Function vm_page_grab_check

freebsd/vm/vm_page.c:4401–4412

* Assert that the grab flags are valid. */

 * Assert that the grab flags are valid.
 */
static inline void
vm_page_grab_check(int allocflags)
{

	KASSERT((allocflags & VM_ALLOC_NOBUSY) == 0 ||
	    (allocflags & VM_ALLOC_WIRED) != 0,
	    ("vm_page_grab*: the pages must be busied or wired"));

	KASSERT((allocflags & VM_ALLOC_SBUSY) == 0 ||
	    (allocflags & VM_ALLOC_IGN_SBUSY) != 0,
	    ("vm_page_grab*: VM_ALLOC_SBUSY/VM_ALLOC_IGN_SBUSY mismatch"));
}

/*
 * Calculate the page allocation flags for grab.