1 files changed, 36 insertions, 21 deletions

diff --git a/fs/inode.c b/fs/inode.c
index d8d04bd72b59..108138d4e909 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -22,6 +22,7 @@
 #include <linux/cdev.h>
 #include <linux/bootmem.h>
 #include <linux/inotify.h>
+#include <linux/mount.h>
 
 /*
  * This is needed for the following functions:
@@ -192,7 +193,7 @@ 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);
@@ -770,7 +771,7 @@ EXPORT_SYMBOL(igrab);
  *
  * Note, @test is called with the inode_lock held, so can't sleep.
  */
-static inline struct inode *ifind(struct super_block *sb,
+static struct inode *ifind(struct super_block *sb,
                 struct hlist_head *head, int (*test)(struct inode *, void *),
                 void *data, const int wait)
 {
@@ -804,7 +805,7 @@ static inline struct inode *ifind(struct super_block *sb,
  *
  * Otherwise NULL is returned.
  */
-static inline struct inode *ifind_fast(struct super_block *sb,
+static struct inode *ifind_fast(struct super_block *sb,
                 struct hlist_head *head, unsigned long ino)
 {
         struct inode *inode;
@@ -1176,22 +1177,33 @@ sector_t bmap(struct inode * inode, sector_t block)
 EXPORT_SYMBOL(bmap);
 
 /**
- *      update_atime    -       update the access time
+ *      touch_atime     -       update the access time
+ *      @mnt: mount the inode is accessed on
  *      @inode: inode accessed
  *
  *      Update the accessed time on an inode and mark it for writeback.
  *      This function automatically handles read only file systems and media,
  *      as well as the "noatime" flag and inode specific "noatime" markers.
  */
-void update_atime(struct inode *inode)
+void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
 {
+        struct inode *inode = dentry->d_inode;
         struct timespec now;
 
-        if (IS_NOATIME(inode))
+        if (IS_RDONLY(inode))
                 return;
-        if (IS_NODIRATIME(inode) && S_ISDIR(inode->i_mode))
+
+        if ((inode->i_flags & S_NOATIME) ||
+            (inode->i_sb->s_flags & MS_NOATIME) ||
+            ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
                 return;
-        if (IS_RDONLY(inode))
+
+        /*
+         * We may have a NULL vfsmount when coming from NFSD
+         */
+        if (mnt &&
+            ((mnt->mnt_flags & MNT_NOATIME) ||
+             ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))))
                 return;
 
         now = current_fs_time(inode->i_sb);
@@ -1201,19 +1213,23 @@ void update_atime(struct inode *inode)
         }
 }
 
-EXPORT_SYMBOL(update_atime);
+EXPORT_SYMBOL(touch_atime);
 
 /**
- *      inode_update_time       -       update mtime and ctime time
- *      @inode: inode accessed
- *      @ctime_too: update ctime too
+ *      file_update_time        -       update mtime and ctime time
+ *      @file: file accessed
  *
- *      Update the mtime time on an inode and mark it for writeback.
- *      When ctime_too is specified update the ctime too.
+ *      Update the mtime and ctime members of an inode and mark the inode
+ *      for writeback.  Note that this function is meant exclusively for
+ *      usage in the file write path of filesystems, and filesystems may
+ *      choose to explicitly ignore update via this function with the
+ *      S_NOCTIME inode flag, e.g. for network filesystem where these
+ *      timestamps are handled by the server.
  */
 
-void inode_update_time(struct inode *inode, int ctime_too)
+void file_update_time(struct file *file)
 {
+        struct inode *inode = file->f_dentry->d_inode;
         struct timespec now;
         int sync_it = 0;
 
@@ -1227,16 +1243,15 @@ void inode_update_time(struct inode *inode, int ctime_too)
                 sync_it = 1;
         inode->i_mtime = now;
 
-        if (ctime_too) {
-                if (!timespec_equal(&inode->i_ctime, &now))
-                        sync_it = 1;
-                inode->i_ctime = now;
-        }
+        if (!timespec_equal(&inode->i_ctime, &now))
+                sync_it = 1;
+        inode->i_ctime = now;
+
         if (sync_it)
                 mark_inode_dirty_sync(inode);
 }
 
-EXPORT_SYMBOL(inode_update_time);
+EXPORT_SYMBOL(file_update_time);
 
 int inode_needs_sync(struct inode *inode)
 {