[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>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index ee5f4dfdab14..245ca99a641e 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 @@ static struct scsi_host_cmd_pool scsi_cmd_dma_pool = {
         .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 @@ int scsi_setup_command_freelist(struct Scsi_Host *shost)
          * 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 @@ int scsi_setup_command_freelist(struct Scsi_Host *shost)
 
         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 @@ int scsi_setup_command_freelist(struct Scsi_Host *shost)
                 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 @@ void scsi_destroy_command_freelist(struct Scsi_Host *shost)
                 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