[PATCH AUTOSEL for 4.9 146/190] mm: hwpoison: call shake_page() after try_to_unmap() for mlocked page

From: Naoya Horiguchi [ Upstream commit 286c469a988fbaf68e3a97ddf1e6c245c1446968 ] Memory error handler calls try_to_unmap() for error pages in various states. If the error page is a mlocked page, error handling could fail with "still referenced by 1 users" message.

[PATCH AUTOSEL for 4.9 146/190] mm: hwpoison: call shake_page() after try_to_unmap() for mlocked page

From: Naoya Horiguchi [ Upstream commit 286c469a988fbaf68e3a97ddf1e6c245c1446968 ] Memory error handler calls try_to_unmap() for error pages in various states. If the error page is a mlocked page, error handling could fail with "still referenced by 1 users" message. This is because the page