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authorMatthias Kaehlcke <matthias.kaehlcke@gmail.com>2007-04-24 22:45:25 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2007-04-27 19:57:32 +0200
commitb2366d68d9ec3498b342507facf526c1f66ffa41 (patch)
tree5435ab9f6b328d2e04250274618f775ee58172d8 /drivers/base
parentdriver core: bus_add_driver should return an error if no bus (diff)
downloadlinux-b2366d68d9ec3498b342507facf526c1f66ffa41.tar.xz
linux-b2366d68d9ec3498b342507facf526c1f66ffa41.zip
Driver core: use mutex instead of semaphore in DMA pool handler
the DMA pool handler uses a semaphore as mutex. use the mutex API instead of the (binary) semaphore Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/dmapool.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/base/dmapool.c b/drivers/base/dmapool.c
index cd467c9f33b3..9406259754ad 100644
--- a/drivers/base/dmapool.c
+++ b/drivers/base/dmapool.c
@@ -37,7 +37,7 @@ struct dma_page { /* cacheable header for 'allocation' bytes */
#define POOL_TIMEOUT_JIFFIES ((100 /* msec */ * HZ) / 1000)
-static DECLARE_MUTEX (pools_lock);
+static DEFINE_MUTEX (pools_lock);
static ssize_t
show_pools (struct device *dev, struct device_attribute *attr, char *buf)
@@ -55,7 +55,7 @@ show_pools (struct device *dev, struct device_attribute *attr, char *buf)
size -= temp;
next += temp;
- down (&pools_lock);
+ mutex_lock(&pools_lock);
list_for_each_entry(pool, &dev->dma_pools, pools) {
unsigned pages = 0;
unsigned blocks = 0;
@@ -73,7 +73,7 @@ show_pools (struct device *dev, struct device_attribute *attr, char *buf)
size -= temp;
next += temp;
}
- up (&pools_lock);
+ mutex_unlock(&pools_lock);
return PAGE_SIZE - size;
}
@@ -143,7 +143,7 @@ dma_pool_create (const char *name, struct device *dev,
if (dev) {
int ret;
- down (&pools_lock);
+ mutex_lock(&pools_lock);
if (list_empty (&dev->dma_pools))
ret = device_create_file (dev, &dev_attr_pools);
else
@@ -155,7 +155,7 @@ dma_pool_create (const char *name, struct device *dev,
kfree(retval);
retval = NULL;
}
- up (&pools_lock);
+ mutex_unlock(&pools_lock);
} else
INIT_LIST_HEAD (&retval->pools);
@@ -231,11 +231,11 @@ pool_free_page (struct dma_pool *pool, struct dma_page *page)
void
dma_pool_destroy (struct dma_pool *pool)
{
- down (&pools_lock);
+ mutex_lock(&pools_lock);
list_del (&pool->pools);
if (pool->dev && list_empty (&pool->dev->dma_pools))
device_remove_file (pool->dev, &dev_attr_pools);
- up (&pools_lock);
+ mutex_unlock(&pools_lock);
while (!list_empty (&pool->page_list)) {
struct dma_page *page;