1 files changed, 21 insertions, 16 deletions

diff --git a/drivers/char/efirtc.c b/drivers/char/efirtc.c
index 49233f589874..67fbd7aab5db 100644
--- a/drivers/char/efirtc.c
+++ b/drivers/char/efirtc.c
@@ -28,6 +28,7 @@
  */
 
 
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
@@ -36,8 +37,9 @@
 #include <linux/rtc.h>
 #include <linux/proc_fs.h>
 #include <linux/efi.h>
+#include <linux/smp_lock.h>
+#include <linux/uaccess.h>
 
-#include <asm/uaccess.h>
 #include <asm/system.h>
 
 #define EFI_RTC_VERSION         "0.4"
@@ -50,8 +52,8 @@
 
 static DEFINE_SPINLOCK(efi_rtc_lock);
 
-static int efi_rtc_ioctl(struct inode *inode, struct file *file,
-                     unsigned int cmd, unsigned long arg);
+static long efi_rtc_ioctl(struct file *file, unsigned int cmd,
+                                                        unsigned long arg);
 
 #define is_leap(year) \
           ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
@@ -145,9 +147,8 @@ convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime)
         }
 }
 
-static int
-efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-                     unsigned long arg)
+static long efi_rtc_ioctl(struct file *file, unsigned int cmd,
+                                                        unsigned long arg)
 {
 
         efi_status_t    status;
@@ -174,13 +175,13 @@ efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                         return -EINVAL;
 
                 case RTC_RD_TIME:
-
+                        lock_kernel();
                         spin_lock_irqsave(&efi_rtc_lock, flags);
 
                         status = efi.get_time(&eft, &cap);
 
                         spin_unlock_irqrestore(&efi_rtc_lock,flags);
-
+                        unlock_kernel();
                         if (status != EFI_SUCCESS) {
                                 /* should never happen */
                                 printk(KERN_ERR "efitime: can't read time\n");
@@ -202,11 +203,13 @@ efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
                         convert_to_efi_time(&wtime, &eft);
 
+                        lock_kernel();
                         spin_lock_irqsave(&efi_rtc_lock, flags);
 
                         status = efi.set_time(&eft);
 
                         spin_unlock_irqrestore(&efi_rtc_lock,flags);
+                        unlock_kernel();
 
                         return status == EFI_SUCCESS ? 0 : -EINVAL;
 
@@ -222,6 +225,7 @@ efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
                         convert_to_efi_time(&wtime, &eft);
 
+                        lock_kernel();
                         spin_lock_irqsave(&efi_rtc_lock, flags);
                         /*
                          * XXX Fixme:
@@ -232,16 +236,19 @@ efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                         status = efi.set_wakeup_time((efi_bool_t)enabled, &eft);
 
                         spin_unlock_irqrestore(&efi_rtc_lock,flags);
+                        unlock_kernel();
 
                         return status == EFI_SUCCESS ? 0 : -EINVAL;
 
                 case RTC_WKALM_RD:
 
+                        lock_kernel();
                         spin_lock_irqsave(&efi_rtc_lock, flags);
 
                         status = efi.get_wakeup_time((efi_bool_t *)&enabled, (efi_bool_t *)&pending, &eft);
 
                         spin_unlock_irqrestore(&efi_rtc_lock,flags);
+                        unlock_kernel();
 
                         if (status != EFI_SUCCESS) return -EINVAL;
 
@@ -255,7 +262,7 @@ efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                         return copy_to_user(&ewp->time, &wtime,
                                             sizeof(struct rtc_time)) ? -EFAULT : 0;
         }
-        return -EINVAL;
+        return -ENOTTY;
 }
 
 /*
@@ -264,19 +271,18 @@ efi_rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
  *      up things on a close.
  */
 
-static int
-efi_rtc_open(struct inode *inode, struct file *file)
+static int efi_rtc_open(struct inode *inode, struct file *file)
 {
         /*
          * nothing special to do here
          * We do accept multiple open files at the same time as we
          * synchronize on the per call operation.
          */
+        cycle_kernel_lock();
         return 0;
 }
 
-static int
-efi_rtc_close(struct inode *inode, struct file *file)
+static int efi_rtc_close(struct inode *inode, struct file *file)
 {
         return 0;
 }
@@ -287,13 +293,12 @@ efi_rtc_close(struct inode *inode, struct file *file)
 
 static const struct file_operations efi_rtc_fops = {
         .owner          = THIS_MODULE,
-        .ioctl          = efi_rtc_ioctl,
+        .unlocked_ioctl = efi_rtc_ioctl,
         .open           = efi_rtc_open,
         .release        = efi_rtc_close,
 };
 
-static struct miscdevice efi_rtc_dev=
-{
+static struct miscdevice efi_rtc_dev= {
         EFI_RTC_MINOR,
         "efirtc",
         &efi_rtc_fops