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 9a9367c..832f86b 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -148,6 +148,7 @@ 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 efe6814..5e302e6 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
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