From: Jens Axboe <jaxboe@fusionio.com>
Date: Thu, 11 Nov 2010 12:37:54 +0000 (+0100)
Subject: block: remove unused copy_io_context()
X-Git-Tag: 2.1b_release~6170^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cedb4a7d9f6aedb0dce94d6285b69dcb3c10fa05;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

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
--- 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
--- 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)
 {