +1123,7 @@ out:
                 up_read(&inode->i_alloc_sem);
         if (rw_level != -1) 
                 ocfs2_rw_unlock(inode, rw_level);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 
         mlog_exit(ret);
         return ret;
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index a91ba4dec936..d4ecc0627716 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -485,10 +485,10 @@ static int ocfs2_remove_inode(struct inode *inode,
                 goto bail;
         }
 
-        down(&inode_alloc_inode->i_sem);
+        mutex_lock(&inode_alloc_inode->i_mutex);
         status = ocfs2_meta_lock(inode_alloc_inode, NULL, &inode_alloc_bh, 1);
         if (status < 0) {
-                up(&inode_alloc_inode->i_sem);
+                mutex_unlock(&inode_alloc_inode->i_mutex);
 
                 mlog_errno(status);
                 goto bail;
@@ -536,7 +536,7 @@ bail_commit:
         ocfs2_commit_trans(handle);
 bail_unlock:
         ocfs2_meta_unlock(inode_alloc_inode, 1);
-        up(&inode_alloc_inode->i_sem);
+        mutex_unlock(&inode_alloc_inode->i_mutex);
         brelse(inode_alloc_bh);
 bail:
         iput(inode_alloc_inode);
@@ -567,10 +567,10 @@ static int ocfs2_wipe_inode(struct inode *inode,
         /* Lock the orphan dir. The lock will be held for the entire
          * delete_inode operation. We do this now to avoid races with
          * recovery completion on other nodes. */
-        down(&orphan_dir_inode->i_sem);
+        mutex_lock(&orphan_dir_inode->i_mutex);
         status = ocfs2_meta_lock(orphan_dir_inode, NULL, &orphan_dir_bh, 1);
         if (status < 0) {
-                up(&orphan_dir_inode->i_sem);
+                mutex_unlock(&orphan_dir_inode->i_mutex);
 
                 mlog_errno(status);
                 goto bail;
@@ -593,7 +593,7 @@ static int ocfs2_wipe_inode(struct inode *inode,
 
 bail_unlock_dir:
         ocfs2_meta_unlock(orphan_dir_inode, 1);
-        up(&orphan_dir_inode->i_sem);
+        mutex_unlock(&orphan_dir_inode->i_mutex);
         brelse(orphan_dir_bh);
 bail:
         iput(orphan_dir_inode);
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 04428042e5e5..303c8d96457f 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -216,7 +216,7 @@ void ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle,
         atomic_inc(&inode->i_count);
 
         /* we're obviously changing it... */
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
 
         /* sanity check */
         BUG_ON(OCFS2_I(inode)->ip_handle);
@@ -241,7 +241,7 @@ static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle *handle)
                 OCFS2_I(inode)->ip_handle = NULL;
                 list_del_init(&OCFS2_I(inode)->ip_handle_list);
 
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
                 iput(inode);
         }
 }
@@ -1433,10 +1433,10 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
                 goto out;
         }
 
-        down(&orphan_dir_inode->i_sem);
+        mutex_lock(&orphan_dir_inode->i_mutex);
         status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0);
         if (status < 0) {
-                up(&orphan_dir_inode->i_sem);
+                mutex_unlock(&orphan_dir_inode->i_mutex);
                 mlog_errno(status);
                 goto out;
         }
@@ -1451,7 +1451,7 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
                 if (!bh)
                         status = -EINVAL;
                 if (status < 0) {
-                        up(&orphan_dir_inode->i_sem);
+                        mutex_unlock(&orphan_dir_inode->i_mutex);
                         if (bh)
                                 brelse(bh);
                         mlog_errno(status);
@@ -1465,7 +1465,7 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
 
                         if (!ocfs2_check_dir_entry(orphan_dir_inode,
                                                   de, bh, local)) {
-                                up(&orphan_dir_inode->i_sem);
+                                mutex_unlock(&orphan_dir_inode->i_mutex);
                                 status = -EINVAL;
                                 mlog_errno(status);
                                 brelse(bh);
@@ -1509,7 +1509,7 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
                 }
                 brelse(bh);
         }
-        up(&orphan_dir_inode->i_sem);
+        mutex_unlock(&orphan_dir_inode->i_mutex);
 
         ocfs2_meta_unlock(orphan_dir_inode, 0);
         have_disk_lock = 0;
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index fe373a2101d9..149b35181666 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -334,7 +334,7 @@ int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb,
                 goto bail;
         }
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
 
         status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno,
                                   &alloc_bh, 0, inode);
@@ -367,7 +367,7 @@ bail:
                 brelse(alloc_bh);
 
         if (inode) {
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
                 iput(inode);
         }
 
@@ -446,7 +446,7 @@ bail:
 
 /*
  * make sure we've got at least bitswanted contiguous bits in the
- * local alloc. You lose them when you drop i_sem.
+ * local alloc. You lose them when you drop i_mutex.
  *
  * We will add ourselves to the transaction passed in, but may start
  * our own in order to shift windows.
diff --git a/fs/open.c b/fs/open.c
index 75f3329e8a67..a3b3a9b5c2ff 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -211,9 +211,9 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
                 newattrs.ia_valid |= ATTR_FILE;
         }
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         err = notify_change(dentry, &newattrs);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
         return err;
 }
 
@@ -398,9 +398,9 @@ asmlinkage long sys_utime(char __user * filename, struct utimbuf __user * times)
                     (error = vfs_permission(&nd, MAY_WRITE)) != 0)
                         goto dput_and_out;
         }
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         error = notify_change(nd.dentry, &newattrs);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 dput_and_out:
         path_release(&nd);
 out:
@@ -451,9 +451,9 @@ long do_utimes(char __user * filename, struct timeval * times)
                     (error = vfs_permission(&nd, MAY_WRITE)) != 0)
                         goto dput_and_out;
         }
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         error = notify_change(nd.dentry, &newattrs);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 dput_and_out:
         path_release(&nd);
 out:
@@ -620,13 +620,13 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
         err = -EPERM;
         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
                 goto out_putf;
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         if (mode == (mode_t) -1)
                 mode = inode->i_mode;
         newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
         newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
         err = notify_change(dentry, &newattrs);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 
 out_putf:
         fput(file);
@@ -654,13 +654,13 @@ asmlinkage long sys_chmod(const char __user * filename, mode_t mode)
         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
                 goto dput_and_out;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         if (mode == (mode_t) -1)
                 mode = inode->i_mode;
         newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
         newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
         error = notify_change(nd.dentry, &newattrs);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 
 dput_and_out:
         path_release(&nd);
@@ -696,9 +696,9 @@ static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
         }
         if (!S_ISDIR(inode->i_mode))
                 newattrs.ia_valid |= ATTR_KILL_SUID|ATTR_KILL_SGID;
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         error = notify_change(dentry, &newattrs);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 out:
         return error;
 }
diff --git a/fs/pipe.c b/fs/pipe.c
index 66aa0b938d6a..acb030b61fb0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -44,10 +44,10 @@ void pipe_wait(struct inode * inode)
          * is considered a noninteractive wait:
          */
         prepare_to_wait(PIPE_WAIT(*inode), &wait, TASK_INTERRUPTIBLE|TASK_NONINTERACTIVE);
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
         schedule();
         finish_wait(PIPE_WAIT(*inode), &wait);
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
 }
 
 static inline int
@@ -136,7 +136,7 @@ pipe_readv(struct file *filp, const struct iovec *_iov,
 
         do_wakeup = 0;
         ret = 0;
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         info = inode->i_pipe;
         for (;;) {
                 int bufs = info->nrbufs;
@@ -200,7 +200,7 @@ pipe_readv(struct file *filp, const struct iovec *_iov,
                 }
                 pipe_wait(inode);
         }
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
         /* Signal writers asynchronously that there is more room.  */
         if (do_wakeup) {
                 wake_up_interruptible(PIPE_WAIT(*inode));
@@ -237,7 +237,7 @@ pipe_writev(struct file *filp, const struct iovec *_iov,
 
         do_wakeup = 0;
         ret = 0;
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         info = inode->i_pipe;
 
         if (!PIPE_READERS(*inode)) {
@@ -341,7 +341,7 @@ pipe_writev(struct file *filp, const struct iovec *_iov,
                 PIPE_WAITING_WRITERS(*inode)--;
         }
 out:
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
         if (do_wakeup) {
                 wake_up_interruptible(PIPE_WAIT(*inode));
                 kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
@@ -381,7 +381,7 @@ pipe_ioctl(struct inode *pino, struct file *filp,
 
         switch (cmd) {
                 case FIONREAD:
-                        down(PIPE_SEM(*inode));
+                        mutex_lock(PIPE_MUTEX(*inode));
                         info =  inode->i_pipe;
                         count = 0;
                         buf = info->curbuf;
@@ -390,7 +390,7 @@ pipe_ioctl(struct inode *pino, struct file *filp,
                                 count += info->bufs[buf].len;
                                 buf = (buf+1) & (PIPE_BUFFERS-1);
                         }
-                        up(PIPE_SEM(*inode));
+                        mutex_unlock(PIPE_MUTEX(*inode));
                         return put_user(count, (int __user *)arg);
                 default:
                         return -EINVAL;
@@ -433,7 +433,7 @@ pipe_poll(struct file *filp, poll_table *wait)
 static int
 pipe_release(struct inode *inode, int decr, int decw)
 {
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         PIPE_READERS(*inode) -= decr;
         PIPE_WRITERS(*inode) -= decw;
         if (!PIPE_READERS(*inode) && !PIPE_WRITERS(*inode)) {
@@ -443,7 +443,7 @@ pipe_release(struct inode *inode, int decr, int decw)
                 kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
                 kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT);
         }
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         return 0;
 }
@@ -454,9 +454,9 @@ pipe_read_fasync(int fd, struct file *filp, int on)
         struct inode *inode = filp->f_dentry->d_inode;
         int retval;
 
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         retval = fasync_helper(fd, filp, on, PIPE_FASYNC_READERS(*inode));
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         if (retval < 0)
                 return retval;
@@ -471,9 +471,9 @@ pipe_write_fasync(int fd, struct file *filp, int on)
         struct inode *inode = filp->f_dentry->d_inode;
         int retval;
 
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         retval = fasync_helper(fd, filp, on, PIPE_FASYNC_WRITERS(*inode));
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         if (retval < 0)
                 return retval;
@@ -488,14 +488,14 @@ pipe_rdwr_fasync(int fd, struct file *filp, int on)
         struct inode *inode = filp->f_dentry->d_inode;
         int retval;
 
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
 
         retval = fasync_helper(fd, filp, on, PIPE_FASYNC_READERS(*inode));
 
         if (retval >= 0)
                 retval = fasync_helper(fd, filp, on, PIPE_FASYNC_WRITERS(*inode));
 
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         if (retval < 0)
                 return retval;
@@ -534,9 +534,9 @@ pipe_read_open(struct inode *inode, struct file *filp)
 {
         /* We could have perhaps used atomic_t, but this and friends
            below are the only places.  So it doesn't seem worthwhile.  */
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         PIPE_READERS(*inode)++;
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         return 0;
 }
@@ -544,9 +544,9 @@ pipe_read_open(struct inode *inode, struct file *filp)
 static int
 pipe_write_open(struct inode *inode, struct file *filp)
 {
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         PIPE_WRITERS(*inode)++;
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         return 0;
 }
@@ -554,12 +554,12 @@ pipe_write_open(struct inode *inode, struct file *filp)
 static int
 pipe_rdwr_open(struct inode *inode, struct file *filp)
 {
-        down(PIPE_SEM(*inode));
+        mutex_lock(PIPE_MUTEX(*inode));
         if (filp->f_mode & FMODE_READ)
                 PIPE_READERS(*inode)++;
         if (filp->f_mode & FMODE_WRITE)
                 PIPE_WRITERS(*inode)++;
-        up(PIPE_SEM(*inode));
+        mutex_unlock(PIPE_MUTEX(*inode));
 
         return 0;
 }
diff --git a/fs/quota.c b/fs/quota.c
index 612e04db4b93..d14d872646d4 100644
--- a/fs/quota.c
+++ b/fs/quota.c
@@ -168,7 +168,7 @@ static void quota_sync_sb(struct super_block *sb, int type)
         sync_blockdev(sb->s_bdev);
 
         /* Now when everything is written we can discard the pagecache so
-         * that userspace sees the changes. We need i_sem and so we could
+         * that userspace sees the changes. We need i_mutex and so we could
          * not do it inside dqonoff_sem. Moreover we need to be carefull
          * about races with quotaoff() (that is the reason why we have own
          * reference to inode). */
@@ -184,9 +184,9 @@ static void quota_sync_sb(struct super_block *sb, int type)
         up(&sb_dqopt(sb)->dqonoff_sem);
         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
                 if (discard[cnt]) {
-                        down(&discard[cnt]->i_sem);
+                        mutex_lock(&discard[cnt]->i_mutex);
                         truncate_inode_pages(&discard[cnt]->i_data, 0);
-                        up(&discard[cnt]->i_sem);
+                        mutex_unlock(&discard[cnt]->i_mutex);
                         iput(discard[cnt]);
                 }
         }
diff --git a/fs/read_write.c b/fs/read_write.c
index df3468a22fea..3f7a1a62165f 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -33,7 +33,7 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
         long long retval;
         struct inode *inode = file->f_mapping->host;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         switch (origin) {
                 case 2:
                         offset += inode->i_size;
@@ -49,7 +49,7 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
                 }
                 retval = offset;
         }
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return retval;
 }
 
diff --git a/fs/readdir.c b/fs/readdir.c
index b03579bc0210..b6109329b607 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -30,13 +30,13 @@ int vfs_readdir(struct file *file, filldir_t filler, void *buf)
         if (res)
                 goto out;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         res = -ENOENT;
         if (!IS_DEADDIR(inode)) {
                 res = file->f_op->readdir(file, buf, filler);
                 file_accessed(file);
         }
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
 out:
         return res;
 }
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 7892a865b58a..127e7d2cabdd 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -49,7 +49,7 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
         }
 
         reiserfs_write_lock(inode->i_sb);
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         /* freeing preallocation only involves relogging blocks that
          * are already in the current transaction.  preallocation gets
          * freed at the end of each transaction, so it is impossible for
@@ -100,7 +100,7 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
                 err = reiserfs_truncate_file(inode, 0);
         }
       out:
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         reiserfs_write_unlock(inode->i_sb);
         return err;
 }
@@ -1342,7 +1342,7 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
         if (unlikely(!access_ok(VERIFY_READ, buf, count)))
                 return -EFAULT;
 
-        down(&inode->i_sem);    // locks the entire file for just us
+        mutex_lock(&inode->i_mutex);    // locks the entire file for just us
 
         pos = *ppos;
 
@@ -1532,12 +1532,12 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
                     generic_osync_inode(inode, file->f_mapping,
                                         OSYNC_METADATA | OSYNC_DATA);
 
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         reiserfs_async_progress_wait(inode->i_sb);
         return (already_written != 0) ? already_written : res;
 
       out:
-        up(&inode->i_sem);      // unlock the file on exit.
+        mutex_unlock(&inode->i_mutex);  // unlock the file on exit.
         return res;
 }
 
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index a5e3a0ddbe53..ffa34b861bdb 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -40,12 +40,12 @@ void reiserfs_delete_inode(struct inode *inode)
 
         /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
         if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {  /* also handles bad_inode case */
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
 
                 reiserfs_delete_xattrs(inode);
 
                 if (journal_begin(&th, inode->i_sb, jbegin_count)) {
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
                         goto out;
                 }
                 reiserfs_update_inode_transaction(inode);
@@ -59,11 +59,11 @@ void reiserfs_delete_inode(struct inode *inode)
                         DQUOT_FREE_INODE(inode);
 
                 if (journal_end(&th, inode->i_sb, jbegin_count)) {
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
                         goto out;
                 }
 
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
 
                 /* check return value from reiserfs_delete_object after
                  * ending the transaction
@@ -551,7 +551,7 @@ static int convert_tail_for_hole(struct inode *inode,
 
         /* we don't have to make sure the conversion did not happen while
          ** we were locking the page because anyone that could convert
-         ** must first take i_sem.
+         ** must first take i_mutex.
          **
          ** We must fix the tail page for writing because it might have buffers
          ** that are mapped, but have a block number of 0.  This indicates tail
@@ -586,7 +586,7 @@ static inline int _allocate_block(struct reiserfs_transaction_handle *th,
         BUG_ON(!th->t_trans_id);
 
 #ifdef REISERFS_PREALLOCATE
-        if (!(flags & GET_BLOCK_NO_ISEM)) {
+        if (!(flags & GET_BLOCK_NO_IMUX)) {
                 return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
                                                   path, block);
         }
@@ -2318,7 +2318,7 @@ static int map_block_for_writepage(struct inode *inode,
         /* this is where we fill in holes in the file. */
         if (use_get_block) {
                 retval = reiserfs_get_block(inode, block, bh_result,
-                                            GET_BLOCK_CREATE | GET_BLOCK_NO_ISEM
+                                            GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
                                             | GET_BLOCK_NO_DANGLE);
                 if (!retval) {
                         if (!buffer_mapped(bh_result)
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 81fc00285f60..ba8bf8df6dc7 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -120,7 +120,7 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
         /* we need to make sure nobody is changing the file size beneath
          ** us
          */
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
 
         write_from = inode->i_size & (blocksize - 1);
         /* if we are on a block boundary, we are already unpacked.  */
@@ -156,7 +156,7 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
         page_cache_release(page);
 
       out:
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         reiserfs_write_unlock(inode->i_sb);
         return retval;
 }
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 42afb5bef111..397d9590c8f2 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -2211,7 +2211,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
         size_t towrite = len;
         struct buffer_head tmp_bh, *bh;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         while (towrite > 0) {
                 tocopy = sb->s_blocksize - offset < towrite ?
                     sb->s_blocksize - offset : towrite;
@@ -2250,7 +2250,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
         inode->i_version++;
         inode->i_mtime = inode->i_ctime = CURRENT_TIME;
         mark_inode_dirty(inode);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return len - towrite;
 }
 
diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c
index c92e124f628e..196e971c03c9 100644
--- a/fs/reiserfs/tail_conversion.c
+++ b/fs/reiserfs/tail_conversion.c
@@ -205,7 +205,7 @@ int indirect2direct(struct reiserfs_transaction_handle *th, struct inode *p_s_in
                                          1) * p_s_sb->s_blocksize;
         pos1 = pos;
 
-        // we are protected by i_sem. The tail can not disapper, not
+        // we are protected by i_mutex. The tail can not disapper, not
         // append can be done either
         // we are in truncate or packing tail in file_release
 
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 02091eaac0b4..f1895f0a278e 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -67,11 +67,11 @@ static struct dentry *create_xa_root(struct super_block *sb)
                 goto out;
         } else if (!xaroot->d_inode) {
                 int err;
-                down(&privroot->d_inode->i_sem);
+                mutex_lock(&privroot->d_inode->i_mutex);
                 err =
                     privroot->d_inode->i_op->mkdir(privroot->d_inode, xaroot,
                                                    0700);
-                up(&privroot->d_inode->i_sem);
+                mutex_unlock(&privroot->d_inode->i_mutex);
 
                 if (err) {
                         dput(xaroot);
@@ -219,7 +219,7 @@ static struct dentry *get_xa_file_dentry(const struct inode *inode,
         } else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
                 goto out;
         } else {
-                /* inode->i_sem is down, so nothing else can try to create
+                /* inode->i_mutex is down, so nothing else can try to create
                  * the same xattr */
                 err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
                                                    0700 | S_IFREG, NULL);
@@ -268,7 +268,7 @@ static struct file *open_xa_file(const struct inode *inode, const char *name,
  * and don't mess with f->f_pos, but the idea is the same.  Do some
  * action on each and every entry in the directory.
  *
- * we're called with i_sem held, so there are no worries about the directory
+ * we're called with i_mutex held, so there are no worries about the directory
  * changing underneath us.
  */
 static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
@@ -426,7 +426,7 @@ int xattr_readdir(struct file *file, filldir_t filler, void *buf)
         int res = -ENOTDIR;
         if (!file->f_op || !file->f_op->readdir)
                 goto out;
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
 //        down(&inode->i_zombie);
         res = -ENOENT;
         if (!IS_DEADDIR(inode)) {
@@ -435,7 +435,7 @@ int xattr_readdir(struct file *file, filldir_t filler, void *buf)
                 unlock_kernel();
         }
 //        up(&inode->i_zombie);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
       out:
         return res;
 }
@@ -480,7 +480,7 @@ static inline __u32 xattr_hash(const char *msg, int len)
 /* Generic extended attribute operations that can be used by xa plugins */
 
 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 int
 reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
@@ -535,7 +535,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
         /* Resize it so we're ok to write there */
         newattrs.ia_size = buffer_size;
         newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
-        down(&xinode->i_sem);
+        mutex_lock(&xinode->i_mutex);
         err = notify_change(fp->f_dentry, &newattrs);
         if (err)
                 goto out_filp;
@@ -598,7 +598,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
         }
 
       out_filp:
-        up(&xinode->i_sem);
+        mutex_unlock(&xinode->i_mutex);
         fput(fp);
 
       out:
@@ -606,7 +606,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
 }
 
 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 int
 reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
@@ -793,7 +793,7 @@ reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,
 
 }
 
-/* This is called w/ inode->i_sem downed */
+/* This is called w/ inode->i_mutex downed */
 int reiserfs_delete_xattrs(struct inode *inode)
 {
         struct file *fp;
@@ -946,7 +946,7 @@ int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
 
 /*
  * Inode operation getxattr()
- * Preliminary locking: we down dentry->d_inode->i_sem
+ * Preliminary locking: we down dentry->d_inode->i_mutex
  */
 ssize_t
 reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
@@ -970,7 +970,7 @@ reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
 /*
  * Inode operation setxattr()
  *
- * dentry->d_inode->i_sem down
+ * dentry->d_inode->i_mutex down
  */
 int
 reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
@@ -1008,7 +1008,7 @@ reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 /*
  * Inode operation removexattr()
  *
- * dentry->d_inode->i_sem down
+ * dentry->d_inode->i_mutex down
  */
 int reiserfs_removexattr(struct dentry *dentry, const char *name)
 {
@@ -1091,7 +1091,7 @@ reiserfs_listxattr_filler(void *buf, const char *name, int namelen,
 /*
  * Inode operation listxattr()
  *
- * Preliminary locking: we down dentry->d_inode->i_sem
+ * Preliminary locking: we down dentry->d_inode->i_mutex
  */
 ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
 {
@@ -1289,9 +1289,9 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags)
                 if (!IS_ERR(dentry)) {
                         if (!(mount_flags & MS_RDONLY) && !dentry->d_inode) {
                                 struct inode *inode = dentry->d_parent->d_inode;
-                                down(&inode->i_sem);
+                                mutex_lock(&inode->i_mutex);
                                 err = inode->i_op->mkdir(inode, dentry, 0700);
-                                up(&inode->i_sem);
+                                mutex_unlock(&inode->i_mutex);
                                 if (err) {
                                         dput(dentry);
                                         dentry = NULL;
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index a47ac9aac8b2..2dc953504cc0 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -174,7 +174,7 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 /*
  * Inode operation get_posix_acl().
  *
- * inode->i_sem: down
+ * inode->i_mutex: down
  * BKL held [before 2.5.x]
  */
 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
@@ -237,7 +237,7 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
 /*
  * Inode operation set_posix_acl().
  *
- * inode->i_sem: down
+ * inode->i_mutex: down
  * BKL held [before 2.5.x]
  */
 static int
@@ -312,7 +312,7 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
         return error;
 }
 
-/* dir->i_sem: down,
+/* dir->i_mutex: locked,
  * inode is new and not released into the wild yet */
 int
 reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
diff --git a/fs/relayfs/inode.c b/fs/relayfs/inode.c
index 7b7f2cb5f0e1..383523011aad 100644
--- a/fs/relayfs/inode.c
+++ b/fs/relayfs/inode.c
@@ -109,7 +109,7 @@ static struct dentry *relayfs_create_entry(const char *name,
         }
 
         parent = dget(parent);
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
         d = lookup_one_len(name, parent, strlen(name));
         if (IS_ERR(d)) {
                 d = NULL;
@@ -139,7 +139,7 @@ release_mount:
         simple_release_fs(&relayfs_mount, &relayfs_mount_count);
 
 exit:
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
         dput(parent);
         return d;
 }
@@ -204,7 +204,7 @@ int relayfs_remove(struct dentry *dentry)
                 return -EINVAL;
 
         parent = dget(parent);
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
         if (dentry->d_inode) {
                 if (S_ISDIR(dentry->d_inode->i_mode))
                         error = simple_rmdir(parent->d_inode, dentry);
@@ -215,7 +215,7 @@ int relayfs_remove(struct dentry *dentry)
         }
         if (!error)
                 dput(dentry);
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
         dput(parent);
 
         if (!error)
@@ -476,7 +476,7 @@ static ssize_t relay_file_read(struct file *filp,
         ssize_t ret = 0;
         void *from;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         if(!relay_file_read_avail(buf, *ppos))
                 goto out;
 
@@ -494,7 +494,7 @@ static ssize_t relay_file_read(struct file *filp,
         relay_file_read_consume(buf, read_start, count);
         *ppos = relay_file_read_end_pos(buf, read_start, count);
 out:
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index d36780382176..49bd219275db 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -99,7 +99,7 @@ static int create_dir(struct kobject * k, struct dentry * p,
         int error;
         umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
 
-        down(&p->d_inode->i_sem);
+        mutex_lock(&p->d_inode->i_mutex);
         *d = lookup_one_len(n, p, strlen(n));
         if (!IS_ERR(*d)) {
                 error = sysfs_make_dirent(p->d_fsdata, *d, k, mode, SYSFS_DIR);
@@ -122,7 +122,7 @@ static int create_dir(struct kobject * k, struct dentry * p,
                 dput(*d);
         } else
                 error = PTR_ERR(*d);
-        up(&p->d_inode->i_sem);
+        mutex_unlock(&p->d_inode->i_mutex);
         return error;
 }
 
@@ -246,7 +246,7 @@ static void remove_dir(struct dentry * d)
         struct dentry * parent = dget(d->d_parent);
         struct sysfs_dirent * sd;
 
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
         d_delete(d);
         sd = d->d_fsdata;
         list_del_init(&sd->s_sibling);
@@ -257,7 +257,7 @@ static void remove_dir(struct dentry * d)
         pr_debug(" o %s removing done (%d)\n",d->d_name.name,
                  atomic_read(&d->d_count));
 
-        up(&parent->d_inode->i_sem);
+        mutex_unlock(&parent->d_inode->i_mutex);
         dput(parent);
 }
 
@@ -286,7 +286,7 @@ void sysfs_remove_dir(struct kobject * kobj)
                 return;
 
         pr_debug("sysfs %s: removing dir\n",dentry->d_name.name);
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         parent_sd = dentry->d_fsdata;
         list_for_each_entry_safe(sd, tmp, &parent_sd->s_children, s_sibling) {
                 if (!sd->s_element || !(sd->s_type & SYSFS_NOT_PINNED))
@@ -295,7 +295,7 @@ void sysfs_remove_dir(struct kobject * kobj)
                 sysfs_drop_dentry(sd, dentry);
                 sysfs_put(sd);
         }
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         remove_dir(dentry);
         /**
@@ -318,7 +318,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
         down_write(&sysfs_rename_sem);
         parent = kobj->parent->dentry;
 
-        down(&parent->d_inode->i_sem);
+        mutex_lock(&parent->d_inode->i_mutex);
 
         new_dentry = lookup_one_len(new_name, parent, strlen(new_name));
         if (!IS_ERR(new_dentry)) {
@@ -334,7 +334,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
                         error = -EEXIST;
                 dput(new_dentry);
         }
-        up(&parent->d_inode->i_sem);    
+        mutex_unlock(&parent->d_inode->i_mutex);
         up_write(&sysfs_rename_sem);
 
         return error;
@@ -345,9 +345,9 @@ static int sysfs_dir_open(struct inode *inode, struct file *file)
         struct dentry * dentry = file->f_dentry;
         struct sysfs_dirent * parent_sd = dentry->d_fsdata;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         file->private_data = sysfs_new_dirent(parent_sd, NULL);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         return file->private_data ? 0 : -ENOMEM;
 
@@ -358,9 +358,9 @@ static int sysfs_dir_close(struct inode *inode, struct file *file)
         struct dentry * dentry = file->f_dentry;
         struct sysfs_dirent * cursor = file->private_data;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         list_del_init(&cursor->s_sibling);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
 
         release_sysfs_dirent(cursor);
 
@@ -436,7 +436,7 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 {
         struct dentry * dentry = file->f_dentry;
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         switch (origin) {
                 case 1:
                         offset += file->f_pos;
@@ -444,7 +444,7 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
                         if (offset >= 0)
                                 break;
                 default:
-                        up(&file->f_dentry->d_inode->i_sem);
+                        mutex_unlock(&file->f_dentry->d_inode->i_mutex);
                         return -EINVAL;
         }
         if (offset != file->f_pos) {
@@ -468,7 +468,7 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
                         list_add_tail(&cursor->s_sibling, p);
                 }
         }
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
         return offset;
 }
 
@@ -483,4 +483,3 @@ struct file_operations sysfs_dir_operations = {
 EXPORT_SYMBOL_GPL(sysfs_create_dir);
 EXPORT_SYMBOL_GPL(sysfs_remove_dir);
 EXPORT_SYMBOL_GPL(sysfs_rename_dir);
-
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 4013d7905e84..d0e3d8495165 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -364,9 +364,9 @@ int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type)
         umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
         int error = 0;
 
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         error = sysfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type);
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 
         return error;
 }
@@ -398,7 +398,7 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
         struct dentry * victim;
         int res = -ENOENT;
 
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         victim = lookup_one_len(attr->name, dir, strlen(attr->name));
         if (!IS_ERR(victim)) {
                 /* make sure dentry is really there */
@@ -420,7 +420,7 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
                  */
                 dput(victim);
         }
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 
         return res;
 }
@@ -441,22 +441,22 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
         struct iattr newattrs;
         int res = -ENOENT;
 
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         victim = lookup_one_len(attr->name, dir, strlen(attr->name));
         if (!IS_ERR(victim)) {
                 if (victim->d_inode &&
                     (victim->d_parent->d_inode == dir->d_inode)) {
                         inode = victim->d_inode;
-                        down(&inode->i_sem);
+                        mutex_lock(&inode->i_mutex);
                         newattrs.ia_mode = (mode & S_IALLUGO) |
                                                 (inode->i_mode & ~S_IALLUGO);
                         newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
                         res = notify_change(victim, &newattrs);
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
                 }
                 dput(victim);
         }
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 
         return res;
 }
@@ -480,4 +480,3 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
 EXPORT_SYMBOL_GPL(sysfs_create_file);
 EXPORT_SYMBOL_GPL(sysfs_remove_file);
 EXPORT_SYMBOL_GPL(sysfs_update_file);
-
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 970a33f03299..c3133219941c 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -201,7 +201,7 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)
 
 /*
  * Unhashes the dentry corresponding to given sysfs_dirent
- * Called with parent inode's i_sem held.
+ * Called with parent inode's i_mutex held.
  */
 void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent)
 {
@@ -232,7 +232,7 @@ void sysfs_hash_and_remove(struct dentry * dir, const char * name)
                 /* no inode means this hasn't been made visible yet */
                 return;
 
-        down(&dir->d_inode->i_sem);
+        mutex_lock(&dir->d_inode->i_mutex);
         list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
                 if (!sd->s_element)
                         continue;
@@ -243,7 +243,5 @@ void sysfs_hash_and_remove(struct dentry * dir, const char * name)
                         break;
                 }
         }
-        up(&dir->d_inode->i_sem);
+        mutex_unlock(&dir->d_inode->i_mutex);
 }
-
-
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index de402fa915f2..e38d6338a20d 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -86,9 +86,9 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
 
         BUG_ON(!kobj || !kobj->dentry || !name);
 
-        down(&dentry->d_inode->i_sem);
+        mutex_lock(&dentry->d_inode->i_mutex);
         error = sysfs_add_link(dentry, name, target);
-        up(&dentry->d_inode->i_sem);
+        mutex_unlock(&dentry->d_inode->i_mutex);
         return error;
 }
 
@@ -177,4 +177,3 @@ struct inode_operations sysfs_symlink_inode_operations = {
 
 EXPORT_SYMBOL_GPL(sysfs_create_link);
 EXPORT_SYMBOL_GPL(sysfs_remove_link);
-
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 2ba11a9aa995..e9a42c711a9e 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1275,7 +1275,7 @@ static ssize_t ufs_quota_write(struct super_block *sb, int type,
         size_t towrite = len;
         struct buffer_head *bh;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         while (towrite > 0) {
                 tocopy = sb->s_blocksize - offset < towrite ?
                                 sb->s_blocksize - offset : towrite;
@@ -1297,7 +1297,7 @@ static ssize_t ufs_quota_write(struct super_block *sb, int type,
         }
 out:
         if (len == towrite) {
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
                 return err;
         }
         if (inode->i_size < off+len-towrite)
@@ -1305,7 +1305,7 @@ out:
         inode->i_version++;
         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
         mark_inode_dirty(inode);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return len - towrite;
 }
 
diff --git a/fs/xattr.c b/fs/xattr.c
index bcc2156d4d28..386a532ee5a9 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -51,7 +51,7 @@ setxattr(struct dentry *d, char __user *name, void __user *value,
                 }
         }
 
-        down(&d->d_inode->i_sem);
+        mutex_lock(&d->d_inode->i_mutex);
         error = security_inode_setxattr(d, kname, kvalue, size, flags);
         if (error)
                 goto out;
@@ -73,7 +73,7 @@ setxattr(struct dentry *d, char __user *name, void __user *value,
                         fsnotify_xattr(d);
         }
 out:
-        up(&d->d_inode->i_sem);
+        mutex_unlock(&d->d_inode->i_mutex);
         kfree(kvalue);
         return error;
 }
@@ -323,9 +323,9 @@ removexattr(struct dentry *d, char __user *name)
                 error = security_inode_removexattr(d, kname);
                 if (error)
                         goto out;
-                down(&d->d_inode->i_sem);
+                mutex_lock(&d->d_inode->i_mutex);
                 error = d->d_inode->i_op->removexattr(d, kname);
-                up(&d->d_inode->i_sem);
+                mutex_unlock(&d->d_inode->i_mutex);
                 if (!error)
                         fsnotify_xattr(d);
         }
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 14215a7db59f..41c478bb1ffc 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -203,7 +203,7 @@ validate_fields(
                 ip->i_nlink = va.va_nlink;
                 ip->i_blocks = va.va_nblocks;
 
-                /* we're under i_sem so i_size can't change under us */
+                /* we're under i_mutex so i_size can't change under us */
                 if (i_size_read(ip) != va.va_size)
                         i_size_write(ip, va.va_size);
         }
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 279e9bc92aba..5675117ef227 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -254,7 +254,7 @@ xfs_read(
         }
 
         if (unlikely(ioflags & IO_ISDIRECT))
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
         xfs_ilock(ip, XFS_IOLOCK_SHARED);
 
         if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) &&
@@ -286,7 +286,7 @@ xfs_read(
 
 unlock_isem:
         if (unlikely(ioflags & IO_ISDIRECT))
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
@@ -655,7 +655,7 @@ relock:
                 iolock = XFS_IOLOCK_EXCL;
                 locktype = VRWLOCK_WRITE;
 
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
         } else {
                 iolock = XFS_IOLOCK_SHARED;
                 locktype = VRWLOCK_WRITE_DIRECT;
@@ -686,7 +686,7 @@ start:
                 int             dmflags = FILP_DELAY_FLAG(file);
 
                 if (need_isem)
-                        dmflags |= DM_FLAGS_ISEM;
+                        dmflags |= DM_FLAGS_IMUX;
 
                 xfs_iunlock(xip, XFS_ILOCK_EXCL);
                 error = XFS_SEND_DATA(xip->i_mount, DM_EVENT_WRITE, vp,
@@ -772,7 +772,7 @@ retry:
                 if (need_isem) {
                         /* demote the lock now the cached pages are gone */
                         XFS_ILOCK_DEMOTE(mp, io, XFS_IOLOCK_EXCL);
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
 
                         iolock = XFS_IOLOCK_SHARED;
                         locktype = VRWLOCK_WRITE_DIRECT;
@@ -817,14 +817,14 @@ retry:
 
                 xfs_rwunlock(bdp, locktype);
                 if (need_isem)
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
                 error = XFS_SEND_NAMESP(xip->i_mount, DM_EVENT_NOSPACE, vp,
                                 DM_RIGHT_NULL, vp, DM_RIGHT_NULL, NULL, NULL,
                                 0, 0, 0); /* Delay flag intentionally  unused */
                 if (error)
                         goto out_nounlocks;
                 if (need_isem)
-                        down(&inode->i_sem);
+                        mutex_lock(&inode->i_mutex);
                 xfs_rwlock(bdp, locktype);
                 pos = xip->i_d.di_size;
                 ret = 0;
@@ -926,7 +926,7 @@ retry:
         
                 xfs_rwunlock(bdp, locktype);
                 if (need_isem)
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
 
                 error = sync_page_range(inode, mapping, pos, ret);
                 if (!error)
@@ -938,7 +938,7 @@ retry:
         xfs_rwunlock(bdp, locktype);
  out_unlock_isem:
         if (need_isem)
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
  out_nounlocks:
         return -error;
 }
diff --git a/fs/xfs/xfs_dmapi.h b/fs/xfs/xfs_dmapi.h
index 864bf6955689..b4c7f2bc55a0 100644
--- a/fs/xfs/xfs_dmapi.h
+++ b/fs/xfs/xfs_dmapi.h
@@ -152,7 +152,7 @@ typedef enum {
 
 #define DM_FLAGS_NDELAY         0x001   /* return EAGAIN after dm_pending() */
 #define DM_FLAGS_UNWANTED       0x002   /* event not in fsys dm_eventset_t */
-#define DM_FLAGS_ISEM           0x004   /* thread holds i_sem */
+#define DM_FLAGS_IMUX           0x004   /* thread holds i_mutex */
 #define DM_FLAGS_IALLOCSEM_RD   0x010   /* thread holds i_alloc_sem rd */
 #define DM_FLAGS_IALLOCSEM_WR   0x020   /* thread holds i_alloc_sem wr */
 
@@ -161,21 +161,21 @@ typedef enum {
  */
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
 #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
-                              DM_FLAGS_ISEM : 0)
-#define DM_SEM_FLAG_WR  (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM)
+                              DM_FLAGS_IMUX : 0)
+#define DM_SEM_FLAG_WR  (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_IMUX)
 #endif
 
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) && \
     (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,22))
 #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
-                              DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM)
-#define DM_SEM_FLAG_WR  (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM)
+                              DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_IMUX)
+#define DM_SEM_FLAG_WR  (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_IMUX)
 #endif
 
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,21)
 #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
-                              0 : DM_FLAGS_ISEM)
-#define DM_SEM_FLAG_WR  (DM_FLAGS_ISEM)
+                              0 : DM_FLAGS_IMUX)
+#define DM_SEM_FLAG_WR  (DM_FLAGS_IMUX)
 #endif