From 2976db8018532b624c4123ae662fbc0814877abf Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 10 Jan 2017 16:58:09 -0800 Subject: mm: rename __page_frag functions to __page_frag_cache, drop order from drain 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/20170104023954.13451.5678.stgit@localhost.localdomain Signed-off-by: Alexander Duyck Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'mm/page_alloc.c') diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 097893ffe194..d604d2596b7b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -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; -- cgit v1.2.3-59-g8ed1b