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linux-sg2042
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Input: input core - semaphore to mutex conversion 

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Jes Sorensen 2006-02-19 00:21:46 -05:00 committed by Dmitry Torokhov
parent 02860ab6cd
commit e676c232e6
2 changed files with 9 additions and 8 deletions
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15
drivers/input/input.c
View File

@ -21,6 +21,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/poll.h> #include <linux/poll.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/mutex.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION("Input core"); MODULE_DESCRIPTION("Input core");
@ -224,7 +225,7 @@ int input_open_device(struct input_handle *handle)
struct input_dev *dev = handle->dev; struct input_dev *dev = handle->dev;
int err; int err;
err = down_interruptible(&dev->sem); err = mutex_lock_interruptible(&dev->mutex);
if (err) if (err)
return err; return err;
@ -236,7 +237,7 @@ int input_open_device(struct input_handle *handle)
if (err) if (err)
handle->open--; handle->open--;
up(&dev->sem); mutex_unlock(&dev->mutex);
return err; return err;
} }
@ -255,13 +256,13 @@ void input_close_device(struct input_handle *handle)
input_release_device(handle); input_release_device(handle);
down(&dev->sem); mutex_lock(&dev->mutex);
if (!--dev->users && dev->close) if (!--dev->users && dev->close)
dev->close(dev); dev->close(dev);
handle->open--; handle->open--;
up(&dev->sem); mutex_unlock(&dev->mutex);
} }
static void input_link_handle(struct input_handle *handle) static void input_link_handle(struct input_handle *handle)
@ -512,13 +513,13 @@ static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
struct input_dev *input_dev = to_input_dev(dev); \ struct input_dev *input_dev = to_input_dev(dev); \
int retval; \ int retval; \
\ \
retval = down_interruptible(&input_dev->sem); \ retval = mutex_lock_interruptible(&input_dev->mutex); \
if (retval) \ if (retval) \
return retval; \ return retval; \
\ \
retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \ retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \
\ \
up(&input_dev->sem); \ mutex_unlock(&input_dev->mutex); \
\ \
return retval; \ return retval; \
} \ } \
@ -790,7 +791,7 @@ int input_register_device(struct input_dev *dev)
return -EINVAL; return -EINVAL;
} }
init_MUTEX(&dev->sem); mutex_init(&dev->mutex);
set_bit(EV_SYN, dev->evbit); set_bit(EV_SYN, dev->evbit);
/* /*

2
include/linux/input.h
View File

@ -929,7 +929,7 @@ struct input_dev {
struct input_handle *grab; struct input_handle *grab;
struct semaphore sem; /* serializes open and close operations */ struct mutex mutex; /* serializes open and close operations */
unsigned int users; unsigned int users;
struct class_device cdev; struct class_device cdev;