diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2025-09-08 18:11:00 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-09-21 14:22:26 -0700 |
| commit | 522abd92279a8ea55bcc687f77697d4c0aaba6c0 (patch) | |
| tree | 81608c27511b211a40c9fec803d34aa7f3c40473 | |
| parent | 6106864b878e1ce5ecab4b8ffffff85e9ec69b78 (diff) | |
ptdesc: convert __page_flags to pt_flags
Patch series "Some ptdesc cleanups".
The first two patches here are preparation for splitting struct ptdesc
from struct page and struct folio. I think their only dependency is on
the memdesc_flags_t patches from August which is in mm-new. The third
patch is just something I noticed while working on the code.
This patch (of 3):
Use the new memdesc_flags_t type to show that these are the same bits as
page/folio/slab and thesefore have the zone/node/section information in
them. Remove a use of ptdesc_folio() by converting
pagetable_is_reserved() to use test_bit() directly.
Link: https://lkml.kernel.org/r/20250908171104.2409217-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20250908171104.2409217-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/mm.h | 7 | ||||
| -rw-r--r-- | include/linux/mm_types.h | 6 |
2 files changed, 9 insertions, 4 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index a6bfa46937a8..8dd71392eba7 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2934,6 +2934,11 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a } #endif /* CONFIG_MMU */ +enum pt_flags { + PT_reserved = PG_reserved, + /* High bits are used for zone/node/section */ +}; + static inline struct ptdesc *virt_to_ptdesc(const void *x) { return page_ptdesc(virt_to_page(x)); @@ -2951,7 +2956,7 @@ static inline void *ptdesc_address(const struct ptdesc *pt) static inline bool pagetable_is_reserved(struct ptdesc *pt) { - return folio_test_reserved(ptdesc_folio(pt)); + return test_bit(PT_reserved, &pt->pt_flags.f); } /** diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index ff2b4e13215f..f048dc80646e 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -524,7 +524,7 @@ FOLIO_MATCH(compound_head, _head_3); /** * struct ptdesc - Memory descriptor for page tables. - * @__page_flags: Same as page flags. Powerpc only. + * @pt_flags: enum pt_flags plus zone/node/section. * @pt_rcu_head: For freeing page table pages. * @pt_list: List of used page tables. Used for s390 gmap shadow pages * (which are not linked into the user page tables) and x86 @@ -546,7 +546,7 @@ FOLIO_MATCH(compound_head, _head_3); * understanding of the issues. */ struct ptdesc { - unsigned long __page_flags; + memdesc_flags_t pt_flags; union { struct rcu_head pt_rcu_head; @@ -584,7 +584,7 @@ struct ptdesc { #define TABLE_MATCH(pg, pt) \ static_assert(offsetof(struct page, pg) == offsetof(struct ptdesc, pt)) -TABLE_MATCH(flags, __page_flags); +TABLE_MATCH(flags, pt_flags); TABLE_MATCH(compound_head, pt_list); TABLE_MATCH(compound_head, _pt_pad_1); TABLE_MATCH(mapping, __page_mapping); |