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mm: rename __page_frag functions to __page_frag_cache, drop order from drain

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This patch does two things.

First it goes through and renames the __page_frag prefixed functions to
__page_frag_cache so that we can be clear that we are draining or
refilling the cache, not the frags themselves.

Second we drop the order parameter from __page_frag_cache_drain since we
don't actually need to pass it since all fragments are either order 0 or
must be a compound page.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexander Duyck 2017-01-10 16:58:09 -08:00 • committed by Linus Torvalds
commit 2976db8018
3 changed files with 11 additions and 11 deletions
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13
mm/page_alloc.c
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@ -3896,8 +3896,8 @@ EXPORT_SYMBOL(free_pages);
* drivers to provide a backing region of memory for use as either an
* sk_buff->head, or to be used in the "frags" portion of skb_shared_info.
*/
static struct page *__page_frag_refill(struct page_frag_cache *nc,
gfp_t gfp_mask)
static struct page *__page_frag_cache_refill(struct page_frag_cache *nc,
gfp_t gfp_mask)
{
struct page *page = NULL;
gfp_t gfp = gfp_mask;
@ -3917,19 +3917,20 @@ static struct page *__page_frag_refill(struct page_frag_cache *nc,
return page;
}
void __page_frag_drain(struct page *page, unsigned int order,
unsigned int count)
void __page_frag_cache_drain(struct page *page, unsigned int count)
{
VM_BUG_ON_PAGE(page_ref_count(page) == 0, page);
if (page_ref_sub_and_test(page, count)) {
unsigned int order = compound_order(page);
if (order == 0)
free_hot_cold_page(page, false);
else
__free_pages_ok(page, order);
}
}
EXPORT_SYMBOL(__page_frag_drain);
EXPORT_SYMBOL(__page_frag_cache_drain);
void *page_frag_alloc(struct page_frag_cache *nc,
unsigned int fragsz, gfp_t gfp_mask)
@ -3940,7 +3941,7 @@ void *page_frag_alloc(struct page_frag_cache *nc,
if (unlikely(!nc->va)) {
refill:
page = __page_frag_refill(nc, gfp_mask);
page = __page_frag_cache_refill(nc, gfp_mask);
if (!page)
return NULL;