microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

kfifo: move out spinlock 

Move the pointer to the spinlock out of struct kfifo.  Most users in
tree do not actually use a spinlock, so the few exceptions now have to
call kfifo_{get,put}_locked, which takes an extra argument to a
spinlock.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Stefani Seibold 2009-12-21 14:37:27 -08:00 коммит произвёл Linus Torvalds
Родитель 4546548789
Коммит c1e13f2567
16 изменённых файлов: 132 добавлений и 131 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

2
drivers/char/nozomi.c
Просмотреть файл

@ -686,7 +686,7 @@ static int nozomi_read_config_table(struct nozomi *dc)
for (i = PORT_MDM; i < MAX_PORT; i++) {
kfifo_alloc(&dc->port[i].fifo_ul,
FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
FIFO_BUFFER_SIZE_UL, GFP_ATOMIC);
memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
}

21
drivers/char/sonypi.c
Просмотреть файл

@ -777,8 +777,9 @@ static void input_keyrelease(struct work_struct *work)
{
struct sonypi_keypress kp;
while (kfifo_get(&sonypi_device.input_fifo, (unsigned char *)&kp,
sizeof(kp)) == sizeof(kp)) {
while (kfifo_get_locked(&sonypi_device.input_fifo, (unsigned char *)&kp,
sizeof(kp), &sonypi_device.input_fifo_lock)
== sizeof(kp)) {
msleep(10);
input_report_key(kp.dev, kp.key, 0);
input_sync(kp.dev);
@ -827,8 +828,9 @@ static void sonypi_report_input_event(u8 event)
if (kp.dev) {
input_report_key(kp.dev, kp.key, 1);
input_sync(kp.dev);
kfifo_put(&sonypi_device.input_fifo,
(unsigned char *)&kp, sizeof(kp));
kfifo_put_locked(&sonypi_device.input_fifo,
(unsigned char *)&kp, sizeof(kp),
&sonypi_device.input_fifo_lock);
schedule_work(&sonypi_device.input_work);
}
}
@ -880,7 +882,8 @@ found:
acpi_bus_generate_proc_event(sonypi_acpi_device, 1, event);
#endif
kfifo_put(&sonypi_device.fifo, (unsigned char *)&event, sizeof(event));
kfifo_put_locked(&sonypi_device.fifo, (unsigned char *)&event,
sizeof(event), &sonypi_device.fifo_lock);
kill_fasync(&sonypi_device.fifo_async, SIGIO, POLL_IN);
wake_up_interruptible(&sonypi_device.fifo_proc_list);
@ -929,7 +932,8 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
return ret;
while (ret < count &&
(kfifo_get(&sonypi_device.fifo, &c, sizeof(c)) == sizeof(c))) {
(kfifo_get_locked(&sonypi_device.fifo, &c, sizeof(c),
&sonypi_device.fifo_lock) == sizeof(c))) {
if (put_user(c, buf++))
return -EFAULT;
ret++;
@ -1313,8 +1317,7 @@ static int __devinit sonypi_probe(struct platform_device *dev)
"http://www.linux.it/~malattia/wiki/index.php/Sony_drivers\n");
spin_lock_init(&sonypi_device.fifo_lock);
error = kfifo_alloc(&sonypi_device.fifo, SONYPI_BUF_SIZE, GFP_KERNEL,
&sonypi_device.fifo_lock);
error = kfifo_alloc(&sonypi_device.fifo, SONYPI_BUF_SIZE, GFP_KERNEL);
if (error) {
printk(KERN_ERR "sonypi: kfifo_alloc failed\n");
return error;
@ -1394,7 +1397,7 @@ static int __devinit sonypi_probe(struct platform_device *dev)
spin_lock_init(&sonypi_device.input_fifo_lock);
error = kfifo_alloc(&sonypi_device.input_fifo, SONYPI_BUF_SIZE,
GFP_KERNEL, &sonypi_device.input_fifo_lock);
GFP_KERNEL);
if (error) {
printk(KERN_ERR "sonypi: kfifo_alloc failed\n");
goto err_inpdev_unregister;

36
drivers/infiniband/hw/cxgb3/cxio_resource.c
Просмотреть файл

@ -55,7 +55,7 @@ static int __cxio_init_resource_fifo(struct kfifo *fifo,
u32 rarray[16];
spin_lock_init(fifo_lock);
if (kfifo_alloc(fifo, nr * sizeof(u32), GFP_KERNEL, fifo_lock))
if (kfifo_alloc(fifo, nr * sizeof(u32), GFP_KERNEL))
return -ENOMEM;
for (i = 0; i < skip_low + skip_high; i++)
@ -86,7 +86,8 @@ static int __cxio_init_resource_fifo(struct kfifo *fifo,
__kfifo_put(fifo, (unsigned char *) &i, sizeof(u32));
for (i = 0; i < skip_low + skip_high; i++)
kfifo_get(fifo, (unsigned char *) &entry, sizeof(u32));
kfifo_get_locked(fifo, (unsigned char *) &entry,
sizeof(u32), fifo_lock);
return 0;
}
@ -113,8 +114,7 @@ static int cxio_init_qpid_fifo(struct cxio_rdev *rdev_p)
spin_lock_init(&rdev_p->rscp->qpid_fifo_lock);
if (kfifo_alloc(&rdev_p->rscp->qpid_fifo, T3_MAX_NUM_QP * sizeof(u32),
GFP_KERNEL,
&rdev_p->rscp->qpid_fifo_lock))
GFP_KERNEL))
return -ENOMEM;
for (i = 16; i < T3_MAX_NUM_QP; i++)
@ -177,33 +177,37 @@ tpt_err:
/*
* returns 0 if no resource available
*/
static u32 cxio_hal_get_resource(struct kfifo *fifo)
static u32 cxio_hal_get_resource(struct kfifo *fifo, spinlock_t * lock)
{
u32 entry;
if (kfifo_get(fifo, (unsigned char *) &entry, sizeof(u32)))
if (kfifo_get_locked(fifo, (unsigned char *) &entry, sizeof(u32), lock))
return entry;
else
return 0; /* fifo emptry */
}
static void cxio_hal_put_resource(struct kfifo *fifo, u32 entry)
static void cxio_hal_put_resource(struct kfifo *fifo, spinlock_t * lock,
u32 entry)
{
BUG_ON(kfifo_put(fifo, (unsigned char *) &entry, sizeof(u32)) == 0);
BUG_ON(
kfifo_put_locked(fifo, (unsigned char *) &entry, sizeof(u32), lock)
== 0);
}
u32 cxio_hal_get_stag(struct cxio_hal_resource *rscp)
{
return cxio_hal_get_resource(&rscp->tpt_fifo);
return cxio_hal_get_resource(&rscp->tpt_fifo, &rscp->tpt_fifo_lock);
}
void cxio_hal_put_stag(struct cxio_hal_resource *rscp, u32 stag)
{
cxio_hal_put_resource(&rscp->tpt_fifo, stag);
cxio_hal_put_resource(&rscp->tpt_fifo, &rscp->tpt_fifo_lock, stag);
}
u32 cxio_hal_get_qpid(struct cxio_hal_resource *rscp)
{
u32 qpid = cxio_hal_get_resource(&rscp->qpid_fifo);
u32 qpid = cxio_hal_get_resource(&rscp->qpid_fifo,
&rscp->qpid_fifo_lock);
PDBG("%s qpid 0x%x\n", __func__, qpid);
return qpid;
}
@ -211,27 +215,27 @@ u32 cxio_hal_get_qpid(struct cxio_hal_resource *rscp)
void cxio_hal_put_qpid(struct cxio_hal_resource *rscp, u32 qpid)
{
PDBG("%s qpid 0x%x\n", __func__, qpid);
cxio_hal_put_resource(&rscp->qpid_fifo, qpid);
cxio_hal_put_resource(&rscp->qpid_fifo, &rscp->qpid_fifo_lock, qpid);
}
u32 cxio_hal_get_cqid(struct cxio_hal_resource *rscp)
{
return cxio_hal_get_resource(&rscp->cqid_fifo);
return cxio_hal_get_resource(&rscp->cqid_fifo, &rscp->cqid_fifo_lock);
}
void cxio_hal_put_cqid(struct cxio_hal_resource *rscp, u32 cqid)
{
cxio_hal_put_resource(&rscp->cqid_fifo, cqid);
cxio_hal_put_resource(&rscp->cqid_fifo, &rscp->cqid_fifo_lock, cqid);
}
u32 cxio_hal_get_pdid(struct cxio_hal_resource *rscp)
{
return cxio_hal_get_resource(&rscp->pdid_fifo);
return cxio_hal_get_resource(&rscp->pdid_fifo, &rscp->pdid_fifo_lock);
}
void cxio_hal_put_pdid(struct cxio_hal_resource *rscp, u32 pdid)
{
cxio_hal_put_resource(&rscp->pdid_fifo, pdid);
cxio_hal_put_resource(&rscp->pdid_fifo, &rscp->pdid_fifo_lock, pdid);
}
void cxio_hal_destroy_resource(struct cxio_hal_resource *rscp)

35
drivers/media/video/meye.c
Просмотреть файл

@ -800,8 +800,8 @@ again:
return IRQ_HANDLED;
if (meye.mchip_mode == MCHIP_HIC_MODE_CONT_OUT) {
if (kfifo_get(&meye.grabq, (unsigned char *)&reqnr,
sizeof(int)) != sizeof(int)) {
if (kfifo_get_locked(&meye.grabq, (unsigned char *)&reqnr,
sizeof(int), &meye.grabq_lock) != sizeof(int)) {
mchip_free_frame();
return IRQ_HANDLED;
}
@ -811,7 +811,8 @@ again:
meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
meye.grab_buffer[reqnr].sequence = sequence++;
kfifo_put(&meye.doneq, (unsigned char *)&reqnr, sizeof(int));
kfifo_put_locked(&meye.doneq, (unsigned char *)&reqnr,
sizeof(int), &meye.doneq_lock);
wake_up_interruptible(&meye.proc_list);
} else {
int size;
@ -820,8 +821,8 @@ again:
mchip_free_frame();
goto again;
}
if (kfifo_get(&meye.grabq, (unsigned char *)&reqnr,
sizeof(int)) != sizeof(int)) {
if (kfifo_get_locked(&meye.grabq, (unsigned char *)&reqnr,
sizeof(int), &meye.grabq_lock) != sizeof(int)) {
mchip_free_frame();
goto again;
}
@ -831,7 +832,8 @@ again:
meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
meye.grab_buffer[reqnr].sequence = sequence++;
kfifo_put(&meye.doneq, (unsigned char *)&reqnr, sizeof(int));
kfifo_put_locked(&meye.doneq, (unsigned char *)&reqnr,
sizeof(int), &meye.doneq_lock);
wake_up_interruptible(&meye.proc_list);
}
mchip_free_frame();
@ -933,7 +935,8 @@ static int meyeioc_qbuf_capt(int *nb)
mchip_cont_compression_start();
meye.grab_buffer[*nb].state = MEYE_BUF_USING;
kfifo_put(&meye.grabq, (unsigned char *)nb, sizeof(int));
kfifo_put_locked(&meye.grabq, (unsigned char *)nb, sizeof(int),
&meye.grabq_lock);
mutex_unlock(&meye.lock);
return 0;
@ -965,7 +968,8 @@ static int meyeioc_sync(struct file *file, void *fh, int *i)
/* fall through */
case MEYE_BUF_DONE:
meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
kfifo_get(&meye.doneq, (unsigned char *)&unused, sizeof(int));
kfifo_get_locked(&meye.doneq, (unsigned char *)&unused,
sizeof(int), &meye.doneq_lock);
}
*i = meye.grab_buffer[*i].size;
mutex_unlock(&meye.lock);
@ -1452,7 +1456,8 @@ static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
buf->flags |= V4L2_BUF_FLAG_QUEUED;
buf->flags &= ~V4L2_BUF_FLAG_DONE;
meye.grab_buffer[buf->index].state = MEYE_BUF_USING;
kfifo_put(&meye.grabq, (unsigned char *)&buf->index, sizeof(int));
kfifo_put_locked(&meye.grabq, (unsigned char *)&buf->index,
sizeof(int), &meye.grabq_lock);
mutex_unlock(&meye.lock);
return 0;
@ -1478,8 +1483,8 @@ static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
return -EINTR;
}
if (!kfifo_get(&meye.doneq, (unsigned char *)&reqnr,
sizeof(int))) {
if (!kfifo_get_locked(&meye.doneq, (unsigned char *)&reqnr,
sizeof(int), &meye.doneq_lock)) {
mutex_unlock(&meye.lock);
return -EBUSY;
}
@ -1745,14 +1750,14 @@ static int __devinit meye_probe(struct pci_dev *pcidev,
}
spin_lock_init(&meye.grabq_lock);
if (kfifo_alloc(&meye.grabq, sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
&meye.grabq_lock)) {
if (kfifo_alloc(&meye.grabq, sizeof(int) * MEYE_MAX_BUFNBRS,
GFP_KERNEL)) {
printk(KERN_ERR "meye: fifo allocation failed\n");
goto outkfifoalloc1;
}
spin_lock_init(&meye.doneq_lock);
if (kfifo_alloc(&meye.doneq, sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
&meye.doneq_lock)) {
if (kfifo_alloc(&meye.doneq, sizeof(int) * MEYE_MAX_BUFNBRS,
GFP_KERNEL)) {
printk(KERN_ERR "meye: fifo allocation failed\n");
goto outkfifoalloc2;
}

2
drivers/net/wireless/libertas/main.c
Просмотреть файл

@ -883,7 +883,7 @@ static int lbs_init_adapter(struct lbs_private *priv)
priv->resp_len[0] = priv->resp_len[1] = 0;
/* Create the event FIFO */
ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL, NULL);
ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
if (ret) {
lbs_pr_err("Out of memory allocating event FIFO buffer\n");
goto out;

18
drivers/platform/x86/fujitsu-laptop.c
Просмотреть файл

@ -825,7 +825,7 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
/* kfifo */
spin_lock_init(&fujitsu_hotkey->fifo_lock);
error = kfifo_alloc(&fujitsu_hotkey->fifo, RINGBUFFERSIZE * sizeof(int),
GFP_KERNEL, &fujitsu_hotkey->fifo_lock);
GFP_KERNEL);
if (error) {
printk(KERN_ERR "kfifo_alloc failed\n");
goto err_stop;
@ -1006,9 +1006,10 @@ static void acpi_fujitsu_hotkey_notify(struct acpi_device *device, u32 event)
vdbg_printk(FUJLAPTOP_DBG_TRACE,
"Push keycode into ringbuffer [%d]\n",
keycode);
status = kfifo_put(&fujitsu_hotkey->fifo,
status = kfifo_put_locked(&fujitsu_hotkey->fifo,
(unsigned char *)&keycode,
sizeof(keycode));
sizeof(keycode),
&fujitsu_hotkey->fifo_lock);
if (status != sizeof(keycode)) {
vdbg_printk(FUJLAPTOP_DBG_WARN,
"Could not push keycode [0x%x]\n",
@ -1019,11 +1020,12 @@ static void acpi_fujitsu_hotkey_notify(struct acpi_device *device, u32 event)
}
} else if (keycode == 0) {
while ((status =
kfifo_get
(&fujitsu_hotkey->fifo, (unsigned char *)
&keycode_r,
sizeof
(keycode_r))) == sizeof(keycode_r)) {
kfifo_get_locked(
&fujitsu_hotkey->fifo,
(unsigned char *) &keycode_r,
sizeof(keycode_r),
&fujitsu_hotkey->fifo_lock))
== sizeof(keycode_r)) {
input_report_key(input, keycode_r, 0);
input_sync(input);
vdbg_printk(FUJLAPTOP_DBG_TRACE,

22
drivers/platform/x86/sony-laptop.c
Просмотреть файл

@ -300,8 +300,9 @@ static void do_sony_laptop_release_key(struct work_struct *work)
{
struct sony_laptop_keypress kp;
while (kfifo_get(&sony_laptop_input.fifo, (unsigned char *)&kp,
sizeof(kp)) == sizeof(kp)) {
while (kfifo_get_locked(&sony_laptop_input.fifo, (unsigned char *)&kp,
sizeof(kp), &sony_laptop_input.fifo_lock)
== sizeof(kp)) {
msleep(10);
input_report_key(kp.dev, kp.key, 0);
input_sync(kp.dev);
@ -362,8 +363,9 @@ static void sony_laptop_report_input_event(u8 event)
/* we emit the scancode so we can always remap the key */
input_event(kp.dev, EV_MSC, MSC_SCAN, event);
input_sync(kp.dev);
kfifo_put(&sony_laptop_input.fifo,
(unsigned char *)&kp, sizeof(kp));
kfifo_put_locked(&sony_laptop_input.fifo,
(unsigned char *)&kp, sizeof(kp),
&sony_laptop_input.fifo_lock);
if (!work_pending(&sony_laptop_release_key_work))
queue_work(sony_laptop_input.wq,
@ -386,8 +388,7 @@ static int sony_laptop_setup_input(struct acpi_device *acpi_device)
/* kfifo */
spin_lock_init(&sony_laptop_input.fifo_lock);
error =
kfifo_alloc(&sony_laptop_input.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
&sony_laptop_input.fifo_lock);
kfifo_alloc(&sony_laptop_input.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL);
if (error) {
printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
goto err_dec_users;
@ -2129,7 +2130,8 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
return ret;
while (ret < count &&
(kfifo_get(&sonypi_compat.fifo, &c, sizeof(c)) == sizeof(c))) {
(kfifo_get_locked(&sonypi_compat.fifo, &c, sizeof(c),
&sonypi_compat.fifo_lock) == sizeof(c))) {
if (put_user(c, buf++))
return -EFAULT;
ret++;
@ -2308,7 +2310,8 @@ static struct miscdevice sonypi_misc_device = {
static void sonypi_compat_report_event(u8 event)
{
kfifo_put(&sonypi_compat.fifo, (unsigned char *)&event, sizeof(event));
kfifo_put_locked(&sonypi_compat.fifo, (unsigned char *)&event,
sizeof(event), &sonypi_compat.fifo_lock);
kill_fasync(&sonypi_compat.fifo_async, SIGIO, POLL_IN);
wake_up_interruptible(&sonypi_compat.fifo_proc_list);
}
@ -2319,8 +2322,7 @@ static int sonypi_compat_init(void)
spin_lock_init(&sonypi_compat.fifo_lock);
error =
kfifo_alloc(&sonypi_compat.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
&sonypi_compat.fifo_lock);
kfifo_alloc(&sonypi_compat.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL);
if (error) {
printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
return error;

2
drivers/scsi/libiscsi.c
Просмотреть файл

@ -2461,7 +2461,7 @@ iscsi_pool_init(struct iscsi_pool *q, int max, void ***items, int item_size)
if (q->pool == NULL)
return -ENOMEM;
kfifo_init(&q->queue, (void*)q->pool, max * sizeof(void*), NULL);
kfifo_init(&q->queue, (void*)q->pool, max * sizeof(void*));
for (i = 0; i < max; i++) {
q->pool[i] = kzalloc(item_size, GFP_KERNEL);

2
drivers/scsi/libiscsi_tcp.c
Просмотреть файл

@ -1128,7 +1128,7 @@ int iscsi_tcp_r2tpool_alloc(struct iscsi_session *session)
/* R2T xmit queue */
if (kfifo_alloc(&tcp_task->r2tqueue,
session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL)) {
session->max_r2t * 4 * sizeof(void*), GFP_KERNEL)) {
iscsi_pool_free(&tcp_task->r2tpool);
goto r2t_alloc_fail;
}

9
drivers/scsi/libsrp.c
Просмотреть файл

@ -58,8 +58,7 @@ static int srp_iu_pool_alloc(struct srp_queue *q, size_t max,
goto free_pool;
spin_lock_init(&q->lock);
kfifo_init(&q->queue, (void *) q->pool, max * sizeof(void *),
&q->lock);
kfifo_init(&q->queue, (void *) q->pool, max * sizeof(void *));
for (i = 0, iue = q->items; i < max; i++) {
__kfifo_put(&q->queue, (void *) &iue, sizeof(void *));
@ -164,7 +163,8 @@ struct iu_entry *srp_iu_get(struct srp_target *target)
{
struct iu_entry *iue = NULL;
kfifo_get(&target->iu_queue.queue, (void *) &iue, sizeof(void *));
kfifo_get_locked(&target->iu_queue.queue, (void *) &iue,
sizeof(void *), &target->iu_queue.lock);
if (!iue)
return iue;
iue->target = target;
@ -176,7 +176,8 @@ EXPORT_SYMBOL_GPL(srp_iu_get);
void srp_iu_put(struct iu_entry *iue)
{
kfifo_put(&iue->target->iu_queue.queue, (void *) &iue, sizeof(void *));
kfifo_put_locked(&iue->target->iu_queue.queue, (void *) &iue,
sizeof(void *), &iue->target->iu_queue.lock);
}
EXPORT_SYMBOL_GPL(srp_iu_put);

2
drivers/usb/host/fhci.h
Просмотреть файл

@ -495,7 +495,7 @@ static inline struct usb_hcd *fhci_to_hcd(struct fhci_hcd *fhci)
/* fifo of pointers */
static inline int cq_new(struct kfifo *fifo, int size)
{
return kfifo_alloc(fifo, size * sizeof(void *), GFP_KERNEL, NULL);
return kfifo_alloc(fifo, size * sizeof(void *), GFP_KERNEL);
}
static inline void cq_delete(struct kfifo *kfifo)

4
drivers/usb/serial/generic.c
Просмотреть файл

@ -285,7 +285,7 @@ static int usb_serial_generic_write_start(struct usb_serial_port *port)
return 0;
data = port->write_urb->transfer_buffer;
count = kfifo_get(port->write_fifo, data, port->bulk_out_size);
count = kfifo_get_locked(port->write_fifo, data, port->bulk_out_size, &port->lock);
usb_serial_debug_data(debug, &port->dev, __func__, count, data);
/* set up our urb */
@ -345,7 +345,7 @@ int usb_serial_generic_write(struct tty_struct *tty,
return usb_serial_multi_urb_write(tty, port,
buf, count);
count = kfifo_put(port->write_fifo, buf, count);
count = kfifo_put_locked(port->write_fifo, buf, count, &port->lock);
result = usb_serial_generic_write_start(port);
if (result >= 0)

3
drivers/usb/serial/usb-serial.c
Просмотреть файл

@ -939,8 +939,7 @@ int usb_serial_probe(struct usb_interface *interface,
dev_err(&interface->dev, "No free urbs available\n");
goto probe_error;
}
if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL,
&port->lock))
if (kfifo_alloc(port->write_fifo, PAGE_SIZE, GFP_KERNEL))
goto probe_error;
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
port->bulk_out_size = buffer_size;

82
include/linux/kfifo.h
Просмотреть файл

@ -30,13 +30,12 @@ struct kfifo {
unsigned int size; /* the size of the allocated buffer */
unsigned int in; /* data is added at offset (in % size) */
unsigned int out; /* data is extracted from off. (out % size) */
spinlock_t *lock; /* protects concurrent modifications */
};
extern void kfifo_init(struct kfifo *fifo, unsigned char *buffer,
unsigned int size, spinlock_t *lock);
unsigned int size);
extern __must_check int kfifo_alloc(struct kfifo *fifo, unsigned int size,
gfp_t gfp_mask, spinlock_t *lock);
gfp_t gfp_mask);
extern void kfifo_free(struct kfifo *fifo);
extern unsigned int __kfifo_put(struct kfifo *fifo,
const unsigned char *buffer, unsigned int len);
@ -58,58 +57,67 @@ static inline void __kfifo_reset(struct kfifo *fifo)
*/
static inline void kfifo_reset(struct kfifo *fifo)
{
unsigned long flags;
spin_lock_irqsave(fifo->lock, flags);
__kfifo_reset(fifo);
spin_unlock_irqrestore(fifo->lock, flags);
}
/**
* kfifo_put - puts some data into the FIFO
* __kfifo_len - returns the number of bytes available in the FIFO
* @fifo: the fifo to be used.
* @buffer: the data to be added.
* @len: the length of the data to be added.
*/
static inline unsigned int __kfifo_len(struct kfifo *fifo)
{
register unsigned int out;
out = fifo->out;
smp_rmb();
return fifo->in - out;
}
/**
* kfifo_put_locked - puts some data into the FIFO using a spinlock for locking
* @fifo: the fifo to be used.
* @from: the data to be added.
* @n: the length of the data to be added.
* @lock: pointer to the spinlock to use for locking.
*
* This function copies at most @len bytes from the @buffer into
* This function copies at most @len bytes from the @from buffer into
* the FIFO depending on the free space, and returns the number of
* bytes copied.
*/
static inline unsigned int kfifo_put(struct kfifo *fifo,
const unsigned char *buffer, unsigned int len)
static inline __must_check unsigned int kfifo_put_locked(struct kfifo *fifo,
const unsigned char *from, unsigned int n, spinlock_t *lock)
{
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(fifo->lock, flags);
spin_lock_irqsave(lock, flags);
ret = __kfifo_put(fifo, buffer, len);
ret = __kfifo_put(fifo, from, n);
spin_unlock_irqrestore(fifo->lock, flags);
spin_unlock_irqrestore(lock, flags);
return ret;
}
/**
* kfifo_get - gets some data from the FIFO
* kfifo_get_locked - gets some data from the FIFO using a spinlock for locking
* @fifo: the fifo to be used.
* @buffer: where the data must be copied.
* @len: the size of the destination buffer.
* @to: where the data must be copied.
* @n: the size of the destination buffer.
* @lock: pointer to the spinlock to use for locking.
*
* This function copies at most @len bytes from the FIFO into the
* @buffer and returns the number of copied bytes.
* @to buffer and returns the number of copied bytes.
*/
static inline unsigned int kfifo_get(struct kfifo *fifo,
unsigned char *buffer, unsigned int len)
static inline __must_check unsigned int kfifo_get_locked(struct kfifo *fifo,
unsigned char *to, unsigned int n, spinlock_t *lock)
{
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(fifo->lock, flags);
spin_lock_irqsave(lock, flags);
ret = __kfifo_get(fifo, buffer, len);
ret = __kfifo_get(fifo, to, n);
/*
* optimization: if the FIFO is empty, set the indices to 0
@ -118,36 +126,18 @@ static inline unsigned int kfifo_get(struct kfifo *fifo,
if (fifo->in == fifo->out)
fifo->in = fifo->out = 0;
spin_unlock_irqrestore(fifo->lock, flags);
spin_unlock_irqrestore(lock, flags);
return ret;
}
/**
* __kfifo_len - returns the number of bytes available in the FIFO, no locking version
* @fifo: the fifo to be used.
*/
static inline unsigned int __kfifo_len(struct kfifo *fifo)
{
return fifo->in - fifo->out;
}
/**
* kfifo_len - returns the number of bytes available in the FIFO
* @fifo: the fifo to be used.
*/
static inline unsigned int kfifo_len(struct kfifo *fifo)
{
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(fifo->lock, flags);
ret = __kfifo_len(fifo);
spin_unlock_irqrestore(fifo->lock, flags);
return ret;
return __kfifo_len(fifo);
}
#endif

17
kernel/kfifo.c
Просмотреть файл

@ -28,11 +28,10 @@
#include <linux/log2.h>
static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
unsigned int size, spinlock_t *lock)
unsigned int size)
{
fifo->buffer = buffer;
fifo->size = size;
fifo->lock = lock;
kfifo_reset(fifo);
}
@ -42,16 +41,14 @@ static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
* @fifo: the fifo to assign the buffer
* @buffer: the preallocated buffer to be used.
* @size: the size of the internal buffer, this have to be a power of 2.
* @lock: the lock to be used to protect the fifo buffer
*
*/
void kfifo_init(struct kfifo *fifo, unsigned char *buffer, unsigned int size,
spinlock_t *lock)
void kfifo_init(struct kfifo *fifo, unsigned char *buffer, unsigned int size)
{
/* size must be a power of 2 */
BUG_ON(!is_power_of_2(size));
_kfifo_init(fifo, buffer, size, lock);
_kfifo_init(fifo, buffer, size);
}
EXPORT_SYMBOL(kfifo_init);
@ -60,7 +57,6 @@ EXPORT_SYMBOL(kfifo_init);
* @fifo: the fifo to assign then new buffer
* @size: the size of the buffer to be allocated, this have to be a power of 2.
* @gfp_mask: get_free_pages mask, passed to kmalloc()
* @lock: the lock to be used to protect the fifo buffer
*
* This function dynamically allocates a new fifo internal buffer
*
@ -68,8 +64,7 @@ EXPORT_SYMBOL(kfifo_init);
* The buffer will be release with kfifo_free().
* Return 0 if no error, otherwise the an error code
*/
int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask,
spinlock_t *lock)
int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask)
{
unsigned char *buffer;
@ -84,11 +79,11 @@ int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask,
buffer = kmalloc(size, gfp_mask);
if (!buffer) {
_kfifo_init(fifo, 0, 0, NULL);
_kfifo_init(fifo, 0, 0);
return -ENOMEM;
}
_kfifo_init(fifo, buffer, size, lock);
_kfifo_init(fifo, buffer, size);
return 0;
}

6
net/dccp/probe.c
Просмотреть файл

@ -67,7 +67,7 @@ static void printl(const char *fmt, ...)
len += vscnprintf(tbuf+len, sizeof(tbuf)-len, fmt, args);
va_end(args);
kfifo_put(&dccpw.fifo, tbuf, len);
kfifo_put_locked(&dccpw.fifo, tbuf, len, &dccpw.lock);
wake_up(&dccpw.wait);
}
@ -135,7 +135,7 @@ static ssize_t dccpprobe_read(struct file *file, char __user *buf,
if (error)
goto out_free;
cnt = kfifo_get(&dccpw.fifo, tbuf, len);
cnt = kfifo_get_locked(&dccpw.fifo, tbuf, len, &dccpw.lock);
error = copy_to_user(buf, tbuf, cnt) ? -EFAULT : 0;
out_free:
@ -156,7 +156,7 @@ static __init int dccpprobe_init(void)
init_waitqueue_head(&dccpw.wait);
spin_lock_init(&dccpw.lock);
if (kfifo_alloc(&dccpw.fifo, bufsize, GFP_KERNEL, &dccpw.lock))
if (kfifo_alloc(&dccpw.fifo, bufsize, GFP_KERNEL))
return ret;
if (!proc_net_fops_create(&init_net, procname, S_IRUSR, &dccpprobe_fops))
goto err0;