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: Byungchul Park <byungchul@xxxxxx>
Reviewed-by: Mina Almasry <almasrymina@xxxxxxxxxx>
Reviewed-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
Reviewed-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
include/net/netmem.h | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/include/net/netmem.h b/include/net/netmem.h
index 7a1dafa3f080..de1d95f04076 100644
--- a/include/net/netmem.h
+++ b/include/net/netmem.h
@@ -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
--
2.17.1
