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mm: Add vma_alloc_folio()

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This wrapper around alloc_pages_vma() calls prep_transhuge_page(),
removing the obligation from the caller.  This is in the same spirit
as __folio_alloc().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-04-04 15:11:04 -04:00
parent c185e494ae
commit f584b68005
2 changed files with 19 additions and 2 deletions
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8
include/linux/gfp.h
View File

@ -613,9 +613,11 @@ static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask,
#ifdef CONFIG_NUMA
struct page *alloc_pages(gfp_t gfp, unsigned int order);
struct folio *folio_alloc(gfp_t gfp, unsigned order);
extern struct page *alloc_pages_vma(gfp_t gfp_mask, int order,
struct page *alloc_pages_vma(gfp_t gfp_mask, int order,
struct vm_area_struct *vma, unsigned long addr,
bool hugepage);
struct folio *vma_alloc_folio(gfp_t gfp, int order, struct vm_area_struct *vma,
unsigned long addr, bool hugepage);
#define alloc_hugepage_vma(gfp_mask, vma, addr, order) \
alloc_pages_vma(gfp_mask, order, vma, addr, true)
#else
@ -627,8 +629,10 @@ static inline struct folio *folio_alloc(gfp_t gfp, unsigned int order)
{
return __folio_alloc_node(gfp, order, numa_node_id());
}
#define alloc_pages_vma(gfp_mask, order, vma, addr, false)\
#define alloc_pages_vma(gfp_mask, order, vma, addr, hugepage) \
alloc_pages(gfp_mask, order)
#define vma_alloc_folio(gfp, order, vma, addr, hugepage) \
folio_alloc(gfp, order)
#define alloc_hugepage_vma(gfp_mask, vma, addr, order) \
alloc_pages(gfp_mask, order)
#endif

13
mm/mempolicy.c
View File

@ -2227,6 +2227,19 @@ out:
}
EXPORT_SYMBOL(alloc_pages_vma);
struct folio *vma_alloc_folio(gfp_t gfp, int order, struct vm_area_struct *vma,
unsigned long addr, bool hugepage)
{
struct folio *folio;
folio = (struct folio *)alloc_pages_vma(gfp, order, vma, addr,
hugepage);
if (folio && order > 1)
prep_transhuge_page(&folio->page);
return folio;
}
/**
* alloc_pages - Allocate pages.
* @gfp: GFP flags.