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Commit adc71682 authored by David S. Miller's avatar David S. Miller
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Merge bk://kernel.bkbits.net/acme/net-2.5 

into nuts.ninka.net:/home/davem/src/BK/net-2.5
parents ff7095c0 0931a9dd
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Showing with 120 additions and 120 deletions
include/net/llc_pdu.h
View file @ adc71682
...@@ -39,8 +39,8 @@ ...@@ -39,8 +39,8 @@
#define LLC_PDU_CMD_RSP_MASK 0x01 #define LLC_PDU_CMD_RSP_MASK 0x01
#define LLC_PDU_CMD 0 #define LLC_PDU_CMD 0
#define LLC_PDU_RSP 1 #define LLC_PDU_RSP 1
#define LLC_PDU_IS_CMD(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 1 : 0) #define LLC_PDU_IS_CMD(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 0 : 1)
#define LLC_PDU_IS_RSP(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 0 : 1) #define LLC_PDU_IS_RSP(pdu) ((pdu->ssap & LLC_PDU_RSP) ? 1 : 0)
/* Get PDU type from 2 lowest-order bits of control field first byte */ /* Get PDU type from 2 lowest-order bits of control field first byte */
#define LLC_PDU_TYPE_I_MASK 0x01 /* 16-bit control field */ #define LLC_PDU_TYPE_I_MASK 0x01 /* 16-bit control field */
...@@ -53,18 +53,18 @@ ...@@ -53,18 +53,18 @@
#define LLC_PDU_TYPE_U 3 /* first two bits */ #define LLC_PDU_TYPE_U 3 /* first two bits */
#define LLC_PDU_TYPE_IS_I(pdu) \ #define LLC_PDU_TYPE_IS_I(pdu) \
((!(pdu->ctrl_1 & LLC_PDU_TYPE_I_MASK)) ? 0 : 1) ((!(pdu->ctrl_1 & LLC_PDU_TYPE_I_MASK)) ? 1 : 0)
#define LLC_PDU_TYPE_IS_U(pdu) \ #define LLC_PDU_TYPE_IS_U(pdu) \
(((pdu->ctrl_1 & LLC_PDU_TYPE_U_MASK) == LLC_PDU_TYPE_U) ? 0 : 1) (((pdu->ctrl_1 & LLC_PDU_TYPE_U_MASK) == LLC_PDU_TYPE_U) ? 1 : 0)
#define LLC_PDU_TYPE_IS_S(pdu) \ #define LLC_PDU_TYPE_IS_S(pdu) \
(((pdu->ctrl_1 & LLC_PDU_TYPE_S_MASK) == LLC_PDU_TYPE_S) ? 0 : 1) (((pdu->ctrl_1 & LLC_PDU_TYPE_S_MASK) == LLC_PDU_TYPE_S) ? 1 : 0)
/* U-format PDU control field masks */ /* U-format PDU control field masks */
#define LLC_U_PF_BIT_MASK 0x10 /* P/F bit mask */ #define LLC_U_PF_BIT_MASK 0x10 /* P/F bit mask */
#define LLC_U_PF_IS_1(pdu) ((pdu->ctrl_1 & LLC_U_PF_BIT_MASK) ? 0 : 1) #define LLC_U_PF_IS_1(pdu) ((pdu->ctrl_1 & LLC_U_PF_BIT_MASK) ? 1 : 0)
#define LLC_U_PF_IS_0(pdu) ((!(pdu->ctrl_1 & LLC_U_PF_BIT_MASK)) ? 0 : 1) #define LLC_U_PF_IS_0(pdu) ((!(pdu->ctrl_1 & LLC_U_PF_BIT_MASK)) ? 1 : 0)
#define LLC_U_PDU_CMD_MASK 0xEC /* cmd/rsp mask */ #define LLC_U_PDU_CMD_MASK 0xEC /* cmd/rsp mask */
#define LLC_U_PDU_CMD(pdu) (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK) #define LLC_U_PDU_CMD(pdu) (pdu->ctrl_1 & LLC_U_PDU_CMD_MASK)
...@@ -119,8 +119,8 @@ ...@@ -119,8 +119,8 @@
#define LLC_I_PF_BIT_MASK 0x01 #define LLC_I_PF_BIT_MASK 0x01
#define LLC_I_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_I_PF_BIT_MASK)) ? 0 : 1) #define LLC_I_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_I_PF_BIT_MASK)) ? 1 : 0)
#define LLC_I_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_I_PF_BIT_MASK) ? 0 : 1) #define LLC_I_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_I_PF_BIT_MASK) ? 1 : 0)
/* S-PDU supervisory commands and responses */ /* S-PDU supervisory commands and responses */
...@@ -136,8 +136,8 @@ ...@@ -136,8 +136,8 @@
#define LLC_2_PDU_RSP_RNR 0x04 /* rx not ready rsp */ #define LLC_2_PDU_RSP_RNR 0x04 /* rx not ready rsp */
#define LLC_S_PF_BIT_MASK 0x01 #define LLC_S_PF_BIT_MASK 0x01
#define LLC_S_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_S_PF_BIT_MASK)) ? 0 : 1) #define LLC_S_PF_IS_0(pdu) ((!(pdu->ctrl_2 & LLC_S_PF_BIT_MASK)) ? 1 : 0)
#define LLC_S_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_S_PF_BIT_MASK) ? 0 : 1) #define LLC_S_PF_IS_1(pdu) ((pdu->ctrl_2 & LLC_S_PF_BIT_MASK) ? 1 : 0)
#define PDU_SUPV_GET_Nr(pdu) ((pdu->ctrl_2 & 0xFE) >> 1) #define PDU_SUPV_GET_Nr(pdu) ((pdu->ctrl_2 & 0xFE) >> 1)
#define PDU_GET_NEXT_Vr(sn) (++sn & ~LLC_2_SEQ_NBR_MODULO) #define PDU_GET_NEXT_Vr(sn) (++sn & ~LLC_2_SEQ_NBR_MODULO)
......
net/llc/llc_c_ac.c
View file @ adc71682
...@@ -102,13 +102,13 @@ int llc_conn_ac_disc_ind(struct sock *sk, struct sk_buff *skb) ...@@ -102,13 +102,13 @@ int llc_conn_ac_disc_ind(struct sock *sk, struct sk_buff *skb)
if (ev->type == LLC_CONN_EV_TYPE_PDU) { if (ev->type == LLC_CONN_EV_TYPE_PDU) {
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
if (!LLC_PDU_IS_RSP(pdu) && if (LLC_PDU_IS_RSP(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_DM) { LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_DM) {
reason = LLC_DISC_REASON_RX_DM_RSP_PDU; reason = LLC_DISC_REASON_RX_DM_RSP_PDU;
rc = 0; rc = 0;
} else if (!LLC_PDU_IS_CMD(pdu) && } else if (LLC_PDU_IS_CMD(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_DISC) { LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_DISC) {
reason = LLC_DISC_REASON_RX_DISC_CMD_PDU; reason = LLC_DISC_REASON_RX_DISC_CMD_PDU;
rc = 0; rc = 0;
...@@ -146,13 +146,13 @@ int llc_conn_ac_rst_ind(struct sock *sk, struct sk_buff *skb) ...@@ -146,13 +146,13 @@ int llc_conn_ac_rst_ind(struct sock *sk, struct sk_buff *skb)
switch (ev->type) { switch (ev->type) {
case LLC_CONN_EV_TYPE_PDU: case LLC_CONN_EV_TYPE_PDU:
if (!LLC_PDU_IS_RSP(pdu) && if (LLC_PDU_IS_RSP(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_FRMR) { LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_FRMR) {
reason = LLC_RESET_REASON_LOCAL; reason = LLC_RESET_REASON_LOCAL;
rc = 0; rc = 0;
} else if (!LLC_PDU_IS_CMD(pdu) && } else if (LLC_PDU_IS_CMD(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_SABME) { LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_SABME) {
reason = LLC_RESET_REASON_REMOTE; reason = LLC_RESET_REASON_REMOTE;
rc = 0; rc = 0;
...@@ -198,9 +198,9 @@ int llc_conn_ac_clear_remote_busy_if_f_eq_1(struct sock *sk, ...@@ -198,9 +198,9 @@ int llc_conn_ac_clear_remote_busy_if_f_eq_1(struct sock *sk,
{ {
struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
if (!LLC_PDU_IS_RSP(pdu) && if (LLC_PDU_IS_RSP(pdu) &&
!LLC_PDU_TYPE_IS_I(pdu) && LLC_PDU_TYPE_IS_I(pdu) &&
!LLC_I_PF_IS_1(pdu) && llc_sk(sk)->ack_pf) LLC_I_PF_IS_1(pdu) && llc_sk(sk)->ack_pf)
llc_conn_ac_clear_remote_busy(sk, skb); llc_conn_ac_clear_remote_busy(sk, skb);
return 0; return 0;
} }
...@@ -310,7 +310,7 @@ int llc_conn_ac_send_frmr_rsp_f_set_x(struct sock *sk, struct sk_buff *skb) ...@@ -310,7 +310,7 @@ int llc_conn_ac_send_frmr_rsp_f_set_x(struct sock *sk, struct sk_buff *skb)
struct llc_opt *llc = llc_sk(sk); struct llc_opt *llc = llc_sk(sk);
llc->rx_pdu_hdr = *((u32 *)pdu); llc->rx_pdu_hdr = *((u32 *)pdu);
if (!LLC_PDU_IS_CMD(pdu)) if (LLC_PDU_IS_CMD(pdu))
llc_pdu_decode_pf_bit(skb, &f_bit); llc_pdu_decode_pf_bit(skb, &f_bit);
else else
f_bit = 0; f_bit = 0;
...@@ -1228,7 +1228,7 @@ int llc_conn_ac_upd_p_flag(struct sock *sk, struct sk_buff *skb) ...@@ -1228,7 +1228,7 @@ int llc_conn_ac_upd_p_flag(struct sock *sk, struct sk_buff *skb)
{ {
struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
if (!LLC_PDU_IS_RSP(pdu)) { if (LLC_PDU_IS_RSP(pdu)) {
u8 f_bit; u8 f_bit;
llc_pdu_decode_pf_bit(skb, &f_bit); llc_pdu_decode_pf_bit(skb, &f_bit);
......
net/llc/llc_c_ev.c
View file @ adc71682
This diff is collapsed.
net/llc/llc_conn.c
View file @ adc71682
...@@ -356,7 +356,7 @@ static void llc_conn_send_pdus(struct sock *sk) ...@@ -356,7 +356,7 @@ static void llc_conn_send_pdus(struct sock *sk)
while ((skb = skb_dequeue(&sk->sk_write_queue)) != NULL) { while ((skb = skb_dequeue(&sk->sk_write_queue)) != NULL) {
struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
if (!LLC_PDU_TYPE_IS_I(pdu) && if (LLC_PDU_TYPE_IS_I(pdu) &&
!(skb->dev->flags & IFF_LOOPBACK)) { !(skb->dev->flags & IFF_LOOPBACK)) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
......
net/llc/llc_evnt.c
View file @ adc71682
...@@ -68,8 +68,8 @@ int llc_stat_ev_rx_null_dsap_xid_c(struct llc_station *station, ...@@ -68,8 +68,8 @@ int llc_stat_ev_rx_null_dsap_xid_c(struct llc_station *station,
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_STATION_EV_TYPE_PDU && return ev->type == LLC_STATION_EV_TYPE_PDU &&
!LLC_PDU_IS_CMD(pdu) && /* command PDU */ LLC_PDU_IS_CMD(pdu) && /* command PDU */
!LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID && LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID &&
!pdu->dsap ? 0 : 1; /* NULL DSAP value */ !pdu->dsap ? 0 : 1; /* NULL DSAP value */
} }
...@@ -81,8 +81,8 @@ int llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq(struct llc_station *station, ...@@ -81,8 +81,8 @@ int llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq(struct llc_station *station,
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_STATION_EV_TYPE_PDU && return ev->type == LLC_STATION_EV_TYPE_PDU &&
!LLC_PDU_IS_RSP(pdu) && /* response PDU */ LLC_PDU_IS_RSP(pdu) && /* response PDU */
!LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID && LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID &&
!pdu->dsap && /* NULL DSAP value */ !pdu->dsap && /* NULL DSAP value */
!station->xid_r_count ? 0 : 1; !station->xid_r_count ? 0 : 1;
...@@ -95,8 +95,8 @@ int llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq(struct llc_station *station, ...@@ -95,8 +95,8 @@ int llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq(struct llc_station *station,
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_STATION_EV_TYPE_PDU && return ev->type == LLC_STATION_EV_TYPE_PDU &&
!LLC_PDU_IS_RSP(pdu) && /* response PDU */ LLC_PDU_IS_RSP(pdu) && /* response PDU */
!LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID && LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID &&
!pdu->dsap && /* NULL DSAP value */ !pdu->dsap && /* NULL DSAP value */
station->xid_r_count == 1 ? 0 : 1; station->xid_r_count == 1 ? 0 : 1;
...@@ -109,8 +109,8 @@ int llc_stat_ev_rx_null_dsap_test_c(struct llc_station *station, ...@@ -109,8 +109,8 @@ int llc_stat_ev_rx_null_dsap_test_c(struct llc_station *station,
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_STATION_EV_TYPE_PDU && return ev->type == LLC_STATION_EV_TYPE_PDU &&
!LLC_PDU_IS_CMD(pdu) && /* command PDU */ LLC_PDU_IS_CMD(pdu) && /* command PDU */
!LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST && LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST &&
!pdu->dsap ? 0 : 1; /* NULL DSAP */ !pdu->dsap ? 0 : 1; /* NULL DSAP */
} }
......
net/llc/llc_s_ev.c
View file @ adc71682
...@@ -33,8 +33,8 @@ int llc_sap_ev_rx_ui(struct llc_sap *sap, struct sk_buff *skb) ...@@ -33,8 +33,8 @@ int llc_sap_ev_rx_ui(struct llc_sap *sap, struct sk_buff *skb)
struct llc_sap_state_ev *ev = llc_sap_ev(skb); struct llc_sap_state_ev *ev = llc_sap_ev(skb);
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_SAP_EV_TYPE_PDU && !LLC_PDU_IS_CMD(pdu) && return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_UI ? 0 : 1; LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_UI ? 0 : 1;
} }
...@@ -62,8 +62,8 @@ int llc_sap_ev_rx_xid_c(struct llc_sap *sap, struct sk_buff *skb) ...@@ -62,8 +62,8 @@ int llc_sap_ev_rx_xid_c(struct llc_sap *sap, struct sk_buff *skb)
struct llc_sap_state_ev *ev = llc_sap_ev(skb); struct llc_sap_state_ev *ev = llc_sap_ev(skb);
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_SAP_EV_TYPE_PDU && !LLC_PDU_IS_CMD(pdu) && return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1; LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1;
} }
...@@ -72,8 +72,8 @@ int llc_sap_ev_rx_xid_r(struct llc_sap *sap, struct sk_buff *skb) ...@@ -72,8 +72,8 @@ int llc_sap_ev_rx_xid_r(struct llc_sap *sap, struct sk_buff *skb)
struct llc_sap_state_ev *ev = llc_sap_ev(skb); struct llc_sap_state_ev *ev = llc_sap_ev(skb);
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_SAP_EV_TYPE_PDU && !LLC_PDU_IS_RSP(pdu) && return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1; LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID ? 0 : 1;
} }
...@@ -91,8 +91,8 @@ int llc_sap_ev_rx_test_c(struct llc_sap *sap, struct sk_buff *skb) ...@@ -91,8 +91,8 @@ int llc_sap_ev_rx_test_c(struct llc_sap *sap, struct sk_buff *skb)
struct llc_sap_state_ev *ev = llc_sap_ev(skb); struct llc_sap_state_ev *ev = llc_sap_ev(skb);
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_SAP_EV_TYPE_PDU && !LLC_PDU_IS_CMD(pdu) && return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_CMD(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1; LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1;
} }
...@@ -101,8 +101,8 @@ int llc_sap_ev_rx_test_r(struct llc_sap *sap, struct sk_buff *skb) ...@@ -101,8 +101,8 @@ int llc_sap_ev_rx_test_r(struct llc_sap *sap, struct sk_buff *skb)
struct llc_sap_state_ev *ev = llc_sap_ev(skb); struct llc_sap_state_ev *ev = llc_sap_ev(skb);
struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
return ev->type == LLC_SAP_EV_TYPE_PDU && !LLC_PDU_IS_RSP(pdu) && return ev->type == LLC_SAP_EV_TYPE_PDU && LLC_PDU_IS_RSP(pdu) &&
!LLC_PDU_TYPE_IS_U(pdu) && LLC_PDU_TYPE_IS_U(pdu) &&
LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1; LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_TEST ? 0 : 1;
} }
......
net/sctp/socket.c
View file @ adc71682
...@@ -3328,7 +3328,7 @@ static struct sctp_bind_bucket *sctp_bucket_create( ...@@ -3328,7 +3328,7 @@ static struct sctp_bind_bucket *sctp_bucket_create(
/* Caller must hold hashbucket lock for this tb with local BH disabled */ /* Caller must hold hashbucket lock for this tb with local BH disabled */
static void sctp_bucket_destroy(struct sctp_bind_bucket *pp) static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
{ {
if (!hlist_empty(&pp->sk_list)) { if (hlist_empty(&pp->sk_list)) {
if (pp->next) if (pp->next)
pp->next->pprev = pp->pprev; pp->next->pprev = pp->pprev;
*(pp->pprev) = pp->next; *(pp->pprev) = pp->next;
......
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