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| author | Matthias Kaehlcke <matthias.kaehlcke@gmail.com> | 2007-04-24 22:45:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-27 10:57:32 -0700 |
| commit | b2366d68d9ec3498b342507facf526c1f66ffa41 (patch) | |
| tree | 5435ab9f6b328d2e04250274618f775ee58172d8 /drivers/base/dmapool.c | |
| parent | 4f6e1945fecad6ac8134e9fa68b7708e55690e9e (diff) | |
| download | lwn-b2366d68d9ec3498b342507facf526c1f66ffa41.tar.gz lwn-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/dmapool.c')
| -rw-r--r-- | drivers/base/dmapool.c | 14 |
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; |