1 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
new file mode 100644
index 0000000..c3e5982
--- /dev/null
+++ b/include/linux/shmem_fs.h
@@ -0,0 +1,37 @@
+#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;
+};
+
+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;
+};
+
+static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
+{
+	return container_of(inode, struct shmem_inode_info, vfs_inode);
+}
+
+#endif