From: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>

The MTD ST M25Pxx driver uses a semaphore as mutex.  Use the mutex API instead
of the (binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/mtd/devices/m25p80.c |   21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff -puN drivers/mtd/devices/m25p80.c~use-mutex-instead-of-semaphore-in-the-mtd-st-m25pxx-driver drivers/mtd/devices/m25p80.c
--- a/drivers/mtd/devices/m25p80.c~use-mutex-instead-of-semaphore-in-the-mtd-st-m25pxx-driver
+++ a/drivers/mtd/devices/m25p80.c
@@ -24,8 +24,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/flash.h>
-
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 
 /* NOTE: AT 25F and SST 25LF series are very similar,
@@ -201,13 +200,13 @@ static int m25p80_erase(struct mtd_info 
 	addr = instr->addr;
 	len = instr->len;
 
-  	down(&flash->lock);
+	mutex_lock(&flash->lock);
 
 	/* now erase those sectors */
 	while (len) {
 		if (erase_sector(flash, addr)) {
 			instr->state = MTD_ERASE_FAILED;
-			up(&flash->lock);
+			mutex_unlock(&flash->lock);
 			return -EIO;
 		}
 
@@ -215,7 +214,7 @@ static int m25p80_erase(struct mtd_info 
 		len -= mtd->erasesize;
 	}
 
-  	up(&flash->lock);
+	mutex_unlock(&flash->lock);
 
 	instr->state = MTD_ERASE_DONE;
 	mtd_erase_callback(instr);
@@ -260,12 +259,12 @@ static int m25p80_read(struct mtd_info *
 	if (retlen)
 		*retlen = 0;
 
-	down(&flash->lock);
+	mutex_lock(&flash->lock);
 
 	/* Wait till previous write/erase is done. */
 	if (wait_till_ready(flash)) {
 		/* REVISIT status return?? */
-		up(&flash->lock);
+		mutex_unlock(&flash->lock);
 		return 1;
 	}
 
@@ -281,7 +280,7 @@ static int m25p80_read(struct mtd_info *
 
 	*retlen = m.actual_length - sizeof(flash->command);
 
-  	up(&flash->lock);
+	mutex_unlock(&flash->lock);
 
 	return 0;
 }
@@ -323,7 +322,7 @@ static int m25p80_write(struct mtd_info 
 	t[1].tx_buf = buf;
 	spi_message_add_tail(&t[1], &m);
 
-  	down(&flash->lock);
+	mutex_lock(&flash->lock);
 
 	/* Wait until finished previous write command. */
 	if (wait_till_ready(flash))
@@ -384,7 +383,7 @@ static int m25p80_write(struct mtd_info 
 	        }
  	}
 
-	up(&flash->lock);
+	mutex_unlock(&flash->lock);
 
 	return 0;
 }
@@ -456,7 +455,7 @@ static int __devinit m25p_probe(struct s
 		return -ENOMEM;
 
 	flash->spi = spi;
-	init_MUTEX(&flash->lock);
+	mutex_init(&flash->lock);
 	dev_set_drvdata(&spi->dev, flash);
 
 	if (data->name)
_