mm: use VM_BUG_ON_MM where possible

Dump the contents of the relevant struct_mm when we hit the bug condition.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc kernel/fork.c
Simple merge

diff --cc kernel/sys.c
Simple merge

diff --cc mm/huge_memory.c
Simple merge

diff --cc mm/mlock.c
Simple merge

diff --cc mm/mmap.c
Simple merge

diff --cc mm/pagewalk.c
Simple merge