Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1].

[1] 
https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavo...@kernel.org>
---
 drivers/net/wireless/intel/iwlegacy/3945-mac.c | 2 +-
 drivers/net/wireless/intel/iwlegacy/4965-mac.c | 4 ++--
 drivers/net/wireless/intel/iwlegacy/common.c   | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlegacy/3945-mac.c 
b/drivers/net/wireless/intel/iwlegacy/3945-mac.c
index 9167c3d2711d..e3f79d6b978d 100644
--- a/drivers/net/wireless/intel/iwlegacy/3945-mac.c
+++ b/drivers/net/wireless/intel/iwlegacy/3945-mac.c
@@ -365,7 +365,7 @@ il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct 
ieee80211_tx_info *info,
 
        case WLAN_CIPHER_SUITE_WEP104:
                tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
-               /* fall through */
+               fallthrough;
        case WLAN_CIPHER_SUITE_WEP40:
                tx_cmd->sec_ctl |=
                    TX_CMD_SEC_WEP | (info->control.hw_key->
diff --git a/drivers/net/wireless/intel/iwlegacy/4965-mac.c 
b/drivers/net/wireless/intel/iwlegacy/4965-mac.c
index e73c223a7d28..9295344cd0d7 100644
--- a/drivers/net/wireless/intel/iwlegacy/4965-mac.c
+++ b/drivers/net/wireless/intel/iwlegacy/4965-mac.c
@@ -544,7 +544,7 @@ il4965_translate_rx_status(struct il_priv *il, u32 
decrypt_in)
                        decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
                        break;
                }
-               /* fall through - if TTAK OK */
+               fallthrough;    /* if TTAK OK */
        default:
                if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
                        decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
@@ -1617,7 +1617,7 @@ il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct 
ieee80211_tx_info *info,
 
        case WLAN_CIPHER_SUITE_WEP104:
                tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
-               /* fall through */
+               fallthrough;
        case WLAN_CIPHER_SUITE_WEP40:
                tx_cmd->sec_ctl |=
                    (TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
diff --git a/drivers/net/wireless/intel/iwlegacy/common.c 
b/drivers/net/wireless/intel/iwlegacy/common.c
index f78e062df572..6ede3b2a0b52 100644
--- a/drivers/net/wireless/intel/iwlegacy/common.c
+++ b/drivers/net/wireless/intel/iwlegacy/common.c
@@ -2677,7 +2677,7 @@ il_set_decrypted_flag(struct il_priv *il, struct 
ieee80211_hdr *hdr,
                if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
                    RX_RES_STATUS_BAD_KEY_TTAK)
                        break;
-               /* fall through */
+               fallthrough;
 
        case RX_RES_STATUS_SEC_TYPE_WEP:
                if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
@@ -2687,7 +2687,7 @@ il_set_decrypted_flag(struct il_priv *il, struct 
ieee80211_hdr *hdr,
                        D_RX("Packet destroyed\n");
                        return -1;
                }
-               /* fall through */
+               fallthrough;
        case RX_RES_STATUS_SEC_TYPE_CCMP:
                if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
                    RX_RES_STATUS_DECRYPT_OK) {
-- 
2.27.0

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