incoming

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

3 fixes, based on 7d762d69145a54d169f58e56d6dac57a5508debc:

Subject: checkpatch: don't interpret stack dumps as commit IDs
Subject: kasan: turn off asan-stack for clang-8 and earlier
Subject: hugetlbfs: fix races and page leaks during migration