Re: [PATCH v3 18/26] page_pool: Allow page_pool_recycle_direct() to take a netmem or a page

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On 11/01/2023 14.43, Matthew Wilcox wrote:
On Wed, Jan 11, 2023 at 08:48:30PM +0800, kernel test robot wrote:
drivers/net/ethernet/broadcom/bnxt/bnxt.c:2978:4: error: controlling expression type 'void *' not compatible with any generic association type
                            page_pool_recycle_direct(rxr->page_pool, data);
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I swear I did an allmodconfig build ... don't know how I missed this
one.  I think I'll make the page_pool_recycle_direct() macro accept
void * as well, and treat it as a page.  Once we finish the conversion
to netmem, this problem will go away.

ie this:

+++ b/include/net/page_pool.h
@@ -485,7 +485,8 @@ static inline void __page_pool_recycle_page_direct(struct page_pool *pool,
#define page_pool_recycle_direct(pool, mem) _Generic((mem), \
         struct netmem *: __page_pool_recycle_direct(pool, (struct netmem *)mem),                \
-       struct page *:   __page_pool_recycle_page_direct(pool, (struct page *)mem))
+       struct page *:   __page_pool_recycle_page_direct(pool, (struct page *)mem),     \
+       void *:  __page_pool_recycle_page_direct(pool, (struct page *)mem))

I'm okay with this change, and you can add my acked by.

Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>

Maybe broadcom/bnxt driver should (later) be converted to not use void
pointers... cc. Andy.

--Jesper





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