lockd: convert nsm_mutex to a spinlock

[safe/jmp/linux-2.6] / fs / inode.c

diff --git a/fs/inode.c b/fs/inode.c
index b48324a..27ee1af 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -928,8 +928,6 @@ EXPORT_SYMBOL(ilookup);
  * @set:       callback used to initialize a new struct inode
  * @data:      opaque data pointer to pass to @test and @set
  *
- * This is iget() without the read_inode() portion of get_new_inode().
- *
  * iget5_locked() uses ifind() to search for the inode specified by @hashval
  * and @data in the inode cache and if present it is returned with an increased
  * reference count. This is a generalized version of iget_locked() for file
@@ -966,8 +964,6 @@ EXPORT_SYMBOL(iget5_locked);
  * @sb:                super block of file system
  * @ino:       inode number to get
  *
- * This is iget() without the read_inode() portion of get_new_inode_fast().
- *
  * iget_locked() uses ifind_fast() to search for the inode specified by @ino in
  * the inode cache and if present it is returned with an increased reference
  * count. This is for file systems where the inode number is sufficient for
@@ -1203,63 +1199,41 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
        struct inode *inode = dentry->d_inode;
        struct timespec now;
 
-       if (inode->i_flags & S_NOATIME)
+       if (mnt_want_write(mnt))
                return;
+       if (inode->i_flags & S_NOATIME)
+               goto out;
        if (IS_NOATIME(inode))
-               return;
+               goto out;
        if ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))
-               return;
+               goto out;
 
-       /*
-        * We may have a NULL vfsmount when coming from NFSD
-        */
-       if (mnt) {
-               if (mnt->mnt_flags & MNT_NOATIME)
-                       return;
-               if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
-                       return;
-
-               if (mnt->mnt_flags & MNT_RELATIME) {
-                       /*
-                        * With relative atime, only update atime if the
-                        * previous atime is earlier than either the ctime or
-                        * mtime.
-                        */
-                       if (timespec_compare(&inode->i_mtime,
-                                               &inode->i_atime) < 0 &&
-                           timespec_compare(&inode->i_ctime,
-                                               &inode->i_atime) < 0)
-                               return;
-               }
+       if (mnt->mnt_flags & MNT_NOATIME)
+               goto out;
+       if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
+               goto out;
+       if (mnt->mnt_flags & MNT_RELATIME) {
+               /*
+                * With relative atime, only update atime if the previous
+                * atime is earlier than either the ctime or mtime.
+                */
+               if (timespec_compare(&inode->i_mtime, &inode->i_atime) < 0 &&
+                   timespec_compare(&inode->i_ctime, &inode->i_atime) < 0)
+                       goto out;
        }
 
        now = current_fs_time(inode->i_sb);
        if (timespec_equal(&inode->i_atime, &now))
-               return;
+               goto out;
 
        inode->i_atime = now;
        mark_inode_dirty_sync(inode);
+out:
+       mnt_drop_write(mnt);
 }
 EXPORT_SYMBOL(touch_atime);
 
 /**
- *     inode_inc_iversion      -       increments i_version
- *     @inode: inode that need to be updated
- *
- *     Every time the inode is modified, the i_version field
- *     will be incremented.
- *     The filesystem has to be mounted with i_version flag
- *
- */
-
-void inode_inc_iversion(struct inode *inode)
-{
-       spin_lock(&inode->i_lock);
-       inode->i_version++;
-       spin_unlock(&inode->i_lock);
-}
-
-/**
  *     file_update_time        -       update mtime and ctime time
  *     @file: file accessed
  *
@@ -1276,10 +1250,13 @@ void file_update_time(struct file *file)
        struct inode *inode = file->f_path.dentry->d_inode;
        struct timespec now;
        int sync_it = 0;
+       int err;
 
        if (IS_NOCMTIME(inode))
                return;
-       if (IS_RDONLY(inode))
+
+       err = mnt_want_write(file->f_path.mnt);
+       if (err)
                return;
 
        now = current_fs_time(inode->i_sb);
@@ -1300,6 +1277,7 @@ void file_update_time(struct file *file)
 
        if (sync_it)
                mark_inode_dirty_sync(inode);
+       mnt_drop_write(file->f_path.mnt);
 }
 
 EXPORT_SYMBOL(file_update_time);