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authorChristoph Hellwig <hch@lst.de>2020-10-17 16:15:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-18 09:27:10 -0700
commitf255935b976729dbd8ddd079b96ddb6ecb1895bc (patch)
treed1c509277bc371630291d40f9423a5fd260fd810 /mm
parent301fa9f2ddf7fb248c188af292c9cc04f8283dff (diff)
mm: cleanup the gfp_mask handling in __vmalloc_area_node
Patch series "two small vmalloc cleanups". This patch (of 2): __vmalloc_area_node currently has four different gfp_t variables to just express this simple logic: - use the passed in mask, plus __GFP_NOWARN and __GFP_HIGHMEM (if suitable) for the underlying page allocation - use just the reclaim flags from the passed in mask plus __GFP_ZERO for allocating the page array Simplify this down to just use the pre-existing nested_gfp as-is for the page array allocation, and just the passed in gfp_mask for the page allocation, after conditionally ORing __GFP_HIGHMEM into it. This also makes the allocation warning a little more correct. Also initialize two variables at the time of declaration while touching this area. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Link: https://lkml.kernel.org/r/20201002124035.1539300-1-hch@lst.de Link: https://lkml.kernel.org/r/20201002124035.1539300-2-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmalloc.c22
1 files changed, 10 insertions, 12 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 5c61bf85edb1..acd11d3b8667 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2461,21 +2461,19 @@ EXPORT_SYMBOL_GPL(vmap_pfn);
static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot, int node)
{
- struct page **pages;
- unsigned int nr_pages, array_size, i;
const gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO;
- const gfp_t alloc_mask = gfp_mask | __GFP_NOWARN;
- const gfp_t highmem_mask = (gfp_mask & (GFP_DMA | GFP_DMA32)) ?
- 0 :
- __GFP_HIGHMEM;
+ unsigned int nr_pages = get_vm_area_size(area) >> PAGE_SHIFT;
+ unsigned int array_size = nr_pages * sizeof(struct page *), i;
+ struct page **pages;
- nr_pages = get_vm_area_size(area) >> PAGE_SHIFT;
- array_size = (nr_pages * sizeof(struct page *));
+ gfp_mask |= __GFP_NOWARN;
+ if (!(gfp_mask & (GFP_DMA | GFP_DMA32)))
+ gfp_mask |= __GFP_HIGHMEM;
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
- pages = __vmalloc_node(array_size, 1, nested_gfp|highmem_mask,
- node, area->caller);
+ pages = __vmalloc_node(array_size, 1, nested_gfp, node,
+ area->caller);
} else {
pages = kmalloc_node(array_size, nested_gfp, node);
}
@@ -2493,9 +2491,9 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
struct page *page;
if (node == NUMA_NO_NODE)
- page = alloc_page(alloc_mask|highmem_mask);
+ page = alloc_page(gfp_mask);
else
- page = alloc_pages_node(node, alloc_mask|highmem_mask, 0);
+ page = alloc_pages_node(node, gfp_mask, 0);
if (unlikely(!page)) {
/* Successfully allocated i pages, free them in __vfree() */