From: Jian Shen Date: Wed, 21 Jun 2023 12:33:07 +0000 (+0800) Subject: net: hns3: refine the tcam key convert handle X-Git-Tag: v6.6.17~4555^2~27^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9b476494da1aad70f4f083e853eb817bcb292d08;p=platform%2Fkernel%2Flinux-rpi.git net: hns3: refine the tcam key convert handle The result of expression '(k ^ ~v) & k' is exactly the same with 'k & v', so simplify it. (k ^ ~v) & k == k & v The truth table (in non table form): k == 0, v == 0: (k ^ ~v) & k == (0 ^ ~0) & 0 == (0 ^ 1) & 0 == 1 & 0 == 0 k & v == 0 & 0 == 0 k == 0, v == 1: (k ^ ~v) & k == (0 ^ ~1) & 0 == (0 ^ 0) & 0 == 1 & 0 == 0 k & v == 0 & 1 == 0 k == 1, v == 0: (k ^ ~v) & k == (1 ^ ~0) & 1 == (1 ^ 1) & 1 == 0 & 1 == 0 k & v == 1 & 0 == 0 k == 1, v == 1: (k ^ ~v) & k == (1 ^ ~1) & 1 == (1 ^ 0) & 1 == 1 & 1 == 1 k & v == 1 & 1 == 1 Signed-off-by: Jian Shen Signed-off-by: Hao Lan Signed-off-by: Paolo Abeni --- diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h index 81aa6b0..6a43d15 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h @@ -835,15 +835,10 @@ struct hclge_vf_vlan_cfg { * Then for input key(k) and mask(v), we can calculate the value by * the formulae: * x = (~k) & v - * y = (k ^ ~v) & k + * y = k & v */ -#define calc_x(x, k, v) (x = ~(k) & (v)) -#define calc_y(y, k, v) \ - do { \ - const typeof(k) _k_ = (k); \ - const typeof(v) _v_ = (v); \ - (y) = (_k_ ^ ~_v_) & (_k_); \ - } while (0) +#define calc_x(x, k, v) ((x) = ~(k) & (v)) +#define calc_y(y, k, v) ((y) = (k) & (v)) #define HCLGE_MAC_STATS_FIELD_OFF(f) (offsetof(struct hclge_mac_stats, f)) #define HCLGE_STATS_READ(p, offset) (*(u64 *)((u8 *)(p) + (offset)))