Replace alloc_zeroed_user_highpage_movable(). The main difference is
returning a folio containing a single page instead of returning the
page, but take the opportunity to rename the function to match other
allocation functions a little better and rewrite the documentation
to place more emphasis on the zeroing rather than the highmem aspect.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
arch/alpha/include/asm/page.h | 5 ++---
arch/arm64/include/asm/page.h | 4 ++--
arch/arm64/mm/fault.c | 4 ++--
arch/ia64/include/asm/page.h | 14 ++++++--------
arch/m68k/include/asm/page_no.h | 5 ++---
arch/s390/include/asm/page.h | 5 ++---
arch/x86/include/asm/page.h | 5 ++---
include/linux/highmem.h | 33 ++++++++++++++++-----------------
mm/memory.c | 16 ++++++++++------
9 files changed, 44 insertions(+), 47 deletions(-)
diff --git a/arch/alpha/include/asm/page.h b/arch/alpha/include/asm/page.h
index 8f3f5eecba28..bc5256fba8f0 100644
--- a/arch/alpha/include/asm/page.h
+++ b/arch/alpha/include/asm/page.h
@@ -17,9 +17,8 @@
extern void clear_page(void *page);
#define clear_user_page(page, vaddr, pg) clear_page(page)
-#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
- alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
+ vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
extern void copy_page(void * _to, void * _from);
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h
index 993a27ea6f54..2312e6ee595f 100644
--- a/arch/arm64/include/asm/page.h
+++ b/arch/arm64/include/asm/page.h
@@ -29,9 +29,9 @@ void copy_user_highpage(struct page *to, struct page *from,
void copy_highpage(struct page *to, struct page *from);
#define __HAVE_ARCH_COPY_HIGHPAGE
-struct page *alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma,
+struct folio *vma_alloc_zeroed_movable_folio(struct vm_area_struct *vma,
unsigned long vaddr);
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#define vma_alloc_zeroed_movable_folio vma_alloc_zeroed_movable_folio
void tag_clear_highpage(struct page *to);
#define __HAVE_ARCH_TAG_CLEAR_HIGHPAGE
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 596f46dabe4e..f4cb0f85ccf4 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -925,7 +925,7 @@ NOKPROBE_SYMBOL(do_debug_exception);
/*
* Used during anonymous page fault handling.
*/
-struct page *alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma,
+struct folio *vma_alloc_zeroed_movable_folio(struct vm_area_struct *vma,
unsigned long vaddr)
{
gfp_t flags = GFP_HIGHUSER_MOVABLE | __GFP_ZERO;
@@ -938,7 +938,7 @@ struct page *alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma,
if (vma->vm_flags & VM_MTE)
flags |= __GFP_ZEROTAGS;
- return alloc_page_vma(flags, vma, vaddr);
+ return vma_alloc_folio(flags, 0, vma, vaddr, false);
}
void tag_clear_highpage(struct page *page)
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index 1b990466d540..ba0b365cf2b2 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -82,17 +82,15 @@ do { \
} while (0)
-#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
+#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
({ \
- struct page *page = alloc_page_vma( \
- GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr); \
- if (page) \
- flush_dcache_page(page); \
- page; \
+ struct folio *folio = vma_alloc_folio( \
+ GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false); \
+ if (folio) \
+ flush_dcache_folio(folio); \
+ folio; \
})
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
-
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#include <asm-generic/memory_model.h>
diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_no.h
index c9d0d84158a4..abd2c3aeb015 100644
--- a/arch/m68k/include/asm/page_no.h
+++ b/arch/m68k/include/asm/page_no.h
@@ -13,9 +13,8 @@ extern unsigned long memory_end;
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
-#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
- alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
+ vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
#define __pa(vaddr) ((unsigned long)(vaddr))
#define __va(paddr) ((void *)((unsigned long)(paddr)))
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 61dea67bb9c7..8a2a3b5d1e29 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -73,9 +73,8 @@ static inline void copy_page(void *to, void *from)
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
-#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
- alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
+ vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
/*
* These are used to make use of C type-checking..
diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
index 9cc82f305f4b..d18e5c332cb9 100644
--- a/arch/x86/include/asm/page.h
+++ b/arch/x86/include/asm/page.h
@@ -34,9 +34,8 @@ static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
copy_page(to, from);
}
-#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
- alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#define vma_alloc_zeroed_movable_folio(vma, vaddr) \
+ vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
#ifndef __pa
#define __pa(x) __phys_addr((unsigned long)(x))
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 56703082f803..9fa462561e05 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -208,31 +208,30 @@ static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
}
#endif
-#ifndef __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+#ifndef vma_alloc_zeroed_movable_folio
/**
- * alloc_zeroed_user_highpage_movable - Allocate a zeroed HIGHMEM page for a VMA that the caller knows can move
- * @vma: The VMA the page is to be allocated for
- * @vaddr: The virtual address the page will be inserted into
+ * vma_alloc_zeroed_movable_folio - Allocate a zeroed page for a VMA.
+ * @vma: The VMA the page is to be allocated for.
+ * @vaddr: The virtual address the page will be inserted into.
*
- * Returns: The allocated and zeroed HIGHMEM page
+ * This function will allocate a page suitable for inserting into this
+ * VMA at this virtual address. It may be allocated from highmem or
+ * the movable zone. An architecture may provide its own implementation.
*
- * This function will allocate a page for a VMA that the caller knows will
- * be able to migrate in the future using move_pages() or reclaimed
- *
- * An architecture may override this function by defining
- * __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE and providing their own
- * implementation.
+ * Return: A folio containing one allocated and zeroed page or NULL if
+ * we are out of memory.
*/
-static inline struct page *
-alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma,
+static inline
+struct folio *vma_alloc_zeroed_movable_folio(struct vm_area_struct *vma,
unsigned long vaddr)
{
- struct page *page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vaddr);
+ struct folio *folio;
- if (page)
- clear_user_highpage(page, vaddr);
+ folio = vma_alloc_folio(GFP_HIGHUSER_MOVABLE, 0, vma, vaddr, false);
+ if (folio)
+ clear_user_highpage(&folio->page, vaddr);
- return page;
+ return folio;
}
#endif
diff --git a/mm/memory.c b/mm/memory.c
index f7613650efd4..4cb2cd809b18 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3056,10 +3056,12 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
goto oom;
if (is_zero_pfn(pte_pfn(vmf->orig_pte))) {
- new_page = alloc_zeroed_user_highpage_movable(vma,
- vmf->address);
- if (!new_page)
+ struct folio *new_folio;
+
+ new_folio = vma_alloc_zeroed_movable_folio(vma, vmf->address);
+ if (!new_folio)
goto oom;
+ new_page = &new_folio->page;
} else {
new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma,
vmf->address);
@@ -3998,6 +4000,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct page *page;
+ struct folio *folio;
vm_fault_t ret = 0;
pte_t entry;
@@ -4047,11 +4050,12 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
/* Allocate our own private page. */
if (unlikely(anon_vma_prepare(vma)))
goto oom;
- page = alloc_zeroed_user_highpage_movable(vma, vmf->address);
- if (!page)
+ folio = vma_alloc_zeroed_movable_folio(vma, vmf->address);
+ if (!folio)
goto oom;
- if (mem_cgroup_charge(page_folio(page), vma->vm_mm, GFP_KERNEL))
+ page = &folio->page;
+ if (mem_cgroup_charge(folio, vma->vm_mm, GFP_KERNEL))
goto oom_free_page;
cgroup_throttle_swaprate(page, GFP_KERNEL);
--
2.35.1
