Function m_epg_pagelen

freebsd/sys/mbuf.h:397–409

#ifdef _KERNEL
static inline int
m_epg_pagelen(const struct mbuf *m, int pidx, int pgoff)
{

	KASSERT(pgoff == 0 || pidx == 0,
	    ("page %d with non-zero offset %d in %p", pidx, pgoff, m));

	if (pidx == m->m_epg_npgs - 1) {
		return (m->m_epg_last_len);
	} else {
		return (PAGE_SIZE - pgoff);
	}
}

#ifdef INVARIANTS
#define	MCHECK(ex, msg)	KASSERT((ex),				\