Merge branch 'dentry-cleanups' (dcache access cleanups and optimizations)

This branch simplifies and clarifies the dcache lookup, and allows us to
do certain nice optimizations when comparing dentries.  It also cleans
up the interface to __d_lookup_rcu(), especially around passing the
inode information around.

* dentry-cleanups:
  vfs: make it possible to access the dentry hash/len as one 64-bit entry
  vfs: move dentry name length comparison from dentry_cmp() into callers
  vfs: do the careful dentry name access for all dentry_cmp cases
  vfs: remove unnecessary d_unhashed() check from __d_lookup_rcu
  vfs: clean up __d_lookup_rcu() and dentry_cmp() interfaces

2 files changed, 3 insertions, 8 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index adf2990acebf..7fee13b331d1 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -127,9 +127,7 @@ static struct dentry *rpc_setup_pipedir_sb(struct super_block *sb,
 {
         static uint32_t clntid;
         char name[15];
-        struct qstr q = {
-                .name = name,
-        };
+        struct qstr q = { .name = name };
         struct dentry *dir, *dentry;
         int error;
 
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 3b62cf288031..fd2423991c2d 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1059,12 +1059,9 @@ static const struct rpc_filelist files[] = {
 struct dentry *rpc_d_lookup_sb(const struct super_block *sb,
                                const unsigned char *dir_name)
 {
-        struct qstr dir = {
-                .name = dir_name,
-                .len = strlen(dir_name),
-                .hash = full_name_hash(dir_name, strlen(dir_name)),
-        };
+        struct qstr dir = QSTR_INIT(dir_name, strlen(dir_name));
 
+        dir.hash = full_name_hash(dir.name, dir.len);
         return d_lookup(sb->s_root, &dir);
 }
 EXPORT_SYMBOL_GPL(rpc_d_lookup_sb);