From: André Goddard Rosa Date: Tue, 23 Feb 2010 07:04:24 +0000 (-0300) Subject: mqueue: apply mathematics distributivity on mq_bytes calculation X-Git-Tag: v2.6.34-rc1~205^2~5 X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=8834cf796a4320be2d3a70b1e4f9aba732a0f4ee 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 Signed-off-by: Al Viro --- diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 3660c33..15eabf9 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;