[PATCH 1/3] replace PAGECACHE_TAG_* definition with enumeration

[Naoya Horiguchi]

We need number of pagecache tags in later patches, this patch prepares it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
---
 include/linux/fs.h | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git v3.15-rc7.orig/include/linux/fs.h v3.15-rc7/include/linux/fs.h
index 878031227c57..5b489df9d964 100644
--- v3.15-rc7.orig/include/linux/fs.h
+++ v3.15-rc7/include/linux/fs.h
@@ -447,9 +447,12 @@ struct block_device {
  * Radix-tree tags, for tagging dirty and writeback pages within the pagecache
  * radix trees
  */
-#define PAGECACHE_TAG_DIRTY	0
-#define PAGECACHE_TAG_WRITEBACK	1
-#define PAGECACHE_TAG_TOWRITE	2
+enum {
+	PAGECACHE_TAG_DIRTY,
+	PAGECACHE_TAG_WRITEBACK,
+	PAGECACHE_TAG_TOWRITE,
+	__NR_PAGECACHE_TAGS,
+};
 
 int mapping_tagged(struct address_space *mapping, int tag);
 
-- 
1.9.3

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