As of commit 62a9f5a85b98
"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.
Signed-off-by: Linus Walleij <linusw(a)kernel.org>
---
drivers/dma-buf/heaps/cma_heap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c
index bd3370b9a3f6..f0bacf25ed9d 100644
--- a/drivers/dma-buf/heaps/cma_heap.c
+++ b/drivers/dma-buf/heaps/cma_heap.c
@@ -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);
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260303-cma-heap-clear-pages-540f3ac9f734
Best regards,
--
Linus Walleij <linusw(a)kernel.org>
