[MIPS] Lasat: Convert pvc_sem semaphore to mutex

I also changed the name to pvc_mutex, and moved the define to the file
it's used in which allows it to be static.

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 10 insertions, 13 deletions

diff --git a/arch/mips/lasat/picvue.c b/arch/mips/lasat/picvue.c
index 6471d0663fd8..d3d04c392e25 100644
--- a/arch/mips/lasat/picvue.c
+++ b/arch/mips/lasat/picvue.c
@@ -22,8 +22,6 @@
 
 struct pvc_defs *picvue;
 
-DECLARE_MUTEX(pvc_sem);
-
 static void pvc_reg_write(u32 val)
 {
         *picvue->reg = val;
diff --git a/arch/mips/lasat/picvue.h b/arch/mips/lasat/picvue.h
index 2a96bf971897..91df55371127 100644
--- a/arch/mips/lasat/picvue.h
+++ b/arch/mips/lasat/picvue.h
@@ -4,8 +4,6 @@
  * Brian Murphy <brian.murphy@eicon.com>
  *
  */
-#include <asm/semaphore.h>
-
 struct pvc_defs {
         volatile u32 *reg;
         u32 data_shift;
@@ -45,4 +43,3 @@ void pvc_move(u8 cmd);
 void pvc_clear(void);
 void pvc_home(void);
 
-extern struct semaphore pvc_sem;
diff --git a/arch/mips/lasat/picvue_proc.c b/arch/mips/lasat/picvue_proc.c
index 9947c1525822..0bb6037afba3 100644
--- a/arch/mips/lasat/picvue_proc.c
+++ b/arch/mips/lasat/picvue_proc.c
@@ -13,9 +13,11 @@
 #include <linux/interrupt.h>
 
 #include <linux/timer.h>
+#include <linux/mutex.h>
 
 #include "picvue.h"
 
+static DEFINE_MUTEX(pvc_mutex);
 static char pvc_lines[PVC_NLINES][PVC_LINELEN+1];
 static int pvc_linedata[PVC_NLINES];
 static struct proc_dir_entry *pvc_display_dir;
@@ -48,9 +50,9 @@ static int pvc_proc_read_line(char *page, char **start,
                 return 0;
         }
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         page += sprintf(page, "%s\n", pvc_lines[lineno]);
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         return page - origpage;
 }
@@ -73,10 +75,10 @@ static int pvc_proc_write_line(struct file *file, const char *buffer,
         if (buffer[count-1] == '\n')
                 count--;
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         strncpy(pvc_lines[lineno], buffer, count);
         pvc_lines[lineno][count] = '\0';
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         tasklet_schedule(&pvc_display_tasklet);
 
@@ -89,7 +91,7 @@ static int pvc_proc_write_scroll(struct file *file, const char *buffer,
         int origcount = count;
         int cmd = simple_strtol(buffer, NULL, 10);
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         if (scroll_interval != 0)
                 del_timer(&timer);
 
@@ -106,7 +108,7 @@ static int pvc_proc_write_scroll(struct file *file, const char *buffer,
                 }
                 add_timer(&timer);
         }
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         return origcount;
 }
@@ -117,9 +119,9 @@ static int pvc_proc_read_scroll(char *page, char **start,
 {
         char *origpage = page;
 
-        down(&pvc_sem);
+        mutex_lock(&pvc_mutex);
         page += sprintf(page, "%d\n", scroll_dir * scroll_interval);
-        up(&pvc_sem);
+        mutex_unlock(&pvc_mutex);
 
         return page - origpage;
 }