fs: dcache per-bucket dcache hash locking

We can turn the dcache hash locking from a global dcache_hash_lock into
per-bucket locking.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index d5a4d42f655b..baf3e556ff0e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -392,6 +392,7 @@ struct inodes_stat_t {
 #include <linux/capability.h>
 #include <linux/semaphore.h>
 #include <linux/fiemap.h>
+#include <linux/rculist_bl.h>
 
 #include <asm/atomic.h>
 #include <asm/byteorder.h>
@@ -1377,7 +1378,7 @@ struct super_block {
         const struct xattr_handler **s_xattr;
 
         struct list_head        s_inodes;       /* all inodes */
-        struct hlist_head       s_anon;         /* anonymous dentries for (nfs) exporting */
+        struct hlist_bl_head    s_anon;         /* anonymous dentries for (nfs) exporting */
 #ifdef CONFIG_SMP
         struct list_head __percpu *s_files;
 #else