[patch 7/9] mm: make global_dirtyable_memory() available to other mm code

[Johannes Weiner <hannes@xxxxxxxxxxx>]

Subsequent patches need a rough estimate of memory available for page
cache.

Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
---
 include/linux/writeback.h | 1 +
 mm/page-writeback.c       | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 4e198ca..4c26df7 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -154,6 +154,7 @@ struct ctl_table;
 int dirty_writeback_centisecs_handler(struct ctl_table *, int,
 				      void __user *, size_t *, loff_t *);
 
+unsigned long global_dirtyable_memory(void);
 void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty);
 unsigned long bdi_dirty_limit(struct backing_dev_info *bdi,
 			       unsigned long dirty);
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index d374b29..60376ad 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -231,7 +231,7 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
  * Returns the global number of pages potentially available for dirty
  * page cache.  This is the base value for the global dirty limits.
  */
-static unsigned long global_dirtyable_memory(void)
+unsigned long global_dirtyable_memory(void)
 {
 	unsigned long x;
 
-- 
1.8.3.2

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