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authorDavid Rientjes <rientjes@google.com>2009-01-06 17:39:29 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 18:59:02 -0500
commit364aeb2849789b51bf4b9af2ddd02fee7285c54e (patch)
tree4a24ea43a2a76ae744571f3c7b5022aa1107599e /include
parent58a01a45721bf7bd3a41a86248c3cb02a6b0c501 (diff)
mm: change dirty limit type specifiers to unsigned long
The background dirty and dirty limits are better defined with type specifiers of unsigned long since negative writeback thresholds are not possible. These values, as returned by get_dirty_limits(), are normally compared with ZVC values to determine whether writeback shall commence or be throttled. Such page counts cannot be negative, so declaring the page limits as signed is unnecessary. Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: David Rientjes <rientjes@google.com> Cc: Andrea Righi <righi.andrea@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/writeback.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index e585657e9831..259e9ea58cab 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -125,8 +125,8 @@ struct file;
125int dirty_writeback_centisecs_handler(struct ctl_table *, int, struct file *, 125int dirty_writeback_centisecs_handler(struct ctl_table *, int, struct file *,
126 void __user *, size_t *, loff_t *); 126 void __user *, size_t *, loff_t *);
127 127
128void get_dirty_limits(long *pbackground, long *pdirty, long *pbdi_dirty, 128void get_dirty_limits(unsigned long *pbackground, unsigned long *pdirty,
129 struct backing_dev_info *bdi); 129 unsigned long *pbdi_dirty, struct backing_dev_info *bdi);
130 130
131void page_writeback_init(void); 131void page_writeback_init(void);
132void balance_dirty_pages_ratelimited_nr(struct address_space *mapping, 132void balance_dirty_pages_ratelimited_nr(struct address_space *mapping,