[PATCH 2/3] Revert: "VFS: Add a whiteout dentry type"

[Goldwyn Rodrigues <rgoldwyn@suse.de>]

From: Goldwyn Rodrigues <rgoldwyn@suse.com>

Reverts e7f7d2253c05 ("VFS: Add a whiteout dentry type")
No users of DCACHE_WHITEOUT_TYPE. Overlay uses its own
flags to represent whiteouts.

d_is_miss() is not used.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
 include/linux/dcache.h | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 39d377ba4208..6bb1ba14af8d 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -202,13 +202,13 @@ struct dentry_operations {
 #define DCACHE_LRU_LIST			0x00080000
 
 #define DCACHE_ENTRY_TYPE		0x00700000
-#define DCACHE_MISS_TYPE		0x00000000 /* Negative dentry (maybe fallthru to nowhere) */
+#define DCACHE_MISS_TYPE		0x00000000 /* Negative dentry */
 #define DCACHE_WHITEOUT_TYPE		0x00100000 /* Whiteout dentry (stop pathwalk) */
 #define DCACHE_DIRECTORY_TYPE		0x00200000 /* Normal directory */
 #define DCACHE_AUTODIR_TYPE		0x00300000 /* Lookupless directory (presumed automount) */
-#define DCACHE_REGULAR_TYPE		0x00400000 /* Regular file type (or fallthru to such) */
-#define DCACHE_SPECIAL_TYPE		0x00500000 /* Other file type (or fallthru to such) */
-#define DCACHE_SYMLINK_TYPE		0x00600000 /* Symlink (or fallthru to such) */
+#define DCACHE_REGULAR_TYPE		0x00400000 /* Regular file type */
+#define DCACHE_SPECIAL_TYPE		0x00500000 /* Other file type */
+#define DCACHE_SYMLINK_TYPE		0x00600000 /* Symlink */
 
 #define DCACHE_MAY_FREE			0x00800000
 #define DCACHE_ENCRYPTED_WITH_KEY	0x02000000 /* dir is encrypted with a valid key */
@@ -393,16 +393,6 @@ static inline unsigned __d_entry_type(const struct dentry *dentry)
 	return dentry->d_flags & DCACHE_ENTRY_TYPE;
 }
 
-static inline bool d_is_miss(const struct dentry *dentry)
-{
-	return __d_entry_type(dentry) == DCACHE_MISS_TYPE;
-}
-
-static inline bool d_is_whiteout(const struct dentry *dentry)
-{
-	return __d_entry_type(dentry) == DCACHE_WHITEOUT_TYPE;
-}
-
 static inline bool d_can_lookup(const struct dentry *dentry)
 {
 	return __d_entry_type(dentry) == DCACHE_DIRECTORY_TYPE;
@@ -440,8 +430,7 @@ static inline bool d_is_file(const struct dentry *dentry)
 
 static inline bool d_is_negative(const struct dentry *dentry)
 {
-	// TODO: check d_is_whiteout(dentry) also.
-	return d_is_miss(dentry);
+	return __d_entry_type(dentry) == DCACHE_MISS_TYPE;
 }
 
 static inline bool d_is_positive(const struct dentry *dentry)
-- 
2.16.4