From 82eb46f94ae5faa87ace248d950292c87384a097 Mon Sep 17 00:00:00 2001 From: Xie Yongji Date: Wed, 3 Aug 2022 12:55:20 +0800 Subject: [PATCH] vduse: Use memcpy_{to,from}_page() in do_bounce() kmap_atomic() is being deprecated in favor of kmap_local_page(). The use of kmap_atomic() in do_bounce() is all thread local therefore kmap_local_page() is a sufficient replacement. Convert to kmap_local_page() but, instead of open coding it, use the helpers memcpy_to_page() and memcpy_from_page(). Signed-off-by: Xie Yongji Acked-by: Jason Wang Reviewed-by: Muchun Song Message-Id: <20220803045523.23851-3-xieyongji@bytedance.com> Signed-off-by: Michael S. Tsirkin --- drivers/vdpa/vdpa_user/iova_domain.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c index bca1f0b8850c..50d7c08d5450 100644 --- a/drivers/vdpa/vdpa_user/iova_domain.c +++ b/drivers/vdpa/vdpa_user/iova_domain.c @@ -138,18 +138,17 @@ static void do_bounce(phys_addr_t orig, void *addr, size_t size, { unsigned long pfn = PFN_DOWN(orig); unsigned int offset = offset_in_page(orig); - char *buffer; + struct page *page; unsigned int sz = 0; while (size) { sz = min_t(size_t, PAGE_SIZE - offset, size); - buffer = kmap_atomic(pfn_to_page(pfn)); + page = pfn_to_page(pfn); if (dir == DMA_TO_DEVICE) - memcpy(addr, buffer + offset, sz); + memcpy_from_page(addr, page, offset, sz); else - memcpy(buffer + offset, addr, sz); - kunmap_atomic(buffer); + memcpy_to_page(page, offset, addr, sz); size -= sz; pfn++;