Commit e669d2f6 authored by Linus Walleij's avatar Linus Walleij
Browse files

dma-buf: heaps: Clear CMA pages with clear_pages() 



As of commit 62a9f5a8
"mm: introduce clear_pages() and clear_user_pages()" we can
clear a range of pages with a potentially assembly-optimized
call.

Instead of using a memset, use this helper to clear the whole
range of pages from the CMA allocation.

Reviewed-by: default avatarT.J. Mercier <tjmercier@google.com>
Reviewed-by: default avatarMaxime Ripard <mripard@kernel.org>
Signed-off-by: default avatarLinus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260310-cma-heap-clear-pages-v2-1-ecbbed3d7e6d@kernel.org
parent dfda8e9a

drivers/dma-buf/heaps/cma_heap.c

+1 −1
Original line number Diff line number Diff line
@@ -343,7 +343,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap, 
			nr_clear_pages--;

		}

	} else {

		memset(page_address(cma_pages), 0, size);

		clear_pages(page_address(cma_pages), pagecount);

	}



	buffer->pages = kmalloc_objs(*buffer->pages, pagecount);