diff options
Diffstat (limited to 'drivers/char/mmtimer.c')
| -rw-r--r-- | drivers/char/mmtimer.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c index 192961fd7173..918711aa56f3 100644 --- a/drivers/char/mmtimer.c +++ b/drivers/char/mmtimer.c @@ -32,6 +32,7 @@ #include <linux/interrupt.h> #include <linux/time.h> #include <linux/math64.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/sn/addrs.h> @@ -57,8 +58,8 @@ extern unsigned long sn_rtc_cycles_per_second; #define rtc_time() (*RTC_COUNTER_ADDR) -static int mmtimer_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg); +static long mmtimer_ioctl(struct file *file, unsigned int cmd, + unsigned long arg); static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma); /* @@ -67,9 +68,9 @@ static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma); static unsigned long mmtimer_femtoperiod = 0; static const struct file_operations mmtimer_fops = { - .owner = THIS_MODULE, - .mmap = mmtimer_mmap, - .ioctl = mmtimer_ioctl, + .owner = THIS_MODULE, + .mmap = mmtimer_mmap, + .unlocked_ioctl = mmtimer_ioctl, }; /* @@ -339,7 +340,6 @@ restart: /** * mmtimer_ioctl - ioctl interface for /dev/mmtimer - * @inode: inode of the device * @file: file structure for the device * @cmd: command to execute * @arg: optional argument to command @@ -365,11 +365,13 @@ restart: * %MMTIMER_GETCOUNTER - Gets the current value in the counter and places it * in the address specified by @arg. */ -static int mmtimer_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) +static long mmtimer_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { int ret = 0; + lock_kernel(); + switch (cmd) { case MMTIMER_GETOFFSET: /* offset of the counter */ /* @@ -384,15 +386,14 @@ static int mmtimer_ioctl(struct inode *inode, struct file *file, case MMTIMER_GETRES: /* resolution of the clock in 10^-15 s */ if(copy_to_user((unsigned long __user *)arg, &mmtimer_femtoperiod, sizeof(unsigned long))) - return -EFAULT; + ret = -EFAULT; break; case MMTIMER_GETFREQ: /* frequency in Hz */ if(copy_to_user((unsigned long __user *)arg, &sn_rtc_cycles_per_second, sizeof(unsigned long))) - return -EFAULT; - ret = 0; + ret = -EFAULT; break; case MMTIMER_GETBITS: /* number of bits in the clock */ @@ -406,13 +407,13 @@ static int mmtimer_ioctl(struct inode *inode, struct file *file, case MMTIMER_GETCOUNTER: if(copy_to_user((unsigned long __user *)arg, RTC_COUNTER_ADDR, sizeof(unsigned long))) - return -EFAULT; + ret = -EFAULT; break; default: - ret = -ENOSYS; + ret = -ENOTTY; break; } - + unlock_kernel(); return ret; } |