Arnd Bergmann <arnd@xxxxxxxxxx> writes: > From: Arnd Bergmann <arnd@xxxxxxxx> > > clang complains about some NULL pointer arithmetic in this driver: > > drivers/net/wireless/marvell/mwifiex/sta_tx.c:65:59: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction] > pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)- > ^ > drivers/net/wireless/marvell/mwifiex/uap_txrx.c:478:53: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction] > pad = ((void *)skb->data - (sizeof(*txpd) + hroom) - NULL) & > > Rework that expression to do the same thing using a uintptr_t. > > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> I'll queue this to v5.15. -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
