X-Git-Url: http://bbs.cooldavid.org/git/?a=blobdiff_plain;f=drivers%2Fblock%2Fnbd.c;h=a32fb41246f883a0a29fecca2cf70d17b0e7bae2;hb=2a48fc0ab24241755dc93bfd4f01d68efab47f5a;hp=0daa422aa281c4a833299d86252d06abdc337fa4;hpb=2f9e825d3e0e2b407ae8f082de5c00afcf7378fb;p=net-next-2.6.git

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 0daa422aa28..a32fb41246f 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -24,7 +24,7 @@
 #include <linux/errno.h>
 #include <linux/file.h>
 #include <linux/ioctl.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/compiler.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
@@ -53,6 +53,7 @@
 #define DBG_BLKDEV      0x0100
 #define DBG_RX          0x0200
 #define DBG_TX          0x0400
+static DEFINE_MUTEX(nbd_mutex);
 static unsigned int debugflags;
 #endif /* NDEBUG */
 
@@ -717,11 +718,11 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
 	dprintk(DBG_IOCTL, "%s: nbd_ioctl cmd=%s(0x%x) arg=%lu\n",
 			lo->disk->disk_name, ioctl_cmd_to_ascii(cmd), cmd, arg);
 
-	lock_kernel();
+	mutex_lock(&nbd_mutex);
 	mutex_lock(&lo->tx_lock);
 	error = __nbd_ioctl(bdev, lo, cmd, arg);
 	mutex_unlock(&lo->tx_lock);
-	unlock_kernel();
+	mutex_unlock(&nbd_mutex);
 
 	return error;
 }