Auto merge with /home/aegl/GIT/linus

[linux-2.6] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 929bf8d20c8743e228a819b715355e1051f59bb1..302ec20838caa6bcde0ce7c2303d22f72d1d6e1d 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -213,6 +213,7 @@ extern int dir_notify_enable;
 #include <linux/radix-tree.h>
 #include <linux/prio_tree.h>
 #include <linux/init.h>
+#include <linux/sched.h>
 
 #include <asm/atomic.h>
 #include <asm/semaphore.h>
@@ -330,6 +331,8 @@ struct address_space_operations {
        int (*releasepage) (struct page *, int);
        ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
                        loff_t offset, unsigned long nr_segs);
+       struct page* (*get_xip_page)(struct address_space *, sector_t,
+                       int);
 };
 
 struct backing_dev_info;
@@ -820,16 +823,34 @@ enum {
 #define vfs_check_frozen(sb, level) \
        wait_event((sb)->s_wait_unfrozen, ((sb)->s_frozen < (level)))
 
+static inline void get_fs_excl(void)
+{
+       atomic_inc(&current->fs_excl);
+}
+
+static inline void put_fs_excl(void)
+{
+       atomic_dec(&current->fs_excl);
+}
+
+static inline int has_fs_excl(void)
+{
+       return atomic_read(&current->fs_excl);
+}
+
+
 /*
  * Superblock locking.
  */
 static inline void lock_super(struct super_block * sb)
 {
+       get_fs_excl();
        down(&sb->s_lock);
 }
 
 static inline void unlock_super(struct super_block * sb)
 {
+       put_fs_excl();
        up(&sb->s_lock);
 }
 
@@ -1414,6 +1435,7 @@ extern struct inode * igrab(struct inode *);
 extern ino_t iunique(struct super_block *, ino_t);
 extern int inode_needs_sync(struct inode *inode);
 extern void generic_delete_inode(struct inode *inode);
+extern void generic_drop_inode(struct inode *inode);
 
 extern struct inode *ilookup5(struct super_block *sb, unsigned long hashval,
                int (*test)(struct inode *, void *), void *data);
@@ -1497,6 +1519,23 @@ extern loff_t remote_llseek(struct file *file, loff_t offset, int origin);
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);
 
+#ifdef CONFIG_FS_XIP
+extern ssize_t xip_file_read(struct file *filp, char __user *buf, size_t len,
+                            loff_t *ppos);
+extern ssize_t xip_file_sendfile(struct file *in_file, loff_t *ppos,
+                                size_t count, read_actor_t actor,
+                                void *target);
+extern int xip_file_mmap(struct file * file, struct vm_area_struct * vma);
+extern ssize_t xip_file_write(struct file *filp, const char __user *buf,
+                             size_t len, loff_t *ppos);
+extern int xip_truncate_page(struct address_space *mapping, loff_t from);
+#else
+static inline int xip_truncate_page(struct address_space *mapping, loff_t from)
+{
+       return 0;
+}
+#endif
+
 static inline void do_generic_file_read(struct file * filp, loff_t *ppos,
                                        read_descriptor_t * desc,
                                        read_actor_t actor)