[SCSI] turn most scsi semaphores into mutexes
the scsi layer is using semaphores in a mutex way, this patch converts
these into using mutexes instead
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index ee5f4df..245ca99 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -55,6 +55,7 @@
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/cpu.h>
+#include <linux/mutex.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -209,7 +210,7 @@
.gfp_mask = __GFP_DMA,
};
-static DECLARE_MUTEX(host_cmd_pool_mutex);
+static DEFINE_MUTEX(host_cmd_pool_mutex);
static struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *shost,
gfp_t gfp_mask)
@@ -330,7 +331,7 @@
* Select a command slab for this host and create it if not
* yet existant.
*/
- down(&host_cmd_pool_mutex);
+ mutex_lock(&host_cmd_pool_mutex);
pool = (shost->unchecked_isa_dma ? &scsi_cmd_dma_pool : &scsi_cmd_pool);
if (!pool->users) {
pool->slab = kmem_cache_create(pool->name,
@@ -342,7 +343,7 @@
pool->users++;
shost->cmd_pool = pool;
- up(&host_cmd_pool_mutex);
+ mutex_unlock(&host_cmd_pool_mutex);
/*
* Get one backup command for this host.
@@ -359,7 +360,7 @@
kmem_cache_destroy(pool->slab);
return -ENOMEM;
fail:
- up(&host_cmd_pool_mutex);
+ mutex_unlock(&host_cmd_pool_mutex);
return -ENOMEM;
}
@@ -381,10 +382,10 @@
kmem_cache_free(shost->cmd_pool->slab, cmd);
}
- down(&host_cmd_pool_mutex);
+ mutex_lock(&host_cmd_pool_mutex);
if (!--shost->cmd_pool->users)
kmem_cache_destroy(shost->cmd_pool->slab);
- up(&host_cmd_pool_mutex);
+ mutex_unlock(&host_cmd_pool_mutex);
}
#ifdef CONFIG_SCSI_LOGGING