Re: [v6.6-stable PATCH] mm: gup: stop abusing try_grab_folio

From: Sasha Levin
Date: Wed Aug 07 2024 - 20:59:33 EST


On Tue, Aug 06, 2024 at 12:30:36PM -0700, Yang Shi wrote:
commit f442fa6141379a20b48ae3efabee827a3d260787 upstream

A kernel warning was reported when pinning folio in CMA memory when
launching SEV virtual machine. The splat looks like:

[snip]

This doesn't compile on 6.6...

mm/huge_memory.c: In function 'follow_devmap_pud':
mm/huge_memory.c:1213:8: error: implicit declaration of function 'try_grab_page'; did you mean 'try_get_page'? [-Werror=implicit-function-declaration]
1213 | ret = try_grab_page(page, flags);
| ^~~~~~~~~~~~~
| try_get_page

--
Thanks,
Sasha