From c99c70e053030c657d3c6c38b6814f0510a7882d Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 14 Jul 2018 11:38:28 +0200 Subject: kernel: backport page fragment API changes from 4.10+ to 4.9 mt76 now relies on this API Signed-off-by: Felix Fietkau --- ..._page_frag-functions-to-__page_frag_cache.patch | 79 ++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch (limited to 'target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch') diff --git a/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch b/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch new file mode 100644 index 0000000000..117b01d504 --- /dev/null +++ b/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch @@ -0,0 +1,79 @@ +From: Alexander Duyck +Date: Tue, 10 Jan 2017 16:58:09 -0800 +Subject: [PATCH] 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 +--- + +--- a/include/linux/gfp.h ++++ b/include/linux/gfp.h +@@ -506,8 +506,7 @@ extern void free_hot_cold_page(struct pa + extern void free_hot_cold_page_list(struct list_head *list, bool cold); + + struct page_frag_cache; +-extern void __page_frag_drain(struct page *page, unsigned int order, +- unsigned int count); ++extern void __page_frag_cache_drain(struct page *page, unsigned int count); + extern void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask); + extern void page_frag_free(void *addr); +--- a/mm/page_alloc.c ++++ b/mm/page_alloc.c +@@ -3925,8 +3925,8 @@ 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; +@@ -3946,19 +3946,20 @@ static struct page *__page_frag_refill(s + 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) +@@ -3969,7 +3970,7 @@ void *page_frag_alloc(struct page_frag_c + + 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