block: remove unused copy_io_context()

Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index d22c4c5..3c7a339 100644 (file)
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -153,20 +153,6 @@ 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",

diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index 3e70b21..b2eee89 100644 (file)
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -76,7 +76,6 @@ int put_io_context(struct io_context *ioc);
 void exit_io_context(struct task_struct *task);
 struct io_context *get_io_context(gfp_t gfp_flags, int node);
 struct io_context *alloc_io_context(gfp_t gfp_flags, int node);
-void copy_io_context(struct io_context **pdst, struct io_context **psrc);
 #else
 static inline void exit_io_context(struct task_struct *task)
 {