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From: "Vishal Moola (Oracle)" <vishal.moola@gmail.com>
To: linux-mm@kvack.org
Cc: damon@lists.linux.dev, linux-kernel@vger.kernel.org,
	akpm@linux-foundation.org, sj@kernel.org, willy@infradead.org,
	"Vishal Moola (Oracle)" <vishal.moola@gmail.com>
Subject: [PATCH v4 1/4] mm/memory: Add vm_normal_folio()
Date: Wed, 21 Dec 2022 10:08:45 -0800	[thread overview]
Message-ID: <20221221180848.20774-2-vishal.moola@gmail.com> (raw)
In-Reply-To: <20221221180848.20774-1-vishal.moola@gmail.com>

Introduce a wrapper function called vm_normal_folio(). This function
calls vm_normal_page() and returns the folio of the page found, or null
if no page is found.

This function allows callers to get a folio from a pte, which will
eventually allow them to completely replace their struct page variables
with struct folio instead.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/mm.h |  2 ++
 mm/memory.c        | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ff46dcab2004..d29bfae4b71f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1968,6 +1968,8 @@ static inline bool can_do_mlock(void) { return false; }
 extern int user_shm_lock(size_t, struct ucounts *);
 extern void user_shm_unlock(size_t, struct ucounts *);
 
+struct folio *vm_normal_folio(struct vm_area_struct *vma, unsigned long addr,
+			     pte_t pte);
 struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr,
 			     pte_t pte);
 struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr,
diff --git a/mm/memory.c b/mm/memory.c
index 37d1763c4d47..4000e9f017e0 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -625,6 +625,16 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr,
 	return pfn_to_page(pfn);
 }
 
+struct folio *vm_normal_folio(struct vm_area_struct *vma, unsigned long addr,
+			    pte_t pte)
+{
+	struct page *page = vm_normal_page(vma, addr, pte);
+
+	if (page)
+		return page_folio(page);
+	return NULL;
+}
+
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr,
 				pmd_t pmd)
-- 
2.38.1


  reply	other threads:[~2022-12-21 18:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-21 18:08 [PATCH v4 0/4] Convert deactivate_page() to folio_deactivate() Vishal Moola (Oracle)
2022-12-21 18:08 ` Vishal Moola (Oracle) [this message]
2022-12-21 18:08 ` [PATCH v4 2/4] madvise: Convert madvise_cold_or_pageout_pte_range() to use folios Vishal Moola (Oracle)
2022-12-21 18:08 ` [PATCH v4 3/4] mm/damon: Convert damon_pa_mark_accessed_or_deactivate() " Vishal Moola (Oracle)
2022-12-21 18:08 ` [PATCH v4 4/4] mm/swap: Convert deactivate_page() to folio_deactivate() Vishal Moola (Oracle)
2022-12-23  1:04   ` Yu Zhao

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