ipc: uninline some code from util.h

ipc_lock_check_down(), ipc_lock_check() and ipcget() seem too large to be
inline.  Besides, they give no optimization being inline as they perform
calls inside in any case.

Moving them into ipc/util.c saves 500 bytes of vmlinux and shortens IPC
internal API.

$ ./scripts/bloat-o-meter vmlinux-orig vmlinux
add/remove: 3/2 grow/shrink: 0/10 up/down: 490/-989 (-499)
function                                     old     new   delta
ipcget                                         -     392    +392
ipc_lock_check_down                            -      49     +49
ipc_lock_check                                 -      49     +49
sys_semget                                   119     105     -14
sys_shmget                                   108      86     -22
sys_msgget                                   100      78     -22
do_msgsnd                                    665     631     -34
do_msgrcv                                    680     644     -36
do_shmat                                     771     733     -38
sys_msgctl                                  1302    1229     -73
ipcget_new                                    80       -     -80
sys_semtimedop                              1534    1452     -82
sys_semctl                                  2034    1922    -112
sys_shmctl                                  1919    1765    -154
ipcget_public                                322       -    -322

The ipcget() growth is the result of gcc inlining of currently static
ipcget_new/_public.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 56 deletions

diff --git a/ipc/util.h b/ipc/util.h
index fc6b7294f764..ca245fae2f98 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -131,10 +131,6 @@ int ipc_parse_version (int *cmd);
 extern void free_msg(struct msg_msg *msg);
 extern struct msg_msg *load_msg(const void __user *src, int len);
 extern int store_msg(void __user *dest, struct msg_msg *msg, int len);
-extern int ipcget_new(struct ipc_namespace *, struct ipc_ids *,
-                        struct ipc_ops *, struct ipc_params *);
-extern int ipcget_public(struct ipc_namespace *, struct ipc_ids *,
-                        struct ipc_ops *, struct ipc_params *);
 
 static inline int ipc_buildid(int id, int seq)
 {
@@ -163,57 +159,9 @@ static inline void ipc_unlock(struct kern_ipc_perm *perm)
         rcu_read_unlock();
 }
 
-static inline struct kern_ipc_perm *ipc_lock_check_down(struct ipc_ids *ids,
-                                                int id)
-{
-        struct kern_ipc_perm *out;
-
-        out = ipc_lock_down(ids, id);
-        if (IS_ERR(out))
-                return out;
-
-        if (ipc_checkid(out, id)) {
-                ipc_unlock(out);
-                return ERR_PTR(-EIDRM);
-        }
-
-        return out;
-}
-
-static inline struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids,
-                                                int id)
-{
-        struct kern_ipc_perm *out;
-
-        out = ipc_lock(ids, id);
-        if (IS_ERR(out))
-                return out;
-
-        if (ipc_checkid(out, id)) {
-                ipc_unlock(out);
-                return ERR_PTR(-EIDRM);
-        }
-
-        return out;
-}
-
-/**
- * ipcget - Common sys_*get() code
- * @ns : namsepace
- * @ids : IPC identifier set
- * @ops : operations to be called on ipc object creation, permission checks
- *        and further checks
- * @params : the parameters needed by the previous operations.
- *
- * Common routine called by sys_msgget(), sys_semget() and sys_shmget().
- */
-static inline int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
-                        struct ipc_ops *ops, struct ipc_params *params)
-{
-        if (params->key == IPC_PRIVATE)
-                return ipcget_new(ns, ids, ops, params);
-        else
-                return ipcget_public(ns, ids, ops, params);
-}
+struct kern_ipc_perm *ipc_lock_check_down(struct ipc_ids *ids, int id);
+struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id);
+int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
+                        struct ipc_ops *ops, struct ipc_params *params);
 
 #endif