selftests: mm: add a test for remapping within a range

Move a block of memory within a memory range.  Any alignment optimization
on the source address may cause corruption.  Verify using kselftest that
it works.  I have also verified with tracing that such optimization does
not happen due to this check in can_align_down():

if (!for_stack && vma->vm_start != addr_to_align)
	return false;

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Joel Fernandes (Google) <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Lokesh Gidra <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions