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Show First 20 Lines • Show All 355 Lines • ▼ Show 20 Lines	proc_rwmem(struct proc p, struct uio uio)
* If we are writing, then we request vm_fault() to create a private		* If we are writing, then we request vm_fault() to create a private
* copy of each page. Since these copies will not be writeable by the		* copy of each page. Since these copies will not be writeable by the
* process, we must explicity request that they be dirtied.		* process, we must explicity request that they be dirtied.
*/		*/
writing = uio->uio_rw == UIO_WRITE;		writing = uio->uio_rw == UIO_WRITE;
reqprot = writing ? VM_PROT_COPY \| VM_PROT_READ : VM_PROT_READ;		reqprot = writing ? VM_PROT_COPY \| VM_PROT_READ : VM_PROT_READ;
fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL;		fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL;

		if (writing) {
		error = priv_check_cred(p->p_ucred, PRIV_PROC_MEM_WRITE);
		if (error)
		return (error);
		}

/*		/*
* Only map in one page at a time. We don't have to, but it		* Only map in one page at a time. We don't have to, but it
* makes things easier. This way is trivial - right?		* makes things easier. This way is trivial - right?
*/		*/
do {		do {
vm_offset_t uva;		vm_offset_t uva;
u_int len;		u_int len;
vm_page_t m;		vm_page_t m;
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