Convert uid hash to hlist

Surprisingly, but (spotted by Alexey Dobriyan) the uid hash still uses
list_heads, thus occupying twice as much place as it could.  Convert it to
hlist_heads.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index f4e324ed2e44..6239bc2c2baa 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -593,7 +593,7 @@ struct user_struct {
 #endif
 
         /* Hash table maintenance information */
-        struct list_head uidhash_list;
+        struct hlist_node uidhash_node;
         uid_t uid;
 };
 
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index 1101b0ce878f..b5f41d4c2eec 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -11,7 +11,7 @@
 
 struct user_namespace {
         struct kref             kref;
-        struct list_head        uidhash_table[UIDHASH_SZ];
+        struct hlist_head       uidhash_table[UIDHASH_SZ];
         struct user_struct      *root_user;
 };