path: root/ipc/msg.c
diff options
authorStanislav Kinsbursky <skinsbursky@parallels.com>2013-01-04 15:34:58 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-01-04 16:11:45 -0800
commit85398aa8de1d68f44ff1b5d0ed9ceb2b0c51ce49 (patch)
tree945dba3d9fdb7a607134955b50cdeedf6520d2dd /ipc/msg.c
parentselftests: IPC message queue copy feature test (diff)
ipc: simplify free_copy() call
Passing and checking of msgflg to free_copy() is redundant. This patch sets copy to NULL on declaration instead and checks for non-NULL in free_copy(). Note: in case of copy allocation failure, error is returned immediately. So no need to check for IS_ERR() in free_copy(). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
1 files changed, 8 insertions, 6 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index d20ffc7d3f24..7a20536c3a50 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -797,15 +797,17 @@ static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz,
return copy;
-static inline void free_copy(int msgflg, struct msg_msg *copy)
+static inline void free_copy(struct msg_msg *copy)
- if (msgflg & MSG_COPY)
+ if (copy)
-#define free_copy(msgflg, copy) do {} while (0)
#define prepare_copy(buf, sz, msgflg, msgtyp, copy_nr) ERR_PTR(-ENOSYS)
#define fill_copy(copy_nr, msg_nr, msg, copy) NULL
+static inline void free_copy(struct msg_msg *copy)
long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp,
@@ -816,7 +818,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp,
struct msg_msg *msg;
int mode;
struct ipc_namespace *ns;
- struct msg_msg *copy;
+ struct msg_msg *copy = NULL;
unsigned long __maybe_unused copy_number;
if (msqid < 0 || (long) bufsz < 0)
@@ -831,7 +833,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp,
msq = msg_lock_check(ns, msqid);
if (IS_ERR(msq)) {
- free_copy(msgflg, copy);
+ free_copy(copy);
return PTR_ERR(msq);
@@ -965,7 +967,7 @@ out_unlock:
if (IS_ERR(msg)) {
- free_copy(msgflg, copy);
+ free_copy(copy);
return PTR_ERR(msg);