From 51eeacaa07d1372a7bc9612548ffe6cd846f4f2f Mon Sep 17 00:00:00 2001
From: Stanislav Kinsbursky <skinsbursky@parallels.com>
Date: Fri, 4 Jan 2013 15:35:01 -0800
Subject: ipc: simplify message copying

Remove the redundant and confusing fill_copy().  Also add copy_msg()
check for error.  In this case exit from the function have to be done
instead of break, because further code interprets any error as EAGAIN.

Also define copy_msg() for the case when CONFIG_CHECKPOINT_RESTORE is
disabled.

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>
---
 ipc/msgutil.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'ipc/msgutil.c')

diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 7eecdad40efc..ebfcbfa8b7f2 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -140,6 +140,11 @@ struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
 
 	return dst;
 }
+#else
+struct msg_msg *copy_msg(struct msg_msg *src, struct msg_msg *dst)
+{
+	return ERR_PTR(-ENOSYS);
+}
 #endif
 int store_msg(void __user *dest, struct msg_msg *msg, int len)
 {
-- 
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