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

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As of commit 62a9f5a85b
"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: T.J. Mercier <tjmercier@google.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260310-cma-heap-clear-pages-v2-1-ecbbed3d7e6d@kernel.org
This commit is contained in:
Linus Walleij 2026-03-10 09:53:11 +01:00
parent dfda8e9a28
commit e669d2f601
1 changed files with 1 additions and 1 deletions
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2
drivers/dma-buf/heaps/cma_heap.c
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@ -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);