From: Axel Lin <axel.lin@gmail.com>
Date: Wed, 20 Jul 2011 03:32:28 +0000 (+0800)
Subject: dmaengine: use DEFINE_IDR for static initialization
X-Git-Tag: firefly_0821_release~3680^2~4722^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=21ef4b8b7a7d59a995bf44382de38c95587767d4;p=firefly-linux-kernel-4.4.55.git

dmaengine: use DEFINE_IDR for static initialization

We could use DEFINE_IDR for statically allocated idr
that allow us to save a few lines of code.

And also remove unneeded mutex_init() for dma_list_mutex, as
dma_list_mutex is initialized automatically by DEFINE_MUTEX().

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 8bcb15fb959d..bc11eebff44d 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -61,9 +61,9 @@
 #include <linux/slab.h>
 
 static DEFINE_MUTEX(dma_list_mutex);
+static DEFINE_IDR(dma_idr);
 static LIST_HEAD(dma_device_list);
 static long dmaengine_ref_count;
-static struct idr dma_idr;
 
 /* --- sysfs implementation --- */
 
@@ -1049,8 +1049,6 @@ EXPORT_SYMBOL_GPL(dma_run_dependencies);
 
 static int __init dma_bus_init(void)
 {
-	idr_init(&dma_idr);
-	mutex_init(&dma_list_mutex);
 	return class_register(&dma_devclass);
 }
 arch_initcall(dma_bus_init);