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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 15:22:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 15:22:42 -0700 |
| commit | 2f9e825d3e0e2b407ae8f082de5c00afcf7378fb (patch) | |
| tree | f8b3ee40674ce4acd5508a0a0bf52a30904caf6c /drivers/block/z2ram.c | |
| parent | 7ae0dea900b027cd90e8a3e14deca9a19e17638b (diff) | |
| parent | de75d60d5ea235e6e09f4962ab22541ce0fe176a (diff) | |
Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block: (149 commits)
block: make sure that REQ_* types are seen even with CONFIG_BLOCK=n
xen-blkfront: fix missing out label
blkdev: fix blkdev_issue_zeroout return value
block: update request stacking methods to support discards
block: fix missing export of blk_types.h
writeback: fix bad _bh spinlock nesting
drbd: revert "delay probes", feature is being re-implemented differently
drbd: Initialize all members of sync_conf to their defaults [Bugz 315]
drbd: Disable delay probes for the upcomming release
writeback: cleanup bdi_register
writeback: add new tracepoints
writeback: remove unnecessary init_timer call
writeback: optimize periodic bdi thread wakeups
writeback: prevent unnecessary bdi threads wakeups
writeback: move bdi threads exiting logic to the forker thread
writeback: restructure bdi forker loop a little
writeback: move last_active to bdi
writeback: do not remove bdi from bdi_list
writeback: simplify bdi code a little
writeback: do not lose wake-ups in bdi threads
...
Fixed up pretty trivial conflicts in drivers/block/virtio_blk.c and
drivers/scsi/scsi_error.c as per Jens.
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 9114654b54d..d75b2bb601a 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 */ |