--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/shmem_fs.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,65 @@
+#ifndef __SHMEM_FS_H
+#define __SHMEM_FS_H
+
+#include <linux/swap.h>
+#include <linux/mempolicy.h>
+
+/* inode in-kernel data */
+
+#define SHMEM_NR_DIRECT 16
+
+struct shmem_inode_info {
+	spinlock_t		lock;
+	unsigned long		flags;
+	unsigned long		alloced;	/* data pages alloced to file */
+	unsigned long		swapped;	/* subtotal assigned to swap */
+	unsigned long		next_index;	/* highest alloced index + 1 */
+	struct shared_policy	policy;		/* NUMA memory alloc policy */
+	struct page		*i_indirect;	/* top indirect blocks page */
+	swp_entry_t		i_direct[SHMEM_NR_DIRECT]; /* first blocks */
+	struct list_head	swaplist;	/* chain of maybes on swap */
+	struct inode		vfs_inode;
+#ifdef CONFIG_TMPFS_POSIX_ACL
+	struct posix_acl	*i_acl;
+	struct posix_acl	*i_default_acl;
+#endif
+};
+
+struct shmem_sb_info {
+	unsigned long max_blocks;   /* How many blocks are allowed */
+	unsigned long free_blocks;  /* How many are left for allocation */
+	unsigned long max_inodes;   /* How many inodes are allowed */
+	unsigned long free_inodes;  /* How many are left for allocation */
+	spinlock_t stat_lock;	    /* Serialize shmem_sb_info changes */
+	uid_t uid;		    /* Mount uid for root directory */
+	gid_t gid;		    /* Mount gid for root directory */
+	mode_t mode;		    /* Mount mode for root directory */
+	struct mempolicy *mpol;     /* default memory policy for mappings */
+};
+
+static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
+{
+	return container_of(inode, struct shmem_inode_info, vfs_inode);
+}
+
+#ifdef CONFIG_TMPFS_POSIX_ACL
+int shmem_permission(struct inode *, int);
+int shmem_acl_init(struct inode *, struct inode *);
+void shmem_acl_destroy_inode(struct inode *);
+
+extern struct xattr_handler shmem_xattr_acl_access_handler;
+extern struct xattr_handler shmem_xattr_acl_default_handler;
+
+extern struct generic_acl_operations shmem_acl_ops;
+
+#else
+static inline int shmem_acl_init(struct inode *inode, struct inode *dir)
+{
+	return 0;
+}
+static inline void shmem_acl_destroy_inode(struct inode *inode)
+{
+}
+#endif  /* CONFIG_TMPFS_POSIX_ACL */
+
+#endif