Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

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

diff --git a/fs/inode.c b/fs/inode.c
index bf6bec4e54ff648b4696c04909dcf2a5000c8748..e6d93070f1402e249f9f1be017b4831033eab1a4 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -97,7 +97,7 @@ static DEFINE_MUTEX(iprune_mutex);
  */
 struct inodes_stat_t inodes_stat;
 
-static kmem_cache_t * inode_cachep __read_mostly;
+static struct kmem_cache * inode_cachep __read_mostly;
 
 static struct inode *alloc_inode(struct super_block *sb)
 {
@@ -109,7 +109,7 @@ static struct inode *alloc_inode(struct super_block *sb)
        if (sb->s_op->alloc_inode)
                inode = sb->s_op->alloc_inode(sb);
        else
-               inode = (struct inode *) kmem_cache_alloc(inode_cachep, SLAB_KERNEL);
+               inode = (struct inode *) kmem_cache_alloc(inode_cachep, GFP_KERNEL);
 
        if (inode) {
                struct address_space * const mapping = &inode->i_data;
@@ -162,7 +162,7 @@ static struct inode *alloc_inode(struct super_block *sb)
                                bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
                        mapping->backing_dev_info = bdi;
                }
-               inode->i_private = 0;
+               inode->i_private = NULL;
                inode->i_mapping = mapping;
        }
        return inode;
@@ -209,7 +209,7 @@ void inode_init_once(struct inode *inode)
 
 EXPORT_SYMBOL(inode_init_once);
 
-static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
 {
        struct inode * inode = (struct inode *) foo;
 
@@ -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);
 
 /**
@@ -1200,7 +1214,7 @@ EXPORT_SYMBOL(touch_atime);
 
 void file_update_time(struct file *file)
 {
-       struct inode *inode = file->f_dentry->d_inode;
+       struct inode *inode = file->f_path.dentry->d_inode;
        struct timespec now;
        int sync_it = 0;
 
@@ -1242,9 +1256,6 @@ EXPORT_SYMBOL(inode_needs_sync);
  */
 #ifdef CONFIG_QUOTA
 
-/* Function back in dquot.c */
-int remove_inode_dquot_ref(struct inode *, int, struct list_head *);
-
 void remove_dquot_ref(struct super_block *sb, int type,
                        struct list_head *tofree_head)
 {
@@ -1306,6 +1317,42 @@ void wake_up_inode(struct inode *inode)
        wake_up_bit(&inode->i_state, __I_LOCK);
 }
 
+/*
+ * We rarely want to lock two inodes that do not have a parent/child
+ * relationship (such as directory, child inode) simultaneously. The
+ * vast majority of file systems should be able to get along fine
+ * without this. Do not use these functions except as a last resort.
+ */
+void inode_double_lock(struct inode *inode1, struct inode *inode2)
+{
+       if (inode1 == NULL || inode2 == NULL || inode1 == inode2) {
+               if (inode1)
+                       mutex_lock(&inode1->i_mutex);
+               else if (inode2)
+                       mutex_lock(&inode2->i_mutex);
+               return;
+       }
+
+       if (inode1 < inode2) {
+               mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
+               mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
+       } else {
+               mutex_lock_nested(&inode2->i_mutex, I_MUTEX_PARENT);
+               mutex_lock_nested(&inode1->i_mutex, I_MUTEX_CHILD);
+       }
+}
+EXPORT_SYMBOL(inode_double_lock);
+
+void inode_double_unlock(struct inode *inode1, struct inode *inode2)
+{
+       if (inode1)
+               mutex_unlock(&inode1->i_mutex);
+
+       if (inode2 && inode2 != inode1)
+               mutex_unlock(&inode2->i_mutex);
+}
+EXPORT_SYMBOL(inode_double_unlock);
+
 static __initdata unsigned long ihash_entries;
 static int __init set_ihash_entries(char *str)
 {