Re: [PATCH RFC 10/14] mm/page-flags: introduce folio_test_fs_private()

On Fri Jul 31, 2026 at 10:13 PM EDT, Zi Yan wrote:
> folio_test_fs_private() wraps folio->private != NULL check and excludes
> swapcache and hugetlb folios, since swapcache uses swp_entry_t overlapping
> with folio->private and hugetlb sets its own flags in folio->private.
> Replace open code with the helper, since core MM does this check
> frequently.
>
> No functional change intended.
>
> Assisted-by: Claude:claude-opus-4-8
> Assisted-by: Codex:gpt-5
> Signed-off-by: Zi Yan <[email protected]>
> To: Andrew Morton <[email protected]>
> To: David Hildenbrand <[email protected]>
> To: Steven Rostedt <[email protected]>
> To: Masami Hiramatsu <[email protected]>
> To: Lorenzo Stoakes <[email protected]>
> Cc: "Liam R. Howlett" <[email protected]>
> Cc: Vlastimil Babka <[email protected]>
> Cc: Mike Rapoport <[email protected]>
> Cc: Suren Baghdasaryan <[email protected]>
> Cc: Michal Hocko <[email protected]>
> Cc: Mathieu Desnoyers <[email protected]>
> Cc: Zi Yan <[email protected]>
> Cc: Baolin Wang <[email protected]>
> Cc: Nico Pache <[email protected]>
> Cc: Ryan Roberts <[email protected]>
> Cc: Dev Jain <[email protected]>
> Cc: Barry Song <[email protected]>
> Cc: Lance Yang <[email protected]>
> Cc: Usama Arif <[email protected]>
> Cc: Matthew Brost <[email protected]>
> Cc: Joshua Hahn <[email protected]>
> Cc: Rakie Kim <[email protected]>
> Cc: Byungchul Park <[email protected]>
> Cc: Gregory Price <[email protected]>
> Cc: Ying Huang <[email protected]>
> Cc: Alistair Popple <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> Cc: [email protected]
> ---
>  fs/proc/page.c                 |  3 +--
>  include/linux/mm.h             |  3 +--
>  include/linux/page-flags.h     | 21 ++++++++++++++++++---
>  include/trace/events/pagemap.h |  4 +---
>  mm/huge_memory.c               |  4 +---
>  mm/migrate.c                   |  3 +--
>  6 files changed, 23 insertions(+), 15 deletions(-)
>

Sashiko pointed out that I missed a couple of open coded checks. I will
replace them with folio_test_fs_private() in v2.


-- 
Best Regards,
Yan, Zi