aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/md/md.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-22 13:49:54 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-22 13:49:54 -0400
commitc37927d4359e81b85de644f8fb08878717cf5f3f (patch)
tree25dabf2d905e1410819d1bdaba0bf5f779100d3c /drivers/md/md.c
parent5704e44d283e907623e3775c1262f206a2c48cf3 (diff)
parent2a48fc0ab24241755dc93bfd4f01d68efab47f5a (diff)
Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
* 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: block: autoconvert trivial BKL users to private mutex drivers: autoconvert trivial BKL users to private mutex ipmi: autoconvert trivial BKL users to private mutex mac: autoconvert trivial BKL users to private mutex mtd: autoconvert trivial BKL users to private mutex scsi: autoconvert trivial BKL users to private mutex Fix up trivial conflicts (due to addition of private mutex right next to deletion of a version string) in drivers/char/pcmcia/cm40[04]0_cs.c
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index f20d13e717d5..dbf822df942a 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -36,7 +36,7 @@
36#include <linux/blkdev.h> 36#include <linux/blkdev.h>
37#include <linux/sysctl.h> 37#include <linux/sysctl.h>
38#include <linux/seq_file.h> 38#include <linux/seq_file.h>
39#include <linux/smp_lock.h> 39#include <linux/mutex.h>
40#include <linux/buffer_head.h> /* for invalidate_bdev */ 40#include <linux/buffer_head.h> /* for invalidate_bdev */
41#include <linux/poll.h> 41#include <linux/poll.h>
42#include <linux/ctype.h> 42#include <linux/ctype.h>
@@ -57,6 +57,7 @@
57#define DEBUG 0 57#define DEBUG 0
58#define dprintk(x...) ((void)(DEBUG && printk(x))) 58#define dprintk(x...) ((void)(DEBUG && printk(x)))
59 59
60static DEFINE_MUTEX(md_mutex);
60 61
61#ifndef MODULE 62#ifndef MODULE
62static void autostart_arrays(int part); 63static void autostart_arrays(int part);
@@ -5951,7 +5952,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
5951 mddev_t *mddev = mddev_find(bdev->bd_dev); 5952 mddev_t *mddev = mddev_find(bdev->bd_dev);
5952 int err; 5953 int err;
5953 5954
5954 lock_kernel(); 5955 mutex_lock(&md_mutex);
5955 if (mddev->gendisk != bdev->bd_disk) { 5956 if (mddev->gendisk != bdev->bd_disk) {
5956 /* we are racing with mddev_put which is discarding this 5957 /* we are racing with mddev_put which is discarding this
5957 * bd_disk. 5958 * bd_disk.
@@ -5960,7 +5961,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
5960 /* Wait until bdev->bd_disk is definitely gone */ 5961 /* Wait until bdev->bd_disk is definitely gone */
5961 flush_scheduled_work(); 5962 flush_scheduled_work();
5962 /* Then retry the open from the top */ 5963 /* Then retry the open from the top */
5963 unlock_kernel(); 5964 mutex_unlock(&md_mutex);
5964 return -ERESTARTSYS; 5965 return -ERESTARTSYS;
5965 } 5966 }
5966 BUG_ON(mddev != bdev->bd_disk->private_data); 5967 BUG_ON(mddev != bdev->bd_disk->private_data);
@@ -5974,7 +5975,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
5974 5975
5975 check_disk_size_change(mddev->gendisk, bdev); 5976 check_disk_size_change(mddev->gendisk, bdev);
5976 out: 5977 out:
5977 unlock_kernel(); 5978 mutex_unlock(&md_mutex);
5978 return err; 5979 return err;
5979} 5980}
5980 5981
@@ -5983,10 +5984,10 @@ static int md_release(struct gendisk *disk, fmode_t mode)
5983 mddev_t *mddev = disk->private_data; 5984 mddev_t *mddev = disk->private_data;
5984 5985
5985 BUG_ON(!mddev); 5986 BUG_ON(!mddev);
5986 lock_kernel(); 5987 mutex_lock(&md_mutex);
5987 atomic_dec(&mddev->openers); 5988 atomic_dec(&mddev->openers);
5988 mddev_put(mddev); 5989 mddev_put(mddev);
5989 unlock_kernel(); 5990 mutex_unlock(&md_mutex);
5990 5991
5991 return 0; 5992 return 0;
5992} 5993}