Merge master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6

[linux-2.6-omap-h63xx.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7cf0c54a46a7fff64365b3184ea492d572dac9b0..4f0b3bf5983c81fb495794d09b9b5e7c632b17dd 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -938,6 +938,7 @@ struct super_block {
        struct list_head        s_files;
 
        struct block_device     *s_bdev;
+       struct mtd_info         *s_mtd;
        struct list_head        s_instances;
        struct quota_info       s_dquot;        /* Diskquota specific options */
 
@@ -1053,7 +1054,7 @@ struct block_device_operations {
 };
 
 /*
- * "descriptor" for what we're up to with a read for sendfile().
+ * "descriptor" for what we're up to with a read.
  * This allows us to use the same read code yet
  * have multiple different users of the data that
  * we read from a file.
@@ -1104,7 +1105,6 @@ struct file_operations {
        int (*aio_fsync) (struct kiocb *, int datasync);
        int (*fasync) (int, struct file *, int);
        int (*lock) (struct file *, int, struct file_lock *);
-       ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void *);
        ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
        unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
        int (*check_flags)(int);
@@ -1210,6 +1210,14 @@ static inline void mark_inode_dirty_sync(struct inode *inode)
        __mark_inode_dirty(inode, I_DIRTY_SYNC);
 }
 
+/**
+ * inc_nlink - directly increment an inode's link count
+ * @inode: inode
+ *
+ * This is a low-level filesystem helper to replace any
+ * direct filesystem manipulation of i_nlink.  Currently,
+ * it is only here for parity with dec_nlink().
+ */
 static inline void inc_nlink(struct inode *inode)
 {
        inode->i_nlink++;
@@ -1221,11 +1229,30 @@ static inline void inode_inc_link_count(struct inode *inode)
        mark_inode_dirty(inode);
 }
 
+/**
+ * drop_nlink - directly drop an inode's link count
+ * @inode: inode
+ *
+ * This is a low-level filesystem helper to replace any
+ * direct filesystem manipulation of i_nlink.  In cases
+ * where we are attempting to track writes to the
+ * filesystem, a decrement to zero means an imminent
+ * write when the file is truncated and actually unlinked
+ * on the filesystem.
+ */
 static inline void drop_nlink(struct inode *inode)
 {
        inode->i_nlink--;
 }
 
+/**
+ * clear_nlink - directly zero an inode's link count
+ * @inode: inode
+ *
+ * This is a low-level filesystem helper to replace any
+ * direct filesystem manipulation of i_nlink.  See
+ * drop_nlink() for why we care about i_nlink hitting zero.
+ */
 static inline void clear_nlink(struct inode *inode)
 {
        inode->i_nlink = 0;
@@ -1734,7 +1761,6 @@ extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *,
                unsigned long, loff_t, loff_t *, size_t, ssize_t);
 extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
 extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
-extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
 extern void do_generic_mapping_read(struct address_space *mapping,
                                    struct file_ra_state *, struct file *,
                                    loff_t *, read_descriptor_t *, read_actor_t);
@@ -1764,9 +1790,6 @@ 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);