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Commit dece303f authored by Arnd Bergmann's avatar Arnd Bergmann Committed by David S. Miller
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net: xgene: move xgene_cle_ptree_ewdn data off stack 

The array for initializing the cle is set up on the stack with
almost entirely constant data and then passed to a function that
converts it into HW specific bit patterns. With the latest
addition, the size of this array has grown to the point that
we get a warning about potential stack overflow in allmodconfig
builds:

xgene_enet_cle.c: In function ‘xgene_enet_cle_init’:
xgene_enet_cle.c:836:1: error: the frame size of 1032 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

Looking a bit deeper at the usage, I noticed that the only modification
of the data is in dead code, as we don't even use the cle module
for phy_mode other than PHY_INTERFACE_MODE_XGMII. This means we
can simply mark the structure constant and access it directly rather
than passing the pointer down through another structure, making
the code more efficient at the same time as avoiding the
warning.

Fixes: a809701f ("drivers: net: xgene: fix: RSS for non-TCP/UDP")
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9afd8952
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Showing with 381 additions and 389 deletions
drivers/net/ethernet/apm/xgene/xgene_enet_cle.c
View file @ dece303f
......@@ -79,10 +79,10 @@ static void xgene_cle_kn_to_hw(struct xgene_cle_ptree_kn *kn, u32 *buf)
}
}
static void xgene_cle_dn_to_hw(struct xgene_cle_ptree_ewdn *dn,
static void xgene_cle_dn_to_hw(const struct xgene_cle_ptree_ewdn *dn,
u32 *buf, u32 jb)
{
struct xgene_cle_ptree_branch *br;
const struct xgene_cle_ptree_branch *br;
u32 i, j = 0;
u32 npp;
......@@ -205,17 +205,385 @@ static int xgene_cle_setup_dbptr(struct xgene_enet_pdata *pdata,
return 0;
}
static const struct xgene_cle_ptree_ewdn xgene_init_ptree_dn[] = {
{
/* PKT_TYPE_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
.num_branches = 2,
.branch = {
{
/* IPV4 */
.valid = 1,
.next_packet_pointer = 22,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = PKT_PROT_NODE,
.next_branch = 0,
.data = 0x8,
.mask = 0x0
},
{
.valid = 0,
.next_packet_pointer = 262,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
},
},
{
/* PKT_PROT_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
.num_branches = 3,
.branch = {
{
/* TCP */
.valid = 1,
.next_packet_pointer = 26,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 0,
.data = 0x0600,
.mask = 0x00ff
},
{
/* UDP */
.valid = 1,
.next_packet_pointer = 26,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 0,
.data = 0x1100,
.mask = 0x00ff
},
{
.valid = 0,
.next_packet_pointer = 26,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* RSS_IPV4_TCP_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = BOTH_BYTES,
.result_pointer = DB_RES_DROP,
.num_branches = 6,
.branch = {
{
/* SRC IPV4 B01 */
.valid = 0,
.next_packet_pointer = 28,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 1,
.data = 0x0,
.mask = 0xffff
},
{
/* SRC IPV4 B23 */
.valid = 0,
.next_packet_pointer = 30,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 2,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B01 */
.valid = 0,
.next_packet_pointer = 32,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 3,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B23 */
.valid = 0,
.next_packet_pointer = 34,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 4,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP SRC Port */
.valid = 0,
.next_packet_pointer = 36,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 5,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP DST Port */
.valid = 0,
.next_packet_pointer = 256,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* RSS_IPV4_UDP_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = BOTH_BYTES,
.result_pointer = DB_RES_DROP,
.num_branches = 6,
.branch = {
{
/* SRC IPV4 B01 */
.valid = 0,
.next_packet_pointer = 28,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 1,
.data = 0x0,
.mask = 0xffff
},
{
/* SRC IPV4 B23 */
.valid = 0,
.next_packet_pointer = 30,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 2,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B01 */
.valid = 0,
.next_packet_pointer = 32,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 3,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B23 */
.valid = 0,
.next_packet_pointer = 34,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 4,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP SRC Port */
.valid = 0,
.next_packet_pointer = 36,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 5,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP DST Port */
.valid = 0,
.next_packet_pointer = 258,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* RSS_IPV4_OTHERS_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = BOTH_BYTES,
.result_pointer = DB_RES_DROP,
.num_branches = 6,
.branch = {
{
/* SRC IPV4 B01 */
.valid = 0,
.next_packet_pointer = 28,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 1,
.data = 0x0,
.mask = 0xffff
},
{
/* SRC IPV4 B23 */
.valid = 0,
.next_packet_pointer = 30,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 2,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B01 */
.valid = 0,
.next_packet_pointer = 32,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 3,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B23 */
.valid = 0,
.next_packet_pointer = 34,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 4,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP SRC Port */
.valid = 0,
.next_packet_pointer = 36,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 5,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP DST Port */
.valid = 0,
.next_packet_pointer = 260,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* LAST NODE */
.node_type = EWDN,
.last_node = 1,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
.num_branches = 1,
.branch = {
{
.valid = 0,
.next_packet_pointer = 0,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = MAX_NODES,
.next_branch = 0,
.data = 0,
.mask = 0xffff
}
}
}
};
static int xgene_cle_setup_node(struct xgene_enet_pdata *pdata,
struct xgene_enet_cle *cle)
{
struct xgene_cle_ptree *ptree = &cle->ptree;
struct xgene_cle_ptree_ewdn *dn = ptree->dn;
const struct xgene_cle_ptree_ewdn *dn = xgene_init_ptree_dn;
int num_dn = ARRAY_SIZE(xgene_init_ptree_dn);
struct xgene_cle_ptree_kn *kn = ptree->kn;
u32 buf[CLE_DRAM_REGS];
int i, j, ret;
memset(buf, 0, sizeof(buf));
for (i = 0; i < ptree->num_dn; i++) {
for (i = 0; i < num_dn; i++) {
xgene_cle_dn_to_hw(&dn[i], buf, cle->jump_bytes);
ret = xgene_cle_dram_wr(cle, buf, 17, i + ptree->start_node,
PTREE_RAM, CLE_CMD_WR);
......@@ -225,8 +593,8 @@ static int xgene_cle_setup_node(struct xgene_enet_pdata *pdata,
/* continue node index for key node */
memset(buf, 0, sizeof(buf));
for (j = i; j < (ptree->num_kn + ptree->num_dn); j++) {
xgene_cle_kn_to_hw(&kn[j - ptree->num_dn], buf);
for (j = i; j < (ptree->num_kn + num_dn); j++) {
xgene_cle_kn_to_hw(&kn[j - num_dn], buf);
ret = xgene_cle_dram_wr(cle, buf, 17, j + ptree->start_node,
PTREE_RAM, CLE_CMD_WR);
if (ret)
......@@ -407,392 +775,20 @@ static int xgene_enet_cle_init(struct xgene_enet_pdata *pdata)
struct xgene_enet_cle *enet_cle = &pdata->cle;
u32 def_qid, def_fpsel, def_nxtfpsel, pool_id;
struct xgene_cle_dbptr dbptr[DB_MAX_PTRS];
struct xgene_cle_ptree_branch *br;
struct xgene_cle_ptree *ptree;
struct xgene_cle_ptree_kn kn;
int ret;
struct xgene_cle_ptree_ewdn ptree_dn[] = {
{
/* PKT_TYPE_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
.num_branches = 2,
.branch = {
{
/* IPV4 */
.valid = 1,
.next_packet_pointer = 22,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = PKT_PROT_NODE,
.next_branch = 0,
.data = 0x8,
.mask = 0x0
},
{
.valid = 0,
.next_packet_pointer = 262,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
},
},
{
/* PKT_PROT_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
.num_branches = 3,
.branch = {
{
/* TCP */
.valid = 1,
.next_packet_pointer = 26,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 0,
.data = 0x0600,
.mask = 0x00ff
},
{
/* UDP */
.valid = 1,
.next_packet_pointer = 26,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 0,
.data = 0x1100,
.mask = 0x00ff
},
{
.valid = 0,
.next_packet_pointer = 26,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* RSS_IPV4_TCP_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = BOTH_BYTES,
.result_pointer = DB_RES_DROP,
.num_branches = 6,
.branch = {
{
/* SRC IPV4 B01 */
.valid = 0,
.next_packet_pointer = 28,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 1,
.data = 0x0,
.mask = 0xffff
},
{
/* SRC IPV4 B23 */
.valid = 0,
.next_packet_pointer = 30,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 2,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B01 */
.valid = 0,
.next_packet_pointer = 32,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 3,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B23 */
.valid = 0,
.next_packet_pointer = 34,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 4,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP SRC Port */
.valid = 0,
.next_packet_pointer = 36,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_TCP_NODE,
.next_branch = 5,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP DST Port */
.valid = 0,
.next_packet_pointer = 256,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* RSS_IPV4_UDP_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = BOTH_BYTES,
.result_pointer = DB_RES_DROP,
.num_branches = 6,
.branch = {
{
/* SRC IPV4 B01 */
.valid = 0,
.next_packet_pointer = 28,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 1,
.data = 0x0,
.mask = 0xffff
},
{
/* SRC IPV4 B23 */
.valid = 0,
.next_packet_pointer = 30,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 2,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B01 */
.valid = 0,
.next_packet_pointer = 32,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 3,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B23 */
.valid = 0,
.next_packet_pointer = 34,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 4,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP SRC Port */
.valid = 0,
.next_packet_pointer = 36,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_UDP_NODE,
.next_branch = 5,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP DST Port */
.valid = 0,
.next_packet_pointer = 258,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* RSS_IPV4_OTHERS_NODE */
.node_type = EWDN,
.last_node = 0,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = BOTH_BYTES,
.result_pointer = DB_RES_DROP,
.num_branches = 6,
.branch = {
{
/* SRC IPV4 B01 */
.valid = 0,
.next_packet_pointer = 28,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 1,
.data = 0x0,
.mask = 0xffff
},
{
/* SRC IPV4 B23 */
.valid = 0,
.next_packet_pointer = 30,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 2,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B01 */
.valid = 0,
.next_packet_pointer = 32,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 3,
.data = 0x0,
.mask = 0xffff
},
{
/* DST IPV4 B23 */
.valid = 0,
.next_packet_pointer = 34,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 4,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP SRC Port */
.valid = 0,
.next_packet_pointer = 36,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = RSS_IPV4_OTHERS_NODE,
.next_branch = 5,
.data = 0x0,
.mask = 0xffff
},
{
/* TCP DST Port */
.valid = 0,
.next_packet_pointer = 260,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = LAST_NODE,
.next_branch = 0,
.data = 0x0,
.mask = 0xffff
}
}
},
{
/* LAST NODE */
.node_type = EWDN,
.last_node = 1,
.hdr_len_store = 1,
.hdr_extn = NO_BYTE,
.byte_store = NO_BYTE,
.search_byte_store = NO_BYTE,
.result_pointer = DB_RES_DROP,
.num_branches = 1,
.branch = {
{
.valid = 0,
.next_packet_pointer = 0,
.jump_bw = JMP_FW,
.jump_rel = JMP_ABS,
.operation = EQT,
.next_node = MAX_NODES,
.next_branch = 0,
.data = 0,
.mask = 0xffff
}
}
}
};
if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII)
return -EINVAL;
ptree = &enet_cle->ptree;
ptree->start_pkt = 12; /* Ethertype */
if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
ret = xgene_cle_setup_rss(pdata);
if (ret) {
netdev_err(pdata->ndev, "RSS initialization failed\n");
return ret;
}
} else {
br = &ptree_dn[PKT_PROT_NODE].branch[0];
br->valid = 0;
br->next_packet_pointer = 260;
br->next_node = LAST_NODE;
br->data = 0x0000;
br->mask = 0xffff;
ret = xgene_cle_setup_rss(pdata);
if (ret) {
netdev_err(pdata->ndev, "RSS initialization failed\n");
return ret;
}
def_qid = xgene_enet_dst_ring_num(pdata->rx_ring[0]);
......@@ -825,10 +821,8 @@ static int xgene_enet_cle_init(struct xgene_enet_pdata *pdata)
kn.key[0].priority = 0;
kn.key[0].result_pointer = DB_RES_ACCEPT;
ptree->dn = ptree_dn;
ptree->kn = &kn;
ptree->dbptr = dbptr;
ptree->num_dn = MAX_NODES;
ptree->num_kn = 1;
ptree->num_dbptr = DB_MAX_PTRS;
......
drivers/net/ethernet/apm/xgene/xgene_enet_cle.h
View file @ dece303f
......@@ -278,10 +278,8 @@ struct xgene_cle_dbptr {
};
struct xgene_cle_ptree {
struct xgene_cle_ptree_ewdn *dn;
struct xgene_cle_ptree_kn *kn;
struct xgene_cle_dbptr *dbptr;
u32 num_dn;
u32 num_kn;
u32 num_dbptr;
u32 start_node;
......
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