mqueue: apply mathematics distributivity on mq_bytes calculation

Code size reduction:
   text    data     bss     dec     hex filename
   9941      72      16   10029    272d ipc/mqueue-BEFORE.o
   9925      72      16   10013    271d ipc/mqueue-AFTER.o

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 5 insertions, 4 deletions

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 3660c334ee6b..15eabf9d51fd 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -261,8 +261,9 @@ static void mqueue_delete_inode(struct inode *inode)
 
         clear_inode(inode);
 
-        mq_bytes = (info->attr.mq_maxmsg * sizeof(struct msg_msg *) +
-                   (info->attr.mq_maxmsg * info->attr.mq_msgsize));
+        /* Total amount of bytes accounted for the mqueue */
+        mq_bytes = info->attr.mq_maxmsg * (sizeof(struct msg_msg *)
+            + info->attr.mq_msgsize);
         user = info->user;
         if (user) {
                 spin_lock(&mq_lock);
@@ -601,8 +602,8 @@ static int mq_attr_ok(struct ipc_namespace *ipc_ns, struct mq_attr *attr)
         /* check for overflow */
         if (attr->mq_msgsize > ULONG_MAX/attr->mq_maxmsg)
                 return 0;
-        if ((unsigned long)(attr->mq_maxmsg * attr->mq_msgsize) +
-            (attr->mq_maxmsg * sizeof (struct msg_msg *)) <
+        if ((unsigned long)(attr->mq_maxmsg * (attr->mq_msgsize
+            + sizeof (struct msg_msg *))) <
             (unsigned long)(attr->mq_maxmsg * attr->mq_msgsize))
                 return 0;
         return 1;