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| author | Jiri Kosina <jkosina@suse.cz> | 2010-08-11 09:36:51 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-08-11 09:36:51 +0200 |
| commit | 6396fc3b3ff3f6b942992b653a62df11dcef9bea (patch) | |
| tree | db3c7cbe833b43c653adc99f70941431c5ff7c4e /drivers/block/z2ram.c | |
| parent | 4785879e4d340e24e54f6de2ccfc42728b912808 (diff) | |
| parent | 3d30701b58970425e1d45994d6cb82f828924fdd (diff) | |
| download | linux-6396fc3b3ff3f6b942992b653a62df11dcef9bea.tar.gz | |
Merge branch 'master' into for-next
Conflicts:
fs/exofs/inode.c
Diffstat (limited to 'drivers/block/z2ram.c')
| -rw-r--r-- | drivers/block/z2ram.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c index 9114654b54d9..d75b2bb601ad 100644 --- a/drivers/block/z2ram.c +++ b/drivers/block/z2ram.c @@ -33,6 +33,7 @@ #include <linux/module.h> #include <linux/blkdev.h> #include <linux/bitops.h> +#include <linux/smp_lock.h> #include <linux/slab.h> #include <asm/setup.h> @@ -153,6 +154,7 @@ static int z2_open(struct block_device *bdev, fmode_t mode) device = MINOR(bdev->bd_dev); + lock_kernel(); if ( current_device != -1 && current_device != device ) { rc = -EBUSY; @@ -294,20 +296,25 @@ static int z2_open(struct block_device *bdev, fmode_t mode) set_capacity(z2ram_gendisk, z2ram_size >> 9); } + unlock_kernel(); return 0; err_out_kfree: kfree(z2ram_map); err_out: + unlock_kernel(); return rc; } static int z2_release(struct gendisk *disk, fmode_t mode) { - if ( current_device == -1 ) - return 0; - + lock_kernel(); + if ( current_device == -1 ) { + unlock_kernel(); + return 0; + } + unlock_kernel(); /* * FIXME: unmap memory */ |