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[v4,01/32] mm: add virt_to_folio() and folio_address()

Message ID	20220104001046.12263-2-vbabka@suse.cz (mailing list archive)
State	New
Headers	show Return-Path: <owner-linux-mm@kvack.org> From: Vlastimil Babka <vbabka@suse.cz> To: Matthew Wilcox <willy@infradead.org>, Christoph Lameter <cl@linux.com>, David Rientjes <rientjes@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Pekka Enberg <penberg@kernel.org> Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Johannes Weiner <hannes@cmpxchg.org>, Roman Gushchin <guro@fb.com>, Hyeonggon Yoo <42.hyeyoo@gmail.com>, patches@lists.linux.dev, Vlastimil Babka <vbabka@suse.cz> Subject: [PATCH v4 01/32] mm: add virt_to_folio() and folio_address() Date: Tue, 4 Jan 2022 01:10:15 +0100 Message-Id: <20220104001046.12263-2-vbabka@suse.cz> In-Reply-To: <20220104001046.12263-1-vbabka@suse.cz> References: <20220104001046.12263-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	Separate struct slab from struct page \| expand [v4,00/32] Separate struct slab from struct page [v4,01/32] mm: add virt_to_folio() and folio_address() [v4,02/32] mm/slab: Dissolve slab_map_pages() in its caller [v4,03/32] mm/slub: Make object_err() static [v4,04/32] mm: Split slab into its own type [v4,05/32] mm: Convert [un]account_slab_page() to struct slab [v4,06/32] mm: Convert virt_to_cache() to use struct slab [v4,07/32] mm: Convert __ksize() to struct slab [v4,08/32] mm: Use struct slab in kmem_obj_info() [v4,09/32] mm: Convert check_heap_object() to use struct slab [v4,10/32] mm/slub: Convert detached_freelist to use a struct slab [v4,11/32] mm/slub: Convert kfree() to use a struct slab [v4,12/32] mm/slub: Convert __slab_lock() and __slab_unlock() to struct slab [v4,13/32] mm/slub: Convert print_page_info() to print_slab_info() [v4,14/32] mm/slub: Convert alloc_slab_page() to return a struct slab [v4,15/32] mm/slub: Convert __free_slab() to use struct slab [v4,16/32] mm/slub: Convert pfmemalloc_match() to take a struct slab [v4,17/32] mm/slub: Convert most struct page to struct slab by spatch [v4,18/32] mm/slub: Finish struct page to struct slab conversion [v4,19/32] mm/slab: Convert kmem_getpages() and kmem_freepages() to struct slab [v4,20/32] mm/slab: Convert most struct page to struct slab by spatch [v4,21/32] mm/slab: Finish struct page to struct slab conversion [v4,22/32] mm: Convert struct page to struct slab in functions used by other subsystems [v4,23/32] mm/memcg: Convert slab objcgs from struct page to struct slab [v4,24/32] mm/slob: Convert SLOB to use struct slab and struct folio [v4,25/32] mm/kasan: Convert to struct folio and struct slab [v4,26/32] mm/kfence: Convert kfence_guarded_alloc() to struct slab [v4,27/32] mm/slb: Differentiate struct slab fields by slb implementations [v4,28/32] mm/slub: Simplify struct slab slabs field definition [v4,29/32] mm/slub: Define struct slab fields for CONFIG_SLUB_CPU_PARTIAL only when enabled [v4,30/32] zsmalloc: Stop using slab fields in struct page [v4,31/32] bootmem: Use page->index instead of page->freelist [v4,32/32] mm/slob: Remove unnecessary page_mapcount_reset() function call

Commit Message

Vlastimil Babka Jan. 4, 2022, 12:10 a.m. UTC

These two wrappers around their respective struct page variants will be
useful in the following patches.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <guro@fb.com>
---
 include/linux/mm.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff mbox series

Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index a7e4a9e7d807..4a6cf22483da 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -863,6 +863,13 @@  static inline struct page *virt_to_head_page(const void *x)
 	return compound_head(page);
 }
 
+static inline struct folio *virt_to_folio(const void *x)
+{
+	struct page *page = virt_to_page(x);
+
+	return page_folio(page);
+}
+
 void __put_page(struct page *page);
 
 void put_pages_list(struct list_head *pages);
@@ -1753,6 +1760,11 @@  void page_address_init(void);
 #define page_address_init()  do { } while(0)
 #endif
 
+static inline void *folio_address(const struct folio *folio)
+{
+	return page_address(&folio->page);
+}
+
 extern void *page_rmapping(struct page *page);
 extern struct anon_vma *page_anon_vma(struct page *page);
 extern pgoff_t __page_file_index(struct page *page);