mm: add folio_alloc_mpol()

Patch series "mm: convert to folio_alloc_mpol()".


This patch (of 4):

This adds a new folio_alloc_mpol() like folio_alloc() but allocate folio
according to NUMA mempolicy.

Link: https://lkml.kernel.org/r/20240515070709.78529-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20240515070709.78529-2-wangkefeng.wang@huawei.comSigned-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/gfp.h

@@ -303,6 +303,8 @@ struct page *alloc_pages_noprof(gfp_t gfp, unsigned int order);
 struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order,
 		struct mempolicy *mpol, pgoff_t ilx, int nid);
 struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order);
+struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order,
+		struct mempolicy *mpol, pgoff_t ilx, int nid);
 struct folio *vma_alloc_folio_noprof(gfp_t gfp, int order, struct vm_area_struct *vma,
 		unsigned long addr, bool hugepage);
 #else
@@ -319,6 +321,11 @@ static inline struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order)
 {
 	return __folio_alloc_node(gfp, order, numa_node_id());
 }
+static inline struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order,
+		struct mempolicy *mpol, pgoff_t ilx, int nid)
+{
+	return folio_alloc_noprof(gfp, order);
+}
 #define vma_alloc_folio_noprof(gfp, order, vma, addr, hugepage)		\
 	folio_alloc_noprof(gfp, order)
 #endif
@@ -326,6 +333,7 @@ static inline struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order)
 #define alloc_pages(...)			alloc_hooks(alloc_pages_noprof(__VA_ARGS__))
 #define alloc_pages_mpol(...)			alloc_hooks(alloc_pages_mpol_noprof(__VA_ARGS__))
 #define folio_alloc(...)			alloc_hooks(folio_alloc_noprof(__VA_ARGS__))
+#define folio_alloc_mpol(...)			alloc_hooks(folio_alloc_mpol_noprof(__VA_ARGS__))
 #define vma_alloc_folio(...)			alloc_hooks(vma_alloc_folio_noprof(__VA_ARGS__))
 
 #define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0)

mm/mempolicy.c

@@ -2277,6 +2277,13 @@ struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order,
 	return page;
 }
 
+struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order,
+		struct mempolicy *pol, pgoff_t ilx, int nid)
+{
+	return page_rmappable_folio(alloc_pages_mpol_noprof(gfp | __GFP_COMP,
+							order, pol, ilx, nid));
+}
+
 /**
  * vma_alloc_folio - Allocate a folio for a VMA.
  * @gfp: GFP flags.