UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

mmtimer: Push BKL down into the ioctl handler 

Switches to unlocked_ioctl read to remove ioctl BKL method. Fix the
unknown ioctl return. Probably a nice easy one to kill off BKL usage
entirely later

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Alan Cox 2008-05-22 21:42:44 +01:00 committed by Tony Luck
parent fb86611f8f
commit 4cddb886a4
1 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/char/mmtimer.c
View File

@ -32,6 +32,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/time.h> #include <linux/time.h>
#include <linux/math64.h> #include <linux/math64.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include <asm/sn/addrs.h> #include <asm/sn/addrs.h>
@ -57,8 +58,8 @@ extern unsigned long sn_rtc_cycles_per_second;
#define rtc_time() (*RTC_COUNTER_ADDR) #define rtc_time() (*RTC_COUNTER_ADDR)
static int mmtimer_ioctl(struct inode *inode, struct file *file, static long mmtimer_ioctl(struct file *file, unsigned int cmd,
unsigned int cmd, unsigned long arg); unsigned long arg);
static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma); 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 unsigned long mmtimer_femtoperiod = 0;
static const struct file_operations mmtimer_fops = { static const struct file_operations mmtimer_fops = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.mmap = mmtimer_mmap, .mmap = mmtimer_mmap,
.ioctl = mmtimer_ioctl, .unlocked_ioctl = mmtimer_ioctl,
}; };
/* /*
@ -339,7 +340,6 @@ restart:
/** /**
* mmtimer_ioctl - ioctl interface for /dev/mmtimer * mmtimer_ioctl - ioctl interface for /dev/mmtimer
* @inode: inode of the device
* @file: file structure for the device * @file: file structure for the device
* @cmd: command to execute * @cmd: command to execute
* @arg: optional argument to command * @arg: optional argument to command
@ -365,11 +365,13 @@ restart:
* %MMTIMER_GETCOUNTER - Gets the current value in the counter and places it * %MMTIMER_GETCOUNTER - Gets the current value in the counter and places it
* in the address specified by @arg. * in the address specified by @arg.
*/ */
static int mmtimer_ioctl(struct inode *inode, struct file *file, static long mmtimer_ioctl(struct file *file, unsigned int cmd,
unsigned int cmd, unsigned long arg) unsigned long arg)
{ {
int ret = 0; int ret = 0;
lock_kernel();
switch (cmd) { switch (cmd) {
case MMTIMER_GETOFFSET: /* offset of the counter */ 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 */ case MMTIMER_GETRES: /* resolution of the clock in 10^-15 s */
if(copy_to_user((unsigned long __user *)arg, if(copy_to_user((unsigned long __user *)arg,
&mmtimer_femtoperiod, sizeof(unsigned long))) &mmtimer_femtoperiod, sizeof(unsigned long)))
return -EFAULT; ret = -EFAULT;
break; break;
case MMTIMER_GETFREQ: /* frequency in Hz */ case MMTIMER_GETFREQ: /* frequency in Hz */
if(copy_to_user((unsigned long __user *)arg, if(copy_to_user((unsigned long __user *)arg,
&sn_rtc_cycles_per_second, &sn_rtc_cycles_per_second,
sizeof(unsigned long))) sizeof(unsigned long)))
return -EFAULT; ret = -EFAULT;
ret = 0;
break; break;
case MMTIMER_GETBITS: /* number of bits in the clock */ 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: case MMTIMER_GETCOUNTER:
if(copy_to_user((unsigned long __user *)arg, if(copy_to_user((unsigned long __user *)arg,
RTC_COUNTER_ADDR, sizeof(unsigned long))) RTC_COUNTER_ADDR, sizeof(unsigned long)))
return -EFAULT; ret = -EFAULT;
break; break;
default: default:
ret = -ENOSYS; ret = -ENOTTY;
break; break;
} }
unlock_kernel();
return ret; return ret;
} }