Commit 4369d40d authored by Byungchul Park's avatar Byungchul Park Committed by Jakub Kicinski
Browse files

netmem: use _Generic to cover const casting for page_to_netmem() 



The current page_to_netmem() doesn't cover const casting resulting in
trying to cast const struct page * to const netmem_ref fails.

To cover the case, change page_to_netmem() to use macro and _Generic.

Signed-off-by: default avatarByungchul Park <byungchul@sk.com>
Reviewed-by: default avatarMina Almasry <almasrymina@google.com>
Reviewed-by: default avatarToke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/20250702053256.4594-5-byungchul@sk.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent b56ce868

include/net/netmem.h

+3 −4
Original line number Diff line number Diff line
@@ -139,10 +139,9 @@ static inline netmem_ref net_iov_to_netmem(struct net_iov *niov) 
	return (__force netmem_ref)((unsigned long)niov | NET_IOV);

}



static inline netmem_ref page_to_netmem(const struct page *page)

{

	return (__force netmem_ref)page;

}

#define page_to_netmem(p)	(_Generic((p),			\

	const struct page * :	(__force const netmem_ref)(p),	\

	struct page * :		(__force netmem_ref)(p)))



/**

 * virt_to_netmem - convert virtual memory pointer to a netmem reference