From: Aaron Lu <aaron.lu@xxxxxxxxx> [ Upstream commit 742aa7fb52c56fb3b307e704f93e67b698959cc2 ] There are multiple places of freeing a page, they all do the same things so a common function can be used to reduce code duplicate. It also avoids bug fixed in one function but left in another. Link: http://lkml.kernel.org/r/20181119134834.17765-3-aaron.lu@xxxxxxxxx Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Cc: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx> Cc: Ilias Apalodimas <ilias.apalodimas@xxxxxxxxxx> Cc: Jesper Dangaard Brouer <brouer@xxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Cc: Pankaj gupta <pagupta@xxxxxxxxxx> Cc: Pawel Staszewski <pstaszewski@xxxxxxxxx> Cc: Tariq Toukan <tariqt@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- mm/page_alloc.c | 37 ++++++++++++++----------------------- 1 file changed, 14 insertions(+), 23 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index dcc46d955df2e..74fb5c338e8fb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4451,16 +4451,19 @@ unsigned long get_zeroed_page(gfp_t gfp_mask) } EXPORT_SYMBOL(get_zeroed_page); -void __free_pages(struct page *page, unsigned int order) +static inline void free_the_page(struct page *page, unsigned int order) { - if (put_page_testzero(page)) { - if (order == 0) - free_unref_page(page); - else - __free_pages_ok(page, order); - } + if (order == 0) /* Via pcp? */ + free_unref_page(page); + else + __free_pages_ok(page, order); } +void __free_pages(struct page *page, unsigned int order) +{ + if (put_page_testzero(page)) + free_the_page(page, order); +} EXPORT_SYMBOL(__free_pages); void free_pages(unsigned long addr, unsigned int order) @@ -4509,14 +4512,8 @@ 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_unref_page(page); - else - __free_pages_ok(page, order); - } + if (page_ref_sub_and_test(page, count)) + free_the_page(page, compound_order(page)); } EXPORT_SYMBOL(__page_frag_cache_drain); @@ -4581,14 +4578,8 @@ void page_frag_free(void *addr) { struct page *page = virt_to_head_page(addr); - if (unlikely(put_page_testzero(page))) { - unsigned int order = compound_order(page); - - if (order == 0) /* Via pcp? */ - free_unref_page(page); - else - __free_pages_ok(page, order); - } + if (unlikely(put_page_testzero(page))) + free_the_page(page, compound_order(page)); } EXPORT_SYMBOL(page_frag_free); -- 2.20.1
