Re: [tip: x86/shstk] mm: Don't allow write GUPs to shadow stack memory

[Ingo Molnar]

* tip-bot2 for Rick Edgecombe <tip-bot2@xxxxxxxxxxxxx> wrote:

> The following commit has been merged into the x86/shstk branch of tip:
> 
> Commit-ID:     7c8f82db8acb9f0935703c0d96cda552bbf91ff2
> Gitweb:        https://git.kernel.org/tip/7c8f82db8acb9f0935703c0d96cda552bbf91ff2
> Author:        Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
> AuthorDate:    Mon, 12 Jun 2023 17:10:48 -07:00
> Committer:     Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
> CommitterDate: Tue, 11 Jul 2023 14:12:47 -07:00
> 
> mm: Don't allow write GUPs to shadow stack memory

JFYI, this commit was the last user of writable_file_mapping_allowed(), 
which breaks the x86-defconfig build:

  mm/gup.c:1015:13: error: ‘writable_file_mapping_allowed’ defined but not used [-Werror=unused-function]

There's also a now orphan reference to writable_file_mapping_allowed() in 
the comment of folio_fast_pin_allowed().

Thanks,

	Ingo