From 930f036b4ff6501b91e09bba4bf94423203dabd9 Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Wed, 6 Aug 2014 16:06:28 -0700 Subject: [PATCH] mm, vmalloc: constify allocation mask tmp_mask in the __vmalloc_area_node() iteration never changes so it can be moved into function scope and marked with const. This causes the movl and orl to only be done once per call rather than area->nr_pages times. nested_gfp can also be marked const. Signed-off-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmalloc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index a3cad905f560..9ec4173f48a8 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1566,7 +1566,8 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask, const int order = 0; struct page **pages; unsigned int nr_pages, array_size, i; - gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO; + const gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO; + const gfp_t alloc_mask = gfp_mask | __GFP_NOWARN; nr_pages = get_vm_area_size(area) >> PAGE_SHIFT; array_size = (nr_pages * sizeof(struct page *)); @@ -1589,12 +1590,11 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask, for (i = 0; i < area->nr_pages; i++) { struct page *page; - gfp_t tmp_mask = gfp_mask | __GFP_NOWARN; if (node == NUMA_NO_NODE) - page = alloc_page(tmp_mask); + page = alloc_page(alloc_mask); else - page = alloc_pages_node(node, tmp_mask, order); + page = alloc_pages_node(node, alloc_mask, order); if (unlikely(!page)) { /* Successfully allocated i pages, free them in __vunmap() */ -- 2.20.1