[PATCH] FS: speed up rw_verify_area()

[linux-drm-fsl-dcu.git] / fs / inode.c

diff --git a/fs/inode.c b/fs/inode.c
index d00de182ecb97fec47c74eb454b89918b6ab3802..5e32432a7608592834e194419f8b3dd0e7ab98f0 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -414,7 +414,8 @@ static void prune_icache(int nr_to_scan)
                        __iget(inode);
                        spin_unlock(&inode_lock);
                        if (remove_inode_buffers(inode))
-                               reap += invalidate_inode_pages(&inode->i_data);
+                               reap += invalidate_mapping_pages(&inode->i_data,
+                                                               0, -1);
                        iput(inode);
                        spin_lock(&inode_lock);
 
@@ -709,7 +710,7 @@ EXPORT_SYMBOL(iunique);
 struct inode *igrab(struct inode *inode)
 {
        spin_lock(&inode_lock);
-       if (!(inode->i_state & (I_FREEING|I_WILL_FREE)))
+       if (!(inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)))
                __iget(inode);
        else
                /*
@@ -1144,7 +1145,6 @@ sector_t bmap(struct inode * inode, sector_t block)
                res = inode->i_mapping->a_ops->bmap(inode->i_mapping, block);
        return res;
 }
-
 EXPORT_SYMBOL(bmap);
 
 /**
@@ -1161,29 +1161,43 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
        struct inode *inode = dentry->d_inode;
        struct timespec now;
 
-       if (IS_RDONLY(inode))
+       if (inode->i_flags & S_NOATIME)
                return;
-
-       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)))
+       if (IS_NOATIME(inode))
+               return;
+       if ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))
                return;
 
        /*
         * 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;
+       if (mnt) {
+               if (mnt->mnt_flags & MNT_NOATIME)
+                       return;
+               if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
+                       return;
 
-       now = current_fs_time(inode->i_sb);
-       if (!timespec_equal(&inode->i_atime, &now)) {
-               inode->i_atime = now;
-               mark_inode_dirty_sync(inode);
+               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;
+               }
        }
-}
 
+       now = current_fs_time(inode->i_sb);
+       if (timespec_equal(&inode->i_atime, &now))
+               return;
+
+       inode->i_atime = now;
+       mark_inode_dirty_sync(inode);
+}
 EXPORT_SYMBOL(touch_atime);
 
 /**
@@ -1237,33 +1251,6 @@ int inode_needs_sync(struct inode *inode)
 
 EXPORT_SYMBOL(inode_needs_sync);
 
-/*
- *     Quota functions that want to walk the inode lists..
- */
-#ifdef CONFIG_QUOTA
-
-void remove_dquot_ref(struct super_block *sb, int type,
-                       struct list_head *tofree_head)
-{
-       struct inode *inode;
-
-       if (!sb->dq_op)
-               return; /* nothing to do */
-       spin_lock(&inode_lock); /* This lock is for inodes code */
-
-       /*
-        * We don't have to lock against quota code - test IS_QUOTAINIT is
-        * just for speedup...
-        */
-       list_for_each_entry(inode, &sb->s_inodes, i_sb_list)
-               if (!IS_NOQUOTA(inode))
-                       remove_inode_dquot_ref(inode, type, tofree_head);
-
-       spin_unlock(&inode_lock);
-}
-
-#endif
-
 int inode_wait(void *word)
 {
        schedule();