[PATCH 2/4] ipc: convert prepare_copy() from macro to function

[Stanislav Kinsbursky <skinsbursky@parallels.com>]

This code works if CONFIG_CHECKPOINT_RESTORE is disabled.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
---
 ipc/msg.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ipc/msg.c b/ipc/msg.c
index f1070c3..ad194f8 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -803,8 +803,15 @@ static inline void free_copy(struct msg_msg *copy)
 		free_msg(copy);
 }
 #else
-#define prepare_copy(buf, sz, msgflg, msgtyp, copy_nr)	ERR_PTR(-ENOSYS)
 #define fill_copy(copy_nr, msg_nr, msg, copy)		NULL
+
+static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz,
+					   int msgflg, long *msgtyp,
+					   unsigned long *copy_number)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
 static inline void free_copy(struct msg_msg *copy)
 {
 }
@@ -819,7 +826,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp,
 	int mode;
 	struct ipc_namespace *ns;
 	struct msg_msg *copy = NULL;
-	unsigned long __maybe_unused copy_number;
+	unsigned long __maybe_unused copy_number = 0;
 
 	if (msqid < 0 || (long) bufsz < 0)
 		return -EINVAL;