unlock(p.mheapLock)

	return 0
}

// fillAligned returns x but with all zeroes in m-aligned
// groups of m bits set to 1 if any bit in the group is non-zero.
//
// For example, fillAligned(0x0100a3, 8) == 0xff00ff.
//
// Note that if m == 1, this is a no-op.
//
// m must be a power of 2 <= maxPagesPerPhysPage.
func fillAligned(x uint64, m uint) uint64 {
	apply := func(x uint64, c uint64) uint64 {

					break
				}
			}
		}
		return out
	}
	check := func(x uint64, m uint) {
		want := fillAlignedSlow(x, m)
		if got := FillAligned(x, m); got != want {
			t.Logf("got:  %064b", got)
			t.Logf("want: %064b", want)
			t.Errorf("bad fillAligned(%016x, %d)", x, m)
		}
	}
	for m := uint(1); m <= 64; m *= 2 {
		tests := []uint64{
			0x0000000000000000,
			0x00000000ffffffff,
			0xffffffff00000000,

	return (*PallocBits)(&(*pallocData)(d).pallocBits)
}
func (d *PallocData) Scavenged() *PallocBits {
	return (*PallocBits)(&(*pallocData)(d).scavenged)
}

// Expose fillAligned for testing.
func FillAligned(x uint64, m uint) uint64 { return fillAligned(x, m) }

// Expose pageCache for testing.
type PageCache pageCache

const PageCachePages = pageCachePages