UBUNTU: Ubuntu-2.6.38-12.51

[linux-flexiantxendom0-natty.git] / block / blk-ioc.c

diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 98e6bf6..b791022 100644 (file)
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -7,6 +7,7 @@
 #include <linux/bio.h>
 #include <linux/blkdev.h>
 #include <linux/bootmem.h>     /* for max_pfn/max_low_pfn */
+#include <linux/slab.h>
 
 #include "blk.h"
 
@@ -63,7 +64,7 @@ static void cfq_exit(struct io_context *ioc)
        rcu_read_unlock();
 }
 
-/* Called by the exitting task */
+/* Called by the exiting task */
 void exit_io_context(struct task_struct *task)
 {
        struct io_context *ioc;
@@ -73,10 +74,9 @@ void exit_io_context(struct task_struct *task)
        task->io_context = NULL;
        task_unlock(task);
 
-       if (atomic_dec_and_test(&ioc->nr_tasks)) {
+       if (atomic_dec_and_test(&ioc->nr_tasks))
                cfq_exit(ioc);
 
-       }
        put_io_context(ioc);
 }
 
@@ -91,7 +91,7 @@ struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
                spin_lock_init(&ret->lock);
                ret->ioprio_changed = 0;
                ret->ioprio = 0;
-               ret->last_waited = jiffies; /* doesn't matter... */
+               ret->last_waited = 0; /* doesn't matter... */
                ret->nr_batch_requests = 0; /* because this is 0 */
                INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH);
                INIT_HLIST_HEAD(&ret->cic_list);
@@ -152,20 +152,6 @@ struct io_context *get_io_context(gfp_t gfp_flags, int node)
 }
 EXPORT_SYMBOL(get_io_context);
 
-void copy_io_context(struct io_context **pdst, struct io_context **psrc)
-{
-       struct io_context *src = *psrc;
-       struct io_context *dst = *pdst;
-
-       if (src) {
-               BUG_ON(atomic_long_read(&src->refcount) == 0);
-               atomic_long_inc(&src->refcount);
-               put_io_context(dst);
-               *pdst = src;
-       }
-}
-EXPORT_SYMBOL(copy_io_context);
-
 static int __init blk_ioc_init(void)
 {
        iocontext_cachep = kmem_cache_create("blkdev_ioc",