diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2010-05-31 22:38:40 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2010-09-26 16:25:51 +0200 |
| commit | cfdb00a77ea7d5fb922fd985e5dfbcb36873411b (patch) | |
| tree | d5b70c7edc95cad7271342214d3e4338f37e02c2 /drivers/s390/block/dasd.c | |
| parent | 54066a57c584ee8ce767053116fc4943ed1168b5 (diff) | |
| download | linux-cfdb00a77ea7d5fb922fd985e5dfbcb36873411b.tar.gz | |
s390/block: kill the big kernel lock
The dasd and dcssblk drivers gained the big
kernel lock in the recent pushdown from the
block layer, but they don't really need it,
so remove the calls without a replacement.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 8373ca0de8e0b..38e6fa9a2012f 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -21,7 +21,6 @@ #include <linux/hdreg.h> #include <linux/async.h> #include <linux/mutex.h> -#include <linux/smp_lock.h> #include <asm/ccwdev.h> #include <asm/ebcdic.h> @@ -2236,7 +2235,6 @@ static int dasd_open(struct block_device *bdev, fmode_t mode) if (!block) return -ENODEV; - lock_kernel(); base = block->base; atomic_inc(&block->open_count); if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) { @@ -2271,14 +2269,12 @@ static int dasd_open(struct block_device *bdev, fmode_t mode) goto out; } - unlock_kernel(); return 0; out: module_put(base->discipline->owner); unlock: atomic_dec(&block->open_count); - unlock_kernel(); return rc; } @@ -2286,10 +2282,8 @@ static int dasd_release(struct gendisk *disk, fmode_t mode) { struct dasd_block *block = disk->private_data; - lock_kernel(); atomic_dec(&block->open_count); module_put(block->base->discipline->owner); - unlock_kernel(); return 0; } |