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[2003:d8:2f2d:2400:4052:3b5:fff9:4ed0]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-3a568b48564sm17230726f8f.82.2025.06.18.10.41.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Jun 2025 10:41:27 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-doc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux.dev, linux-fsdevel@vger.kernel.org, David Hildenbrand , Andrew Morton , Jonathan Corbet , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Jerrin Shaji George , Arnd Bergmann , Greg Kroah-Hartman , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Alexander Viro , Christian Brauner , Jan Kara , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , "Matthew Wilcox (Oracle)" , Minchan Kim , Sergey Senozhatsky , Brendan Jackman , Johannes Weiner , Jason Gunthorpe , John Hubbard , Peter Xu , Xu Xin , Chengming Zhou , Miaohe Lin , Naoya Horiguchi , Oscar Salvador , Rik van Riel , Harry Yoo , Qi Zheng , Shakeel Butt Subject: [PATCH RFC 26/29] mm: rename PAGE_MAPPING_* to FOLIO_MAPPING_* Date: Wed, 18 Jun 2025 19:40:09 +0200 Message-ID: <20250618174014.1168640-27-david@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250618174014.1168640-1-david@redhat.com> References: <20250618174014.1168640-1-david@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Now that the mapping flags are only used for folios, let's rename the defines. Signed-off-by: David Hildenbrand Reviewed-by: Zi Yan --- fs/proc/page.c | 4 ++-- include/linux/fs.h | 2 +- include/linux/mm_types.h | 1 - include/linux/page-flags.h | 20 ++++++++++---------- include/linux/pagemap.h | 2 +- mm/gup.c | 4 ++-- mm/internal.h | 2 +- mm/ksm.c | 4 ++-- mm/rmap.c | 16 ++++++++-------- mm/util.c | 6 +++--- 10 files changed, 30 insertions(+), 31 deletions(-) diff --git a/fs/proc/page.c b/fs/proc/page.c index 999af26c72985..0cdc78c0d23fa 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -149,7 +149,7 @@ u64 stable_page_flags(const struct page *page) =20 k =3D folio->flags; mapping =3D (unsigned long)folio->mapping; - is_anon =3D mapping & PAGE_MAPPING_ANON; + is_anon =3D mapping & FOLIO_MAPPING_ANON; =20 /* * pseudo flags for the well known (anonymous) memory mapped pages @@ -158,7 +158,7 @@ u64 stable_page_flags(const struct page *page) u |=3D 1 << KPF_MMAP; if (is_anon) { u |=3D 1 << KPF_ANON; - if (mapping & PAGE_MAPPING_KSM) + if (mapping & FOLIO_MAPPING_KSM) u |=3D 1 << KPF_KSM; } =20 diff --git a/include/linux/fs.h b/include/linux/fs.h index 93ee0d2d6f1ad..f00a073c35c45 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -524,7 +524,7 @@ struct address_space { /* * On most architectures that alignment is already the case; but * must be enforced here for CRIS, to let the least significant bit - * of struct page's "mapping" pointer be used for PAGE_MAPPING_ANON. + * of struct folio's "mapping" pointer be used for FOLIO_MAPPING_ANON. */ =20 /* XArray tags, for tagging dirty and writeback pages in the pagecache. */ diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index d6b91e8a66d6d..f139f47696f63 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -105,7 +105,6 @@ struct page { unsigned int order; }; }; - /* See page-flags.h for PAGE_MAPPING_FLAGS */ struct address_space *mapping; union { pgoff_t __folio_index; /* Our offset within mapping. */ diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index b42986a578b71..23b1e458dfeda 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -695,10 +695,10 @@ PAGEFLAG_FALSE(VmemmapSelfHosted, vmemmap_self_hosted) /* * On an anonymous folio mapped into a user virtual memory area, * folio->mapping points to its anon_vma, not to a struct address_space; - * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h. + * with the FOLIO_MAPPING_ANON bit set to distinguish it. See rmap.h. * * On an anonymous folio in a VM_MERGEABLE area, if CONFIG_KSM is enabled, - * the PAGE_MAPPING_ANON_KSM bit may be set along with the PAGE_MAPPING_AN= ON + * the FOLIO_MAPPING_ANON_KSM bit may be set along with the FOLIO_MAPPING_= ANON * bit; and then folio->mapping points, not to an anon_vma, but to a priva= te * structure which KSM associates with that merged folio. See ksm.h. * @@ -713,21 +713,21 @@ PAGEFLAG_FALSE(VmemmapSelfHosted, vmemmap_self_hosted) * false before calling the following functions (e.g., folio_test_anon). * See mm/slab.h. */ -#define PAGE_MAPPING_ANON 0x1 -#define PAGE_MAPPING_ANON_KSM 0x2 -#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_ANON_KSM) -#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_ANON_KSM) +#define FOLIO_MAPPING_ANON 0x1 +#define FOLIO_MAPPING_ANON_KSM 0x2 +#define FOLIO_MAPPING_KSM (FOLIO_MAPPING_ANON | FOLIO_MAPPING_ANON_KSM) +#define FOLIO_MAPPING_FLAGS (FOLIO_MAPPING_ANON | FOLIO_MAPPING_ANON_KSM) =20 static __always_inline bool folio_test_anon(const struct folio *folio) { - return ((unsigned long)folio->mapping & PAGE_MAPPING_ANON) !=3D 0; + return ((unsigned long)folio->mapping & FOLIO_MAPPING_ANON) !=3D 0; } =20 static __always_inline bool PageAnonNotKsm(const struct page *page) { unsigned long flags =3D (unsigned long)page_folio(page)->mapping; =20 - return (flags & PAGE_MAPPING_FLAGS) =3D=3D PAGE_MAPPING_ANON; + return (flags & FOLIO_MAPPING_FLAGS) =3D=3D FOLIO_MAPPING_ANON; } =20 static __always_inline bool PageAnon(const struct page *page) @@ -743,8 +743,8 @@ static __always_inline bool PageAnon(const struct page = *page) */ static __always_inline bool folio_test_ksm(const struct folio *folio) { - return ((unsigned long)folio->mapping & PAGE_MAPPING_FLAGS) =3D=3D - PAGE_MAPPING_KSM; + return ((unsigned long)folio->mapping & FOLIO_MAPPING_FLAGS) =3D=3D + FOLIO_MAPPING_KSM; } #else FOLIO_TEST_FLAG_FALSE(ksm) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index e63fbfbd5b0f3..10a222e68b851 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -502,7 +502,7 @@ static inline pgoff_t mapping_align_index(struct addres= s_space *mapping, static inline bool mapping_large_folio_support(struct address_space *mappi= ng) { /* AS_FOLIO_ORDER is only reasonable for pagecache folios */ - VM_WARN_ONCE((unsigned long)mapping & PAGE_MAPPING_ANON, + VM_WARN_ONCE((unsigned long)mapping & FOLIO_MAPPING_ANON, "Anonymous mapping always supports large folio"); =20 return mapping_max_folio_order(mapping) > 0; diff --git a/mm/gup.c b/mm/gup.c index 6888e871a74a9..76ef1839a126a 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2804,9 +2804,9 @@ static bool gup_fast_folio_allowed(struct folio *foli= o, unsigned int flags) return false; =20 /* Anonymous folios pose no problem. */ - mapping_flags =3D (unsigned long)mapping & PAGE_MAPPING_FLAGS; + mapping_flags =3D (unsigned long)mapping & FOLIO_MAPPING_FLAGS; if (mapping_flags) - return mapping_flags & PAGE_MAPPING_ANON; + return mapping_flags & FOLIO_MAPPING_ANON; =20 /* * At this point, we know the mapping is non-null and points to an diff --git a/mm/internal.h b/mm/internal.h index feda91c9b3f4e..ef11d341e3915 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -150,7 +150,7 @@ static inline void *folio_raw_mapping(const struct foli= o *folio) { unsigned long mapping =3D (unsigned long)folio->mapping; =20 - return (void *)(mapping & ~PAGE_MAPPING_FLAGS); + return (void *)(mapping & ~FOLIO_MAPPING_FLAGS); } =20 /* diff --git a/mm/ksm.c b/mm/ksm.c index 18b3690bb69ad..660a94964438f 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -893,7 +893,7 @@ static struct folio *ksm_get_folio(struct ksm_stable_no= de *stable_node, unsigned long kpfn; =20 expected_mapping =3D (void *)((unsigned long)stable_node | - PAGE_MAPPING_KSM); + FOLIO_MAPPING_KSM); again: kpfn =3D READ_ONCE(stable_node->kpfn); /* Address dependency. */ folio =3D pfn_folio(kpfn); @@ -1070,7 +1070,7 @@ static inline void folio_set_stable_node(struct folio= *folio, struct ksm_stable_node *stable_node) { VM_WARN_ON_FOLIO(folio_test_anon(folio) && PageAnonExclusive(&folio->page= ), folio); - folio->mapping =3D (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM= ); + folio->mapping =3D (void *)((unsigned long)stable_node | FOLIO_MAPPING_KS= M); } =20 #ifdef CONFIG_SYSFS diff --git a/mm/rmap.c b/mm/rmap.c index fd160ddaa9807..c8610ea772683 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -503,12 +503,12 @@ struct anon_vma *folio_get_anon_vma(const struct foli= o *folio) =20 rcu_read_lock(); anon_mapping =3D (unsigned long)READ_ONCE(folio->mapping); - if ((anon_mapping & PAGE_MAPPING_FLAGS) !=3D PAGE_MAPPING_ANON) + if ((anon_mapping & FOLIO_MAPPING_FLAGS) !=3D FOLIO_MAPPING_ANON) goto out; if (!folio_mapped(folio)) goto out; =20 - anon_vma =3D (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON); + anon_vma =3D (struct anon_vma *) (anon_mapping - FOLIO_MAPPING_ANON); if (!atomic_inc_not_zero(&anon_vma->refcount)) { anon_vma =3D NULL; goto out; @@ -550,12 +550,12 @@ struct anon_vma *folio_lock_anon_vma_read(const struc= t folio *folio, retry: rcu_read_lock(); anon_mapping =3D (unsigned long)READ_ONCE(folio->mapping); - if ((anon_mapping & PAGE_MAPPING_FLAGS) !=3D PAGE_MAPPING_ANON) + if ((anon_mapping & FOLIO_MAPPING_FLAGS) !=3D FOLIO_MAPPING_ANON) goto out; if (!folio_mapped(folio)) goto out; =20 - anon_vma =3D (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON); + anon_vma =3D (struct anon_vma *) (anon_mapping - FOLIO_MAPPING_ANON); root_anon_vma =3D READ_ONCE(anon_vma->root); if (down_read_trylock(&root_anon_vma->rwsem)) { /* @@ -1334,9 +1334,9 @@ void folio_move_anon_rmap(struct folio *folio, struct= vm_area_struct *vma) VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio); VM_BUG_ON_VMA(!anon_vma, vma); =20 - anon_vma +=3D PAGE_MAPPING_ANON; + anon_vma +=3D FOLIO_MAPPING_ANON; /* - * Ensure that anon_vma and the PAGE_MAPPING_ANON bit are written + * Ensure that anon_vma and the FOLIO_MAPPING_ANON bit are written * simultaneously, so a concurrent reader (eg folio_referenced()'s * folio_test_anon()) will not see one without the other. */ @@ -1367,10 +1367,10 @@ static void __folio_set_anon(struct folio *folio, s= truct vm_area_struct *vma, /* * page_idle does a lockless/optimistic rmap scan on folio->mapping. * Make sure the compiler doesn't split the stores of anon_vma and - * the PAGE_MAPPING_ANON type identifier, otherwise the rmap code + * the FOLIO_MAPPING_ANON type identifier, otherwise the rmap code * could mistake the mapping for a struct address_space and crash. */ - anon_vma =3D (void *) anon_vma + PAGE_MAPPING_ANON; + anon_vma =3D (void *) anon_vma + FOLIO_MAPPING_ANON; WRITE_ONCE(folio->mapping, (struct address_space *) anon_vma); folio->index =3D linear_page_index(vma, address); } diff --git a/mm/util.c b/mm/util.c index 0b270c43d7d12..20bbfe4ce1b8b 100644 --- a/mm/util.c +++ b/mm/util.c @@ -670,9 +670,9 @@ struct anon_vma *folio_anon_vma(const struct folio *fol= io) { unsigned long mapping =3D (unsigned long)folio->mapping; =20 - if ((mapping & PAGE_MAPPING_FLAGS) !=3D PAGE_MAPPING_ANON) + if ((mapping & FOLIO_MAPPING_FLAGS) !=3D FOLIO_MAPPING_ANON) return NULL; - return (void *)(mapping - PAGE_MAPPING_ANON); + return (void *)(mapping - FOLIO_MAPPING_ANON); } =20 /** @@ -699,7 +699,7 @@ struct address_space *folio_mapping(struct folio *folio) return swap_address_space(folio->swap); =20 mapping =3D folio->mapping; - if ((unsigned long)mapping & PAGE_MAPPING_FLAGS) + if ((unsigned long)mapping & FOLIO_MAPPING_FLAGS) return NULL; =20 return mapping; --=20 2.49.0