1 files changed, 173 insertions, 0 deletions
diff --git a/libdde_linux26/contrib/include/linux/writeback.h b/libdde_linux26/contrib/include/linux/writeback.h
new file mode 100644
index 00000000..7300ecdc
--- /dev/null
+++ b/libdde_linux26/contrib/include/linux/writeback.h
@@ -0,0 +1,173 @@
+/*
+ * include/linux/writeback.h
+ */
+#ifndef WRITEBACK_H
+#define WRITEBACK_H
+
+#include <linux/sched.h>
+#include <linux/fs.h>
+
+struct backing_dev_info;
+
+extern spinlock_t inode_lock;
+extern struct list_head inode_in_use;
+extern struct list_head inode_unused;
+
+/*
+ * Yes, writeback.h requires sched.h
+ * No, sched.h is not included from here.
+ */
+static inline int task_is_pdflush(struct task_struct *task)
+{
+	return task->flags & PF_FLUSHER;
+}
+
+#define current_is_pdflush()	task_is_pdflush(current)
+
+/*
+ * fs/fs-writeback.c
+ */
+enum writeback_sync_modes {
+	WB_SYNC_NONE,	/* Don't wait on anything */
+	WB_SYNC_ALL,	/* Wait on every mapping */
+};
+
+/*
+ * A control structure which tells the writeback code what to do.  These are
+ * always on the stack, and hence need no locking.  They are always initialised
+ * in a manner such that unspecified fields are set to zero.
+ */
+struct writeback_control {
+	struct backing_dev_info *bdi;	/* If !NULL, only write back this
+					   queue */
+	enum writeback_sync_modes sync_mode;
+	unsigned long *older_than_this;	/* If !NULL, only write back inodes
+					   older than this */
+	long nr_to_write;		/* Write this many pages, and decrement
+					   this for each page written */
+	long pages_skipped;		/* Pages which were not written */
+
+	/*
+	 * For a_ops->writepages(): is start or end are non-zero then this is
+	 * a hint that the filesystem need only write out the pages inside that
+	 * byterange.  The byte at `end' is included in the writeout request.
+	 */
+	loff_t range_start;
+	loff_t range_end;
+
+	unsigned nonblocking:1;		/* Don't get stuck on request queues */
+	unsigned encountered_congestion:1; /* An output: a queue is full */
+	unsigned for_kupdate:1;		/* A kupdate writeback */
+	unsigned for_reclaim:1;		/* Invoked from the page allocator */
+	unsigned for_writepages:1;	/* This is a writepages() call */
+	unsigned range_cyclic:1;	/* range_start is cyclic */
+	unsigned more_io:1;		/* more io to be dispatched */
+	/*
+	 * write_cache_pages() won't update wbc->nr_to_write and
+	 * mapping->writeback_index if no_nrwrite_index_update
+	 * is set.  write_cache_pages() may write more than we
+	 * requested and we want to make sure nr_to_write and
+	 * writeback_index are updated in a consistent manner
+	 * so we use a single control to update them
+	 */
+	unsigned no_nrwrite_index_update:1;
+};
+
+/*
+ * fs/fs-writeback.c
+ */	
+void writeback_inodes(struct writeback_control *wbc);
+int inode_wait(void *);
+void sync_inodes_sb(struct super_block *, int wait);
+void sync_inodes(int wait);
+
+/* writeback.h requires fs.h; it, too, is not included from here. */
+static inline void wait_on_inode(struct inode *inode)
+{
+	might_sleep();
+	wait_on_bit(&inode->i_state, __I_LOCK, inode_wait,
+							TASK_UNINTERRUPTIBLE);
+}
+static inline void inode_sync_wait(struct inode *inode)
+{
+	might_sleep();
+	wait_on_bit(&inode->i_state, __I_SYNC, inode_wait,
+							TASK_UNINTERRUPTIBLE);
+}
+
+
+/*
+ * mm/page-writeback.c
+ */
+int wakeup_pdflush(long nr_pages);
+void laptop_io_completion(void);
+void laptop_sync_completion(void);
+void throttle_vm_writeout(gfp_t gfp_mask);
+
+/* These are exported to sysctl. */
+extern int dirty_background_ratio;
+extern unsigned long dirty_background_bytes;
+extern int vm_dirty_ratio;
+extern unsigned long vm_dirty_bytes;
+extern int dirty_writeback_interval;
+extern int dirty_expire_interval;
+extern int vm_highmem_is_dirtyable;
+extern int block_dump;
+extern int laptop_mode;
+
+extern unsigned long determine_dirtyable_memory(void);
+
+extern int dirty_background_ratio_handler(struct ctl_table *table, int write,
+		struct file *filp, void __user *buffer, size_t *lenp,
+		loff_t *ppos);
+extern int dirty_background_bytes_handler(struct ctl_table *table, int write,
+		struct file *filp, void __user *buffer, size_t *lenp,
+		loff_t *ppos);
+extern int dirty_ratio_handler(struct ctl_table *table, int write,
+		struct file *filp, void __user *buffer, size_t *lenp,
+		loff_t *ppos);
+extern int dirty_bytes_handler(struct ctl_table *table, int write,
+		struct file *filp, void __user *buffer, size_t *lenp,
+		loff_t *ppos);
+
+struct ctl_table;
+struct file;
+int dirty_writeback_centisecs_handler(struct ctl_table *, int, struct file *,
+				      void __user *, size_t *, loff_t *);
+
+void get_dirty_limits(unsigned long *pbackground, unsigned long *pdirty,
+		      unsigned long *pbdi_dirty, struct backing_dev_info *bdi);
+
+void page_writeback_init(void);
+void balance_dirty_pages_ratelimited_nr(struct address_space *mapping,
+					unsigned long nr_pages_dirtied);
+
+static inline void
+balance_dirty_pages_ratelimited(struct address_space *mapping)
+{
+	balance_dirty_pages_ratelimited_nr(mapping, 1);
+}
+
+typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc,
+				void *data);
+
+int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0);
+int generic_writepages(struct address_space *mapping,
+		       struct writeback_control *wbc);
+int write_cache_pages(struct address_space *mapping,
+		      struct writeback_control *wbc, writepage_t writepage,
+		      void *data);
+int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
+int sync_page_range(struct inode *inode, struct address_space *mapping,
+			loff_t pos, loff_t count);
+int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
+			   loff_t pos, loff_t count);
+void set_page_dirty_balance(struct page *page, int page_mkwrite);
+void writeback_set_ratelimit(void);
+
+/* pdflush.c */
+extern int nr_pdflush_threads;	/* Global so it can be exported to sysctl
+				   read-only. */
+
+
+#endif		/* WRITEBACK_H */