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authorArnd Bergmann <arnd@arndb.de>2010-06-02 14:28:52 +0200
committerArnd Bergmann <arnd@arndb.de>2010-10-05 15:01:10 +0200
commit2a48fc0ab24241755dc93bfd4f01d68efab47f5a (patch)
treefa9ae10ce89b26b7d8ae9ce24bdfda5e3007b763 /drivers/block/z2ram.c
parent613655fa39ff6957754fa8ceb8559980920eb8ee (diff)
downloadblackbird-op-linux-2a48fc0ab24241755dc93bfd4f01d68efab47f5a.tar.gz
blackbird-op-linux-2a48fc0ab24241755dc93bfd4f01d68efab47f5a.zip
block: autoconvert trivial BKL users to private mutex
The block device drivers have all gained new lock_kernel calls from a recent pushdown, and some of the drivers were already using the BKL before. This turns the BKL into a set of per-driver mutexes. Still need to check whether this is safe to do. file=$1 name=$2 if grep -q lock_kernel ${file} ; then if grep -q 'include.*linux.mutex.h' ${file} ; then sed -i '/include.*<linux\/smp_lock.h>/d' ${file} else sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file} fi sed -i ${file} \ -e "/^#include.*linux.mutex.h/,$ { 1,/^\(static\|int\|long\)/ { /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex); } }" \ -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \ -e '/[ ]*cycle_kernel_lock();/d' else sed -i -e '/include.*\<smp_lock.h\>/d' ${file} \ -e '/cycle_kernel_lock()/d' fi Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/block/z2ram.c')
-rw-r--r--drivers/block/z2ram.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index d75b2bb601ad..dcd4cfcf4126 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -33,7 +33,7 @@
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/bitops.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/slab.h>
#include <asm/setup.h>
@@ -57,6 +57,7 @@ extern struct mem_info m68k_memory[NUM_MEMINFO];
#define Z2RAM_CHUNK1024 ( Z2RAM_CHUNKSIZE >> 10 )
+static DEFINE_MUTEX(z2ram_mutex);
static u_long *z2ram_map = NULL;
static u_long z2ram_size = 0;
static int z2_count = 0;
@@ -154,7 +155,7 @@ static int z2_open(struct block_device *bdev, fmode_t mode)
device = MINOR(bdev->bd_dev);
- lock_kernel();
+ mutex_lock(&z2ram_mutex);
if ( current_device != -1 && current_device != device )
{
rc = -EBUSY;
@@ -296,25 +297,25 @@ static int z2_open(struct block_device *bdev, fmode_t mode)
set_capacity(z2ram_gendisk, z2ram_size >> 9);
}
- unlock_kernel();
+ mutex_unlock(&z2ram_mutex);
return 0;
err_out_kfree:
kfree(z2ram_map);
err_out:
- unlock_kernel();
+ mutex_unlock(&z2ram_mutex);
return rc;
}
static int
z2_release(struct gendisk *disk, fmode_t mode)
{
- lock_kernel();
+ mutex_lock(&z2ram_mutex);
if ( current_device == -1 ) {
- unlock_kernel();
+ mutex_unlock(&z2ram_mutex);
return 0;
}
- unlock_kernel();
+ mutex_unlock(&z2ram_mutex);
/*
* FIXME: unmap memory
*/
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