mm/page_alloc: rename gfp_mask to gfp

Shorten some overly-long lines by renaming this identifier.

Link: https://lkml.kernel.org/r/20210225150642.2582252-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: 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>

Author: Matthew Wilcox (Oracle)

mm/page_alloc.c

@@ -5014,7 +5014,7 @@ static inline bool prepare_alloc_pages(gfp_t gfp_mask, unsigned int order,
  * This is the 'heart' of the zoned buddy allocator.
  */
 struct page *
-__alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
+__alloc_pages_nodemask(gfp_t gfp, unsigned int order, int preferred_nid,
 							nodemask_t *nodemask)
 {
 	struct page *page;
@@ -5027,21 +5027,21 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
 	 * so bail out early if the request is out of bound.
 	 */
 	if (unlikely(order >= MAX_ORDER)) {
-		WARN_ON_ONCE(!(gfp_mask & __GFP_NOWARN));
+		WARN_ON_ONCE(!(gfp & __GFP_NOWARN));
 		return NULL;
 	}
 
-	gfp_mask &= gfp_allowed_mask;
-	alloc_gfp = gfp_mask;
-	if (!prepare_alloc_pages(gfp_mask, order, preferred_nid, nodemask, &ac,
+	gfp &= gfp_allowed_mask;
+	alloc_gfp = gfp;
+	if (!prepare_alloc_pages(gfp, order, preferred_nid, nodemask, &ac,
 			&alloc_gfp, &alloc_flags))
 		return NULL;
 
 	/*
 	 * Forbid the first pass from falling back to types that fragment
 	 * memory until all local zones are considered.
 	 */
-	alloc_flags |= alloc_flags_nofragment(ac.preferred_zoneref->zone, gfp_mask);
+	alloc_flags |= alloc_flags_nofragment(ac.preferred_zoneref->zone, gfp);
 
 	/* First allocation attempt */
 	page = get_page_from_freelist(alloc_gfp, order, alloc_flags, &ac);
@@ -5054,7 +5054,7 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
 	 * from a particular context which has been marked by
 	 * memalloc_no{fs,io}_{save,restore}.
 	 */
-	alloc_gfp = current_gfp_context(gfp_mask);
+	alloc_gfp = current_gfp_context(gfp);
 	ac.spread_dirty_pages = false;
 
 	/*
@@ -5066,8 +5066,8 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
 	page = __alloc_pages_slowpath(alloc_gfp, order, &ac);
 
 out:
-	if (memcg_kmem_enabled() && (gfp_mask & __GFP_ACCOUNT) && page &&
-	    unlikely(__memcg_kmem_charge_page(page, gfp_mask, order) != 0)) {
+	if (memcg_kmem_enabled() && (gfp & __GFP_ACCOUNT) && page &&
+	    unlikely(__memcg_kmem_charge_page(page, gfp, order) != 0)) {
 		__free_pages(page, order);
 		page = NULL;
 	}