From ef5d6356e2ace045fd388c1b6effb2253642b5c4 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 27 Sep 2021 14:16:04 +0200 Subject: [PATCH] cxgb: avoid open-coded offsetof() clang-14 does not like the custom offsetof() macro in vsc7326: drivers/net/ethernet/chelsio/cxgb/vsc7326.c:597:3: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction] HW_STAT(RxUnicast, RxUnicastFramesOK), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/chelsio/cxgb/vsc7326.c:594:56: note: expanded from macro 'HW_STAT' { reg, (&((struct cmac_statistics *)NULL)->stat_name) - (u64 *)NULL } Rewrite this to use the version provided by the kernel. Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb/vsc7326.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/chelsio/cxgb/vsc7326.c b/drivers/net/ethernet/chelsio/cxgb/vsc7326.c index 873c1c7..a19284b 100644 --- a/drivers/net/ethernet/chelsio/cxgb/vsc7326.c +++ b/drivers/net/ethernet/chelsio/cxgb/vsc7326.c @@ -591,7 +591,7 @@ static void port_stats_update(struct cmac *mac) } hw_stats[] = { #define HW_STAT(reg, stat_name) \ - { reg, (&((struct cmac_statistics *)NULL)->stat_name) - (u64 *)NULL } + { reg, offsetof(struct cmac_statistics, stat_name) / sizeof(u64) } /* Rx stats */ HW_STAT(RxUnicast, RxUnicastFramesOK), -- 2.7.4