luck/tmp_suning_uos_patched
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cris: autoconvert trivial BKL users

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All uses of the big kernel lock in the cris architecture
are for ioctl and open functions of character device drivers,
which can be trivially converted to a per-driver mutex.

Most of these are probably unnecessary, so it may make sense
to audit them and eventually remove the extra mutex introduced
by this patch.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: linux-cris-kernel@axis.com
This commit is contained in:
Arnd Bergmann 2010-09-11 18:18:22 +02:00
parent 80eb4a6f89
commit 0890b5880d
8 changed files with 36 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/cris/arch-v10/drivers/ds1302.c
View File

@ -19,7 +19,7 @@
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/bcd.h>
#include <linux/capability.h>
@ -34,6 +34,7 @@
#define RTC_MAJOR_NR 121 /* local major, change later */
static DEFINE_MUTEX(ds1302_mutex);
static const char ds1302_name[] = "ds1302";
/* The DS1302 might be connected to different bits on different products.
@ -357,9 +358,9 @@ static long rtc_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned lon
{
int ret;
lock_kernel();
mutex_lock(&ds1302_mutex);
ret = rtc_ioctl(file, cmd, arg);
unlock_kernel();
mutex_unlock(&ds1302_mutex);
return ret;
}

6
arch/cris/arch-v10/drivers/pcf8563.c
View File

@ -27,7 +27,6 @@
#include <linux/delay.h>
#include <linux/bcd.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@ -49,6 +48,7 @@
#define rtc_read(x) i2c_readreg(RTC_I2C_READ, x)
#define rtc_write(x,y) i2c_writereg(RTC_I2C_WRITE, x, y)
static DEFINE_MUTEX(pcf8563_mutex);
static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
static const unsigned char days_in_month[] =
@ -343,9 +343,9 @@ static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned
{
int ret;
lock_kernel();
mutex_lock(&pcf8563_mutex);
return pcf8563_ioctl(filp, cmd, arg);
unlock_kernel();
mutex_unlock(&pcf8563_mutex);
return ret;
}

11
arch/cris/arch-v10/drivers/sync_serial.c
View File

@ -20,7 +20,7 @@
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/timer.h>
#include <asm/irq.h>
#include <asm/dma.h>
@ -149,6 +149,7 @@ struct sync_port {
};
static DEFINE_MUTEX(sync_serial_mutex);
static int etrax_sync_serial_init(void);
static void initialize_port(int portnbr);
static inline int sync_data_avail(struct sync_port *port);
@ -445,7 +446,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
int mode;
int err = -EBUSY;
lock_kernel();
mutex_lock(&sync_serial_mutex);
DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
if (dev < 0 || dev >= NUMBER_OF_PORTS || !ports[dev].enabled) {
@ -626,7 +627,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
ret = 0;
out:
unlock_kernel();
mutex_unlock(&sync_serial_mutex);
return ret;
}
@ -961,9 +962,9 @@ static long sync_serial_ioctl(struct file *file,
{
long ret;
lock_kernel();
mutex_lock(&sync_serial_mutex);
ret = sync_serial_ioctl_unlocked(file, cmd, arg);
unlock_kernel();
mutex_unlock(&sync_serial_mutex);
return ret;
}

4
arch/cris/arch-v32/drivers/cryptocop.c
View File

@ -3139,9 +3139,9 @@ cryptocop_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
struct inode *inode = file->f_path.dentry->d_inode;
long ret;
lock_kernel();
mutex_lock(&cryptocop_mutex);
ret = cryptocop_ioctl_unlocked(inode, filp, cmd, arg);
unlock_kernel();
mutex_unlock(&cryptocop_mutex);
return ret;
}

11
arch/cris/arch-v32/drivers/mach-a3/gpio.c
View File

@ -23,7 +23,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <asm/etraxgpio.h>
#include <hwregs/reg_map.h>
@ -66,6 +66,7 @@ static int dp_cnt;
#define DP(x)
#endif
static DEFINE_MUTEX(gpio_mutex);
static char gpio_name[] = "etrax gpio";
#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
@ -391,7 +392,7 @@ static int gpio_open(struct inode *inode, struct file *filp)
if (!priv)
return -ENOMEM;
lock_kernel();
mutex_lock(&gpio_mutex);
memset(priv, 0, sizeof(*priv));
priv->minor = p;
@ -414,7 +415,7 @@ static int gpio_open(struct inode *inode, struct file *filp)
spin_unlock_irq(&gpio_lock);
}
unlock_kernel();
mutex_unlock(&gpio_mutex);
return 0;
}
@ -667,9 +668,9 @@ static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&gpio_mutex);
ret = gpio_ioctl_unlocked(file, cmd, arg);
unlock_kernel();
mutex_unlock(&gpio_mutex);
return ret;
}

11
arch/cris/arch-v32/drivers/mach-fs/gpio.c
View File

@ -22,7 +22,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <asm/etraxgpio.h>
#include <hwregs/reg_map.h>
@ -64,6 +64,7 @@ static int dp_cnt;
#define DP(x)
#endif
static DEFINE_MUTEX(gpio_mutex);
static char gpio_name[] = "etrax gpio";
#if 0
@ -429,7 +430,7 @@ gpio_open(struct inode *inode, struct file *filp)
if (!priv)
return -ENOMEM;
lock_kernel();
mutex_lock(&gpio_mutex);
memset(priv, 0, sizeof(*priv));
priv->minor = p;
@ -450,7 +451,7 @@ gpio_open(struct inode *inode, struct file *filp)
alarmlist = priv;
spin_unlock_irq(&alarm_lock);
unlock_kernel();
mutex_unlock(&gpio_mutex);
return 0;
}
@ -708,9 +709,9 @@ static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
long ret;
lock_kernel();
mutex_lock(&gpio_mutex);
ret = gpio_ioctl_unlocked(file, cmd, arg);
unlock_kernel();
mutex_unlock(&gpio_mutex);
return ret;
}

6
arch/cris/arch-v32/drivers/pcf8563.c
View File

@ -24,7 +24,6 @@
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <linux/bcd.h>
#include <linux/mutex.h>
@ -45,6 +44,7 @@
#define rtc_read(x) i2c_readreg(RTC_I2C_READ, x)
#define rtc_write(x,y) i2c_writereg(RTC_I2C_WRITE, x, y)
static DEFINE_MUTEX(pcf8563_mutex);
static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
static const unsigned char days_in_month[] =
@ -339,9 +339,9 @@ static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned
{
int ret;
lock_kernel();
mutex_lock(&pcf8563_mutex);
return pcf8563_ioctl(filp, cmd, arg);
unlock_kernel();
mutex_unlock(&pcf8563_mutex);
return ret;
}

11
arch/cris/arch-v32/drivers/sync_serial.c
View File

@ -13,7 +13,7 @@
#include <linux/errno.h>
#include <linux/major.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/init.h>
@ -145,6 +145,7 @@ typedef struct sync_port
spinlock_t lock;
} sync_port;
static DEFINE_MUTEX(sync_serial_mutex);
static int etrax_sync_serial_init(void);
static void initialize_port(int portnbr);
static inline int sync_data_avail(struct sync_port *port);
@ -434,7 +435,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
reg_dma_rw_cfg cfg = {.en = regk_dma_yes};
reg_dma_rw_intr_mask intr_mask = {.data = regk_dma_yes};
lock_kernel();
mutex_lock(&sync_serial_mutex);
DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled)
@ -583,7 +584,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
port->busy++;
ret = 0;
out:
unlock_kernel();
mutex_unlock(&sync_serial_mutex);
return ret;
}
@ -966,9 +967,9 @@ static long sync_serial_ioctl(struct file *file,
{
long ret;
lock_kernel();
mutex_lock(&sync_serial_mutex);
ret = sync_serial_ioctl_unlocked(file, cmd, arg);
unlock_kernel();
mutex_unlock(&sync_serial_mutex);
return ret;
}