[PATCH v4 7/7] VFS: reserve a d_flags bit for fs-specific usage

[NeilBrown]

From: NeilBrown <neil@xxxxxxxxxx>

DCACHE_PRIVATE may be used by any filesystem for its own purposes, much
like d_fsdata and d_time.
I plan to use this in a similar manner the way nfs stores
NFS_FSDATA_BLOCKED in d_fsdata.

Signed-off-by: NeilBrown <neil@xxxxxxxxxx>
---
 include/linux/dcache.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index e7e3ef05313b..adf239f8205f 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -238,7 +238,9 @@ enum dentry_flags {
 	DCACHE_PAR_LOOKUP		= BIT(24),	/* being looked up (with parent locked shared) */
 	DCACHE_DENTRY_CURSOR		= BIT(25),
 	DCACHE_NORCU			= BIT(26),	/* No RCU delay for freeing */
-	DCACHE_PERSISTENT		= BIT(27)
+	DCACHE_PERSISTENT		= BIT(27),
+/* 28, 29, 30 free */
+	DCACHE_PRIVATE			= BIT(31)	/* fs-specific flag */
 };
 
 #define DCACHE_MANAGED_DENTRY \
-- 
2.50.0.107.gf914562f5916.dirty