Subject: [merged] ipcmsg-introduce-lockless-functions-to-obtain-the-ipc-object.patch removed from -mm tree To: davidlohr.bueso@xxxxxx,andi@xxxxxxxxxxxxxx,riel@xxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Tue, 09 Jul 2013 16:21:43 -0700 The patch titled Subject: ipc,msg: introduce lockless functions to obtain the ipc object has been removed from the -mm tree. Its filename was ipcmsg-introduce-lockless-functions-to-obtain-the-ipc-object.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Davidlohr Bueso <davidlohr.bueso@xxxxxx> Subject: ipc,msg: introduce lockless functions to obtain the ipc object Add msq_obtain_object() and msq_obtain_object_check(), which will allow us to get the ipc object without acquiring the lock. Just as with semaphores, these functions are basically wrappers around ipc_obtain_object*(). Signed-off-by: Davidlohr Bueso <davidlohr.bueso@xxxxxx> Cc: Andi Kleen <andi@xxxxxxxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- ipc/msg.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff -puN ipc/msg.c~ipcmsg-introduce-lockless-functions-to-obtain-the-ipc-object ipc/msg.c --- a/ipc/msg.c~ipcmsg-introduce-lockless-functions-to-obtain-the-ipc-object +++ a/ipc/msg.c @@ -166,6 +166,27 @@ static inline struct msg_queue *msg_lock return container_of(ipcp, struct msg_queue, q_perm); } +static inline struct msg_queue *msq_obtain_object(struct ipc_namespace *ns, int id) +{ + struct kern_ipc_perm *ipcp = ipc_obtain_object(&msg_ids(ns), id); + + if (IS_ERR(ipcp)) + return ERR_CAST(ipcp); + + return container_of(ipcp, struct msg_queue, q_perm); +} + +static inline struct msg_queue *msq_obtain_object_check(struct ipc_namespace *ns, + int id) +{ + struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&msg_ids(ns), id); + + if (IS_ERR(ipcp)) + return ERR_CAST(ipcp); + + return container_of(ipcp, struct msg_queue, q_perm); +} + static inline void msg_rmid(struct ipc_namespace *ns, struct msg_queue *s) { ipc_rmid(&msg_ids(ns), &s->q_perm); _ Patches currently in -mm which might be from davidlohr.bueso@xxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html