[PATCH] mm/dmapool: remove redundant DMAPOOL_DEBUG macro

[lirongqing]

From: Li RongQing <lirongqing@xxxxxxxxx>

The DMAPOOL_DEBUG macro is only defined when CONFIG_SLUB_DEBUG_ON is
enabled, and it is used exclusively to guard the pool_check_block()
function. Wrapping CONFIG_SLUB_DEBUG_ON in another local macro adds
unnecessary indirection.

Simplify the code by removing DMAPOOL_DEBUG entirely and using the
standard CONFIG_SLUB_DEBUG_ON config option directly.

Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx>
---
 mm/dmapool.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/mm/dmapool.c b/mm/dmapool.c
index 5d8af6e..af43f1a 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -36,10 +36,6 @@
 #include <linux/types.h>
 #include <linux/wait.h>
 
-#ifdef CONFIG_SLUB_DEBUG_ON
-#define DMAPOOL_DEBUG 1
-#endif
-
 struct dma_block {
 	struct dma_block *next_block;
 	dma_addr_t dma;
@@ -92,7 +88,7 @@ static ssize_t pools_show(struct device *dev, struct device_attribute *attr, cha
 
 static DEVICE_ATTR_RO(pools);
 
-#ifdef DMAPOOL_DEBUG
+#ifdef CONFIG_SLUB_DEBUG_ON
 static void pool_check_block(struct dma_pool *pool, struct dma_block *block,
 			     gfp_t mem_flags)
 {
-- 
2.9.4