#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/types.h>
+#include <linux/uaccess.h>
#include "linux/ntb.h"
#include "linux/ntb_transport.h"
module_param(max_mw_size, ulong, 0644);
MODULE_PARM_DESC(max_mw_size, "Limit size of large memory windows");
-static unsigned int transport_mtu = 0x401E;
+static unsigned int transport_mtu = 0x10000;
module_param(transport_mtu, uint, 0644);
MODULE_PARM_DESC(transport_mtu, "Maximum size of NTB transport packets");
module_param(copy_bytes, uint, 0644);
MODULE_PARM_DESC(copy_bytes, "Threshold under which NTB will use the CPU to copy instead of DMA");
+static bool use_dma;
+module_param(use_dma, bool, 0644);
+MODULE_PARM_DESC(use_dma, "Use DMA engine to perform large data copy");
+
static struct dentry *nt_debugfs_dir;
struct ntb_queue_entry {
void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data,
void *data, int len);
+ struct list_head rx_post_q;
struct list_head rx_pend_q;
struct list_head rx_free_q;
- spinlock_t ntb_rx_pend_q_lock;
- spinlock_t ntb_rx_free_q_lock;
+ /* ntb_rx_q_lock: synchronize access to rx_XXXX_q */
+ spinlock_t ntb_rx_q_lock;
void *rx_buff;
unsigned int rx_index;
unsigned int rx_max_entry;
bool link_is_up;
struct delayed_work link_work;
struct work_struct link_cleanup;
+
+ struct dentry *debugfs_node_dir;
};
enum {
{
struct ntb_transport_client_dev *client_dev;
struct ntb_transport_ctx *nt;
+ int node;
int rc, i = 0;
if (list_empty(&ntb_transport_list))
list_for_each_entry(nt, &ntb_transport_list, entry) {
struct device *dev;
- client_dev = kzalloc(sizeof(*client_dev),
- GFP_KERNEL);
+ node = dev_to_node(&nt->ndev->dev);
+
+ client_dev = kzalloc_node(sizeof(*client_dev),
+ GFP_KERNEL, node);
if (!client_dev) {
rc = -ENOMEM;
goto err;
char *buf;
ssize_t ret, out_offset, out_count;
+ qp = filp->private_data;
+
+ if (!qp || !qp->link_is_up)
+ return 0;
+
out_count = 1000;
buf = kmalloc(out_count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- qp = filp->private_data;
out_offset = 0;
out_offset += snprintf(buf + out_offset, out_count - out_offset,
"NTB QP stats\n");
return entry;
}
+static struct ntb_queue_entry *ntb_list_mv(spinlock_t *lock,
+ struct list_head *list,
+ struct list_head *to_list)
+{
+ struct ntb_queue_entry *entry;
+ unsigned long flags;
+
+ spin_lock_irqsave(lock, flags);
+
+ if (list_empty(list)) {
+ entry = NULL;
+ } else {
+ entry = list_first_entry(list, struct ntb_queue_entry, entry);
+ list_move_tail(&entry->entry, to_list);
+ }
+
+ spin_unlock_irqrestore(lock, flags);
+
+ return entry;
+}
+
static int ntb_transport_setup_qp_mw(struct ntb_transport_ctx *nt,
unsigned int qp_num)
{
}
static int ntb_set_mw(struct ntb_transport_ctx *nt, int num_mw,
- unsigned int size)
+ resource_size_t size)
{
struct ntb_transport_mw *mw = &nt->mw_vec[num_mw];
struct pci_dev *pdev = nt->ndev->pdev;
- unsigned int xlat_size, buff_size;
+ size_t xlat_size, buff_size;
int rc;
+ if (!size)
+ return -EINVAL;
+
xlat_size = round_up(size, mw->xlat_align_size);
buff_size = round_up(size, mw->xlat_align);
if (!mw->virt_addr) {
mw->xlat_size = 0;
mw->buff_size = 0;
- dev_err(&pdev->dev, "Unable to alloc MW buff of size %d\n",
+ dev_err(&pdev->dev, "Unable to alloc MW buff of size %zu\n",
buff_size);
return -ENOMEM;
}
return 0;
}
+static void ntb_qp_link_down_reset(struct ntb_transport_qp *qp)
+{
+ qp->link_is_up = false;
+
+ qp->tx_index = 0;
+ qp->rx_index = 0;
+ qp->rx_bytes = 0;
+ qp->rx_pkts = 0;
+ qp->rx_ring_empty = 0;
+ qp->rx_err_no_buf = 0;
+ qp->rx_err_oflow = 0;
+ qp->rx_err_ver = 0;
+ qp->rx_memcpy = 0;
+ qp->rx_async = 0;
+ qp->tx_bytes = 0;
+ qp->tx_pkts = 0;
+ qp->tx_ring_full = 0;
+ qp->tx_err_no_buf = 0;
+ qp->tx_memcpy = 0;
+ qp->tx_async = 0;
+}
+
static void ntb_qp_link_cleanup(struct ntb_transport_qp *qp)
{
struct ntb_transport_ctx *nt = qp->transport;
struct pci_dev *pdev = nt->ndev->pdev;
- if (qp->link_is_up) {
- cancel_delayed_work_sync(&qp->link_work);
- return;
- }
+ dev_info(&pdev->dev, "qp %d: Link Cleanup\n", qp->qp_num);
- dev_info(&pdev->dev, "qp %d: Link Down\n", qp->qp_num);
- qp->link_is_up = false;
+ cancel_delayed_work_sync(&qp->link_work);
+ ntb_qp_link_down_reset(qp);
if (qp->event_handler)
qp->event_handler(qp->cb_data, qp->link_is_up);
ntb_peer_spad_write(ndev, VERSION, NTB_TRANSPORT_VERSION);
/* Query the remote side for its info */
- val = ntb_peer_spad_read(ndev, VERSION);
+ val = ntb_spad_read(ndev, VERSION);
dev_dbg(&pdev->dev, "Remote version = %d\n", val);
if (val != NTB_TRANSPORT_VERSION)
goto out;
- val = ntb_peer_spad_read(ndev, NUM_QPS);
+ val = ntb_spad_read(ndev, NUM_QPS);
dev_dbg(&pdev->dev, "Remote max number of qps = %d\n", val);
if (val != nt->qp_count)
goto out;
- val = ntb_peer_spad_read(ndev, NUM_MWS);
+ val = ntb_spad_read(ndev, NUM_MWS);
dev_dbg(&pdev->dev, "Remote number of mws = %d\n", val);
if (val != nt->mw_count)
goto out;
for (i = 0; i < nt->mw_count; i++) {
u64 val64;
- val = ntb_peer_spad_read(ndev, MW0_SZ_HIGH + (i * 2));
+ val = ntb_spad_read(ndev, MW0_SZ_HIGH + (i * 2));
val64 = (u64)val << 32;
- val = ntb_peer_spad_read(ndev, MW0_SZ_LOW + (i * 2));
+ val = ntb_spad_read(ndev, MW0_SZ_LOW + (i * 2));
val64 |= val;
dev_dbg(&pdev->dev, "Remote MW%d size = %#llx\n", i, val64);
/* query remote spad for qp ready bits */
ntb_peer_spad_read(nt->ndev, QP_LINKS);
- dev_dbg(&pdev->dev, "Remote QP link status = %x\n", val);
+ dev_dbg_ratelimited(&pdev->dev, "Remote QP link status = %x\n", val);
/* See if the remote side is up */
if (val & BIT(qp->qp_num)) {
if (qp->event_handler)
qp->event_handler(qp->cb_data, qp->link_is_up);
+
+ tasklet_schedule(&qp->rxc_db_work);
} else if (nt->link_is_up)
schedule_delayed_work(&qp->link_work,
msecs_to_jiffies(NTB_LINK_DOWN_TIMEOUT));
qp->qp_num = qp_num;
qp->transport = nt;
qp->ndev = nt->ndev;
- qp->link_is_up = false;
qp->client_ready = false;
qp->event_handler = NULL;
+ ntb_qp_link_down_reset(qp);
if (qp_count % mw_count && mw_num + 1 < qp_count / mw_count)
num_qps_mw = qp_count / mw_count + 1;
qp->tx_max_frame = min(transport_mtu, tx_size / 2);
qp->tx_max_entry = tx_size / qp->tx_max_frame;
- if (nt_debugfs_dir) {
+ if (nt->debugfs_node_dir) {
char debugfs_name[4];
snprintf(debugfs_name, 4, "qp%d", qp_num);
qp->debugfs_dir = debugfs_create_dir(debugfs_name,
- nt_debugfs_dir);
+ nt->debugfs_node_dir);
qp->debugfs_stats = debugfs_create_file("stats", S_IRUSR,
qp->debugfs_dir, qp,
INIT_DELAYED_WORK(&qp->link_work, ntb_qp_link_work);
INIT_WORK(&qp->link_cleanup, ntb_qp_link_cleanup_work);
- spin_lock_init(&qp->ntb_rx_pend_q_lock);
- spin_lock_init(&qp->ntb_rx_free_q_lock);
+ spin_lock_init(&qp->ntb_rx_q_lock);
spin_lock_init(&qp->ntb_tx_free_q_lock);
+ INIT_LIST_HEAD(&qp->rx_post_q);
INIT_LIST_HEAD(&qp->rx_pend_q);
INIT_LIST_HEAD(&qp->rx_free_q);
INIT_LIST_HEAD(&qp->tx_free_q);
struct ntb_transport_mw *mw;
unsigned int mw_count, qp_count;
u64 qp_bitmap;
+ int node;
int rc, i;
if (ntb_db_is_unsafe(ndev))
dev_dbg(&ndev->dev,
"scratchpad is unsafe, proceed anyway...\n");
- nt = kzalloc(sizeof(*nt), GFP_KERNEL);
+ node = dev_to_node(&ndev->dev);
+
+ nt = kzalloc_node(sizeof(*nt), GFP_KERNEL, node);
if (!nt)
return -ENOMEM;
nt->mw_count = mw_count;
- nt->mw_vec = kcalloc(mw_count, sizeof(*nt->mw_vec), GFP_KERNEL);
+ nt->mw_vec = kzalloc_node(mw_count * sizeof(*nt->mw_vec),
+ GFP_KERNEL, node);
if (!nt->mw_vec) {
rc = -ENOMEM;
goto err;
if (rc)
goto err1;
- mw->vbase = ioremap(mw->phys_addr, mw->phys_size);
+ mw->vbase = ioremap_wc(mw->phys_addr, mw->phys_size);
if (!mw->vbase) {
rc = -ENOMEM;
goto err1;
nt->qp_bitmap = qp_bitmap;
nt->qp_bitmap_free = qp_bitmap;
- nt->qp_vec = kcalloc(qp_count, sizeof(*nt->qp_vec), GFP_KERNEL);
+ nt->qp_vec = kzalloc_node(qp_count * sizeof(*nt->qp_vec),
+ GFP_KERNEL, node);
if (!nt->qp_vec) {
rc = -ENOMEM;
goto err2;
}
+ if (nt_debugfs_dir) {
+ nt->debugfs_node_dir =
+ debugfs_create_dir(pci_name(ndev->pdev),
+ nt_debugfs_dir);
+ }
+
for (i = 0; i < qp_count; i++) {
rc = ntb_transport_init_queue(nt, i);
if (rc)
kfree(nt);
}
-static void ntb_rx_copy_callback(void *data)
+static void ntb_complete_rxc(struct ntb_transport_qp *qp)
{
- struct ntb_queue_entry *entry = data;
- struct ntb_transport_qp *qp = entry->qp;
- void *cb_data = entry->cb_data;
- unsigned int len = entry->len;
- struct ntb_payload_header *hdr = entry->rx_hdr;
+ struct ntb_queue_entry *entry;
+ void *cb_data;
+ unsigned int len;
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&qp->ntb_rx_q_lock, irqflags);
- hdr->flags = 0;
+ while (!list_empty(&qp->rx_post_q)) {
+ entry = list_first_entry(&qp->rx_post_q,
+ struct ntb_queue_entry, entry);
+ if (!(entry->flags & DESC_DONE_FLAG))
+ break;
- iowrite32(entry->index, &qp->rx_info->entry);
+ entry->rx_hdr->flags = 0;
+ iowrite32(entry->index, &qp->rx_info->entry);
- ntb_list_add(&qp->ntb_rx_free_q_lock, &entry->entry, &qp->rx_free_q);
+ cb_data = entry->cb_data;
+ len = entry->len;
- if (qp->rx_handler && qp->client_ready)
- qp->rx_handler(qp, qp->cb_data, cb_data, len);
+ list_move_tail(&entry->entry, &qp->rx_free_q);
+
+ spin_unlock_irqrestore(&qp->ntb_rx_q_lock, irqflags);
+
+ if (qp->rx_handler && qp->client_ready)
+ qp->rx_handler(qp, qp->cb_data, cb_data, len);
+
+ spin_lock_irqsave(&qp->ntb_rx_q_lock, irqflags);
+ }
+
+ spin_unlock_irqrestore(&qp->ntb_rx_q_lock, irqflags);
+}
+
+static void ntb_rx_copy_callback(void *data)
+{
+ struct ntb_queue_entry *entry = data;
+
+ entry->flags |= DESC_DONE_FLAG;
+
+ ntb_complete_rxc(entry->qp);
}
static void ntb_memcpy_rx(struct ntb_queue_entry *entry, void *offset)
ntb_rx_copy_callback(entry);
}
-static void ntb_async_rx(struct ntb_queue_entry *entry, void *offset,
- size_t len)
+static void ntb_async_rx(struct ntb_queue_entry *entry, void *offset)
{
struct dma_async_tx_descriptor *txd;
struct ntb_transport_qp *qp = entry->qp;
struct dma_chan *chan = qp->dma_chan;
struct dma_device *device;
- size_t pay_off, buff_off;
+ size_t pay_off, buff_off, len;
struct dmaengine_unmap_data *unmap;
dma_cookie_t cookie;
void *buf = entry->buf;
- entry->len = len;
+ len = entry->len;
if (!chan)
goto err;
struct ntb_payload_header *hdr;
struct ntb_queue_entry *entry;
void *offset;
- int rc;
offset = qp->rx_buff + qp->rx_max_frame * qp->rx_index;
hdr = offset + qp->rx_max_frame - sizeof(struct ntb_payload_header);
dev_dbg(&qp->ndev->pdev->dev, "link down flag set\n");
ntb_qp_link_down(qp);
hdr->flags = 0;
- iowrite32(qp->rx_index, &qp->rx_info->entry);
- return 0;
+ return -EAGAIN;
}
if (hdr->ver != (u32)qp->rx_pkts) {
return -EIO;
}
- entry = ntb_list_rm(&qp->ntb_rx_pend_q_lock, &qp->rx_pend_q);
+ entry = ntb_list_mv(&qp->ntb_rx_q_lock, &qp->rx_pend_q, &qp->rx_post_q);
if (!entry) {
dev_dbg(&qp->ndev->pdev->dev, "no receive buffer\n");
qp->rx_err_no_buf++;
-
- rc = -ENOMEM;
- goto err;
+ return -EAGAIN;
}
+ entry->rx_hdr = hdr;
+ entry->index = qp->rx_index;
+
if (hdr->len > entry->len) {
dev_dbg(&qp->ndev->pdev->dev,
"receive buffer overflow! Wanted %d got %d\n",
hdr->len, entry->len);
qp->rx_err_oflow++;
- rc = -EIO;
- goto err;
- }
+ entry->len = -EIO;
+ entry->flags |= DESC_DONE_FLAG;
- dev_dbg(&qp->ndev->pdev->dev,
- "RX OK index %u ver %u size %d into buf size %d\n",
- qp->rx_index, hdr->ver, hdr->len, entry->len);
+ ntb_complete_rxc(qp);
+ } else {
+ dev_dbg(&qp->ndev->pdev->dev,
+ "RX OK index %u ver %u size %d into buf size %d\n",
+ qp->rx_index, hdr->ver, hdr->len, entry->len);
- qp->rx_bytes += hdr->len;
- qp->rx_pkts++;
+ qp->rx_bytes += hdr->len;
+ qp->rx_pkts++;
- entry->index = qp->rx_index;
- entry->rx_hdr = hdr;
+ entry->len = hdr->len;
- ntb_async_rx(entry, offset, hdr->len);
+ ntb_async_rx(entry, offset);
+ }
qp->rx_index++;
qp->rx_index %= qp->rx_max_entry;
return 0;
-
-err:
- /* FIXME: if this syncrhonous update of the rx_index gets ahead of
- * asyncrhonous ntb_rx_copy_callback of previous entry, there are three
- * scenarios:
- *
- * 1) The peer might miss this update, but observe the update
- * from the memcpy completion callback. In this case, the buffer will
- * not be freed on the peer to be reused for a different packet. The
- * successful rx of a later packet would clear the condition, but the
- * condition could persist if several rx fail in a row.
- *
- * 2) The peer may observe this update before the asyncrhonous copy of
- * prior packets is completed. The peer may overwrite the buffers of
- * the prior packets before they are copied.
- *
- * 3) Both: the peer may observe the update, and then observe the index
- * decrement by the asynchronous completion callback. Who knows what
- * badness that will cause.
- */
- hdr->flags = 0;
- iowrite32(qp->rx_index, &qp->rx_info->entry);
-
- return rc;
}
static void ntb_transport_rxc_db(unsigned long data)
break;
}
- if (qp->dma_chan)
+ if (i && qp->dma_chan)
dma_async_issue_pending(qp->dma_chan);
if (i == qp->rx_max_entry) {
static void ntb_memcpy_tx(struct ntb_queue_entry *entry, void __iomem *offset)
{
+#ifdef ARCH_HAS_NOCACHE_UACCESS
+ /*
+ * Using non-temporal mov to improve performance on non-cached
+ * writes, even though we aren't actually copying from user space.
+ */
+ __copy_from_user_inatomic_nocache(offset, entry->buf, entry->len);
+#else
memcpy_toio(offset, entry->buf, entry->len);
+#endif
/* Ensure that the data is fully copied out before setting the flags */
wmb();
if (!qp->link_is_up)
return;
- qp->link_is_up = false;
- dev_info(&pdev->dev, "qp %d: Link Down\n", qp->qp_num);
+ dev_info(&pdev->dev, "qp %d: Send Link Down\n", qp->qp_num);
for (i = 0; i < NTB_LINK_DOWN_TIMEOUT; i++) {
entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q);
if (rc)
dev_err(&pdev->dev, "ntb: QP%d unable to send linkdown msg\n",
qp->qp_num);
+
+ ntb_qp_link_down_reset(qp);
+}
+
+static bool ntb_dma_filter_fn(struct dma_chan *chan, void *node)
+{
+ return dev_to_node(&chan->dev->device) == (int)(unsigned long)node;
}
/**
struct ntb_transport_qp *qp;
u64 qp_bit;
unsigned int free_queue;
+ dma_cap_mask_t dma_mask;
+ int node;
int i;
ndev = dev_ntb(client_dev->parent);
pdev = ndev->pdev;
nt = ndev->ctx;
+ node = dev_to_node(&ndev->dev);
+
free_queue = ffs(nt->qp_bitmap);
if (!free_queue)
goto err;
qp->tx_handler = handlers->tx_handler;
qp->event_handler = handlers->event_handler;
- dmaengine_get();
- qp->dma_chan = dma_find_channel(DMA_MEMCPY);
- if (!qp->dma_chan) {
- dmaengine_put();
- dev_info(&pdev->dev, "Unable to allocate DMA channel, using CPU instead\n");
+ dma_cap_zero(dma_mask);
+ dma_cap_set(DMA_MEMCPY, dma_mask);
+
+ if (use_dma) {
+ qp->dma_chan = dma_request_channel(dma_mask, ntb_dma_filter_fn,
+ (void *)(unsigned long)node);
+ if (!qp->dma_chan)
+ dev_info(&pdev->dev, "Unable to allocate DMA channel\n");
+ } else {
+ qp->dma_chan = NULL;
}
+ dev_dbg(&pdev->dev, "Using %s memcpy\n", qp->dma_chan ? "DMA" : "CPU");
for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) {
- entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+ entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
if (!entry)
goto err1;
entry->qp = qp;
- ntb_list_add(&qp->ntb_rx_free_q_lock, &entry->entry,
+ ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry,
&qp->rx_free_q);
}
for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) {
- entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+ entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node);
if (!entry)
goto err2;
while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q)))
kfree(entry);
err1:
- while ((entry = ntb_list_rm(&qp->ntb_rx_free_q_lock, &qp->rx_free_q)))
+ while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q)))
kfree(entry);
if (qp->dma_chan)
- dmaengine_put();
+ dma_release_channel(qp->dma_chan);
nt->qp_bitmap_free |= qp_bit;
err:
return NULL;
*/
void ntb_transport_free_queue(struct ntb_transport_qp *qp)
{
- struct ntb_transport_ctx *nt = qp->transport;
struct pci_dev *pdev;
struct ntb_queue_entry *entry;
u64 qp_bit;
*/
dma_sync_wait(chan, qp->last_cookie);
dmaengine_terminate_all(chan);
- dmaengine_put();
+ dma_release_channel(chan);
}
qp_bit = BIT_ULL(qp->qp_num);
qp->tx_handler = NULL;
qp->event_handler = NULL;
- while ((entry = ntb_list_rm(&qp->ntb_rx_free_q_lock, &qp->rx_free_q)))
+ while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q)))
kfree(entry);
- while ((entry = ntb_list_rm(&qp->ntb_rx_pend_q_lock, &qp->rx_pend_q))) {
- dev_warn(&pdev->dev, "Freeing item from a non-empty queue\n");
+ while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q))) {
+ dev_warn(&pdev->dev, "Freeing item from non-empty rx_pend_q\n");
+ kfree(entry);
+ }
+
+ while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_post_q))) {
+ dev_warn(&pdev->dev, "Freeing item from non-empty rx_post_q\n");
kfree(entry);
}
while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q)))
kfree(entry);
- nt->qp_bitmap_free |= qp_bit;
+ qp->transport->qp_bitmap_free |= qp_bit;
dev_info(&pdev->dev, "NTB Transport QP %d freed\n", qp->qp_num);
}
if (!qp || qp->client_ready)
return NULL;
- entry = ntb_list_rm(&qp->ntb_rx_pend_q_lock, &qp->rx_pend_q);
+ entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q);
if (!entry)
return NULL;
buf = entry->cb_data;
*len = entry->len;
- ntb_list_add(&qp->ntb_rx_free_q_lock, &entry->entry, &qp->rx_free_q);
+ ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_free_q);
return buf;
}
if (!qp)
return -EINVAL;
- entry = ntb_list_rm(&qp->ntb_rx_free_q_lock, &qp->rx_free_q);
+ entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q);
if (!entry)
return -ENOMEM;
entry->cb_data = cb;
entry->buf = data;
entry->len = len;
+ entry->flags = 0;
+
+ ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_pend_q);
- ntb_list_add(&qp->ntb_rx_pend_q_lock, &entry->entry, &qp->rx_pend_q);
+ tasklet_schedule(&qp->rxc_db_work);
return 0;
}
{
int rc;
+ pr_info("%s, version %s\n", NTB_TRANSPORT_DESC, NTB_TRANSPORT_VER);
+
if (debugfs_initialized())
nt_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
projects / firefly-linux-kernel-4.4.55.git / blobdiff