forked from Minki/linux
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>
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@ -261,8 +261,9 @@ static void mqueue_delete_inode(struct inode *inode)
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clear_inode(inode);
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mq_bytes = (info->attr.mq_maxmsg * sizeof(struct msg_msg *) +
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(info->attr.mq_maxmsg * info->attr.mq_msgsize));
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/* Total amount of bytes accounted for the mqueue */
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mq_bytes = info->attr.mq_maxmsg * (sizeof(struct msg_msg *)
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+ info->attr.mq_msgsize);
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user = info->user;
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if (user) {
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spin_lock(&mq_lock);
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@ -601,8 +602,8 @@ static int mq_attr_ok(struct ipc_namespace *ipc_ns, struct mq_attr *attr)
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/* check for overflow */
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if (attr->mq_msgsize > ULONG_MAX/attr->mq_maxmsg)
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return 0;
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if ((unsigned long)(attr->mq_maxmsg * attr->mq_msgsize) +
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(attr->mq_maxmsg * sizeof (struct msg_msg *)) <
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if ((unsigned long)(attr->mq_maxmsg * (attr->mq_msgsize
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+ sizeof (struct msg_msg *))) <
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(unsigned long)(attr->mq_maxmsg * attr->mq_msgsize))
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return 0;
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return 1;
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