1 files changed, 20 insertions, 13 deletions

diff --git a/arch/parisc/kernel/perf.c b/arch/parisc/kernel/perf.c
index 44670d6e06f4..f6fec62b6a2f 100644
--- a/arch/parisc/kernel/perf.c
+++ b/arch/parisc/kernel/perf.c
@@ -196,8 +196,7 @@ static int perf_open(struct inode *inode, struct file *file);
 static ssize_t perf_read(struct file *file, char __user *buf, size_t cnt, loff_t *ppos);
 static ssize_t perf_write(struct file *file, const char __user *buf, size_t count, 
         loff_t *ppos);
-static int perf_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-        unsigned long arg);
+static long perf_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 static void perf_start_counters(void);
 static int perf_stop_counters(uint32_t *raddr);
 static struct rdr_tbl_ent * perf_rdr_get_entry(uint32_t rdr_num);
@@ -438,48 +437,56 @@ static void perf_patch_images(void)
  * must be running on the processor that you wish to change.
  */
 
-static int perf_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-        unsigned long arg)
+static long perf_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         long error_start;
-        uint32_t raddr[4];      
+        uint32_t raddr[4];
+        int error = 0;
 
+        lock_kernel();
         switch (cmd) {
 
             case PA_PERF_ON:
                         /* Start the counters */
                         perf_start_counters();
-                        return 0;
+                        break;
 
             case PA_PERF_OFF:
                         error_start = perf_stop_counters(raddr);
                         if (error_start != 0) {
                                 printk(KERN_ERR "perf_off: perf_stop_counters = %ld\n", error_start);
-                                return -EFAULT; 
+                                error = -EFAULT;
+                                break;
                         }
 
                         /* copy out the Counters */
                         if (copy_to_user((void __user *)arg, raddr, 
                                         sizeof (raddr)) != 0) {
-                                return -EFAULT;
+                                error =  -EFAULT;
+                                break;
                         }
-                        return 0;
+                        break;
 
             case PA_PERF_VERSION:
                         /* Return the version # */
-                        return put_user(PERF_VERSION, (int *)arg);
+                        error = put_user(PERF_VERSION, (int *)arg);
+                        break;
 
             default:
-                        break;
+                        error = -ENOTTY;
         }
-        return -ENOTTY;
+
+        unlock_kernel();
+
+        return error;
 }
 
 static struct file_operations perf_fops = {
         .llseek = no_llseek,
         .read = perf_read,
         .write = perf_write,
-        .ioctl = perf_ioctl,
+        .unlocked_ioctl = perf_ioctl,
+        .compat_ioctl = perf_ioctl,
         .open = perf_open,
         .release = perf_release
 };