Whenever min(a, b) is used with a and b unsigned variables or literals, `make W=2` complains. Change four min() calls into umin(). stderr extract (GCC 11.2.0, MIPS Codescape): ./include/linux/minmax.h:68:57: warning: comparison is always true due to limited range of data type [-Wtype-limits] 68 | #define __is_nonneg(ux) statically_true((long long)(ux) >= 0) | ^~ drivers/net/ethernet/cadence/macb_main.c:2299:26: note: in expansion of macro ‘min’ 2299 | hdrlen = min(skb_headlen(skb), bp->max_tx_length); | ^~~ Signed-off-by: Théo Lebrun --- drivers/net/ethernet/cadence/macb_main.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 98e28d51a6e12c24ef27c939363eb43c0aec1951..6c6bc6aa23c718772b95b398e807f193a38e141a 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -2035,7 +2035,7 @@ static unsigned int macb_tx_map(struct macb *bp, count++; tx_head++; - size = min(len, bp->max_tx_length); + size = umin(len, bp->max_tx_length); } /* Then, map paged data from fragments */ @@ -2045,7 +2045,7 @@ static unsigned int macb_tx_map(struct macb *bp, len = skb_frag_size(frag); offset = 0; while (len) { - size = min(len, bp->max_tx_length); + size = umin(len, bp->max_tx_length); entry = macb_tx_ring_wrap(bp, tx_head); tx_skb = &queue->tx_skb[entry]; @@ -2301,7 +2301,7 @@ static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_BUSY; } } else - hdrlen = min(skb_headlen(skb), bp->max_tx_length); + hdrlen = umin(skb_headlen(skb), bp->max_tx_length); #if defined(DEBUG) && defined(VERBOSE_DEBUG) netdev_vdbg(bp->dev, @@ -4573,8 +4573,8 @@ static int macb_init(struct platform_device *pdev) * each 4-tuple define requires 1 T2 screener reg + 3 compare regs */ reg = gem_readl(bp, DCFG8); - bp->max_tuples = min((GEM_BFEXT(SCR2CMP, reg) / 3), - GEM_BFEXT(T2SCR, reg)); + bp->max_tuples = umin((GEM_BFEXT(SCR2CMP, reg) / 3), + GEM_BFEXT(T2SCR, reg)); INIT_LIST_HEAD(&bp->rx_fs_list.list); if (bp->max_tuples > 0) { /* also needs one ethtype match to check IPv4 */ -- 2.51.0