21  * It disallows unmapped regions from start to end whether they exist at the
22  * start, in the middle, or at the end of the range, or any combination thereof.
31  * Does the [start, end) range contain any unmapped memory?
34  * - start is part of a valid VMA.
36  * - no gap (unallocated memory) exists between start and end.
39 		unsigned long start, unsigned long end)  in range_contains_unmapped()  argument
42 	unsigned long prev_end = start;  in range_contains_unmapped()
43 	VMA_ITERATOR(vmi, current->mm, start);  in range_contains_unmapped()
56 		unsigned long start, unsigned long end)  in mseal_apply()  argument
59 	unsigned long curr_start = start;  in mseal_apply()
60 	VMA_ITERATOR(vmi, mm, start);  in mseal_apply()
65 	if (start > vma->vm_start)  in mseal_apply()
94  *   start (addr) must be in a valid VMA.
96  *   no gap (unallocated memory) between start and end.
97  *   start (addr) must be page aligned.
125  *   start address is not page aligned.
126  *   Address arange (start + len) overflow.
129  *   end (start + len) is not a valid address.
130  *   a gap (unallocated memory) between start and end.
139 int do_mseal(unsigned long start, size_t len_in, unsigned long flags)  in do_mseal()  argument
150 	start = untagged_addr(start);  in do_mseal()
151 	if (!PAGE_ALIGNED(start))  in do_mseal()
159 	end = start + len;  in do_mseal()
160 	if (end < start)  in do_mseal()
163 	if (end == start)  in do_mseal()
169 	if (range_contains_unmapped(mm, start, end)) {  in do_mseal()
180 	ret = mseal_apply(mm, start, end);  in do_mseal()
187 SYSCALL_DEFINE3(mseal, unsigned long, start, size_t, len, unsigned long,  in SYSCALL_DEFINE3()  argument
190 	return do_mseal(start, len, flags);  in SYSCALL_DEFINE3()