mm/mempolicy: rename alloc_pages_current to alloc_pages

When CONFIG_NUMA is enabled, alloc_pages() is a wrapper around
alloc_pages_current().  This is pointless, just implement alloc_pages()
directly.

Link: https://lkml.kernel.org/r/20210225150642.2582252-5-willy@infradead.orgSigned-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/gfp.h

@@ -546,13 +546,7 @@ static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask,
 }
 
 #ifdef CONFIG_NUMA
-extern struct page *alloc_pages_current(gfp_t gfp_mask, unsigned order);
-
-static inline struct page *
-alloc_pages(gfp_t gfp_mask, unsigned int order)
-{
-	return alloc_pages_current(gfp_mask, order);
-}
+struct page *alloc_pages(gfp_t gfp, unsigned int order);
 extern struct page *alloc_pages_vma(gfp_t gfp_mask, int order,
 			struct vm_area_struct *vma, unsigned long addr,
 			int node, bool hugepage);

mm/mempolicy.c

@@ -2245,7 +2245,7 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
 EXPORT_SYMBOL(alloc_pages_vma);
 
 /**
- * 	alloc_pages_current - Allocate pages.
+ * 	alloc_pages - Allocate pages.
  *
  *	@gfp:
  *		%GFP_USER   user allocation,
@@ -2259,7 +2259,7 @@ EXPORT_SYMBOL(alloc_pages_vma);
  *	interrupt context and apply the current process NUMA policy.
  *	Returns NULL when no page can be allocated.
  */
-struct page *alloc_pages_current(gfp_t gfp, unsigned order)
+struct page *alloc_pages(gfp_t gfp, unsigned order)
 {
 	struct mempolicy *pol = &default_policy;
 	struct page *page;
@@ -2280,7 +2280,7 @@ struct page *alloc_pages_current(gfp_t gfp, unsigned order)
 
 	return page;
 }
-EXPORT_SYMBOL(alloc_pages_current);
+EXPORT_SYMBOL(alloc_pages);
 
 int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
 {