mm: bdi: allow setting a minimum for the bdi dirty limit

[safe/jmp/linux-2.6] / include / linux / backing-dev.h

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 4d9222c..9a89655 100644 (file)
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -10,9 +10,12 @@
 
 #include <linux/percpu_counter.h>
 #include <linux/log2.h>
+#include <linux/proportions.h>
+#include <linux/kernel.h>
 #include <asm/atomic.h>
 
 struct page;
+struct device;
 
 /*
  * Bits in backing_dev_info.state
@@ -44,11 +47,23 @@ struct backing_dev_info {
        void *unplug_io_data;
 
        struct percpu_counter bdi_stat[NR_BDI_STAT_ITEMS];
+
+       struct prop_local_percpu completions;
+       int dirty_exceeded;
+
+       unsigned int min_ratio;
+
+       struct device *dev;
 };
 
 int bdi_init(struct backing_dev_info *bdi);
 void bdi_destroy(struct backing_dev_info *bdi);
 
+int bdi_register(struct backing_dev_info *bdi, struct device *parent,
+               const char *fmt, ...);
+int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
+void bdi_unregister(struct backing_dev_info *bdi);
+
 static inline void __add_bdi_stat(struct backing_dev_info *bdi,
                enum bdi_stat_item item, s64 amount)
 {
@@ -124,6 +139,8 @@ static inline unsigned long bdi_stat_error(struct backing_dev_info *bdi)
 #endif
 }
 
+int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio);
+
 /*
  * Flags in backing_dev_info::capability
  * - The first two flags control whether dirty pages will contribute to the
@@ -152,9 +169,7 @@ static inline unsigned long bdi_stat_error(struct backing_dev_info *bdi)
 extern struct backing_dev_info default_backing_dev_info;
 void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page);
 
-int writeback_acquire(struct backing_dev_info *bdi);
 int writeback_in_progress(struct backing_dev_info *bdi);
-void writeback_release(struct backing_dev_info *bdi);
 
 static inline int bdi_congested(struct backing_dev_info *bdi, int bdi_bits)
 {