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kfifo: move struct kfifo in place

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This is a new generic kernel FIFO implementation.

The current kernel fifo API is not very widely used, because it has to
many constrains.  Only 17 files in the current 2.6.31-rc5 used it.
FIFO's are like list's a very basic thing and a kfifo API which handles
the most use case would save a lot of development time and memory
resources.

I think this are the reasons why kfifo is not in use:

 - The API is to simple, important functions are missing
 - A fifo can be only allocated dynamically
 - There is a requirement of a spinlock whether you need it or not
 - There is no support for data records inside a fifo

So I decided to extend the kfifo in a more generic way without blowing up
the API to much.  The new API has the following benefits:

 - Generic usage: For kernel internal use and/or device driver.
 - Provide an API for the most use case.
 - Slim API: The whole API provides 25 functions.
 - Linux style habit.
 - DECLARE_KFIFO, DEFINE_KFIFO and INIT_KFIFO Macros
 - Direct copy_to_user from the fifo and copy_from_user into the fifo.
 - The kfifo itself is an in place member of the using data structure, this save an
   indirection access and does not waste the kernel allocator.
 - Lockless access: if only one reader and one writer is active on the fifo,
   which is the common use case, no additional locking is necessary.
 - Remove spinlock - give the user the freedom of choice what kind of locking to use if
   one is required.
 - Ability to handle records. Three type of records are supported:
   - Variable length records between 0-255 bytes, with a record size
     field of 1 bytes.
   - Variable length records between 0-65535 bytes, with a record size
     field of 2 bytes.
   - Fixed size records, which no record size field.
 - Preserve memory resource.
 - Performance!
 - Easy to use!

This patch:

Since most users want to have the kfifo as part of another object,
reorganize the code to allow including struct kfifo in another data
structure.  This requires changing the kfifo_alloc and kfifo_init
prototypes so that we pass an existing kfifo pointer into them.  This
patch changes the implementation and all existing users.

[akpm@linux-foundation.org: fix warning]
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 14:37:26 -08:00 committed by Linus Torvalds
parent 2ec91eec47
commit 4546548789
24 changed files with 238 additions and 259 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
drivers/char/nozomi.c
View file

@ -358,7 +358,7 @@ struct port {
u8 update_flow_control;
struct ctrl_ul ctrl_ul;
struct ctrl_dl ctrl_dl;
struct kfifo *fifo_ul;
struct kfifo fifo_ul;
void __iomem *dl_addr[2];
u32 dl_size[2];
u8 toggle_dl;
@ -685,8 +685,8 @@ static int nozomi_read_config_table(struct nozomi *dc)
dump_table(dc);
for (i = PORT_MDM; i < MAX_PORT; i++) {
dc->port[i].fifo_ul =
kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
kfifo_alloc(&dc->port[i].fifo_ul,
FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
}
@ -798,7 +798,7 @@ static int send_data(enum port_type index, struct nozomi *dc)
struct tty_struct *tty = tty_port_tty_get(&port->port);
/* Get data from tty and place in buf for now */
size = __kfifo_get(port->fifo_ul, dc->send_buf,
size = __kfifo_get(&port->fifo_ul, dc->send_buf,
ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
if (size == 0) {
@ -988,11 +988,11 @@ static int receive_flow_control(struct nozomi *dc)
} else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
if (__kfifo_len(dc->port[port].fifo_ul)) {
if (__kfifo_len(&dc->port[port].fifo_ul)) {
DBG1("Enable interrupt (0x%04X) on port: %d",
enable_ier, port);
DBG1("Data in buffer [%d], enable transmit! ",
__kfifo_len(dc->port[port].fifo_ul));
__kfifo_len(&dc->port[port].fifo_ul));
enable_transmit_ul(port, dc);
} else {
DBG1("No data in buffer...");
@ -1536,8 +1536,7 @@ static void __devexit nozomi_card_exit(struct pci_dev *pdev)
free_irq(pdev->irq, dc);
for (i = 0; i < MAX_PORT; i++)
if (dc->port[i].fifo_ul)
kfifo_free(dc->port[i].fifo_ul);
kfifo_free(&dc->port[i].fifo_ul);
kfree(dc->send_buf);
@ -1673,7 +1672,7 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
goto exit;
}
rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
rval = __kfifo_put(&port->fifo_ul, (unsigned char *)buffer, count);
/* notify card */
if (unlikely(dc == NULL)) {
@ -1721,7 +1720,7 @@ static int ntty_write_room(struct tty_struct *tty)
if (!port->port.count)
goto exit;
room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
room = port->fifo_ul.size - __kfifo_len(&port->fifo_ul);
exit:
mutex_unlock(&port->tty_sem);
@ -1878,7 +1877,7 @@ static s32 ntty_chars_in_buffer(struct tty_struct *tty)
goto exit_in_buffer;
}
rval = __kfifo_len(port->fifo_ul);
rval = __kfifo_len(&port->fifo_ul);
exit_in_buffer:
return rval;

40
drivers/char/sonypi.c
View file

@ -487,7 +487,7 @@ static struct sonypi_device {
int camera_power;
int bluetooth_power;
struct mutex lock;
struct kfifo *fifo;
struct kfifo fifo;
spinlock_t fifo_lock;
wait_queue_head_t fifo_proc_list;
struct fasync_struct *fifo_async;
@ -496,7 +496,7 @@ static struct sonypi_device {
struct input_dev *input_jog_dev;
struct input_dev *input_key_dev;
struct work_struct input_work;
struct kfifo *input_fifo;
struct kfifo input_fifo;
spinlock_t input_fifo_lock;
} sonypi_device;
@ -777,7 +777,7 @@ static void input_keyrelease(struct work_struct *work)
{
struct sonypi_keypress kp;
while (kfifo_get(sonypi_device.input_fifo, (unsigned char *)&kp,
while (kfifo_get(&sonypi_device.input_fifo, (unsigned char *)&kp,
sizeof(kp)) == sizeof(kp)) {
msleep(10);
input_report_key(kp.dev, kp.key, 0);
@ -827,7 +827,7 @@ 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,
kfifo_put(&sonypi_device.input_fifo,
(unsigned char *)&kp, sizeof(kp));
schedule_work(&sonypi_device.input_work);
}
@ -880,7 +880,7 @@ found:
acpi_bus_generate_proc_event(sonypi_acpi_device, 1, event);
#endif
kfifo_put(sonypi_device.fifo, (unsigned char *)&event, sizeof(event));
kfifo_put(&sonypi_device.fifo, (unsigned char *)&event, sizeof(event));
kill_fasync(&sonypi_device.fifo_async, SIGIO, POLL_IN);
wake_up_interruptible(&sonypi_device.fifo_proc_list);
@ -906,7 +906,7 @@ static int sonypi_misc_open(struct inode *inode, struct file *file)
mutex_lock(&sonypi_device.lock);
/* Flush input queue on first open */
if (!sonypi_device.open_count)
kfifo_reset(sonypi_device.fifo);
kfifo_reset(&sonypi_device.fifo);
sonypi_device.open_count++;
mutex_unlock(&sonypi_device.lock);
unlock_kernel();
@ -919,17 +919,17 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
ssize_t ret;
unsigned char c;
if ((kfifo_len(sonypi_device.fifo) == 0) &&
if ((kfifo_len(&sonypi_device.fifo) == 0) &&
(file->f_flags & O_NONBLOCK))
return -EAGAIN;
ret = wait_event_interruptible(sonypi_device.fifo_proc_list,
kfifo_len(sonypi_device.fifo) != 0);
kfifo_len(&sonypi_device.fifo) != 0);
if (ret)
return ret;
while (ret < count &&
(kfifo_get(sonypi_device.fifo, &c, sizeof(c)) == sizeof(c))) {
(kfifo_get(&sonypi_device.fifo, &c, sizeof(c)) == sizeof(c))) {
if (put_user(c, buf++))
return -EFAULT;
ret++;
@ -946,7 +946,7 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
static unsigned int sonypi_misc_poll(struct file *file, poll_table *wait)
{
poll_wait(file, &sonypi_device.fifo_proc_list, wait);
if (kfifo_len(sonypi_device.fifo))
if (kfifo_len(&sonypi_device.fifo))
return POLLIN | POLLRDNORM;
return 0;
}
@ -1313,11 +1313,11 @@ 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);
sonypi_device.fifo = kfifo_alloc(SONYPI_BUF_SIZE, GFP_KERNEL,
error = kfifo_alloc(&sonypi_device.fifo, SONYPI_BUF_SIZE, GFP_KERNEL,
&sonypi_device.fifo_lock);
if (IS_ERR(sonypi_device.fifo)) {
if (error) {
printk(KERN_ERR "sonypi: kfifo_alloc failed\n");
return PTR_ERR(sonypi_device.fifo);
return error;
}
init_waitqueue_head(&sonypi_device.fifo_proc_list);
@ -1393,12 +1393,10 @@ static int __devinit sonypi_probe(struct platform_device *dev)
}
spin_lock_init(&sonypi_device.input_fifo_lock);
sonypi_device.input_fifo =
kfifo_alloc(SONYPI_BUF_SIZE, GFP_KERNEL,
&sonypi_device.input_fifo_lock);
if (IS_ERR(sonypi_device.input_fifo)) {
error = kfifo_alloc(&sonypi_device.input_fifo, SONYPI_BUF_SIZE,
GFP_KERNEL, &sonypi_device.input_fifo_lock);
if (error) {
printk(KERN_ERR "sonypi: kfifo_alloc failed\n");
error = PTR_ERR(sonypi_device.input_fifo);
goto err_inpdev_unregister;
}
@ -1423,7 +1421,7 @@ static int __devinit sonypi_probe(struct platform_device *dev)
pci_disable_device(pcidev);
err_put_pcidev:
pci_dev_put(pcidev);
kfifo_free(sonypi_device.fifo);
kfifo_free(&sonypi_device.fifo);
return error;
}
@ -1438,7 +1436,7 @@ static int __devexit sonypi_remove(struct platform_device *dev)
if (useinput) {
input_unregister_device(sonypi_device.input_key_dev);
input_unregister_device(sonypi_device.input_jog_dev);
kfifo_free(sonypi_device.input_fifo);
kfifo_free(&sonypi_device.input_fifo);
}
misc_deregister(&sonypi_misc_device);
@ -1451,7 +1449,7 @@ static int __devexit sonypi_remove(struct platform_device *dev)
pci_dev_put(sonypi_device.dev);
}
kfifo_free(sonypi_device.fifo);
kfifo_free(&sonypi_device.fifo);
return 0;
}

9
drivers/infiniband/hw/cxgb3/cxio_hal.h
View file

@ -34,6 +34,7 @@
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/kfifo.h>
#include "t3_cpl.h"
#include "t3cdev.h"
@ -75,13 +76,13 @@ struct cxio_hal_ctrl_qp {
};
struct cxio_hal_resource {
struct kfifo *tpt_fifo;
struct kfifo tpt_fifo;
spinlock_t tpt_fifo_lock;
struct kfifo *qpid_fifo;
struct kfifo qpid_fifo;
spinlock_t qpid_fifo_lock;
struct kfifo *cqid_fifo;
struct kfifo cqid_fifo;
spinlock_t cqid_fifo_lock;
struct kfifo *pdid_fifo;
struct kfifo pdid_fifo;
spinlock_t pdid_fifo_lock;
};

60
drivers/infiniband/hw/cxgb3/cxio_resource.c
View file

@ -39,12 +39,12 @@
#include "cxio_resource.h"
#include "cxio_hal.h"
static struct kfifo *rhdl_fifo;
static struct kfifo rhdl_fifo;
static spinlock_t rhdl_fifo_lock;
#define RANDOM_SIZE 16
static int __cxio_init_resource_fifo(struct kfifo **fifo,
static int __cxio_init_resource_fifo(struct kfifo *fifo,
spinlock_t *fifo_lock,
u32 nr, u32 skip_low,
u32 skip_high,
@ -55,12 +55,11 @@ static int __cxio_init_resource_fifo(struct kfifo **fifo,
u32 rarray[16];
spin_lock_init(fifo_lock);
*fifo = kfifo_alloc(nr * sizeof(u32), GFP_KERNEL, fifo_lock);
if (IS_ERR(*fifo))
if (kfifo_alloc(fifo, nr * sizeof(u32), GFP_KERNEL, fifo_lock))
return -ENOMEM;
for (i = 0; i < skip_low + skip_high; i++)
__kfifo_put(*fifo, (unsigned char *) &entry, sizeof(u32));
__kfifo_put(fifo, (unsigned char *) &entry, sizeof(u32));
if (random) {
j = 0;
random_bytes = random32();
@ -72,33 +71,33 @@ static int __cxio_init_resource_fifo(struct kfifo **fifo,
random_bytes = random32();
}
idx = (random_bytes >> (j * 2)) & 0xF;
__kfifo_put(*fifo,
__kfifo_put(fifo,
(unsigned char *) &rarray[idx],
sizeof(u32));
rarray[idx] = i;
j++;
}
for (i = 0; i < RANDOM_SIZE; i++)
__kfifo_put(*fifo,
__kfifo_put(fifo,
(unsigned char *) &rarray[i],
sizeof(u32));
} else
for (i = skip_low; i < nr - skip_high; i++)
__kfifo_put(*fifo, (unsigned char *) &i, sizeof(u32));
__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(fifo, (unsigned char *) &entry, sizeof(u32));
return 0;
}
static int cxio_init_resource_fifo(struct kfifo **fifo, spinlock_t * fifo_lock,
static int cxio_init_resource_fifo(struct kfifo *fifo, spinlock_t * fifo_lock,
u32 nr, u32 skip_low, u32 skip_high)
{
return (__cxio_init_resource_fifo(fifo, fifo_lock, nr, skip_low,
skip_high, 0));
}
static int cxio_init_resource_fifo_random(struct kfifo **fifo,
static int cxio_init_resource_fifo_random(struct kfifo *fifo,
spinlock_t * fifo_lock,
u32 nr, u32 skip_low, u32 skip_high)
{
@ -113,15 +112,14 @@ static int cxio_init_qpid_fifo(struct cxio_rdev *rdev_p)
spin_lock_init(&rdev_p->rscp->qpid_fifo_lock);
rdev_p->rscp->qpid_fifo = kfifo_alloc(T3_MAX_NUM_QP * sizeof(u32),
if (kfifo_alloc(&rdev_p->rscp->qpid_fifo, T3_MAX_NUM_QP * sizeof(u32),
GFP_KERNEL,
&rdev_p->rscp->qpid_fifo_lock);
if (IS_ERR(rdev_p->rscp->qpid_fifo))
&rdev_p->rscp->qpid_fifo_lock))
return -ENOMEM;
for (i = 16; i < T3_MAX_NUM_QP; i++)
if (!(i & rdev_p->qpmask))
__kfifo_put(rdev_p->rscp->qpid_fifo,
__kfifo_put(&rdev_p->rscp->qpid_fifo,
(unsigned char *) &i, sizeof(u32));
return 0;
}
@ -134,7 +132,7 @@ int cxio_hal_init_rhdl_resource(u32 nr_rhdl)
void cxio_hal_destroy_rhdl_resource(void)
{
kfifo_free(rhdl_fifo);
kfifo_free(&rhdl_fifo);
}
/* nr_* must be power of 2 */
@ -167,11 +165,11 @@ int cxio_hal_init_resource(struct cxio_rdev *rdev_p,
goto pdid_err;
return 0;
pdid_err:
kfifo_free(rscp->cqid_fifo);
kfifo_free(&rscp->cqid_fifo);
cqid_err:
kfifo_free(rscp->qpid_fifo);
kfifo_free(&rscp->qpid_fifo);
qpid_err:
kfifo_free(rscp->tpt_fifo);
kfifo_free(&rscp->tpt_fifo);
tpt_err:
return -ENOMEM;
}
@ -195,17 +193,17 @@ static void cxio_hal_put_resource(struct kfifo *fifo, u32 entry)
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);
}
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, 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);
PDBG("%s qpid 0x%x\n", __func__, qpid);
return qpid;
}
@ -213,35 +211,35 @@ 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, 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);
}
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, 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);
}
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, pdid);
}
void cxio_hal_destroy_resource(struct cxio_hal_resource *rscp)
{
kfifo_free(rscp->tpt_fifo);
kfifo_free(rscp->cqid_fifo);
kfifo_free(rscp->qpid_fifo);
kfifo_free(rscp->pdid_fifo);
kfifo_free(&rscp->tpt_fifo);
kfifo_free(&rscp->cqid_fifo);
kfifo_free(&rscp->qpid_fifo);
kfifo_free(&rscp->pdid_fifo);
kfree(rscp);
}

48
drivers/media/video/meye.c
View file

@ -800,7 +800,7 @@ again:
return IRQ_HANDLED;
if (meye.mchip_mode == MCHIP_HIC_MODE_CONT_OUT) {
if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
if (kfifo_get(&meye.grabq, (unsigned char *)&reqnr,
sizeof(int)) != sizeof(int)) {
mchip_free_frame();
return IRQ_HANDLED;
@ -811,7 +811,7 @@ 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(&meye.doneq, (unsigned char *)&reqnr, sizeof(int));
wake_up_interruptible(&meye.proc_list);
} else {
int size;
@ -820,7 +820,7 @@ again:
mchip_free_frame();
goto again;
}
if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
if (kfifo_get(&meye.grabq, (unsigned char *)&reqnr,
sizeof(int)) != sizeof(int)) {
mchip_free_frame();
goto again;
@ -831,7 +831,7 @@ 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(&meye.doneq, (unsigned char *)&reqnr, sizeof(int));
wake_up_interruptible(&meye.proc_list);
}
mchip_free_frame();
@ -859,8 +859,8 @@ static int meye_open(struct file *file)
for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
kfifo_reset(meye.grabq);
kfifo_reset(meye.doneq);
kfifo_reset(&meye.grabq);
kfifo_reset(&meye.doneq);
return 0;
}
@ -933,7 +933,7 @@ 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(&meye.grabq, (unsigned char *)nb, sizeof(int));
mutex_unlock(&meye.lock);
return 0;
@ -965,7 +965,7 @@ 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(&meye.doneq, (unsigned char *)&unused, sizeof(int));
}
*i = meye.grab_buffer[*i].size;
mutex_unlock(&meye.lock);
@ -1452,7 +1452,7 @@ 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(&meye.grabq, (unsigned char *)&buf->index, sizeof(int));
mutex_unlock(&meye.lock);
return 0;
@ -1467,18 +1467,18 @@ static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
mutex_lock(&meye.lock);
if (kfifo_len(meye.doneq) == 0 && file->f_flags & O_NONBLOCK) {
if (kfifo_len(&meye.doneq) == 0 && file->f_flags & O_NONBLOCK) {
mutex_unlock(&meye.lock);
return -EAGAIN;
}
if (wait_event_interruptible(meye.proc_list,
kfifo_len(meye.doneq) != 0) < 0) {
kfifo_len(&meye.doneq) != 0) < 0) {
mutex_unlock(&meye.lock);
return -EINTR;
}
if (!kfifo_get(meye.doneq, (unsigned char *)&reqnr,
if (!kfifo_get(&meye.doneq, (unsigned char *)&reqnr,
sizeof(int))) {
mutex_unlock(&meye.lock);
return -EBUSY;
@ -1529,8 +1529,8 @@ static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
{
mutex_lock(&meye.lock);
mchip_hic_stop();
kfifo_reset(meye.grabq);
kfifo_reset(meye.doneq);
kfifo_reset(&meye.grabq);
kfifo_reset(&meye.doneq);
for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
@ -1572,7 +1572,7 @@ static unsigned int meye_poll(struct file *file, poll_table *wait)
mutex_lock(&meye.lock);
poll_wait(file, &meye.proc_list, wait);
if (kfifo_len(meye.doneq))
if (kfifo_len(&meye.doneq))
res = POLLIN | POLLRDNORM;
mutex_unlock(&meye.lock);
return res;
@ -1745,16 +1745,14 @@ static int __devinit meye_probe(struct pci_dev *pcidev,
}
spin_lock_init(&meye.grabq_lock);
meye.grabq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
&meye.grabq_lock);
if (IS_ERR(meye.grabq)) {
if (kfifo_alloc(&meye.grabq, sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
&meye.grabq_lock)) {
printk(KERN_ERR "meye: fifo allocation failed\n");
goto outkfifoalloc1;
}
spin_lock_init(&meye.doneq_lock);
meye.doneq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
&meye.doneq_lock);
if (IS_ERR(meye.doneq)) {
if (kfifo_alloc(&meye.doneq, sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
&meye.doneq_lock)) {
printk(KERN_ERR "meye: fifo allocation failed\n");
goto outkfifoalloc2;
}
@ -1868,9 +1866,9 @@ outregions:
outenabledev:
sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 0);
outsonypienable:
kfifo_free(meye.doneq);
kfifo_free(&meye.doneq);
outkfifoalloc2:
kfifo_free(meye.grabq);
kfifo_free(&meye.grabq);
outkfifoalloc1:
vfree(meye.grab_temp);
outvmalloc:
@ -1901,8 +1899,8 @@ static void __devexit meye_remove(struct pci_dev *pcidev)
sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 0);
kfifo_free(meye.doneq);
kfifo_free(meye.grabq);
kfifo_free(&meye.doneq);
kfifo_free(&meye.grabq);
vfree(meye.grab_temp);

4
drivers/media/video/meye.h
View file

@ -303,9 +303,9 @@ struct meye {
struct meye_grab_buffer grab_buffer[MEYE_MAX_BUFNBRS];
int vma_use_count[MEYE_MAX_BUFNBRS]; /* mmap count */
struct mutex lock; /* mutex for open/mmap... */
struct kfifo *grabq; /* queue for buffers to be grabbed */
struct kfifo grabq; /* queue for buffers to be grabbed */
spinlock_t grabq_lock; /* lock protecting the queue */
struct kfifo *doneq; /* queue for grabbed buffers */
struct kfifo doneq; /* queue for grabbed buffers */
spinlock_t doneq_lock; /* lock protecting the queue */
wait_queue_head_t proc_list; /* wait queue */
struct video_device *video_dev; /* video device parameters */

4
drivers/net/wireless/libertas/cmd.c
View file

@ -1365,7 +1365,7 @@ static void lbs_send_confirmsleep(struct lbs_private *priv)
priv->dnld_sent = DNLD_RES_RECEIVED;
/* If nothing to do, go back to sleep (?) */
if (!__kfifo_len(priv->event_fifo) && !priv->resp_len[priv->resp_idx])
if (!__kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
priv->psstate = PS_STATE_SLEEP;
spin_unlock_irqrestore(&priv->driver_lock, flags);
@ -1439,7 +1439,7 @@ void lbs_ps_confirm_sleep(struct lbs_private *priv)
}
/* Pending events or command responses? */
if (__kfifo_len(priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
if (__kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
allowed = 0;
lbs_deb_host("pending events or command responses\n");
}

4
drivers/net/wireless/libertas/dev.h
View file

@ -10,7 +10,7 @@
#include "scan.h"
#include "assoc.h"
#include <linux/kfifo.h>
/** sleep_params */
struct sleep_params {
@ -120,7 +120,7 @@ struct lbs_private {
u32 resp_len[2];
/* Events sent from hardware to driver */
struct kfifo *event_fifo;
struct kfifo event_fifo;
/** thread to service interrupts */
struct task_struct *main_thread;

16
drivers/net/wireless/libertas/main.c
View file

@ -459,7 +459,7 @@ static int lbs_thread(void *data)
else if (!list_empty(&priv->cmdpendingq) &&
!(priv->wakeup_dev_required))
shouldsleep = 0; /* We have a command to send */
else if (__kfifo_len(priv->event_fifo))
else if (__kfifo_len(&priv->event_fifo))
shouldsleep = 0; /* We have an event to process */
else
shouldsleep = 1; /* No command */
@ -511,9 +511,9 @@ static int lbs_thread(void *data)
/* Process hardware events, e.g. card removed, link lost */
spin_lock_irq(&priv->driver_lock);
while (__kfifo_len(priv->event_fifo)) {
while (__kfifo_len(&priv->event_fifo)) {
u32 event;
__kfifo_get(priv->event_fifo, (unsigned char *) &event,
__kfifo_get(&priv->event_fifo, (unsigned char *) &event,
sizeof(event));
spin_unlock_irq(&priv->driver_lock);
lbs_process_event(priv, event);
@ -883,10 +883,9 @@ static int lbs_init_adapter(struct lbs_private *priv)
priv->resp_len[0] = priv->resp_len[1] = 0;
/* Create the event FIFO */
priv->event_fifo = kfifo_alloc(sizeof(u32) * 16, GFP_KERNEL, NULL);
if (IS_ERR(priv->event_fifo)) {
ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL, NULL);
if (ret) {
lbs_pr_err("Out of memory allocating event FIFO buffer\n");
ret = -ENOMEM;
goto out;
}
@ -901,8 +900,7 @@ static void lbs_free_adapter(struct lbs_private *priv)
lbs_deb_enter(LBS_DEB_MAIN);
lbs_free_cmd_buffer(priv);
if (priv->event_fifo)
kfifo_free(priv->event_fifo);
kfifo_free(&priv->event_fifo);
del_timer(&priv->command_timer);
del_timer(&priv->auto_deepsleep_timer);
kfree(priv->networks);
@ -1177,7 +1175,7 @@ void lbs_queue_event(struct lbs_private *priv, u32 event)
if (priv->psstate == PS_STATE_SLEEP)
priv->psstate = PS_STATE_AWAKE;
__kfifo_put(priv->event_fifo, (unsigned char *) &event, sizeof(u32));
__kfifo_put(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
wake_up_interruptible(&priv->waitq);

18
drivers/platform/x86/fujitsu-laptop.c
View file

@ -164,7 +164,7 @@ struct fujitsu_hotkey_t {
struct input_dev *input;
char phys[32];
struct platform_device *pf_device;
struct kfifo *fifo;
struct kfifo fifo;
spinlock_t fifo_lock;
int rfkill_supported;
int rfkill_state;
@ -824,12 +824,10 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
/* kfifo */
spin_lock_init(&fujitsu_hotkey->fifo_lock);
fujitsu_hotkey->fifo =
kfifo_alloc(RINGBUFFERSIZE * sizeof(int), GFP_KERNEL,
&fujitsu_hotkey->fifo_lock);
if (IS_ERR(fujitsu_hotkey->fifo)) {
error = kfifo_alloc(&fujitsu_hotkey->fifo, RINGBUFFERSIZE * sizeof(int),
GFP_KERNEL, &fujitsu_hotkey->fifo_lock);
if (error) {
printk(KERN_ERR "kfifo_alloc failed\n");
error = PTR_ERR(fujitsu_hotkey->fifo);
goto err_stop;
}
@ -934,7 +932,7 @@ err_unregister_input_dev:
err_free_input_dev:
input_free_device(input);
err_free_fifo:
kfifo_free(fujitsu_hotkey->fifo);
kfifo_free(&fujitsu_hotkey->fifo);
err_stop:
return result;
}
@ -956,7 +954,7 @@ static int acpi_fujitsu_hotkey_remove(struct acpi_device *device, int type)
input_free_device(input);
kfifo_free(fujitsu_hotkey->fifo);
kfifo_free(&fujitsu_hotkey->fifo);
fujitsu_hotkey->acpi_handle = NULL;
@ -1008,7 +1006,7 @@ 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(&fujitsu_hotkey->fifo,
(unsigned char *)&keycode,
sizeof(keycode));
if (status != sizeof(keycode)) {
@ -1022,7 +1020,7 @@ 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 *)
(&fujitsu_hotkey->fifo, (unsigned char *)
&keycode_r,
sizeof
(keycode_r))) == sizeof(keycode_r)) {

46
drivers/platform/x86/sony-laptop.c
View file

@ -142,7 +142,7 @@ struct sony_laptop_input_s {
atomic_t users;
struct input_dev *jog_dev;
struct input_dev *key_dev;
struct kfifo *fifo;
struct kfifo fifo;
spinlock_t fifo_lock;
struct workqueue_struct *wq;
};
@ -300,7 +300,7 @@ 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,
while (kfifo_get(&sony_laptop_input.fifo, (unsigned char *)&kp,
sizeof(kp)) == sizeof(kp)) {
msleep(10);
input_report_key(kp.dev, kp.key, 0);
@ -362,7 +362,7 @@ 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,
kfifo_put(&sony_laptop_input.fifo,
(unsigned char *)&kp, sizeof(kp));
if (!work_pending(&sony_laptop_release_key_work))
@ -385,12 +385,11 @@ static int sony_laptop_setup_input(struct acpi_device *acpi_device)
/* kfifo */
spin_lock_init(&sony_laptop_input.fifo_lock);
sony_laptop_input.fifo =
kfifo_alloc(SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
error =
kfifo_alloc(&sony_laptop_input.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
&sony_laptop_input.fifo_lock);
if (IS_ERR(sony_laptop_input.fifo)) {
if (error) {
printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
error = PTR_ERR(sony_laptop_input.fifo);
goto err_dec_users;
}
@ -474,7 +473,7 @@ err_destroy_wq:
destroy_workqueue(sony_laptop_input.wq);
err_free_kfifo:
kfifo_free(sony_laptop_input.fifo);
kfifo_free(&sony_laptop_input.fifo);
err_dec_users:
atomic_dec(&sony_laptop_input.users);
@ -500,7 +499,7 @@ static void sony_laptop_remove_input(void)
}
destroy_workqueue(sony_laptop_input.wq);
kfifo_free(sony_laptop_input.fifo);
kfifo_free(&sony_laptop_input.fifo);
}
/*********** Platform Device ***********/
@ -2079,7 +2078,7 @@ static struct attribute_group spic_attribute_group = {
struct sonypi_compat_s {
struct fasync_struct *fifo_async;
struct kfifo *fifo;
struct kfifo fifo;
spinlock_t fifo_lock;
wait_queue_head_t fifo_proc_list;
atomic_t open_count;
@ -2104,12 +2103,12 @@ static int sonypi_misc_open(struct inode *inode, struct file *file)
/* Flush input queue on first open */
unsigned long flags;
spin_lock_irqsave(sonypi_compat.fifo->lock, flags);
spin_lock_irqsave(&sonypi_compat.fifo_lock, flags);
if (atomic_inc_return(&sonypi_compat.open_count) == 1)
__kfifo_reset(sonypi_compat.fifo);
__kfifo_reset(&sonypi_compat.fifo);
spin_unlock_irqrestore(sonypi_compat.fifo->lock, flags);
spin_unlock_irqrestore(&sonypi_compat.fifo_lock, flags);
return 0;
}
@ -2120,17 +2119,17 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
ssize_t ret;
unsigned char c;
if ((kfifo_len(sonypi_compat.fifo) == 0) &&
if ((kfifo_len(&sonypi_compat.fifo) == 0) &&
(file->f_flags & O_NONBLOCK))
return -EAGAIN;
ret = wait_event_interruptible(sonypi_compat.fifo_proc_list,
kfifo_len(sonypi_compat.fifo) != 0);
kfifo_len(&sonypi_compat.fifo) != 0);
if (ret)
return ret;
while (ret < count &&
(kfifo_get(sonypi_compat.fifo, &c, sizeof(c)) == sizeof(c))) {
(kfifo_get(&sonypi_compat.fifo, &c, sizeof(c)) == sizeof(c))) {
if (put_user(c, buf++))
return -EFAULT;
ret++;
@ -2147,7 +2146,7 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
static unsigned int sonypi_misc_poll(struct file *file, poll_table *wait)
{
poll_wait(file, &sonypi_compat.fifo_proc_list, wait);
if (kfifo_len(sonypi_compat.fifo))
if (kfifo_len(&sonypi_compat.fifo))
return POLLIN | POLLRDNORM;
return 0;
}
@ -2309,7 +2308,7 @@ 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(&sonypi_compat.fifo, (unsigned char *)&event, sizeof(event));
kill_fasync(&sonypi_compat.fifo_async, SIGIO, POLL_IN);
wake_up_interruptible(&sonypi_compat.fifo_proc_list);
}
@ -2319,11 +2318,12 @@ static int sonypi_compat_init(void)
int error;
spin_lock_init(&sonypi_compat.fifo_lock);
sonypi_compat.fifo = kfifo_alloc(SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
error =
kfifo_alloc(&sonypi_compat.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
&sonypi_compat.fifo_lock);
if (IS_ERR(sonypi_compat.fifo)) {
if (error) {
printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
return PTR_ERR(sonypi_compat.fifo);
return error;
}
init_waitqueue_head(&sonypi_compat.fifo_proc_list);
@ -2342,14 +2342,14 @@ static int sonypi_compat_init(void)
return 0;
err_free_kfifo:
kfifo_free(sonypi_compat.fifo);
kfifo_free(&sonypi_compat.fifo);
return error;
}
static void sonypi_compat_exit(void)
{
misc_deregister(&sonypi_misc_device);
kfifo_free(sonypi_compat.fifo);
kfifo_free(&sonypi_compat.fifo);
}
#else
static int sonypi_compat_init(void) { return 0; }

22
drivers/scsi/libiscsi.c
View file

@ -517,7 +517,7 @@ static void iscsi_free_task(struct iscsi_task *task)
if (conn->login_task == task)
return;
__kfifo_put(session->cmdpool.queue, (void*)&task, sizeof(void*));
__kfifo_put(&session->cmdpool.queue, (void*)&task, sizeof(void*));
if (sc) {
task->sc = NULL;
@ -737,7 +737,7 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
if (!__kfifo_get(session->cmdpool.queue,
if (!__kfifo_get(&session->cmdpool.queue,
(void*)&task, sizeof(void*)))
return NULL;
}
@ -1567,7 +1567,7 @@ static inline struct iscsi_task *iscsi_alloc_task(struct iscsi_conn *conn,
{
struct iscsi_task *task;
if (!__kfifo_get(conn->session->cmdpool.queue,
if (!__kfifo_get(&conn->session->cmdpool.queue,
(void *) &task, sizeof(void *)))
return NULL;
@ -2461,12 +2461,7 @@ iscsi_pool_init(struct iscsi_pool *q, int max, void ***items, int item_size)
if (q->pool == NULL)
return -ENOMEM;
q->queue = kfifo_init((void*)q->pool, max * sizeof(void*),
GFP_KERNEL, NULL);
if (IS_ERR(q->queue)) {
q->queue = NULL;
goto enomem;
}
kfifo_init(&q->queue, (void*)q->pool, max * sizeof(void*), NULL);
for (i = 0; i < max; i++) {
q->pool[i] = kzalloc(item_size, GFP_KERNEL);
@ -2474,7 +2469,7 @@ iscsi_pool_init(struct iscsi_pool *q, int max, void ***items, int item_size)
q->max = i;
goto enomem;
}
__kfifo_put(q->queue, (void*)&q->pool[i], sizeof(void*));
__kfifo_put(&q->queue, (void*)&q->pool[i], sizeof(void*));
}
if (items) {
@ -2497,7 +2492,6 @@ void iscsi_pool_free(struct iscsi_pool *q)
for (i = 0; i < q->max; i++)
kfree(q->pool[i]);
kfree(q->pool);
kfree(q->queue);
}
EXPORT_SYMBOL_GPL(iscsi_pool_free);
@ -2825,7 +2819,7 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
/* allocate login_task used for the login/text sequences */
spin_lock_bh(&session->lock);
if (!__kfifo_get(session->cmdpool.queue,
if (!__kfifo_get(&session->cmdpool.queue,
(void*)&conn->login_task,
sizeof(void*))) {
spin_unlock_bh(&session->lock);
@ -2845,7 +2839,7 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
return cls_conn;
login_task_data_alloc_fail:
__kfifo_put(session->cmdpool.queue, (void*)&conn->login_task,
__kfifo_put(&session->cmdpool.queue, (void*)&conn->login_task,
sizeof(void*));
login_task_alloc_fail:
iscsi_destroy_conn(cls_conn);
@ -2908,7 +2902,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
free_pages((unsigned long) conn->data,
get_order(ISCSI_DEF_MAX_RECV_SEG_LEN));
kfree(conn->persistent_address);
__kfifo_put(session->cmdpool.queue, (void*)&conn->login_task,
__kfifo_put(&session->cmdpool.queue, (void*)&conn->login_task,
sizeof(void*));
if (session->leadconn == conn)
session->leadconn = NULL;

29
drivers/scsi/libiscsi_tcp.c
View file

@ -445,15 +445,15 @@ void iscsi_tcp_cleanup_task(struct iscsi_task *task)
return;
/* flush task's r2t queues */
while (__kfifo_get(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*))) {
__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
while (__kfifo_get(&tcp_task->r2tqueue, (void*)&r2t, sizeof(void*))) {
__kfifo_put(&tcp_task->r2tpool.queue, (void*)&r2t,
sizeof(void*));
ISCSI_DBG_TCP(task->conn, "pending r2t dropped\n");
}
r2t = tcp_task->r2t;
if (r2t != NULL) {
__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
__kfifo_put(&tcp_task->r2tpool.queue, (void*)&r2t,
sizeof(void*));
tcp_task->r2t = NULL;
}
@ -541,7 +541,7 @@ static int iscsi_tcp_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task)
return 0;
}
rc = __kfifo_get(tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*));
rc = __kfifo_get(&tcp_task->r2tpool.queue, (void*)&r2t, sizeof(void*));
if (!rc) {
iscsi_conn_printk(KERN_ERR, conn, "Could not allocate R2T. "
"Target has sent more R2Ts than it "
@ -554,7 +554,7 @@ static int iscsi_tcp_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task)
if (r2t->data_length == 0) {
iscsi_conn_printk(KERN_ERR, conn,
"invalid R2T with zero data len\n");
__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
__kfifo_put(&tcp_task->r2tpool.queue, (void*)&r2t,
sizeof(void*));
return ISCSI_ERR_DATALEN;
}
@ -570,7 +570,7 @@ static int iscsi_tcp_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task)
"invalid R2T with data len %u at offset %u "
"and total length %d\n", r2t->data_length,
r2t->data_offset, scsi_out(task->sc)->length);
__kfifo_put(tcp_task->r2tpool.queue, (void*)&r2t,
__kfifo_put(&tcp_task->r2tpool.queue, (void*)&r2t,
sizeof(void*));
return ISCSI_ERR_DATALEN;
}
@ -580,7 +580,7 @@ static int iscsi_tcp_r2t_rsp(struct iscsi_conn *conn, struct iscsi_task *task)
r2t->sent = 0;
tcp_task->exp_datasn = r2tsn + 1;
__kfifo_put(tcp_task->r2tqueue, (void*)&r2t, sizeof(void*));
__kfifo_put(&tcp_task->r2tqueue, (void*)&r2t, sizeof(void*));
conn->r2t_pdus_cnt++;
iscsi_requeue_task(task);
@ -951,7 +951,7 @@ int iscsi_tcp_task_init(struct iscsi_task *task)
return conn->session->tt->init_pdu(task, 0, task->data_count);
}
BUG_ON(__kfifo_len(tcp_task->r2tqueue));
BUG_ON(__kfifo_len(&tcp_task->r2tqueue));
tcp_task->exp_datasn = 0;
/* Prepare PDU, optionally w/ immediate data */
@ -982,7 +982,7 @@ static struct iscsi_r2t_info *iscsi_tcp_get_curr_r2t(struct iscsi_task *task)
if (r2t->data_length <= r2t->sent) {
ISCSI_DBG_TCP(task->conn,
" done with r2t %p\n", r2t);
__kfifo_put(tcp_task->r2tpool.queue,
__kfifo_put(&tcp_task->r2tpool.queue,
(void *)&tcp_task->r2t,
sizeof(void *));
tcp_task->r2t = r2t = NULL;
@ -990,7 +990,7 @@ static struct iscsi_r2t_info *iscsi_tcp_get_curr_r2t(struct iscsi_task *task)
}
if (r2t == NULL) {
__kfifo_get(tcp_task->r2tqueue,
__kfifo_get(&tcp_task->r2tqueue,
(void *)&tcp_task->r2t, sizeof(void *));
r2t = tcp_task->r2t;
}
@ -1127,9 +1127,8 @@ int iscsi_tcp_r2tpool_alloc(struct iscsi_session *session)
}
/* R2T xmit queue */
tcp_task->r2tqueue = kfifo_alloc(
session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL);
if (tcp_task->r2tqueue == ERR_PTR(-ENOMEM)) {
if (kfifo_alloc(&tcp_task->r2tqueue,
session->max_r2t * 4 * sizeof(void*), GFP_KERNEL, NULL)) {
iscsi_pool_free(&tcp_task->r2tpool);
goto r2t_alloc_fail;
}
@ -1142,7 +1141,7 @@ r2t_alloc_fail:
struct iscsi_task *task = session->cmds[i];
struct iscsi_tcp_task *tcp_task = task->dd_data;
kfifo_free(tcp_task->r2tqueue);
kfifo_free(&tcp_task->r2tqueue);
iscsi_pool_free(&tcp_task->r2tpool);
}
return -ENOMEM;
@ -1157,7 +1156,7 @@ void iscsi_tcp_r2tpool_free(struct iscsi_session *session)
struct iscsi_task *task = session->cmds[i];
struct iscsi_tcp_task *tcp_task = task->dd_data;
kfifo_free(tcp_task->r2tqueue);
kfifo_free(&tcp_task->r2tqueue);
iscsi_pool_free(&tcp_task->r2tpool);
}
}

13
drivers/scsi/libsrp.c
View file

@ -58,19 +58,16 @@ static int srp_iu_pool_alloc(struct srp_queue *q, size_t max,
goto free_pool;
spin_lock_init(&q->lock);
q->queue = kfifo_init((void *) q->pool, max * sizeof(void *),
GFP_KERNEL, &q->lock);
if (IS_ERR(q->queue))
goto free_item;
kfifo_init(&q->queue, (void *) q->pool, max * sizeof(void *),
&q->lock);
for (i = 0, iue = q->items; i < max; i++) {
__kfifo_put(q->queue, (void *) &iue, sizeof(void *));
__kfifo_put(&q->queue, (void *) &iue, sizeof(void *));
iue->sbuf = ring[i];
iue++;
}
return 0;
free_item:
kfree(q->items);
free_pool:
kfree(q->pool);
@ -167,7 +164,7 @@ 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(&target->iu_queue.queue, (void *) &iue, sizeof(void *));
if (!iue)
return iue;
iue->target = target;
@ -179,7 +176,7 @@ 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(&iue->target->iu_queue.queue, (void *) &iue, sizeof(void *));
}
EXPORT_SYMBOL_GPL(srp_iu_put);

10
drivers/usb/host/fhci-sched.c
View file

@ -37,7 +37,7 @@ static void recycle_frame(struct fhci_usb *usb, struct packet *pkt)
pkt->info = 0;
pkt->priv_data = NULL;
cq_put(usb->ep0->empty_frame_Q, pkt);
cq_put(&usb->ep0->empty_frame_Q, pkt);
}
/* confirm submitted packet */
@ -57,7 +57,7 @@ void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt)
if ((td->data + td->actual_len) && trans_len)
memcpy(td->data + td->actual_len, pkt->data,
trans_len);
cq_put(usb->ep0->dummy_packets_Q, pkt->data);
cq_put(&usb->ep0->dummy_packets_Q, pkt->data);
}
recycle_frame(usb, pkt);
@ -213,7 +213,7 @@ static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td)
}
/* update frame object fields before transmitting */
pkt = cq_get(usb->ep0->empty_frame_Q);
pkt = cq_get(&usb->ep0->empty_frame_Q);
if (!pkt) {
fhci_dbg(usb->fhci, "there is no empty frame\n");
return -1;
@ -222,7 +222,7 @@ static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td)
pkt->info = 0;
if (data == NULL) {
data = cq_get(usb->ep0->dummy_packets_Q);
data = cq_get(&usb->ep0->dummy_packets_Q);
BUG_ON(!data);
pkt->info = PKT_DUMMY_PACKET;
}
@ -246,7 +246,7 @@ static int add_packet(struct fhci_usb *usb, struct ed *ed, struct td *td)
list_del_init(&td->frame_lh);
td->status = USB_TD_OK;
if (pkt->info & PKT_DUMMY_PACKET)
cq_put(usb->ep0->dummy_packets_Q, pkt->data);
cq_put(&usb->ep0->dummy_packets_Q, pkt->data);
recycle_frame(usb, pkt);
usb->actual_frame->total_bytes -= (len + PROTOCOL_OVERHEAD);
fhci_err(usb->fhci, "host transaction failed\n");

35
drivers/usb/host/fhci-tds.c
View file

@ -106,33 +106,33 @@ void fhci_ep0_free(struct fhci_usb *usb)
cpm_muram_free(cpm_muram_offset(ep->td_base));
if (ep->conf_frame_Q) {
size = cq_howmany(ep->conf_frame_Q);
size = cq_howmany(&ep->conf_frame_Q);
for (; size; size--) {
struct packet *pkt = cq_get(ep->conf_frame_Q);
struct packet *pkt = cq_get(&ep->conf_frame_Q);
kfree(pkt);
}
cq_delete(ep->conf_frame_Q);
cq_delete(&ep->conf_frame_Q);
}
if (ep->empty_frame_Q) {
size = cq_howmany(ep->empty_frame_Q);
size = cq_howmany(&ep->empty_frame_Q);
for (; size; size--) {
struct packet *pkt = cq_get(ep->empty_frame_Q);
struct packet *pkt = cq_get(&ep->empty_frame_Q);
kfree(pkt);
}
cq_delete(ep->empty_frame_Q);
cq_delete(&ep->empty_frame_Q);
}
if (ep->dummy_packets_Q) {
size = cq_howmany(ep->dummy_packets_Q);
size = cq_howmany(&ep->dummy_packets_Q);
for (; size; size--) {
u8 *buff = cq_get(ep->dummy_packets_Q);
u8 *buff = cq_get(&ep->dummy_packets_Q);
kfree(buff);
}
cq_delete(ep->dummy_packets_Q);
cq_delete(&ep->dummy_packets_Q);
}
kfree(ep);
@ -175,10 +175,9 @@ u32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
ep->td_base = cpm_muram_addr(ep_offset);
/* zero all queue pointers */
ep->conf_frame_Q = cq_new(ring_len + 2);
ep->empty_frame_Q = cq_new(ring_len + 2);
ep->dummy_packets_Q = cq_new(ring_len + 2);
if (!ep->conf_frame_Q || !ep->empty_frame_Q || !ep->dummy_packets_Q) {
if (cq_new(&ep->conf_frame_Q, ring_len + 2) ||
cq_new(&ep->empty_frame_Q, ring_len + 2) ||
cq_new(&ep->dummy_packets_Q, ring_len + 2)) {
err_for = "frame_queues";
goto err;
}
@ -199,8 +198,8 @@ u32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
err_for = "buffer";
goto err;
}
cq_put(ep->empty_frame_Q, pkt);
cq_put(ep->dummy_packets_Q, buff);
cq_put(&ep->empty_frame_Q, pkt);
cq_put(&ep->dummy_packets_Q, buff);
}
/* we put the endpoint parameter RAM right behind the TD ring */
@ -319,7 +318,7 @@ static void fhci_td_transaction_confirm(struct fhci_usb *usb)
if ((buf == DUMMY2_BD_BUFFER) && !(td_status & ~TD_W))
continue;
pkt = cq_get(ep->conf_frame_Q);
pkt = cq_get(&ep->conf_frame_Q);
if (!pkt)
fhci_err(usb->fhci, "no frame to confirm\n");
@ -460,9 +459,9 @@ u32 fhci_host_transaction(struct fhci_usb *usb,
out_be16(&td->length, pkt->len);
/* put the frame to the confirmation queue */
cq_put(ep->conf_frame_Q, pkt);
cq_put(&ep->conf_frame_Q, pkt);
if (cq_howmany(ep->conf_frame_Q) == 1)
if (cq_howmany(&ep->conf_frame_Q) == 1)
out_8(&usb->fhci->regs->usb_comm, USB_CMD_STR_FIFO);
return 0;

10
drivers/usb/host/fhci.h
View file

@ -423,9 +423,9 @@ struct endpoint {
struct usb_td __iomem *td_base; /* first TD in the ring */
struct usb_td __iomem *conf_td; /* next TD for confirm after transac */
struct usb_td __iomem *empty_td;/* next TD for new transaction req. */
struct kfifo *empty_frame_Q; /* Empty frames list to use */
struct kfifo *conf_frame_Q; /* frames passed to TDs,waiting for tx */
struct kfifo *dummy_packets_Q;/* dummy packets for the CRC overun */
struct kfifo empty_frame_Q; /* Empty frames list to use */
struct kfifo conf_frame_Q; /* frames passed to TDs,waiting for tx */
struct kfifo dummy_packets_Q;/* dummy packets for the CRC overun */
bool already_pushed_dummy_bd;
};
@ -493,9 +493,9 @@ static inline struct usb_hcd *fhci_to_hcd(struct fhci_hcd *fhci)
}
/* fifo of pointers */
static inline struct kfifo *cq_new(int size)
static inline int cq_new(struct kfifo *fifo, int size)
{
return kfifo_alloc(size * sizeof(void *), GFP_KERNEL, NULL);
return kfifo_alloc(fifo, size * sizeof(void *), GFP_KERNEL, NULL);
}
static inline void cq_delete(struct kfifo *kfifo)

5
drivers/usb/serial/usb-serial.c
View file

@ -939,9 +939,8 @@ int usb_serial_probe(struct usb_interface *interface,
dev_err(&interface->dev, "No free urbs available\n");
goto probe_error;
}
port->write_fifo = kfifo_alloc(PAGE_SIZE, GFP_KERNEL,
&port->lock);
if (IS_ERR(port->write_fifo))
if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL,
&port->lock))
goto probe_error;
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
port->bulk_out_size = buffer_size;

11
include/linux/kfifo.h
View file

@ -1,6 +1,7 @@
/*
* A simple kernel FIFO implementation.
* A generic kernel FIFO implementation.
*
* Copyright (C) 2009 Stefani Seibold <stefani@seibold.net>
* Copyright (C) 2004 Stelian Pop <stelian@popies.net>
*
* This program is free software; you can redistribute it and/or modify
@ -32,10 +33,10 @@ struct kfifo {
spinlock_t *lock; /* protects concurrent modifications */
};
extern struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
gfp_t gfp_mask, spinlock_t *lock);
extern struct kfifo *kfifo_alloc(unsigned int size, gfp_t gfp_mask,
spinlock_t *lock);
extern void kfifo_init(struct kfifo *fifo, unsigned char *buffer,
unsigned int size, spinlock_t *lock);
extern __must_check int kfifo_alloc(struct kfifo *fifo, unsigned int size,
gfp_t gfp_mask, spinlock_t *lock);
extern void kfifo_free(struct kfifo *fifo);
extern unsigned int __kfifo_put(struct kfifo *fifo,
const unsigned char *buffer, unsigned int len);

3
include/scsi/libiscsi.h
View file

@ -28,6 +28,7 @@
#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/kfifo.h>
#include <scsi/iscsi_proto.h>
#include <scsi/iscsi_if.h>
#include <scsi/scsi_transport_iscsi.h>
@ -231,7 +232,7 @@ struct iscsi_conn {
};
struct iscsi_pool {
struct kfifo *queue; /* FIFO Queue */
struct kfifo queue; /* FIFO Queue */
void **pool; /* Pool of elements */
int max; /* Max number of elements */
};

2
include/scsi/libiscsi_tcp.h
View file

@ -80,7 +80,7 @@ struct iscsi_tcp_task {
int data_offset;
struct iscsi_r2t_info *r2t; /* in progress solict R2T */
struct iscsi_pool r2tpool;
struct kfifo *r2tqueue;
struct kfifo r2tqueue;
void *dd_data;
};

2
include/scsi/libsrp.h
View file

@ -21,7 +21,7 @@ struct srp_buf {
struct srp_queue {
void *pool;
void *items;
struct kfifo *queue;
struct kfifo queue;
spinlock_t lock;
};

65
kernel/kfifo.c
View file

@ -1,6 +1,7 @@
/*
* A simple kernel FIFO implementation.
* A generic kernel FIFO implementation.
*
* Copyright (C) 2009 Stefani Seibold <stefani@seibold.net>
* Copyright (C) 2004 Stelian Pop <stelian@popies.net>
*
* This program is free software; you can redistribute it and/or modify
@ -26,49 +27,51 @@
#include <linux/kfifo.h>
#include <linux/log2.h>
static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
unsigned int size, spinlock_t *lock)
{
fifo->buffer = buffer;
fifo->size = size;
fifo->lock = lock;
kfifo_reset(fifo);
}
/**
* kfifo_init - allocates a new FIFO using a preallocated buffer
* kfifo_init - initialize a FIFO using a preallocated 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.
* @gfp_mask: get_free_pages mask, passed to kmalloc()
* @lock: the lock to be used to protect the fifo buffer
*
* Do NOT pass the kfifo to kfifo_free() after use! Simply free the
* &struct kfifo with kfree().
*/
struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
gfp_t gfp_mask, spinlock_t *lock)
void kfifo_init(struct kfifo *fifo, unsigned char *buffer, unsigned int size,
spinlock_t *lock)
{
struct kfifo *fifo;
/* size must be a power of 2 */
BUG_ON(!is_power_of_2(size));
fifo = kmalloc(sizeof(struct kfifo), gfp_mask);
if (!fifo)
return ERR_PTR(-ENOMEM);
fifo->buffer = buffer;
fifo->size = size;
fifo->in = fifo->out = 0;
fifo->lock = lock;
return fifo;
_kfifo_init(fifo, buffer, size, lock);
}
EXPORT_SYMBOL(kfifo_init);
/**
* kfifo_alloc - allocates a new FIFO and its internal buffer
* @size: the size of the internal buffer to be allocated.
* kfifo_alloc - allocates a new FIFO internal buffer
* @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
*
* The size will be rounded-up to a power of 2.
* The buffer will be release with kfifo_free().
* Return 0 if no error, otherwise the an error code
*/
struct kfifo *kfifo_alloc(unsigned int size, gfp_t gfp_mask, spinlock_t *lock)
int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask,
spinlock_t *lock)
{
unsigned char *buffer;
struct kfifo *ret;
/*
* round up to the next power of 2, since our 'let the indices
@ -80,26 +83,24 @@ struct kfifo *kfifo_alloc(unsigned int size, gfp_t gfp_mask, spinlock_t *lock)
}
buffer = kmalloc(size, gfp_mask);
if (!buffer)
return ERR_PTR(-ENOMEM);
if (!buffer) {
_kfifo_init(fifo, 0, 0, NULL);
return -ENOMEM;
}
ret = kfifo_init(buffer, size, gfp_mask, lock);
_kfifo_init(fifo, buffer, size, lock);
if (IS_ERR(ret))
kfree(buffer);
return ret;
return 0;
}
EXPORT_SYMBOL(kfifo_alloc);
/**
* kfifo_free - frees the FIFO
* kfifo_free - frees the FIFO internal buffer
* @fifo: the fifo to be freed.
*/
void kfifo_free(struct kfifo *fifo)
{
kfree(fifo->buffer);
kfree(fifo);
}
EXPORT_SYMBOL(kfifo_free);

20
net/dccp/probe.c
View file

@ -43,7 +43,7 @@ static int bufsize = 64 * 1024;
static const char procname[] = "dccpprobe";
static struct {
struct kfifo *fifo;
struct kfifo fifo;
spinlock_t lock;
wait_queue_head_t wait;
struct timespec tstart;
@ -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(&dccpw.fifo, tbuf, len);
wake_up(&dccpw.wait);
}
@ -109,7 +109,7 @@ static struct jprobe dccp_send_probe = {
static int dccpprobe_open(struct inode *inode, struct file *file)
{
kfifo_reset(dccpw.fifo);
kfifo_reset(&dccpw.fifo);
getnstimeofday(&dccpw.tstart);
return 0;
}
@ -131,11 +131,11 @@ static ssize_t dccpprobe_read(struct file *file, char __user *buf,
return -ENOMEM;
error = wait_event_interruptible(dccpw.wait,
__kfifo_len(dccpw.fifo) != 0);
__kfifo_len(&dccpw.fifo) != 0);
if (error)
goto out_free;
cnt = kfifo_get(dccpw.fifo, tbuf, len);
cnt = kfifo_get(&dccpw.fifo, tbuf, len);
error = copy_to_user(buf, tbuf, cnt) ? -EFAULT : 0;
out_free:
@ -156,10 +156,8 @@ static __init int dccpprobe_init(void)
init_waitqueue_head(&dccpw.wait);
spin_lock_init(&dccpw.lock);
dccpw.fifo = kfifo_alloc(bufsize, GFP_KERNEL, &dccpw.lock);
if (IS_ERR(dccpw.fifo))
return PTR_ERR(dccpw.fifo);
if (kfifo_alloc(&dccpw.fifo, bufsize, GFP_KERNEL, &dccpw.lock))
return ret;
if (!proc_net_fops_create(&init_net, procname, S_IRUSR, &dccpprobe_fops))
goto err0;
@ -172,14 +170,14 @@ static __init int dccpprobe_init(void)
err1:
proc_net_remove(&init_net, procname);
err0:
kfifo_free(dccpw.fifo);
kfifo_free(&dccpw.fifo);
return ret;
}
module_init(dccpprobe_init);
static __exit void dccpprobe_exit(void)
{
kfifo_free(dccpw.fifo);
kfifo_free(&dccpw.fifo);
proc_net_remove(&init_net, procname);
unregister_jprobe(&dccp_send_probe);